Abstract:In recent years，the government proposes a national spatial planning system which is integrating multiple plans into one to plan the development and protection of territorial space in the new era and strengthening its guiding and constraining role in special plans，so as to solve problems such as excessive types of plans and overlapping and conflicting contents. According to the Port Law，the Regulations on Port Planning and Management and the other laws and regulations，the port waters area planning scheme is an important part of the overall port planning，including the space utilization scheme of waterway，anchorage and other infrastructure. Regarding the problem of the current planning of port waters compiled for lack of a clear train of thought and technology method，we take Beibu Gulf Port as an example，put forward a research method with route + channel as major frame，adjust measures to local conditions to select the row anchorage，reasonable coordination to solve conflicts between all kinds of marine planning based on automatic identification system（AIS）data to carry out the vessel traffic density analysis，which is of great significance to give consideration to ecological environment protection，maritime traffic safety and port healthy development.

Abstract:Regarding the situation that unclear status and problem of China’s maritime transport channels and port fulcrum construction work，this paper studies the characteristics of the development status of maritime transport channels and port fulcrums，their contribution role，the requirements and shortcomings faced in the current and future. The results show that the westbound passage is the most important among four major passages. The fulcrums of overseas ports show the development characteristics of wide distribution，multiple functions and diversified participation models. The construction of maritime transport channels and port fulcrums has played an important role in improving the level of China’s external interconnection，promoting international production capacity cooperation，and serving local economic development. The future development priorities include enhancing the ability to guarantee shipping corridors in key regions，improving land interconnection networks，and optimizing the layout of overseas port fulcrums.

Abstract:The five-year development plan of water transport is based on the government’s five-year plan for national economic and social development，and it is a guide document to organize the construction and development of water transport，which plays an important role in promoting the development of the industry. On the basis of reviewing the plan history of China’s water transport development，this paper summarizes the changes in aspects such as the property，focus，and perspective of the five-year plan. This paper also examines the impact and requirements of the new development concept，the new development pattern of domestic and international circulations，and the construction of a national comprehensive three-dimensional transportation network on and for the water transport industry and points out the concept and methods for the plan of water transport development in the new era. The results are applied to the 14th Five-Year Plan of the Ministry of Transport and can provide suggestions for the formulation of the industry’s five-year development plan.

Abstract:The elevation of the bridge deck at the island-bridge joint of the Hong Kong-Zhuhai-Macao Bridge is relatively low，thus the wave has a complex and strong effect on the bridge deck，artificial island and other structures at the joint of the island bridge under the design water level and wave conditions. The wave force of the island-bridge joint structure is experimentally studied through the 3D physical model tests. The results show that：1）Under the design water level and wave conditions，for the island-bridge junction，the maximum dimensionless wave horizontal force of the single-span box girder structure is 0.7 F/（ρgA2H1%）and the maximum dimensionless wave uplift force is 0.2 F/（ρgA1H1%）. 2）The wave force is larger under the action of the S（positive 0°）and SSW（22.5°）direction waves than results in other directions. 3）As the water level rises and the relative elevation becomes smaller，the wave uplift force and the horizontal force on the structure both increase. 4）The maximum dimensionless uplift wave pressure is 2.0p/（ρgH1%）and the maximum dimensionless horizontal pressure is 1.9p/（ρgH1%）.

Abstract:Arc crown wall has excellent wave return effect and many engineering applications. Taking the arc crown wall as an example，based on the OpenFOAM open source program，we develop a two-dimensional numerical model for the action of waves and structures using the Renault average Navier-Stokes equation to describe the fluid motion. The numerical model is verified by the test results，and the similarities and differences of wave pressure distribution characteristics of different types of arc crown wall and the influence of arc radius of arc crown wall on wave force are discussed. The results show that under the conditions of different wave elements，the wave pressure on the wave face of the arc crown wall decreases with the increase of the elevation of the measuring point，the wave pressure on the same pressure measuring point decreases with the increase of the arc radius of the arc crown wall，the wave force on the wave face of the arc crown wall increases with the increase of the wave height，first increases，then decreases and then increases with the increase of the wavelength，and the wave force reaches the maximum at the maximum wavelength. At the same wavelength，the wave force decreases with the increase of arc radius.

