- Current Catalog
- Featured Articles Browse Issues
-
HU Fang, LIU Tao, PENG Shuhua, YI Qiaoqiao, HU Yu, JIANG Fengyi, YANG Zitong
2026(6):1-9
Abstract:
Inland waterway transportation plays a significant role in promoting the economic development and supporting the domestic large circulation.In recent years,the proportion of inland waterway freight volume to the national freight volume has steadily increased，rising from 8.07% in 2020 to 8.71% in 2024.The high-quality development of inland waterway transportation has achieved remarkable results,with significant growth in indicators such as waterway investment，waterway network，port hubs，vessel equipment，and passenger and cargo transportation.However，there are still some shortcomings.In response to the insufficient capabilities of“hard connectivity”of inland waterway transportation infrastructure and“soft improvement”of transportation services，the proportion of high-grade waterways is only 12.4%，and the development of green and intelligent transportation，and safety capabilities need to be improved.Under the guidance of transportation power strategy and the“1+1+N”policy system for high-quality development of inland waterway transportation，strategies for accelerating the construction of a modern inland waterway shipping system are proposed,which can provide ideas and specific measures for various regions to improve the inland waterway network，enhance the quality of services，and promote the green and intelligent transformation of shipping，promoting the high-quality development of inland waterway transportation.
-
ZHAO Ziyao, XI Fang, WEN Guangbiao
2026(6):10-16
Abstract:
In response to the requirements for high-quality development of water transport in the new era and to lead the standardized development of smart water transport in Guangdong Province，a “six-dimensional model method” is adopted to construct the smart water transport standard system of Guangdong Province.This method breaks through the traditional single-dimensional framework.Centering on the connotation of smart water transport，it systematically sorts out the standardization requirements in six dimensions：technical support，element realization，development goals，full life cycle，all factors，and all scenarios.By identifying and integrating standardization requirements in all links of smart water transport，a logically clear，comprehensive and dynamically expandable framework for the standard system is established.By establishing a unified standard system，it can provide a basis for the formulation and revision of standardized documents related to the planning，construction，management，and evaluation of smart water transport in Guangdong Province.The construction approach and framework presented in this study offer a new theoretical tool and analytical approach for the development of standard systems，and can also provide theoretical reference and practical guidance for standardization work in related fields.
-
HUANG Xiaofu, LIN Guanghui, LIU Fagui, XIAO Yu, FENG Yutao, HUANG Shiyuan
2026(6):17-24
Abstract:
Deformation monitoring during the construction of large-scale water conservancy hubs is crucial for ensuring construction safety.However，long-term on-site deformation monitoring is difficult to carry out due to limitations in site conditions and monitoring scope.To address this issue，taking the Madao Hub of the Pinglu Canal as an example，we extract the time-series deformation fields of the channel and slopes at the Madao Hub by combining pixel offset tracking and small baseline subset interferometric synthetic aperture radar(POT-SBAS InSAR)techniques.The results indicate that the deformation in the azimuth(Azi)direction at the Madao Hub is significantly greater than that in the line of sight(LOS)direction.The deformation range in the Azi direction is from -450 to 1,650 mm，while in the LOS direction，it is from -550 to 650 mm. The deformation of the western slope of the Madao Hub is notably higher than that of the eastern slope，highlighting the need for enhanced deformation monitoring of the western slope under heavy rainfall or extreme climate conditions in the future.As the highest slope along the Pinglu Canal，Slope No.2 exhibits better stability compared to the other four slopes，which may be attributed to the use of anti-slide piles and prestressed anchor cable grid beam slope protection.The POT-SBAS technology demonstrates certain advantages and potential in the deformation monitoring of channel hubs，providing insights for geological disaster risk prevention and monitoring along the Pinglu Canal project.
-
SONG Zhenning, JIANG Xingliang, GAO Chengyan
2026(6):25-32
Abstract:
The challenges exist in the foundation pit drainage design of shipping hub projects in mountain-crossing sections，including large catchment area of foundation pit，lack of measured runoff data，absence of adjacent construction diversion channels，insufficient specification basis，and mature referable research results.Taking the foundation pit drainage scheme of the Madao navigation hydro-junction of the Pinglu Canal as an example，we use theoretical analysis and quantitative calculation methods to conduct a study on catchment zoning methods，runoff calculation，and drainage schemes.The results show that the design rainfall intensity and catchment runoff can be derived from historical rainstorm data.Through hierarchical arrangement of drainage facilities and zonal layout of water-retaining cofferdams，the built construction drainage system of“high water discharged at high points，low water pumped out，zonal regulation，and staggered peak diversion”and emergency response strategies for excessive rainstorms，has met the expected goals of being designed for a 20-year return period rainstorm intensity and checked for a 50-year return period rainstorm intensity，as verified by rainstorms during the 3-year construction period.The methods for determining drainage standards，zonal runoff，and the construction drainage system can provide a reference for formulating foundation pit drainage schemes for shipping hub projects in mountain-crossing sections and offer reference value for the revision of the Code for Construction of Shiplock Engineering.
-
ZHU Yesen, SHEN Yusheng, HU Baowen, SUN Zhongbin, HU Jianke
2026(6):33-41
Abstract:
The wave damping characteristics of the pontoon-plate type floating breakwater are more complex than that of the single-pontoon type.We investigate the influence law of wave type，number of vertical plates，and plate inclination angle on the wave damping characteristics of a pontoon-plate type floating breakwater through 2D wave flume experiments.The results indicate that under moderate relative widths(0.25-0.33)，significant differences are observed in the wave energy dissipation coefficient and wave transmission coefficient of the single-pontoon type floating breakwater under regular and irregular waves.Compared to the configuration without vertical plates，adding a single central vertical plate beneath the pontoon cannot significantly improve wave damping characteristics.However，installing two vertical plates on both sides of the pontoon bottom or three vertical plates across the bottom notably improves the wave damping performance within the relative width range of 0.20-0.33.For larger relative widths(0.33-0.48)，the wave transmission coefficient increases with the plate inclination angle(0°-65°)，and vertical plates(0°)demonstrate superior performance.For smaller relative widths(0.20-0.25)，the transmission coefficient first decreases and then increases with increasing inclination，with 25° inclined plates performing optimally.The 65° inclined plates yield the poorest wave damping effect across all tested relative widths.Therefore，to achieve optimal wave damping，the inclination angle of the plates on both sides of the pontoon should be determined comprehensively on the basis of the relative width corresponding to the representative wavelength of the design sea conditions.
-
2026(6):42-50
Abstract:
Facing the dual challenges of difficult dredged sediment disposal and shortage of construction materials in China，based on extensive engineering practice，several technologies for large-scale resource utilization of dredged sediments and their application advances are introduced.To tackle the construction challenge of low efficiency in drainage consolidation for large-area ultra-soft soil foundations in land reclamation，two dynamic-static combined drainage consolidation rapid reinforcement technologies are proposed.These technologies effectively accelerate the dissipation of excess pore water pressure and can shorten the consolidation period by one-third compared with conventional methods.Furthermore，the pioneer plant solidification technology for ecological agricultural reclamation of dredged sediment and the chemical modification for construction materials technology for transforming dredged sludge into usable building materials are elaborated.To efficiently treat dredged soil with high water content and low strength，pneumatic flow tube mixing technology is proposed.This technology is energy-saving and environmentally friendly，enables continuous offshore operation，and provides a new large-volume soil improvement scheme for land formation of large-scale artificial islands.The technological system solves the problems of resource utilization of dredged soil in the processes ranging from rapid foundation treatment and ecological restoration to material conversion，forming a complete solution.
