Abstract:The ro-ro passenger transportation channel of Qiongzhou Strait is an important channel for the transportation of people and vehicles entering and leaving of Hainan Island，and is also an important support for the construction of Hainan Free Trade Port.Through the systematic analysis of the characteristics of rolling passenger transportation and port resources of Qiongzhou Strait，the key issues of regional rolling passenger port layout are obtained.It is proposed that the rolling passenger terminal layout of Qiongzhou Strait should take the vehicle transportation demand in peak seasons as the main basis for the supply of terminal capacity.On this basis，according to the requirements of the overall plan for the construction of Hainan Free Trade Port and the needs of ensuring the transportation of passengers and vehicles entering and leaving the island，the layout idea of regional ro-ro ports and the recommended port sites are proposed.

Abstract:The port-centered industry is an important engine for promoting the economic development of coastal areas in China and occupies an important strategic position in regional economic development.However，in terms of spatial scope，the utilization of water transport in the economic development of coastal provinces is different，which reflects significant spatial and industrial differences.On the basis of collecting and sorting out the input and output data of 142 departments in 13 coastal provinces and cities in 2017，this paper uses the input-output model to analyze the spatial and industrial characteristics of water transport utilization in coastal provinces and cities in China，explore the differences in basic flow，industrial influence，industrial sensitivity，and other aspects of the water transport industry in coastal provinces and cities，and summarize the spatial and industrial characteristics of water transport utilization in coastal areas.In addition，the paper puts forward relevant suggestions on the development of the port-centered industry in coastal provinces and cities in China during the “14th Five Year Plan” period，which can provide a reference for the relevant research on the port-centered industry in China.

Abstract:Port general plan is a special plan in the territorial space planning system.Its core role is to study and clarify the reasonable scheme for the spatial development and protection of port resources，promote the orderly development and effective protection of port resources，and provide the basis to carry out the territorial space planning and coordinate the spatial requirements of related industries.Since the implementation of the?Provisions on the Administration of Port Planning and the Contents and Text Format of the General Port Planning?around 2007，they have effectively guided the preparation of a number of general port plannings.In the new historical period，the major national and regional strategies have been implemented one after another，and the construction of territorial space planning system and national comprehensive three-dimensional transportation network has been accelerated，all of which have put forward new requirements for port general planning.Taking Beibu Gulf Port，Tianjin Port and other ports as examples，this paper makes a beneficial discussion on the preparation tasks，research ideas，guiding ideology，planning principles，current status evaluation，nature and function，shoreline utilization，port area division，function division，spatial layout and other contents of the overall port planning in the new era.Combined with the requirements of the times，it puts forward innovative research ideas on the key contents of the general port planning，which provides a technical reference for the development of port general planning in the new era.

Abstract:After studying the variation law of the secondary wave transmission coefficient behind the breakwater by the physical model test of the sloping breakwater，this study establishes the relationships of the relative outlet height?Hc/Hs?and the relative levee top width?B/Hs?with the wave height transmission coefficient，and fit the nonlinear regression formula.At the same time，the fitting formula in this paper and the empirical formula are applied to calculate the height of the secondary wave behind the breakwater under different working conditions，and the results are compared with the test results.The results show that the proposed fitting formula is the most consistent with the experimental results and has good applicability.Then，the differences in the calculation results of other empirical formulas are analyzed.The results can provide a reference for engineering practice and the calculation of the post-dike secondary wave generated by the allowable surge at the top of the sloping breakwater.

Abstract:Regarding the parameter selection of ABAQUS(finite element analysis software)CDP model(concrete damage plastic model)，combined with the experimental results of Yuan Yingshu，the selection of viscosity coefficient，dilation angle and calculation method of CDP model is discussed.The results show that：1)When the viscosity coefficient is 0.001，it has good calculation accuracy and convergence；2)When the dilation angle is about 36°，the calculated results are in the best agreement with the experimental results；3)For the reinforced concrete problem of CDP model，the “Static，General” method(general statics method)should be used instead of the Risk method(arc-length method).The calculation results of the suggested values of these parameters can well reflect the damage and cracking process of reinforced concrete beams，and can provide a reference for the research on mechanical properties of reinforced concrete members in port and wharf projects.