Abstract:As an important revetment infrastructure，compound seawalls can protect the coast against tide and wave attacks. Through the physical model test，the influence of the compound seawall with different block face protection on the wave climbing height is studied，and it is found that：1）The run-up height is the smallest under the three-way hole block，moderate under the one-way hole block and max under the smooth block.2）For the same protective facings，as the incident wave height or period increases，the run-up height generally increase. 3）Furthermore，the empirical formula of wave run-up in Wave overtopping of sea defences structures and related structure assessment manual （EurOtop）is used to calculate the roughness coefficient of different block protective facings，so as to evaluate the performance of different block protective facings in reducing wave run-up height，which indicating the three-way hole block structure has good application value in practical ocean engineering.

Abstract:The mooring property is an important factor affecting the motion of the mooring ship. Based on the MIKE 21 Mooring Analysis numerical simulation software，a 177，000 m3 LNG ship is subjected to a numerical mooring test under the action of irregular transverse waves，and its influence on the motion of the moored ship is analyzed by changing the diameter and material of the rope. The results show that：1）The motion of the mooring ship is affected by the material and diameter of the rope，mainly due to the change of the rope stiffness. 2）The sway，surge and yaw movement of the mooring ship are greatly affected by the change of the rope，and all decrease with the increase of the rope stiffness. 3）The heave is mainly related to the incident wave period and wave height，and is less affected by the stiffness of the rope. 4）Pitch has little change due to its small amount of motion. 5）There is no obvious change rule for roll relative to the change of rope stiffness.

Abstract:Port automatic mooring system is a complex system engineering，which involves many subjects such as ship kinematics，structural mechanics，automatic control theory and information technology，and is the product of cross-specialty integration development. The automation of dock mooring is mainly realized through the change of mooring mode，the real-time monitoring of ship posture and movement amount，and the reasonable adjustment of ship and shore interaction force.Based on the advantages of the parallel platform robot in six-free motion simulation，an automatic mooring system for port ships is designed and proposed. The passive damping of each branch of the platform acts as the restoring force to adjust the amount of motion of the mooring ship to realize the active control of ship-shore coordination during the mooring operation. In order to verify the feasibility and effect of the scheme，a functional prototype tank test is carried out.

Abstract:In order to develop an offshore deep-water wharf that can better adapt to soft foundation and severe wave conditions，a new type of entirely prefabricated offshore deep-water wharf with suction bucket foundations and circular caissons is proposed by combining the advantages of suction bucket foundations and circular caissons. Its structural composition，plane layout and construction technology are expounded，and its bearing characteristics are analyzed. The structure can be arranged with berths on the shore side，and can also be used as a breakwater on the sea side. It has strong wave resistance，good bearing performance，high structural rigidity，good durability，low cost and little impact on the environment，and has wide application prospects. Compared with the suction bucket without compartment，this new structure greatly improves the anti-slip and anti-overturning ability by setting the inner bucket and clapboards. Penetration damage can significantly reduce the bearing capacity of the foundation when it is in place，and it is recommended to consider it in the design.

Abstract:Taking the planning scheme of the Zhujiang operation area in the Yangzhong port area of Zhenjiang Port as an example，this paper discusses the ideas and methods for the implementation of green development in the overall port planning. At the beginning of planning，it puts forward suggestions to guide spatial layout from the perspective of green development，such as avoiding environmentally sensitive targets，coordinated development of the port and cities，and efficient and intensive utilization of resources. After the preliminary formulation of the planning scheme and given the background analysis of the main types of goods transported and environmental quality in the operation area，it proposes that the impact of dry bulk cargo transportation in the port area on the atmospheric environmental quality should be the focus during planning. Moreover，it formulates different development scenarios of throughput in the planning year and predicts and analyzes the atmospheric environmental impact. On the basis of the prediction results，it presents some suggestions on the scale control of dry bulk cargo throughput in the planning year. The research result can provide a reference for the implementation of green development in the spatial planning of ports.