-
2026(6):51-58
Abstract:
To address safety concerns such as broken mooring lines and collisions during mooring and against typhoon process for unpowered repairing and building vessels in port，a specialised study on mooring against typhoon safety for large unpowered repairing and building vessels in port has been conducted.Based on the 300,000 DWT outfitting berth project at Pacific Ocean Engineering(Zhoushan)Co.,Ltd.within the Ma’ao Port Area of Ningbo-Zhoushan Port，and summarizing the experience of multiple shipping companies in mooring against typhoon，standardised mooring and against typhoon schemes have been configured for 150,000 DWT container vessels and 300,000 DWT oil tankers.These solutions utilise 24 mooring lines with a minimum breaking load of 1,200 kN.Utilising standardised theoretical calculations and simulation analysis methods，the mooring forces under various wind，wave，and current combinations are assessed.The results show that under the conditions of wind force of level 11 and gusts of level 12-13，the maximum mooring forces for both the 150,000 DWT container vessel and the 300,000 DWT oil tanker remained below the minimum breaking load of mooring lines.Existing terminal facilities thus meet typhoon defence requirements.The proposed mooring scheme has good operability and reliability.This research provides quantitative safety assessment criteria for large unpowered vessels in adjacent port areas，offering practical value for enhancing typhoon safety assurance and management capabilities within the port.
-
LIU Guobao, SHEN Shumao, CAO Anqi
2026(6):59-65
Abstract:
To address the challenges posed by the substantial volume of waterborne operations at the pile-supported wharf’s rear platform，the high number of prefabricated components requiring installation，and the significant hazards faced by workers，a prefabricated T-beam structural system is proposed according to the platform’s characteristics，such as relatively low horizontal loads，absence of equipment tracks，and minimal subsurface utility trenches and manholes.On the basis of the application case of container terminal phase II project of Luojing port area in Shanghai，the research is conducted on structural calculations，node detailing，and construction methods.Through software calculation and cost estimation，findings are obtained regarding stress characteristics，structural technical and economic advantages，and directions for further optimisation.The results show that the prefabricated T-beam structural system for the rear platform employs well-established construction methods across all processes.T-beams may be calculated as composite members，exhibiting internal forces characterised by principal stresses exceeding longitudinal stresses.Stress concentration occurs at the web position of the upper flange，with localised forces from individual beams transferring to adjacent members.The structural scheme requires fewer prefabricated and installed components than conventional beam-slab solutions，enabling safer and more efficient construction operations.It demonstrates greater competitiveness when supported by prefabrication facilities and large-scale lifting equipment.Subsequent research could explore adopting prestressed T-beams，potentially achieving further investment savings of approximately 15%.
-
2026(6):66-73
Abstract:
Aiming at the problems of mutual influence between the two berths of a dual-berth LNG(liquefied natural gas)terminal and the coordination of construction and operation，this study takes the dual-berth LNG terminal of the Tianjin LNG Project as an example，and conducts research on the key design points of the second berth constructed in the later stage，including plane layout，berth unloading capacity，hydraulic structure，and environmental protection.Model test methods including tidal current and sediment transport，wave cross-section and ship maneuvering simulation are employed to conduct layout analysis and demonstration.Combined with the scheduling of LNG vessels entering and departing the port，the berth unloading capacity is comprehensively calculated.The results show that the two berths are arranged adjacently at a certain angle and share a turning basin，reducing the harbor basin dredging volume by approximately 4 million cubic meters.The comprehensive loading and unloading capacity of the dual berths reaches 11.65 million tons per year.By increasing the pile diameter and reducing the number of pile foundations，and adopting a framed paired-pile layout to optimize the hydraulic structure，the construction period can be shortened by approximately one month.The monthly frequency of LNG vessel unloading increases from 8-11 to 13-15 ships.The intensive layout of dual berths can save natural shoreline resources，reduce ecological impact，meet the project’s overall LNG unloading capacity requirement of 10.8 million tons per year，and can provide reference for the design of similar dual-berth LNG terminal.
-
2026(6):74-81
Abstract:
In recent years，the domestic cruise tourism market has flourished，especially the popularity of the Three Gorges of the Yangtze River has continued to rise.However，the electrical engineering design of inland cruise terminal still faces technical challenges such as intelligence and low carbonization.Taking a cruise terminal project in Chongqing as an example，aiming at the multi and berth cruise inland terminal composed of vertical shore base and upper corridor building with large water level difference，which has hydrological characteristics of large water level difference and complicated boarding and disembarking equipment system for vertical transportation of passengers with large water level difference.This paper systematically discusses the electrical engineering design from the aspects of overall power supply system，fire fighting system，lighting，shore power engineering，digital intelligence and so on.This paper puts forward a power supply system scheme with independent substations according to berths，as well as an improved fire emergency evacuation lighting system.BIM technology is used to coordinate the comprehensive management，a large water level difference cruise ship shore power system and shore power management system with independent power supply are constructed.A digital system that combines intelligent operation and maintenance is also built.This paper focuses on the application of key technologies such as digital intelligence technology，green and low-carbon design and cruise ship shore power，providing reference for similar projects.
-
JIANG Qi, JI Chao, YANG Changyi, CUI Guanchen, LI Jiaojiao
2026(6):82-91
Abstract:
Finite element modeling plays a crucial role in engineering design by simulating the mechanical behavior of structures under complex loading conditions，thus providing a scientific basis for design and structural optimization.Port engineering structures are characterized by diverse dimensions and complex load conditions.The use of traditional graphical user interfaces for finite element modeling is often cumbersome and inefficient，whereas script-based modeling demands high programming proficiency，resulting in a high application threshold.To address the above two challenges，this paper proposes an automated modeling method integrating the semantic parsing capability of large language models，and establishes a complete modeling framework covering natural language input，semantic parsing，parameter validation，model generation and execution.By extracting modeling information from user-provided natural language descriptions，the method automatically generates executable scripts，enabling rapid model development and finite element analysis across various scenarios.Evaluations conducted on representative wharf engineering applications demonstrate that the proposed method improves modeling efficiency by approximately 83% while maintaining accuracy and enhancing user-friendliness. This approach offers a novel pathway to intelligent finite element simulation processes.
-
PAN Jingchen, ZHENG Weixi, MA Ming
2026(6):92-102
Abstract:
To evaluate the impact of large-vessel collisions on the structural integrity of deep-water pile-supported wharves，a three-dimensional finite element model is established for a typical high-pile wharf with a pile diameter of 1.2 m and a pile length of 71 m，incorporating tubular piles，transverse beams，mooring components，and a rubber fender system.Dynamic explicit simulations are performed under multiple conditions，covering collision velocities of 1-4 kn and considering both perpendicular and yawing rotational impacts in the horizontal plane.The analysis focused on structural dynamic responses，stress distribution，and failure evolution.Results indicate that the difference in pile head displacement between the pile-soil equivalent spring model and the explicit soil model is less than 5%，which significantly reduces the number of elements while ensuring computational accuracy.In perpendicular collisions，displacement increases sharply after fender failure，and stress concentrates at the pile head and beam-pile joints.In yawing rotational collisions，tangential slip induces shear-torsional effects，leading to asymmetric failure.Based on the relationship between impact kinetic energy and structural response for ships of various tonnages，a ship tonnage-critical impact velocity relationship derived from kinetic energy equivalence is proposed，which provides a reference for the selection of design ships and safety assessment of deep-water pile-supported wharves under accidental collision conditions.