Abstract:To reduce the wave reflection at the front of the wharf and improve the berthing stability of ships，more and more perforated caissons are used in quay wall projects，but there still is a lack of systematic explanation on caisson opening types in relevant codes of practice.Taking the fourth phase project of Dayaowan Port area of Dalian Port as an example，we use the physical model experiment to emphatically analyze the effects of different caisson opening types on wave height reflection coefficients at the front of the wharf under the action of irregular waves.The results show that the wave height reflection coefficient is usually smaller driven by short-period wave than designed wave.The wave attenuation performance of test section is best in designed low water level.The wave cavity of caisson parapets takes less effects on reducing the wave reflection.The wave reflection coefficient is mainly dependent on percentage of opening.

Abstract:To study the reinforcement effect of rank vegetation on shallow layer of large scale dredged soil storage areas，two kinds of rank vegetation，Pennisetum hydridum and Sorghum bicolor×Sorghum sudanense，are selected and planted in the silty clay-dominated soil storage areas after draining the upper layer of water.The undisturbed pure soil and root-soil composite samples are collected，the reinforcement effect of the roots of the two plants on the soil is quantitatively analyzed through the direct shear test，and the root development and tensile strength of the two plants are observed and compared.The results show that：1) The root of?Pennisetum hydridum?is more denser and the tensile strength is higher，the root content of the soil is 2.1 times，and the root tensile strength is 1.6 times that of?Sorghum bicolor×Sorghum sudanense；2) The internal friction angle，cohesion and shear strength of the soil can be significantly improved by both?Pennisetum hydridum?and?Sorghum bicolor×Sorghum sudanense，and the internal friction angle，cohesion and shear strength of the solidified soil are 1.5~6.3，1.2~2.4 and 1.2~3.2 times that of the pure soil，respectively；3)Under the condition of similar soil moisture content and same horizontal distance from the plant，the soil solidification effect of?Pennisetum hydridum?is better than that of?Sorghum bicolor×Sorghum sudanense；4) The soil solidification effect of?Pennisetum hydridum?obviously weakens with the increase of the horizontal distance from the plant；5)Both the plants can promote the dewatering of the shallow layer of dredged soil.Above all，planting rank vegetation can be taken as an auxiliary measure for soil solidification treatment in large-scale dredged soil storage areas，which is in line with the “carbon peaking and carbon neutrality” goals and the green development concept.

Abstract:In the port and waterway engineering，the permeability coefficient of soil is an important design index，which is of great significance in practical engineering.At present，the widely used test methods of permeability coefficient have limitations，the intelligent，accuracy，operability and environmental adaptability need to be improved.To solve this problem，we develop a set of shipboard multifunctional permeameter，and test and compare the application of this permeameter on a marine geological survey project in Caofeidian.The results show that the permeameter can not only suitable for ship shaking environment，but also can measure permeability coefficient under the condition of simulating in-situ stress state of soil in laboratory by adopting automatic and intelligent design.The shipboard multifunctional permeameter is convenient to operate，high degree of accuracy and automation，and the coefficient of soil pressure at rest can be measured by changing test method.

Abstract:As it is difficult to repair the damage of epoxy coated steel bar in marine engineering structures，this paper uses the cathodic protection technology combining sacrificial anode and conductive mortar to study the change trend of conductive mortar resistivity along with age.It studies the cathodic protection effects of the sacrificial anode on epoxy coated steel bars with different damage rates in the conductive mortar，including the protection potential，emission current，and steel bar apparent changes.In addition，the service life of the sacrificial anode is evaluated based on the data of its state change.The results show that the sacrificial anode and conductive mortar can protect the damaged epoxy coated steel bars，and the lower damage rate of the steel bars is accompanied by the shorter time needed for the protection current in the system to reach equilibrium.The sacrificial anode mortar can protect the epoxy coated steel bars with a breakage rate less than 10% for 53 years.

Abstract:As the main protection part of the wharf structure，the breakwater plays an important role in supporting the stable and reliable operation of the wharf.The layout and structure selection of the breakwater are the key and difficult points of the breakwater design work.Based on specific projects，this study compares the feasibility and economy of different breakwater layout and structure schemes under complex natural conditions such as strong waves and sudden siltation.According to the comprehensive analysis results，the study proposes the layout of arranging the breakwater head outside the surf zone and puts forward the combined structure scheme of rock slope breakwater in deep water areas and concrete single sheet-pile breakwater in shallow water areas，which has excellent economic benefits.