Abstract:Pile layout is the most critical design issue for the suspended structure subjected to forces of various directions（berthing force & mooring force，etc.），for which trade-off should be made among several aspects including the axial compressive and pullout force，pile strength，structural deflection and the constructability on site. Given such constraints and forces，traditional design procedure requires plenty of time-consuming iterations while the most optimized scheme is not always accessible. Therefore，to optimize the pile layout，GA（genetic algorithm）is employed with the calculation procedure of FEM embedded. Taking the horizontal & vertical angles and location of the pile top of each pile as the decision variables，utilizing several initial pile layout patterns from engineer’s judgement as the prior knowledge，and exerting the constraint condition including the limitation of internal force and no geometric interference，the evolution of pile layout is implemented，based on which a dedicated program is developed and calculating demo of a practical case is presented.

Abstract:This project is located in severe sea conditions area，with deep water，large waves，frequent strong typhoons and few days of offshore construction，making the construction extremely difficult. Aiming at the breakwater structure under severe sea conditions，based on the analysis of the actual sea conditions and construction requirements，super large double-layer accropode armour structure is innovatively proposed. The form and specification of the cushion and its influence on the armour stability，the safety of the double-layer accropode armour structure and the installation density of the armour block are discussed. The results show that the double-layer accropode structure is safe and reliable，and can better meet the needs of typhoon prevention during construction. The weight difference between the upper and lower layers should be increased as much as possible，and the weight of the upper layer accropode block should be about 3 times or more than that of the lower layer. For the super large double-layer accropode armour，the installation density of upper blocks can be appropriately reduced. The research results can be used as a reference for similar projects.

Abstract:The selection of reinforcement methods in the maintenance and reinforcement of old wharf structure is of great significance for the reinforcement effect，construction difficulty，and economic costs. To study the characteristics of the prestressed carbon fiber board reinforcement method and the enlarged section reinforcement method，we compare the feasibility and reinforcement effect of the two methods and comparatively test the indoor beam bending. The results indicate that the reinforcement effect of the prestressed carbon fiber board reinforcement method is better；the increase in prestress is also helpful in improving the load-bearing capacity of components，and the setting of the initial load can also improve the cracking load of components.

Abstract:The void caused by sand leakage in the backfill area behind a cylindrical gravity wharf has a great influence on the safe operation of the wharf. The ground penetrating radar（GPR）method has unique advantages in disease detection. On the basis of the characteristics of cylindrical gravity wharf engineering and the working principle of GPR，this paper performs forward modeling of the engineering model by programming calculations on matlab. Then，it uses engineering examples to detect the abnormal areas of sand leakage with two media，i.e.，cement slabs and hydraulic fill sand，and those of sand leakage with three media，i.e.，cement slabs，hydraulic fill sand，and gravel. Moreover，the study analyzes the characteristics of the electromagnetic response to delineate abnormal disease areas and verifies the detection effect of GPR with borehole and borehole TV imaging and seismic imaging methods. Practical application shows that GPR can be effectively used for the delineation of abnormal disease areas caused by sand leakage in the backfill area of the cylindrical gravity wharf. The research results can provide a reference for disease detection and treatment of similar projects.

Abstract:Mooring force is an important factor in wharf structure design and mooring bollards selection. The calculation methods of ship mooring force are different between different codes. Regarding the differences in current force calculation，this paper selects four wharf structural design specifications for comparison，namely JTS of China，ROM of Spain，OCIMF Guide and BS 6349 of Britain，and takes a 300，000-ton tanker as an example. The results show that：1）there are some differences in the calculation formula，relative water depth ratio，design current velocity and adaptive range of the current force on ships；2）The current force of the 300，000-ton tanker calculated by ROM is the largest，while the BS 6349 result is the smallest. The conclusion can be used as references for similar engineering design.