-
YIN Binyong, ZENG Haiyan, WEN Yueling, HE Baiwu, HE Yuping, WANG Xinshuai
2026(6):103-110
Abstract:
The challenges of tight water level restrictions，difficult lock chamber dewatering，and significant vessel congestion exist during maintenance at the Changsha Hub ship lock.Aiming at the problem of how to scientifically select the maintenance time for the ship lock，on the basis of historical maintenance records of the ship lock，we examine the selection factors influencing maintenance timing，including water level requirements for maintenance，vessel transit demand，and ship lock chamber dewatering requirements.We conduct research and analysis，employing inductive and statistical methods to identify patterns within the data.The results show that principles for selecting ship lock maintenance timing：the primary principle is to prioritize the effectiveness of ship lock maintenance while minimizing the number of vessels waiting.The analysis based on three factors including water-level requirements，vessel transit demand，and ship lock chamber dewatering requirements align with both practical and theoretical requirements.Among these，the issue of water leakage through structural joints，which falls under ship lock chamber drainage requirements，is often overlooked during maintenance planning and deserves greater attention.On the basis of the above principles and analysis of the three factors，the optimal period for maintenance at the Changsha Hub ship lock is September，and October，with earlier implementation within this window being preferable.
-
XIONG Rui, JIANG Xingliang, LIU Jianchao
2026(6):111-118
Abstract:
To address the lack of an evaluation index system and weight assignment method in the comparison and selection of plane layout schemes for ship lock reconstruction and expansion projects，this study takes the Weishan Third-line Ship Lock project as a case study.By analyzing complex environmental constraints such as coal mining subsidence areas in the project site and the impact on the safe operation of existing facilities，the principles for ship lock site selection and plane layout are proposed，and three feasible plane layout schemes are formulated.After screening the key factors for scheme comparison,the recommended scheme is determined using conventional demonstration methods.The analytic hierarchy process(AHP)is adopted to establish an evaluation index system consisting of 10 indicators covering safety performance，navigation efficiency，economic cost，ecological environmental protection，and other aspects.Quantitative scoring is applied to obtain the comprehensive score，and the recommended scheme derived from both methods is consistent.Model test verification shows that the flow conditions at the lock approach area of the recommended scheme meet the specification requirements under various combined working conditions，indicating that AHP can be applied to the scheme evaluation of ship lock expansion projects.The proposed plane layout principles，scheme formulation ideas，and comparison methods can provide valuable references for the demonstration of plane layout schemes in similar ship lock reconstruction and expansion projects.
-
CHEN Zhongsheng, LIU Xiaoqiang, WANG Wencheng
2026(6):119-124
Abstract:
Conventional empirical formulas for calculating the stress in the spherical bearing of a mitre gate’s bottom pivot often produce overly conservative results，which contradicts the observed satisfactory performance of some spherical bearings in real projects despite calculated stresses exceeding the allowable value.After analyzing the limitations of these formulas in accounting for material properties，structural dimensions，and load-bearing area，we employ Inventor software to simulate the Mises equivalent stress distribution under three contact conditions：full-contact，partial-contact，and zero-contact between the spherical bearing and the pivot head.The results indicate that while the empirical formula calculation for a spherical bearing in a domestic ship lock A exceeds the allowable stress by 26.5%，all three finite element analysis(FEA)models meet the code requirements，with stress values equivalent to only 11.4%，16.3%，and 34.1% of the empirical result，or 14.5%，20.6%，and 43.2% of the allowable stress，respectively.This confirms a substantial safety margin for the spherical bearing.The full-contact condition is overly ideal and impractical，whereas the partial-contact model exhibits some distortion due to boundary constraints.In contrast，the zero-contact model reasonably accounts for stress distribution under extreme conditions，features well-defined boundaries，and is practical for widespread application.Therefore，the zero-contact method is recommended as the preferred approach for the verification of spherical bearings.
-
2026(6):125-132
Abstract:
To overcome the terrain constraints and complex flow conditions associated with single intermediate channels in mountainous areas，the double-channel layout is adopted as a solution.Investigating a 1,400 m long intermediate channel，a validated 2D numerical model is used to study the hydraulic characteristics of the double-channel system under different channel types，initial water depths and channel lengths，thereby revealing its flow evolution patterns.The results show that when the initial water depth increases from 3 to 5 m，the maximum gradient of the three channel width types decreases by about 50%，and the maximum flow velocity decreases by approximately 26%.After changing a 40 m-wide channel from a single to a double layout，the flow propagation velocity slows down.In a channel that is 1,400 m long and 40 m wide，1,500 s after water release，the phase difference reaches 50 s.Meanwhile，the average maximum gradient increases from 1.30% to 1.47%，and the average maximum flow velocity increases by 0.21 m/s.When the channel length is extended from 1，400 to 3,000 m，it smooths the fluctuation process in the double intermediate channel—within 3,600 s，the number of wave peaks decreases from 8 to 3.No clear correlation is observed with the maximum gradient or maximum flow velocity in the channel.
-
2026(6):133-138
Abstract:
A feasibility study is conducted on the opening of the left channel as a public one-way channel in response to the difficulty of channel resource allocation caused by the narrowing of the right channel width and the continuous development of the left channel in the lower reaches of the Yangtze River.On the basis of the underwater terrain data of the waterway from 2019 to 2024 and the 10-year hydrological data of Jiujiang water level station，the feasibility of dual channel collaborative utilization is systematically studied using river regime evolution analysis，navigation standard calculation，and safety assessment methods for regulating buildings.The results indicate that since the completion of the 6m deep channel regulation project from Wuhan to Anqing in 2019，the width of the 5-meter isobath in the left channel has stabilized at over 400 m，and the riverbed shape has tended to be balanced.On the basis of a 98% guarantee rate，the staged navigation water level is 1.31 m during the dry season，2.64 m during the mid water season，and 5.18 m during the flood season.A one-way channel scheme represented by 5,000 DWT inland bulk carriers is proposed，with a maintenance scale of water depth of 4.5 m，width of 150 m，and minimum bending radius of 1,050 m.It is predicted that the opening of the left channel can improve the navigation capacity of the Madang River section by about 30%，but it is necessary to optimize the engineering design of the Madangzui connection section through special research.
-
WU Fengjian, WEN Bohao, HUANG Chengbing
2026(6):139-145
Abstract:
To the constraints of complex boundary conditions such as surrounding buildings and the difficulty of effectively utilizing existing ship locks when carrying out double line ship lock reconstruction and expansion projects relying on existing ship locks.A comparative study is conducted on the overall layout schemes based on the utilizing existing ship locks.Through comprehensive analysis of factors such as the lock position，dam axis，main lock structure layout，utilization of existing ship lock，approach channel dimensions，and lock chamber zones，the overall layout plan for the right bank lock position and the main lock structure located below the dam axis is determined.The overall layout plan for the renovation and expansion of the double line ship lock should be comprehensively considered from the aspects of navigation conditions，flood control impact，land acquisition and relocation，construction period impact，water system adjustment，and project cost.In the subsequent implementation，full consideration should be given to the actual situation of the project，existing resources should be utilized to the maximum extent，project costs should be effectively controlled，and the construction feasibility and operation and maintenance convenience of the entire life cycle should be balanced.Under the condition of limited boundary conditions，the research results can provide a basis and reference for the overall layout of the reconstruction and expansion of the double-line ship lock based on existing ship lock.