Abstract:Ship type design is the foundation of wharf design，and it is the basis of wharf berthing grade，structure design，and water scale design.The mileage of waterways of class Ⅵ and below in Shanghai accounts for about 75% of the total waterway mileage.There are big differences among the current navigable ships，representative ship types of waterways，and designed ship types of wharfs.The contradiction between the design grade of wharfs and navigable ship types caused by mismatching intensifies increasingly，which brings a lot of inconvenience to the planning，design，construction，and operation management of inland wharfs.By sorting out and analyzing the key issues，this study investigates the similarities and differences among the current navigable ship types，designed ship types of wharfs，and representative ship types of waterways.Finally，through theoretical calculation and result review for demonstration，the study proposes the determination method of designed ship type of inland wharfs in Shanghai.

Abstract:The construction and development of coastal container port areas have supported the growth of domestic and foreign trade and the rapid economic development in China.On the basis of summarizing the construction characteristics and development trends of coastal container ports in China，this study analyzes the current construction and development problems of the container port area in Ningbo Zhoushan Port and puts forward development ideas and construction measures for the container port area in Ningbo Zhoushan Port including building a “ten million container class”port group，expanding and improving service functions，optimizing the collection and distribution system，and promoting the intelligent and green upgrading of the port area.The study can provide references for promoting the high-quality development of Ningbo Zhoushan Port and accelerating the construction of a world-class port.

Abstract:Based on the project example of upgrading a 1，000-ton wharf in Humen Port，Dongguan into a 50，000-ton wharf in situ，the composite structure of high-pile beam and sheet-pile is proposed through the analysis of the project status and existing problems.The composite structures of sheet-pile wall and high-pile beam-plate are integrated to form a whole unloading structure，which can effectively reduce the earth pressure on sheet-pile wall.The sheet pile structure can meet the construction requirements of deep water wharf with large tonnage.In this paper，the selection of renovation scheme is discussed and the structural analysis and calculation are carried out.According to the elastic theory，the finite element three-dimensional numerical model is established，and the calculation results meet the engineering requirements.The composite structure is proposed based on specific conditions，and has distinct structural characteristics，which can be used as reference for similar wharf upgrading projects.

Abstract:The large number of anchorage，complex water topography and various types of ship berthing in the Three Gorges Dam area have brought difficulties to the popularization and application of shore power technology.From the point of view of infrastructure，this paper conducts research and analysis on the anchorage and ships waiting for lock in the Three Gorges Dam area，combining with the four common ship berthing modes in the three Gorges Dam area：barge，vertical pier，Ding berthing and anchoring.The mode and layout of shore power access to anchorage in the Three Gorges Dam area are studied，and a feasible differential anchorage access scheme is put forward，providing ideas and technical support for anchorage shore power construction.It can not only solve the problem of ship pollution in the Three Gorges Reservoir area，but also is of great significance for the construction of water green service area and promoting the development of green shipping in the Yangtze River Economic Belt.

Abstract:Relying on one rear crane pile static load test of a container terminal project，for open-end and semi-open end steel tubular piles，the analysis on the results of the common calculation methods on the pile bearing resistance used at home and abroad，as well as the comparisons between the calculation results and the pile test results have been carried out.It is found that there are certain differences on the calculated results on the friction，end and total bearing resistance with different common calculation methods as well as the results of pile load test for the soil conditions with sand and clay distributed alternately.The total resistance calculated by the method stated in the domestic code is close to the results of pile load test while the methods stated in foreign codes have relatively large derivation with the load test.The semi-open pile shoes can significantly improve the pile end bearing resistance and the pile plug coefficient can reach more than 0.8.The conclusions may be reference for similar projects.

Abstract:In the?Code for Master Design of Shiplocks(JTJ 305—2001)，it is stipulated that the minimum water depth on sill should satisfy the requirement of?H/T≥1.6(H?is the minimum water depth on sill，T?is maximum draft of design vessel).The objectives of the stipulation are to guarantee certain speed of vessels through locks，make lock operation efficient，satisfy the demand of vessels'changeable draft during flood season and leave space for vessels upsizing.But in practice the stipulation of the code is not fully comprehended and executed.Through analysis to the application of the stipulation，it is found that the simple stipulation cannot fully meet the requirements in the engineering practice.For locks on rivers，the upstream water level is controlled by the reseroir operation rule.There are five possibilities for the lowest navigation level.They are corresponding to different downstream water levels and the minimum water depth on sill should be decided separately.