Abstract:This paper focuses on the calculation model and method for the subsidence of ripraps in the foundation trench of a gravity wharf. By a compression test of full-scale riprap blocks in the foundation trench，this paper obtains the stress-strain relationship of the block stones under repeated loading and unloading and then uses the relationship to build a calculation model for the subsidence of the ripraps in the foundation trench of the gravity wharf. Taking into account the construction process of the gravity wharf，this paper proposes a calculation method for the subsidence of the ripraps in the foundation trench and obtains the key parameters of the model by regression with the data observed in the actual engineering field. The results show that the calculation results of the proposed model are consistent with the observed data.

Abstract:Pavement interlocking blocks has been widely used in the road and storage yard of water transport engineering in China. The shape of interlocking block is special-shaped and has two-way interlocking function，and its compressive strength is a necessary inspection index required in JTS 257—2008 Standard for quality inspection of port waterway engineering construction.GB/T 28635—2012 Precast concrete paving units and GB 32987—2016 The method for performance of concrete paving units do not specify the method for measuring the compressive area of special-shaped blocks，which cannot meet the compressive strength test of interlocking blocks. For this reason，by analyzing the relevant standards at home and abroad，combined with the actual test methods and testing experience used in the project，a test method for the compressive strength of the interlocking block with the characteristics of water transportation engineering is proposed to correctly evaluate the compressive strength of the interlocking block，ensure the safety of the interlocking block paving project，and promote the high-quality development of the road yard of the water transportation project.

Abstract:The generalized finite element models of anchorless，single-anchored，and counterweight sheet-pile wharves are built separately，and a 100，000-ton sheet-pile wharf is used as a prototype for numerical analysis. The results indicate that the maximum horizontal displacement of the counterweight sheet pile is 1/13 of the anchorless sheet pile and 1/2 of the single-anchored sheet pile. The soil pressure distribution of the anchorless sheet pile sees a sudden change in the soil entry section，and that of the single-anchored sheet pile encounters the same behind the wall above the soil surface，while that of the counterweight sheet pile is relatively smooth behind the wall and in front of the wall. For anchorless and single-anchored sheet piles，the distributions of bending moment and shear force are reversed many times，especially for the anchorless sheet pile，while in the case of the counterweight sheep pile，except for the sudden change in bending moment at the counterweight table，the distributions of bending moment and shear force in other positions are relatively smooth. In the case analysis of the project，the horizontal displacement and bending moment of the counterweight sheet pile are within the normal range. Moreover，the counterweight structure does not require the setup of the combined structure such as the anchor system and the rear cast-in-place pile，featuring many advantages such as strong site adaptability，simple construction，and low construction costs. It has strong application value in sheet-pile wharves.

Abstract:The rapid development of the Yangtze River Economic Belt has put forward higher requirements on the channel dimensions of the lower Yangtze River. Ascertaining the maximum stable channel depth of this reach under natural endowment is thus of great practical significance for channel planning and development potential research. Considering that the Hukou-Nanjing reach of the lower Yangtze River largely consists of braided reaches in terms of river regime characteristics，this paper proposes a calculation method for the stable channel depths of the branches on the basis of stable channel depth estimation. It then calculates the maximum stable channel depths of several typical navigation-obstructing branches and obtains a relation between the maximum stable channel depth and the flow diversion ratio of each branch of this reach. The results show that the maximum stable channel depths of the four typical navigation-obstructing branches are respectively 11.2 m（in the right branch of the Madangnan channel），9.6 m（in the Xigang branch of the Dongliu reach），12.0 m（in the Zhonggang branch of the Guichi reach），and 15.7 m（in the main branch of the Jiangxinzhou reach）.

Abstract:In recent years，the contradiction between bridge site selection and the requirements for the axial spacing between adjacent over-river structures in Clause 5.1.2 of the Navigation Standard of Inland Waterway has become increasingly prominent. In response to this problem，the study takes the Yicheng Hanjiang River Bridge of the Xiangyang-Jingmen high-speed railway as an example to analyze the construction conditions such as the change in the river channel，waterway maintenance，flow conditions，and density of water transport in the river section of the bridge. On this basis，a simulation experiment of ship navigation is carried out. The results reveal that on the premise of ensuring the safety of ship navigation and bridges，we can appropriately adjust the requirements for the spacing between adjacent bridges according to the construction conditions in the river section of the bridge and the layout of the navigable span. This paper demonstrates the limitations of the requirements for the axial spacing between adjacent over-river structures in the Navigation Standard of Inland Waterway and puts forward suggestions for its revision.