-
LIN Di, GUO Xiaoshan, WU Zhihua, ZHU Danhe
2026(6):146-152
Abstract:
In the evidence collection and on-site inspection of waterway administrative law enforcement，it is necessary to measure the length of occupied shorelines and the scope of waterway occupation as the basis for penalties.When surveying curved shorelines and winding waterways，the existing RTK（real time kinematic）measurement method or aerial photogrammetry method have shortcomings such as low efficiency and high cost，making it difficult to achieve efficient survey in practical work.To address the above issues，based on consumer UAV triangulation measurement technology，a combined triangulation measurement technology has been creatively developed and successfully applied in actual measurement cases.The test results show that this method can effectively solve the problem of lacking suitable instruments and methods for rapid and low-cost measurement and determination of the length of curved shorelines and ships occupying winding waterways.The technical method of the research result can be realized with a thousand-yuan level consumer UAV，without the need for subsequent indoor data processing.Through simple calculations，the measurement results can be quickly obtained on-site during field operations，providing a new，high-efficiency and low-cost method for waterway law enforcement and waterway management.
-
ZHU Guojuan, WANG Fei, WANG Lan, WANG Xianmei, WANG Yuhong, KANG Ting, YAN Pu
2026(6):153-159
Abstract:
Based on the channel dredging project in the southern Jiangsu section of the Beijing-Hangzhou Grand Canal，a mathematical model is used to predict the variation characteristics of water level and discharge before and after dredging，as well as the diffusion characteristics of pollutants produced by dredging under changes in hydrological conditions and constructionintensity.The results show that after dredging，the flow velocity of the river channel do not change significantly，while the discharge increases substantially，which is conducive to the dispersion and dilution of pollutants.The diffusion distances where the concentration increments of suspended particulate matter，permanganate index，ammonia nitrogen，and total phosphorus exceed 20% of the water quality standards are 304-1 020，245-722，274-542，and 282-810 m，respectively.Low-intensity construction operations during the dry season can significantly reduce the diffusion range of pollutants.Compared with downstream construction，counterflow construction results in a notably smaller diffusion range of pollutants，but it is prone to causing silting in the waterway.During the normal flow period，the upstream area generally exhibits a larger pollutant diffusion range than the downstream area due to higher flow velocity and higher content of fine sediment particles.During the dry season，the weak advection transport capacity of pollutants leads to minimal differences between different areas.The concentration increment of pollutants generated by dredging declined over time after the completion of construction，approaching zero within 3 h，indicating a relatively short impact duration.These findings provide a basis for the rational formulation of water environmental protection measures.
-
PENG Bishuai, GUO Qi, ZHANG Wenjiang
2026(6):160-166
Abstract:
Aiming at the problems of traditional water surface velocity measurement methods(e.g.,buoy method，acoustic Doppler current profiler)like difficult deployment and limited spatial coverage in complex and adverse flow regimes,as well as unstable feature point tracking and insufficient velocity conversion accuracy in existing UAV-based flow measurement technologies，this study develops a non-contact surface flow field measurement technology.High-resolution aerial videos are acquired using a UAV，and a geometric mapping model is established with parameters including flight altitude and camera focal length to calculate the Ground Sampling Distance(GSD).A multi-source feature fusion detection strategy is proposed，namely “Shi-Tomasi corner detection as the primary method，with SIFT and ORB employed as supplements when necessary”.The Lucas-Kanade sparse optical flow algorithm is implemented in OpenCV to track water surface feature points.Delaunay triangulation and multi-frame averaging are adopted to reconstruct the continuous flow field from the sparse particle field，and multi-video stitching is achieved through geographic coordinate registration.Application in Fuling-Fengdu reach of the upper Yangtze River shows that this technology can effectively identify adverse flow regimes such as bubble vortices and cross currents.Compared with the measured data obtained by the buoy method，the average velocity error is controlled within ±7%.This technology can provide ideas for solving the flow measurement problem in mountainous rapid and dangerous shoal areas，and offer reliable data support for preliminary reconnaissance of waterway regulation and quantitative evaluation of adverse flow regimes.
-
2026(6):167-175
Abstract:
Currently，the inspection of navigation aids is mainly conducted on-site by maintenance personnel，which has issues such as low efficiency，high resource consumption，and long inspection cycles.In response，an automatic inspection method for Yangtze River navigation aids based on computer vision is proposed.First，real-time images of the navigation aids are obtained using devices such as cameras and drones.Next，an improved MobileNetV3 model with coordinate attention is used for navigation aids image detection.Then，navigation aids image preprocessing method is designed to allow the model to capture more features of the navigation aids images，thereby further improving detection accuracy.Finally，a navigation aids dataset is created for model training and testing.The experiments show that the improved model achieves accuracies of 98.35%，95.76%，and 95.12% on three datasets of cylindrical，conical，and can-shaped navigation aids datasets，respectively，which are improvements of 3.56，2.07，and 1.57 percentage points over the original model，indicating that the model improvements are effective.On the test set，the model detection accuracies reach 98.76%，95.49%，and 95.14%，indicating that the automatic inspection method for Yangtze River navigation aids performs well in detecting abnormal navigation aids.
-
ZHOU Shiguang, SHAO Minqiang, JING Congcong, CHENG Yujiao
2026(6):176-184
Abstract:
To address the shortage of port land area structural component libraries for domestic BIM platforms，this study analyzes the framework logic and functional characteristics of family libraries on the mainstream Revit platform，compares the technical stacks and adaptability of domestic BIM platforms，and finally determines to develop the component library based on BIMBase and the CCCC Transportation BIM Base(NeXus)system.According to the functional characteristics of secondary development on domestic BIM platforms，a hybrid development mode using Python，C#，and C++ is determined.A domestic BIM component library is successfully developed，which contains a variety of parametric BFA components created with Python，including piles，foundations，wells，trenches，embankments，encapsulations，pipelines，signs，and markings.With the component library as the core support，multiple BIM design applications are carried out，including quantity statistics，material library and BIM coding implementation，which fully demonstrate the practical engineering value of BIM technology.Additionally，the construction methodology and technical route of the component library formed by this research provide a feasible reference for future port-related software development.The achievements have also made positive contributions to enriching the ecosystem of domestic BIM platforms and boosting technological upgrading of the industry.