Abstract:With the gradual implementation of the Lishui tail channel project，the water level and flow in the lower reaches of the Lishui River have changed greatly. The low flow of the lower reaches increased due to the regulation and storage of the Three Gorges Hydro-junction and two upstream reservoirs，while the low water level showed a slight downward trend. Moreover，the relationship between the water level and flow at the Jinshi Hydrological Station also decreased. To determine the lowest navigable water level downstream from the ship lock of the Yanzhou Hydro-junction at the end cascade of the Lishui River，this paper employs methods such as calculating the water surface slope in the dry season to analyze the causes and main trends of the above phenomena in consideration of channel regulation and sand mining activities. It then proposes a method of determining the short-term and long-term lowest navigable water levels downstream from the Yanzhou Hydro-junction and demonstrates the rationality of the reserved long-term water level drop.

Abstract:Regarding the beach protection belts in submerged type，we apply the method of combining theoretical analysis with the generalized flume test to study the diversion effect of beach protection belts in submerged type. The results show that the diversion beach protection belt has a good regulative effect on the water flow. The efficiency of the beach protection belts is expressed by the offset distance and the increase discharge of the main stream. The efficiency of the beach protection belts is affected by the water-blocking ratio and the submergence of the beach protection belts. The offset distance of the main stream and the rate of the offset discharge can well evaluate the efficiency of the beach protection belts.

Abstract:To test the ecological waterway construction level in the tidal estuary，we carry out the evaluation study. According to the natural conditions，ecological environment and channel attributes of tidal estuary，we analyze the connotation characteristics of tidal estuary ecological waterway and put forward an evaluation indicator system for it. Taking the South Passage of the Yangtze River Estuary as a case，we select appropriate indicators and evaluate the waterway health index. The results show that the waterway healthy index value of the South Passage after the first phase of navigation channel regulation project is 0.884 6，reaching good level. The regulation project greatly improves the conditions of river regime and enhances the channel conditions. Navigating conditions and water-related function are pretty good. Habitat and biological conditions are in the middle level，consistent with the ecological environment background state of the Yangtze River Estuary. The effect of ecological waterway construction in South Passage is remarkable.

Abstract:Step-shaped spur dike is widely used in channel regulation. As one of the important coherent structures of turbulence，the spatial correlation structure of velocity fluctuations can effectively reflect the flow field characteristics around step-shaped spur dike area. Based on PIV test data of turbulent flow of step-shaped spur dike area in open channel，the distribution characteristics of spatial auto-correlation and cross-correlation structure of velocity fluctuations in step-shaped spur dike area are analyzed，and the variation of two-point spatial correlation structures of velocity uctuations along streamwise，wall-normal and spanwise are studied. The results show that the auto-correlation of the streamwise velocity fluctuations Cuu and the auto-correlation of the wall-normal velocity fluctuations Cvv are both positive. The value of the autocorrelation coefficient is in the interval of 0.3 to 0.9，the distribution range decreases with the increase of water depth，and increases with the increase of the distance from the step-shaped spur dike. The cloud map of the cross-correlation coefficient of streamwise and wall-normal velocity fluctuations Cuv and the cross-correlation coefficient of wall-normal and streamwise velocity fluctuations Cvu in the near dike area has a basically symmetrical positive and negative partition phenomenon within the length of the first-level spur dike downstream of the spur dike. The distribution range of contour lines with strong correlation in the cloud map of Cuv and Cvu near the first step-shaped spur dike is larger in the area near the dike and smaller in the center of the flume. Near the center of the flume，the contour lines with the larger absolute value of the spatial cross-correlation coefficient of the velocity fluctuations are basically distributed above the secondary spur dike，Cuv is positive，Cvu is negative.