-
CAO Huafeng, SHUI Yi, ZHOU Yanbin, ZHU Yiyang, PENG Yao
2026(6):185-191
Abstract:
In a pile test project for waterway engineering in the Jiujiang area，to determine the shaft friction transfer coefficients of different soil types in self-balanced static load tests，both self-balanced tests and traditional kentledge static load tests are carried out on cast-in-place piles in the same region.A nonlinear optimization algorithm is adopted to perform least squares fitting on the discrete load-displacement data points obtained from the two test methods.The sum of squared distances between data sets obtained from the two test methods is taken as the loss function.Using the Levenberg-Marquardt(L-M)algorithm，the shaft friction conversion coefficients of cohesive soil layers(γc)and sandy soil layers(γs)are determined as 0.60-0.73 and 0.35-0.56，respectively.The established regional shaft friction transfer coefficients provide more accurate and localized parameter references for the design of pile foundations in waterway engineering projects in the Jiujiang area.Additionally，the fitting method based on the Levenberg-Marquardt(L-M)algorithm offers an effective analytical approach for the comparison and conversion between self-balanced test data and traditional static load test results，thereby enhancing the accuracy and reliability of test data processing.
-
2026(6):192-201
Abstract:
Aiming at the high discreteness of blow counts caused by the granular and finite-body characteristics of stone columns，as well as the applicability issues of traditional rod length correction methods，this study develops a more scientific and robust method for data processing and rod length correction.Field dynamic penetration tests are carried out based on a hydrotechnical project in Zhoushan，Zhejiang Province.It is proposed that the median value of a set of(number of test piles≥5)test data be used as the regional representative value to improve data robustness，which is verified by the Wilcoxon signed-rank test.Emphasis is placed on comparing the dual-factor correction method specified in GB 50021—2001 Code for Investigation of Geotechnical Engineering with the single rod length correction method based on Newton’s collision theory，and the Spearman’s rank correlation coefficient(ρ)is used to quantitatively evaluate the trend rationality of the corrected data.Statistical tests demonstrate that the median method exhibits significantly stronger robustness against outliers than the mean method(significance probability p＜0.001).Comparative analysis shows that the dual-factor correction method leads to over-correction，causing the corrected curve to deviate from the physical law that compactness increases with confining pressure(ρ≈0.23).In contrast，the single rod-length correction method preserves the trend of increasing blow count with depth(ρ＞0.94),aligning well with physical principles.It is recommended that the single rod-length correction method based on the statistical median be adopted in dynamic penetration tests for stone columns.This method can effectively suppress data variability，ensure reasonable trends，and provide a more reliable basis for quality evaluation in engineering practice.
-
2026(6):202-207
Abstract:
A refined design method is studied for the treatment of deep soft foundation with significantly uneven spatial distribution.Based on the Civil3D platform，a three-dimensional geological model is constructed，combined with element mesh generation and consolidation settlement calculation method based on stress path.A refined design scheme is carried out for the deep soft foundation treatment project of the Pasay reclamation development project in the Philippines.The site is divided into nearly 400 element meshes of 100 m×100 m，and the soft soil distribution in the element meshe is relatively uniform.According to the decreasing thickness of the soft soil，the spacing between the prefabricated vertieal drain(PVD)is selected from 1.3 to 2.0 m，and the surcharge height range from 1.5 to 8.5 m.After 7 months of full-load preloading，the design standard of residual settlement not exceeding 30 cm is met.Compared with the original design scheme，the refined design scheme saves over 3 million m3 of surcharge sand(accounting for 17%)and reduces the depth of PVD installation by over 30 million m(accounting for 41%).Research has shown that for similar deep soft foundation treatment projects，the uneven spatial distribution characteristics of soft soil should be fully considered，and refined design methods should be adopted to effectively improve the pertinence and accuracy of the design scheme，ultimately optimizing the construction efficiency and reducing the project cost.
-
LIU Junjie, LEI Zhenhai, WU Teng, ZHOU Huipeng, CHEN Dong, SONG Dewei, SUN Yang
2026(6):208-216
Abstract:
To address the issues of unclear deformation control mechanisms of deep foundation pit support structures and the lack of systematic quantitative analysis of multi-parameter synergistic effects in ship lock expansion projects，this study takes the Huaiyin No.2 Ship Lock expansion project as the background to conduct a refined investigation on the factors influencing the deformation of combined support structures.A three-dimensional structural model of diaphragm walls，prestressed anchor cables，and steel supports is established，and its reliability is validated using field monitoring data.Combined with single-factor analysis and the grey relational analysis method，the influence patterns of five key parameters-concrete strength，support wall thickness，embedment depth，anchor cable prestress，and installation angle-on support deformation are systematically quantified.The results show that among the five parameters，anchor cable prestress has the most significant control effect on support deformation，followed by support wall thickness.When the anchor cable prestress is increased from 150 to 200 kN，the displacement at the top of the support can be reduced by 1.8 mm，while the effect of concrete strength on deformation suppression tends to stabilize after exceeding C35.This study reveals the dominant factors controlling support deformation under multi-parameter coupling and provides a quantitative basis for the optimal design of ship lock foundation pit support parameters under similar geological conditions.
-
ZHANG Kai, GU Kuanhai, ZHOU Xuan, CHEN Meng
2026(6):217-223
Abstract:
Aiming at the technical challenges of designing cofferdams in the environment of alternating soft soil-rock foundation and significant tidal wave action on islands，a key technical study on the double row cast-in-place pile composite cofferdam system is carried out based on a 300，000 DWT shipyard project.By combining theoretical analysis，numerical simulation，and engineering practice，an integrated collaborative force structure of“pile beam plate”is proposed，and an innovative composite water stop system of“high-pressure rotary jet pile curtain+steel plate continuous air sealing”is integrated.The simulation calculation and stability analysis of the structure are carried out using PLAXIS three-dimensional finite element method and the Qimingxing software FRWS8.2.The results show that the optimized double row pile cofferdam has a safety factor against overturning of 2.05-2.72，which is much higher than the limit value of 1.2 specified in the specifications.The maximum horizontal displacement is controlled within 35.0 mm，meeting the requirements of deformation control.The integrated composite structure of “pile beam slab” effectively coordinates soft soil deformation constraints and rock foundation anchoring through stiffness coordination and spatial truss effect，significantly improving the overall stability and anti-seepage performance of the cofferdam under complex hydrogeological conditions，providing theoretical basis and practical technical reference for cofferdam engineering in similar complex geological environments.
-
ZHANG Wei, ZHU Mingxing, XU Xiong, ZHAN Zhengping, WEN Youpeng
2026(6):224-232
Abstract:
To clarify the minor-disturbance control principle of four-axis mixing pile construction and quantitatively evaluate the impact of four-axis mixing pile construction on the disturbance of surrounding soil，we carry out a field test of four-axis mixing pile construction based on a deep soft foundation reinforcement project at a port in Dongguan.The results show that the application of minor-disturbance four-axis mixing pile technology for large-area deep soft foundation reinforcement offers high construction efficiency and can effectively shorten the reinforcement construction period.At the same distance from the pile center，the peak value of the average excess pore water pressure(EPWP)of the surrounding soil induced by construction generally increases with depth，while at the same depth，the peak EPWP decreases as the distance from the pile center increases.Within a radial distance of 1.5D-7.0D(where D is the diameter of a single pile)，the average peak EPWP ratio generated during construction varies from 0.04 to 0.44.At a given depth，the EPWP ratio generally exhibits a decreasing trend with increasing distance from the pile center.During the entire construction process，most of the surrounding soil within a radial distance of 4.0D suffered slight or no disturbance，while the soil beyond 4.0D is almost undisturbed or only slightly disturbed.
-
WANG Zhengping, DU Mengjie, LIU Yuanxun
2026(6):233-242
Abstract:
To address the issues of“kick-out”deformation and stability control in traditional double-row steel sheet pile cofferdams under the working conditions of soft ground and high water head，we research and develop a new type of double-row steel sheet pile cofferdam structure with underwater opposite tension.By converting part of the horizontal earth pressure into the axial tension of steel cables，this structure realizes a transformation in the mechanical mechanism from passive pressure bearing to active control.We carry out numerical simulations based on the Macau Inner Port tidal barrier project and parameter sensitivity analysis.The results show that compared with the traditional scheme(F0 scheme)，the new cofferdam(F1 scheme)reduces the maximum displacement of the pile body by approximately 12% and achieves a more uniform internal force distribution.The insertion depth of steel sheet piles and the width of the cofferdam are the two key geometric parameters controlling the stability of the cofferdam，with their influence mechanisms being opposite；the internal friction angle of the foundation is the dominant geotechnical parameter.A stress-displacement response surface model is established with a goodness of fit of over 0.91，and the optimization scheme based on this model can reduce the cost by 30%-40%.This technology has both significant technical advantages and economic feasibility in soft ground and high water head projects.
2026 Issue 6
The 15th Five-Year Plan for Water Transport Development and Policies
Perspective
Comprehensive
Port
Waterway and Navigation Strucure
Information Technology
Ground and Foundation
Construction
-
XIE Libo, SU Lei, WANG Jianfeng, WANG Yuanxin, BI Jianwei, LING Xianzhang
2025(2):27-35
Abstract:
Wave is the main environmental load for pile-supported wharf (PSW) in deep water area.Investigating the dynamic response characteristics of PSW-seabed system under wave action is the basis of dynamic design for deep water port.In this paper,a 3D finite element model of wave-PSW-seabed is established by ADINA.Pore water pressure and acceleration of seabed around pile,deck displacement,as well as dynamic water pressure time history of pile shaft under wave action are obtained.The dynamic response characteristics of the PSW-seabed system are analyzed,and the influence of the changing wave period on the dynamic response of this system is discussed.The numerical simulation results show that:1) there is no cumulative effect on pore pressure around pile under wave action;2) Dynamic water pressure of middle pile is significantly greater than that of the side pile;3) Amplitudes of seabed pore pressure,seabed acceleration,and dynamic water pressure attenuate along the wave propagation,and the smaller wave period,the more significant the attenuation effect.The modeling technique involved in this study can provide reference for similar PSW numerical simulation under wave action,and the investigation results can provide support for dynamic design of PSW-seabed system.
-
LIU Lu, SHI Youren, LU Xiaodong, CAO Huijiang
2025(2):157-163
Abstract:
The riverway conditions of the Huangpu River are complicated with many river bends,while Lujiazui Bend owns the largest curvature together with the smallest turning radius of the waterway among all the river bends of Huangpu River.With the rapid growth of the number of navigable ships in the Huangpu River,the silting of the beach near the convex bank of the Lujiazui Bend has a certain influence on the safe navigation of passing ships in recent years.Viewing platforms,regarded as urban reception halls of Shanghai,are set along Luijiazui Bend.Adverse impacts will be resulted from safety incidents in case.Therefore,we analyze the hydrological and sediment characteristics of Lujiazui Bend of Huangpu River,and historical changes of river regime as well as navigation characteristics of ships and surrounding restrictions,and propose the waterway layout and regulation measures in Lujiazui.The results show that cutting and widening the convex bank shoals on the east side of Lujiazui can slove the narrow problem of navigable waters of the bend,and improve the bend navigation environment for ships.
-
ZHOU Jingxiang, PAN Haitao, CHEN Yongjian, YAN Qiang, WANG Yulong, WANG Chaoliang, ZHANG Zhisen, WANG Shuai
2025(2):9-16
Abstract:
Pinglu Canal is the key project of the Western Land-Sea New Corridor,and building an efficient,intelligent,green,and resilient canal is an important component of the construction of Pinglu Canal with high standard and high-quality.By planning the overall architecture of the smart canal and combining the characteristics and needs of the construction and operation management of Pinglu Canal,the smart construction and management system is proposed as a typical application scenario including “full process integration and coordination of construction and management,full cycle digital twin of progress management,full process simulation and regulation of quality management,all-around early warning and prevention of safety management,and full-link monitoring and early warning of green management”,as well as the typical application scenarios of the smart operation system,including “one-net efficient coordination of operation management,one-body seamless coordination and linkage of operation and dispatch,one-map scientific and intelligent management of locks and maintenance,one-click coordinated and connected emergency response,and one-station efficient and convenient logistics services”.Furthermore,we summarize the innovative technical features of the digital twin Pinglu Canal from five aspects of “full-factorial three-dimensional perception,full-process digital twin,full-process simulation and simulation,all-around intelligent services,and full-technology self-developed and controllable”,which can provide reference for the construction of similar smart port and navigation projects.
-
LIU Mingwei, ZHANG Siqi, WU Linjian, LI Huijiuyuan, DI Yutao, DAI Chuan
2025(2):51-62
Abstract:
To ensure the long-term operational safety of frame-structure vertical wharfs in inland waterways,it is crucial to conduct monitoring and inspection of their service performance.The placement and scheme of monitoring sensors directly affect the accuracy and reliability of monitoring results.Therefore,sensors should ideally be positioned within the structural load sensitive areas.However,due to the complexity of frame-structure vertical wharfs and the large number of load combinations,the locations and distributions of structural load sensitive areas under the most adverse load combinations remain unclear.To address this issue,this study,based on a large inland hub port,establishes a three-dimensional numerical simulation model of a frame-structure vertical wharf segment.By developing an algorithm to identify the most adverse load combinations for critical structural components,the most adverse load combinations for each component are determined.On this basis,the distribution patterns of load response points and the ranges of sensitive areas under the most adverse load combinations are identified by using finite element numerical simulation.The results indicate that under complex load combinations,steel components of frame-structure vertical wharfs exhibit greater load sensitivity compared to concrete components.The sensitive areas of steel components are primarily located at the junctions of high and low water levels and the cantilever ends of the front-row steel mooring structures.This study addresses issues such as redundancy and ineffectiveness in monitoring point placement,providing a theoretical basis for the deployment of monitoring sensors in inland hub port wharfs.
-
CHENG Lixing, GU Yong, LIANG Xin, HAO Yuchi
2025(2):184-190
Abstract:
Scour protection is one of the important issues that need to be faced in the design and maintenance of dock pile foundations.This article explores the feasibility of using solidified soil for pile foundation erosion protection,that is,using engineering construction soil to add suitable solidification agents to form solidified soil,covering the scouring area of bridge piers in an appropriate way,enhancing the anti erosion performance of the bed surface,and thus playing a protective role.This article conducted targeted physical model experiments and numerical simulations on the flowability,shear strength,and erosion resistance of different solidified soil formulations.The experimental results show that the collapse diameter of solidified soil increases with the increase of soil to water ratio,and the fluidity of solidified soil decreases rapidly with time.The shear strength of solidified soil slowly increases over time,and as the ash to soil ratio increases,the strength of solidified soil will also increase accordingly.The overall resistance of solidified soil to water flow erosion is good,and it can be used as a new type of erosion protection material.In underwater environments,the strength of solidified soil also increases over time,and its durability is good.