Abstract:In view of the navigation condition problem at the connecting section of Fuchi’s second-line ship lock with the Yangtze River，we adopt the two-dimensional numerical simulation experiment and the simulation experiment of ship handling to study flow conditions，ship handling，and ship navigation trajectories under multiple working conditions. According to the disadvantages of the design scheme in navigation conditions，we propose two measures for optimization：One is to widen the dimension of the entrance south coast，and the other is the adjustment of navigation trajectories. In other words，under low flow rates，ships heading downward could enter the ship lock as early as possible，and under large flow rates，the ship could turn round in a suitable position downstream to enter the ship lock with counter-flow. The results indicate that the optimized scheme can improve the navigation conditions of the connecting section and reduce the risk of ship handling，and the maximum navigable flow rate is increased from 54 100 m3/s to 68 200m3/s，which determines the reasonable flow parameters for engineering design.

Abstract:Due to the complex structure of the buildings，such as hydro-junctions，bridges，and spur dikes，along the Beijiang channel，the conventional measurement technologies are difficult to implement and offer low measurement accuracy. To overcome these problems，this study investigates a three-dimensional（3D）laser scanning measurement technology. Relying on a project in a certain section of the Beijiang channel，this study uses the 3D laser scanning technology to obtain high-precision 3D point cloud data of the appearance of aquatic objects along the channel and thereby provide fine topographic maps for channel capacity expansion and upgrading design. Then，it builds a 3D visual model，providing fine and rich surveying and mapping result data for the building information modeling（BIM）design of the project the study relies on. The results show that the 3D laser scanning technology can provide rich surveying and mapping results for channel design and thus offers favorable technical advantages.

Abstract:Taking Wanjiang embankment retaining wall project of Dongguan inland waterway in China Great Bay Area as an example，this paper introduces the engineering application of prestressed U-shaped sheet pile as embankment retaining wall. Firstly，the scheme comparison shows that the U-shaped sheet pile scheme has the advantages of fast construction speed，little influence on the river and low project cost. Then，the maximum applicable height of U-shaped sheet pile as cantilever retaining structure is obtained through theoretical calculation and analysis. Finally，the factors of horizontal displacement are analyzed，and the measures of presetting displacement and reinforcing the foundation behind the wall in advance are put forward to reduce the horizontal displacement. The field measured data show that the horizontal deformation mainly occurs in the first 45 days，and the later deformation is small. The operation data of retaining wall project show that the application is good，which can provide reference for similar inland waterway projects.

Abstract:On the basis of the four-level waterway construction project of Lancang River and the regulation plan for Hekuan-rapids，this study illustrates the rapids and hydrological characteristics and the historical regulation situation. Due to insufficient waterway length and depth in the rivers，as well as high flow rates，huge gradients，and bad flow patterns in the rapids section，ships cannot go up by themselves. Hence，this paper researches the navigation-obstructing characteristics of rapids from the aspects such as the flow rate，gradient，and rapids-passing hydraulic indexes and combines rock cleaning and damning for a wider water-crossing section and a higher sectional water level. In this way，the flow rate and gradient are reduced，and the above-mentioned problems can be solved. It is concluded that we can adopt the measure of “dredging up and uplifting down” to solve the problem of insufficient waterway length and depth in the rivers and difficulty in ships going up by themselves. The research result provides a reference for similar rapids regulation.

Abstract:Given the utilization status of dredged soil in waterway maintenance of the Yangtze River Estuary（YRE）in recent years，this study summarizes the successful experience of comprehensive utilization of dredged soil in waterways from the aspects of the treatment mode，implementation process，and achievements of dredged soil. Specifically，it mainly includes three aspects：1）phased implementation to adapt to the characteristics of dredged soil in waterways at different engineering stages，2）clear rights and responsibilities to create a communication and coordination mode of dredged soil utilization，and 3）win-win cooperation to explore the long-term operation mechanism of dredged soil utilization. On this basis，this paper discusses the development directions and suggestions for the utilization of dredged soil in the YRE channels in the future. In view of the sustainable utilization of dredged soil in the YRE channels during the 14th Five-Year Plan period and thereafter，the study preliminarily proposes several development directions of dredged soil utilization，including the implementation of the beach regulation of Hengsha Shoal（east of N23 submerged breakwater）and the elevation regulation project of Hengsha Phase 6-8，as well as the construction of large mud reservoirs in the north and south dam fields of deep-water channels. The research results are of certain guiding significance for the regulation and protection of beach resources in Shanghai and can also provide a reference for the resource utilization of marine dredged soil resources in China.