-
YAO Hongcheng, XU Yanwen, ZHANG Wei, JI Xiaomei, HUANG Liming, WANG Xiaoguang, WU Yao
2025(2):36-44
Abstract:
Tidal asymmetry exerts an influence on nearshore material transportation and geomorphic evolution.Based on the Delft 3D FM,a two-dimensional hydrodynamic model is employed to establish the tidal movement simulations of Lingding Bay under the conditions of 1 970 s,2 010 s and the 2016 governing guideline shoreline.The response of tidal asymmetry to the seaward advancement of the shoreline in this area is analyzed by combining the reconciliation analysis and the skewness calculation method.Furthermore,the mechanism underlying tidal asymmetry change is examined by analyzing the contribution of different tidal constituent combinations.The research results show that the tidal height asymmetry between spring and neap tides in Lingding Bay varies.The seaward advance of the shoreline strengthens the flood tide dominance in tidal asymmetry.The seaward extension of the shoreline increases the tidal amplitude of the shallow water components while reducing the amplitude of the astronomical components,concurrently accelerating the tidal wave propagation speed.The contribution of the astronomical tidal components to tidal asymmetry gradually decreases upstream,whereas the contribution of the shallow water tidal components gradually increases.
-
ZHU Zhengtao, JIANG Qingrong, HUANG Dong, LI Haibin, CHEN Xinchi
2025(2):72-80
Abstract:
Taking a dock project on the left bank of the Beijiang River as an example,the finite volume method is used to establish the one-dimensional hydrodynamic model for the 37.0 km long section of the Shaoguan (II) hydrological station to Mengli hydropower station,and the two-dimensional hydrodynamic model for the 4.6 km long section of the project.A quantitative study is conducted on the differences in flood level,flow velocity distribution,and flood storage capacity of river channels under different construction schemes.The results show that when the flood frequency ranges from once every 50 years to once every 10 years,the increment of flood level is lower than 0.02 m under different schemes.The changes in flow velocity and pattern are mainly concentrated in the local river section from 100 m upstream to 260 m downstream of the dock.However,the changes in high flow velocity areas of the river are relatively small,as well as the changes in the dynamic axis of the main channel.Meanwhile,the actual flood storage capacity of the river has increased under the action of dredging in the harbor.From the perspective of flood safety and cargo safety,scheme 2 is a recommended plan,and relevant research methods can provide scientific reference for similar dock construction plans.
-
XIE Yuxuan, WANG Guangsheng, YU Tong, GUAN Dawei
2025(2):17-26
Abstract:
The modern coastal protection systems place higher demands on the crest elevation and permeable of breakwaters.A three-dimensional numerical wave flume based on the Reynolds-averaged Navier-Stokes equations is established to investigate the wave force of submerged perforated semi-circular breakwaters under the action of shallow water waves.The results indicate that there is a phase difference between the horizontal and vertical forces acting on the submerged semi-circular breakwater,with the critical sliding moment generally corresponding to the moment of maximum shoreward horizontal force.As the perforation rate increases from 0% to 25%,the dimensionless maximum shoreward and seaward horizontal forces on the submerged semi-circular breakwater decrease by 27.8% and 39.8%,respectively.With decreasing wave period and increasing submergence depth,the seaward sliding force on the submerged semi-circular breakwater increases.Empirical formulas provide conservative estimates for the total force on unperforated semi-circular breakwaters under long-period waves and extreme submergence conditions,and further overestimate the wave forces on submerged perforated semi-circular breakwaters.
-
FU Xuhui, GONG Huiling, HE Jinglin, TANG Rongling, ZHANG Bo
2025(2):110-118
Abstract:
In recent years,with the rapid development of shipping economy,waterway regulation projects are frequent in the Yangtze River basin.Although waterway regulation projects can improve flow conditions,they also have a certain impact on fish habitat.To explore the impact of different waterway regulation projects on fish habitat,we take Luoqi Reach of the upper reaches of the Yangtze River as an example,and use numerical simulation method to compare and analyze the changes of habitat suitability of Four Major Chinese Carps before and after the waterway regulation project from the perspective of ecology and hydraulics.The results show that after the waterway regulation project,the very suitable area ratio of fish habitat increases by 1.21% at most,and the unsuitable area ratio decreases by 1.85% at most.Moreover,with the increase of water level and flow,the sub channel upstream of Luoqi will produce a suitable habitat environment for survival.
-
LIU Xiaobin, WU Xiaolei, WU Peng
2025(2):1-8
Abstract:
The Canal Economic Zone represents an economic form that tightly integrates shipping economy with regional economy,serving as a significant measure to provide shipping support for the country’s new development pattern of “dual circulation”.Addressing issues such as unclear definition of the Canal Economic Zone,insufficient theoretical foundation,unclear operational logic,and unsystematic overall understanding,this article proposes the connotative characteristics of the Canal Economic Zone and a canal-oriented economic zone system.By employing interdisciplinary research,qualitative analysis,and case study methods,it concludes that the core content of Canal Economic Zone planning is to comprehensively develop the regions along the canal,develop canal-related industrial systems,organize production factors around the canal,and guide the agglomeration of urban and rural populations,ultimately forming a banded territorial spatial layout.The research results show that Canal Economic Zone planning should focus on six key aspects:core industries,banded space,open mechanisms,green development,county economy,and government-enterprise cooperation,to establish a canal-oriented productivity organization and territorial spatial layout model.
-
2025(2):81-88
Abstract:
Among the four major systems in automated terminals- seaside loading and discharging,horizontal transportation,yard handling,landside collection and distribution-the yard handling system presents the greatest difference across terminals.The Chinese port industry continues to innovate in yard layouts,based on the “vertical layout + end interaction” mode and the “horizontal layout + gate control” mode,introducing innovative transfer modes as well as “vertical layout + U-shaped channel” design.Through data gathering from automated terminals with varied yard configurations that have been put into operation,this study analyzes the characteristics of different yard layouts in terms of key indicators such as safety,land utilization rate,operational efficiency,automation level and energy consumption per TEU.It explores the establishment of a comprehensive evaluation system for the layout of automated terminals,providing a thorough and impartial assessment of various layout patterns to guide the construction and operation of automated terminals.The study also discusses the yard layouts for currently envisioned automated terminals.The research results have reference value for the layout planning and design of new automated terminal yards and the automation upgrading or renovation of traditional terminals.
-
2025(2):164-171
Abstract:
After the 175 m water storage operation of the Three Gorges project,the scale of Jiulongpo to Chaotianmen reach cannot meet planning requirements.During the sedimentation period,the sediment is washed up and down,and the erosion is not timely,causing shallow navigation obstruction in the channel.The channel regulation of this reach is carried out from 2016 to 2020 to improve the channel scale of the engineering reach and curb the adverse development of channel conditions.After the completion of the project,the improvement effect is analyzed through regular observation.The results show that the river regime in the engineering reach is stable,the scale of the channel is significantly improved,and the unfavorable development trend is curbed,resulting in effective improvement of the channel conditions,achieving the goal of channel regulation.