Abstract:Regarding the problem that the participants of the waterway regulation project cannot accurately reflect the actual situation of the project and cannot clearly express the reporting ideas when communicating and reporting，based on BIM，we develop the BIM+GIS three-dimensional interactive reporting system of the waterway regulation project. The system uses the SuperMap GIS platform to realize the data integration and performance optimization of the waterway BIM+GIS，and quickly loads the processed BIM+GIS data through the unity plug-in，realizing the flexible operation and efficient integration of BIM+GIS data and traditional documents. The system has been applied in the waterway regulation project of Wu’an section. Through the interactive communication report of the integration of BIM+GIS data and PPT documents，the cooperation and communication efficiency between the participating units has been improved，and the promotion and application of BIM technology in the channel regulation project have been further promoted.

Abstract:Regarding the evaluation of the reasonable throughput capacity of coal terminals adopting the new technology，this paper analyzes in depth the production operation process of coal terminals with multiple berths and few threads and the factors influencing their production capacity by investigating the planning and construction of an inland coal terminal project. Then，it employs the system simulation technology to build a logistics system model for the coal terminal adopting the loading and unloading technology and experimentally examines the relationships of the throughput capacity of the coal terminal arranged along the shore with the loading efficiency，the auxiliary operation time of the ships，and the berth shifting time of the ships. The results show that the multiple berths and few threads loading operation mode can meet the 14-million-t throughput demand of the terminal. Moreover，the ship arrival density is most closely related to the annual throughput，and the post-arrival auxiliary operation time and the berth shifting time have a large impact on the service level of the port and the utilization rate of the ship loaders.

Abstract:This paper aims to address the problems of poor pertinence and complex operation facing reinforcement calculation for ship lock projects by the 3D building information modeling（BIM）software Revit. Specifically，it achieves automatic and rapid calculation of reinforcement projects by secondary development in the software Revit，comparatively analyzes the calculation by the secondarily developed plug-in and reinforcement calculation by Revit，and verifies the application of the proposed plug-in with a ship lock project. The results show that the reinforcement calculation plug-in obtained by secondary development in Revit solves the problems of reinforcement calculation for ship lock projects by Revit，such as poor pertinence and complex operation. It also ensures the accuracy of reinforcement calculation and has wide applicability in ship lock projects. To a certain extent，it solves the difficulty in reinforcement calculation in ship lock projects.

Abstract:Regarding the problem that it is difficult to monitor the water-destruction of submerged spur dike in real time，this paper introduces acoustic camera to monitor the shape of submerged spur dike in real time. Based on the mapping principle of acoustic camera，a method is proposed to establish multi-view height arc using multi-view acoustic image and to determine the three-dimensional information of external structural feature points of submerged spur dike according to the constraint relationship between views. Combined with this method，the three-dimensional information reconstruction experiment of the shape feature points of the indoor submerged spur dike model is carried out. The results show that the external dimension error of the submerged super dike model reconstructed based on the acoustic image of four viewpoints is in the range of 0.8%~8.6%. It is feasible to apply the equipment and method to the real-time monitoring of submerged spur dike shape damage，which can provide a feasible reference and idea for the waterway department to maintain the regulation buildings.

Abstract:Due to the influence of geological structure and stratum deposition，the actual stratum distribution is not completely horizontal. Taking the foundation pit with inclined hard layer lying under soft soil as the research object，the influence law of slope angle hard layer and distance between slope and retaining structure on foundation pit deformation and basal heave stability are studied by establishing asymmetrical finite element model of foundation pit. The results show that：1）The slope angle and the distance between slope and retaining structure have significant influence on the deformation law and safety factor of the foundation pit. 2）The inclined hard layer causes asymmetrical distribution of soft soil on both sides of the foundation pit. The smaller the soil thickness is，the more constrained the retaining structure is. The basal heave of the pit bottom，deformation of the retaining structure and ground settlement outside the pit on the side are all smaller than that on the side with larger soil thickness.