-
Impact of Mujing first-lane ship lock discharge pattern on flow conditions in lower approach channel
WANG Zhaobing, GUO Tingting, ZHOU Xidong, HU Ruichang, YUAN Hao
2025(2):127-134
Abstract:
In the context of the double-lane ship locks sharing approach channel project,unsteady flow is prone to occur in the approach channel during lock discharge,causing turbulence in the flow field inside the approach channel,seriously affecting the safety of ship navigation and docking in the approach channel.Taking Mujing ship lock as an example,based on the RNG k-ε turbulent flow model,the navigation hydraulic characteristics of the approach channel are numerically simulated,and the unsteady navigation conditions inside the second-lane lock and the approach channel are analyzed during the discharge of the first-lane ship lock.The results show that when both sides of the first-lane ship lock release water simultaneously,the flow velocity in the approach channel does not meet the requirements of ship navigation and docking,and the formation of reflux,oblique and transverse flow patterns at the front of the separation dike of the second-lane ship lock affects the safety of ships entering and exiting the second-lane ship lock.After adopting the recommended side discharge method,the flow pattern in the approach channel has been improved,and the navigation flow conditions meet the requirements of safe navigation.The research results can provide a solution for the discharge method of double-lane ship locks.
-
LIU Zuofei, ZHU Binhua, FAN Shugang
2025(2):172-177
Abstract:
Research and practice on maintenance and dredging engineering are conducted to address the navigation obstacles faced by the Xiaziliang shoal section of the Three Gorges Reservoir’s variable backwater area during dry season,such as bends,narrowness,rapidity,and danger.It is found that the overall trend of this beach section is slow and continuous sedimentation by collecting a large amount of historical measured data and comparing and analyzing the changes in isobaths and erosion and sedimentation over the years.On the basis of the waterway conditions and water characteristics of this river section,the construction equipment and the water level are compared,and a reasonable maintenance and dredging plan is formulated.Implementation results of the project indicate that the maintenance and dredging project can improve the conditions of the waterway,expand navigable waters,and reduce the difficulty of ship operation,thereby ensuring the smoothness and safety of the waterway.
-
LIU Meimei, YING Zongquan, LI Jiamin, ZHAO Juan, LIANG Zihao
2025(2):45-50
Abstract:
To accurately evaluate the bending capacity of corroded reinforced concrete beam,we take three corroded reinforced concrete beams of prototype members as research objects,carry out the bearing capacity test and simulation analysis,and put forward a simplified calculation method for bearing capacity of corroded reinforced concrete beam with modified code.By using this method,the average cross-section corrosion ratio of all the steel bars in the same section can be converted from the corrosion ratio of one or several steel bars detected in the field,which can be used to calculate the strength utilization coefficient of the corroded steel bars,and solve the problem of inaccurate calculation of the bearing capacity when the cross-section corrosion ratio of the steel bar is greater than 10%.
-
SHANGGUAN Yifei, HE Jinchao, XIE Feng, YUAN Hao, ZHAO Jiang
2025(2):142-149
Abstract:
The Mangdantan channel,consisting of three continuous branches,locates in the middle and lower reaches of the Nujiang River with bad flow condition.To investigate the natural navigation obstruction characteristics in Mangdantan continuous branching channel,the influence of different discharges in normal and dry period on the flow diversion,gradient,water depth condition and current speed distribution are numerically analyzed by the two-dimensional planar hydrodynamic model.The results show that the natural navigation obstruction characteristics include large gradient,insufficient water depth and rapid current speed.In addition,the flow condition in the branches R1-L2-L3 is better than those in the branches R1-R2-L3,therefore the branches R1-L2-L3 are suggested to be developed as the navigation channel.The research results can provide technical support and theoretical guidance for the regulation of Mangdantan and the channel development of similar continuous branching rivers.
-
2025(2):150-156
Abstract:
In response to the comprehensive characteristics of multiple branching and large flow of the Heishazhou waterway,as well as the complex flow of the tidal river section in the lower reaches of the Yangtze River,the hydrological observation data are analyzed and summarized.Combined with the on-site practical work of the second phase of waterway regulation project construction,in-depth research is conducted on surface velocity and flow direction measurement,gradient observation,hydrological section measurement,etc.in hydrological observation.Modern new equipment and technology are used to optimize the layout of hydrological sections and water gauge positions,efficiently organize and implement,improve work efficiency,and obtain complete and detailed hydrological observation data.This method effectively solves the problems existing in the hydrological observation of the tidal reach of the lower reaches of the Yangtze River,and provides reliable basic data for the project design,construction and related thematic research.The research results can provide reference for similar projects.
-
ZHANG Qiyi, MENG Xiangfei, CHEN Kai, GUO Dongqi
2025(2):178-183
Abstract:
High pile structure is a kind of structure widely used in port and coast.Its dynamic response under wave action is the key factor to ensure the stable operation of the wharf.The software ABAQUS is used to build a three-dimensional wharf model and a wave flume with STAR-CCM+.The k-ε turbulence model and volume of fluid (VOF) motion interface tracking method are used to simulate waves,and the simulation of bidirectional coupling between wharf pile groups and waves is realized.Since the ratio of pile spacing to pile diameter is greater than 4,the interaction between piles does not need to be considered,and the error of the comparison model test is less than 5%,which can meet the requirements.The results show that the maximum force and displacement of the wharf pile groups under wave heights of 0.3 m,0.4 m,and 0.5 m can meet the code requirements.The displacement at the top of the pile is the largest,which is 0.66 mm.The maximum stress occurs at the bottom of the front row of piles in the pile group,which is 152.4 kPa.The concrete in the pile bottom area is prone to instability and failure,and special attention should be paid in practical engineering.
-
MENG Xiangyong, XUE Guodong, CAO Baojie, GAO Ruichao, MENG Xiankuo, WANG Hongwei, LIU Shixing
2025(2):191-196
Abstract:
multi-beam echo sounder system is used to monitor short-term erosion and sedimentation changes in the offshore area of the logistics park embankment in Binhai Port.It is found that there is an east-west oriented scour hole on the outer side of the embankment corner,which is about 570 m long and 110 m wide,and its edge has reached the bottom of the embankment,posing significant safety hazards.Through the analysis of monitoring data from May to November 2023,it is found that the edges of the scour hole continues to erode and showed no signs of slowing down.The research results provide accurate data support for subsequent embankment projects.The multi-beam echo sounder system can accurately identify the spatiotemporal changes in underwater topography,offering effective reference for similar embankment deformation monitoring.
-
SU Shiding, XU Xiong, ZHANG Bo, LYU Shuhui
2025(2):197-202
Abstract:
Coral reef sand,due to its special engineering properties such as fragility and high compressibility,differs from conventional sand.During impact pile driving,the process can easily cause complex changes in coral reef sand particles,such as breakage and shear,leading to pile running.Unanticipated pile running,especially over long distances,not only increases the difficulty of pile driving control but also poses high construction risks.Therefore,there is an urgent need for an analysis method to predict the depth of pile running in deep coral sand formations to guide pile driving control and reduce construction risks.In this paper,high strain pile tests are conducted in deep coral reef sand formations based on actual engineering scenarios.The analysis of soil resistance values in pile running conditions in coral reef sand is carried out,and a method for predicting the distance of pile running in coral reef sand formations is proposed.Furthermore,the pile driving control method that considers the risk reduction of pile running is proposed,and it is applied to 602 driven piles on-site for risk prediction of pile running and pile driving control,and the laws of pile diving in coral reef sand stratum are summarized.