Abstract:To improve the water stability of the swelling soil on the channel bank slope and the fracture resistance of the swelling soil under wetting-drying conditions，this study adopts the concentrated MB-148 CA soil stabilizer to modify the soil properties of the swelling soil. It examines the modification effect and mechanism of the MB-148 CA soil stabilizer from macroscopic，mesoscopic，and microscopic perspectives by testing the water stability of the soil and the unconfined compressive strength of the soil under wetting-drying cycle conditions and conducting scanning electron microscopy tests of the soil. The test results support the following conclusions：1）The modified soil has better water stability，and its unconfined compressive strength is significantly higher than that of the plain swelling soil. The soil stabilizer adopted effectively suppresses the strength degradation rate of the soil and the fracture propagation rate under the wetting-drying cycle conditions. 2）The dilution concentration for the soil stabilizer to modify the swelling soil should not be lower than 1:300（volume ratio）.

Abstract:The steel cylinder structure has the characteristics of short construction period，economy，good durability，and convenient construction. It has been applied in a project in the Guangdong-Hong Kong-Macao Greater Bay Area and a cross-river channel project in China. When there is a hard sand layer in the foundation，the vibration density effect of the sand layer will occur during the construction of the steel cylinder，resulting in the compaction of the sand layer，which brings great difficulties to the vibration settling of the steel cylinder. Forcibly installation will cause damage to the steel cylinder structure. Therefore，it is necessary to modify the sand layer and the sand layer foundation to change the vibration dense characteristics of the sand layer and make driven of steel cylinder smoothly.Through the experimental study of indoor bentonite modified sand samples，we find that：1）Bentonite can reduce the shear strength of sand very well. After modification，the cohesive force c will be improved to a certain extent，but the internal friction angle φ will be significantly reduced.2）The water-cement ratio has little effect on the shear strength of sand. The amount of bentonite has a great influence on the shear strength of mud-modified sand. 3）The mud mix ratio selected for bentonite modified sandy soil is recommended to be 5% of bentonite and the water-cement ratio of 8 to 20.

Abstract:Small-scale dredging projects usually adopt small cutter suction dredgers for construction. Nevertheless，the transportation and discharge distance of such dredgers fail to meet the demands due to the small power of their dredge pump. This paper explores the impact of the aeration technology for small-diameter dredging pipes on the pipeline’s discharge distance. The field test relies on the Shimen’ao storage，retention，dredging and reclamation project and takes place at two positions 300 m apart on the reclamation pipe in two modes，namely direct aeration with an air compressor and mixed aeration with a jet aerator. The test results show that the proposed pipeline aeration technology can effectively improve the transportation and discharge distance. Specifically，direct aeration with an air compressor produces a better result than that of mixed aeration with a jet aerator，especially when the aeration point is close to the end of the ship，and achieves an average increase of 22.2% in discharge distance，while mixed aeration with a jet aerator increases the discharge distance by 12% on average. The field test verifies the feasibility of the aeration technology for dredging pipes and provides a new solution to the discharge distance problem in dredging engineering.

Abstract:Aiming at the problem that the concrete in the corridor of ship lock is easy to crack when concreting in lifts is adopted，based on the given concrete thermal parameters and boundary conditions，the simulation software Midas FEA is used to simulate the distribution of the internal temperature field of the concrete in the corridor under different concreting in lifts and water-through cooling conditions. Combined with corridor size and external constraints，the risk of concrete cracking under different concreting in lifts and different spacing between cooling pipes is evaluated. The results show that the concrete cracking risk is high when the bottom plate，side wall and roof are poured separately，and the concrete cracking risk can be greatly reduced when the bottom plate and upper side wall，top plate and lower side wall are poured as a whole. Cooling water does not significantly reduce the cracking risk of concrete under external constraint stress. On the premise that the concrete temperature field meets the temperature control requirements，it is recommended to cancel the measure of cooling water.