Abstract:The navigation flow conditions at the entrance of the approach channel affected by the upstream curve river course are very complex.In this paper，a navigation hydraulic model test is carried out based on a water conservancy project to explore the function of connecting the approach channel with a bottom-permeable separation levee，and the distribution characteristics of flow velocity at the entrance of the approach channel under different lengths of separation levee are compared and analyzed.The results show that the separation levee can effectively reduce the velocity gradient between the entrance of the approach channel and the river mainstream，and improve the navigation flow conditions.With the increase of the length of the separation levee，the maximum longitudinal velocity and transverse velocity at the entrance of the approach channel tend to decrease.The length of the bottom-permeable separation levee should be reasonably set by comprehensively considering the flow conditions，cost，and other factors.

Abstract:Taking the second phase of the proposed Hubei Jingzhou coal，iron and water intermodal transportation storage and distribution base as an example，this paper studies the dock ship berthing and unberthing water in view of the most unfavorable situation when the navigation rules of “respective left” are implemented and the wharf is arranged on the left bank of the bridge.Combined with the analysis of the relevant results of the ship docking berthing route setting and ship maneuvering simulation test，the distance between the dock and the bridge should not be less than 4 times the length of the designed ship type of wharf and the minimum distance between the lowest end of the wharf and the water area of the bridge area should not be less than 1 time of the length of the ship type，so that the ships in the proposed project can meet the requirements of crossing the river and berthing outside the water area of the bridge.When leaving the berth，the ship needs to make two cross-sail turns to meet the requirements of the specification.However，from the perspective of navigation safety，the risk of ship navigation safety is smaller when turning around in place.Therefore，it is suggested that the river section of the bridge area be modified in the next revision of Inland River Navigation Standard to be consistent with the waters of the bridge area.

Abstract:The main hoist of Goupitan ship lift involves large drum，complex stress and boundary conditions，and frequent operations.The stress of the drum periodically changes，which may cause fatigue damage to the drum welds.So the fatigue strength analysis of the welds is an inseparable part of the drum design.Based on the complexity of the structure and load of the drum，this study uses the finite element analysis method to calculate the stress variation range of the drum.The modeling method fully considers the mechanical assembly characteristics of the drum group，bearing seat，and substructures of the drum group.At the same time，the study designs the weld fatigue strength by the standard “Eurocode 3” fatigue strength evaluation method.The design method of weld fatigue strength based on finite element analysis and “Eurocode 3” fatigue strength evaluation can provide references for the design of ship lift in hydro-junction.

Abstract:Unlike the water-saving ship locks on canals，the water-saving ship lock of the navigation-power junction in mountainous areas has a large variation of navigable water level and complex terrains on both banks.It faces some difficulties in the layout of water-saving basins，water level classification，and operation mode of the ship lock.For the project in the mountainous area with the navigation structures and the hub separately arranged，this paper studies the layout scheme of the water-saving ship lock.A high water-saving basin and a low one are set on both sides of the ship lock respectively to make full use of the topographic conditions of the project.Given the large variation of upstream navigable water level，it is determined that the ship lock adopts two operation modes of water-saving and non-water-saving，and the upstream critical water level is 214.0 m.In these conditions，the water level classification of the ship lock is calculated and analyzed to determine the elevations of the water-saving basins，and the layout of the filling and emptying system of the water-saving ship lock is put forward.The hydraulic characteristic indexes，the pressures of the culverts near the valves，and the ship berthing conditions in the lock chamber of the ship lock under different operation modes are obtained through the physical model test.Furthermore，the opening and closing modes of the valves are recommended.The results show that the proposed scheme of the water-saving ship lock is reasonable and feasible in hydraulics.

Abstract:It is important to consider the effect of the navigable flow condition when a newly ship lock is built beside the existing ship lock.An unreasonable layout of ship locks may lead to safety problems during operation.We carry out a physical model test with the scale of 1??100 to study the navigable flow conditions of the upstream entrance area and berthing section before and after the construction of Wan'an second ship lock，and propose the optimized layout scheme of the entrance area of the approach channel based on the test results and terrain conditions.The results show that the flow conditions of the second ship lock near the entrance and piers in original design scheme exceed the standard，and the flow conditions of the first ship lock are worse than the situation before the second ship lock is built.The flow conditions of upstream at second ship lock in all conditions of optimized scheme meet the requirements，and the flow conditions of the first ship lock are better than that before the second ship lock is built.

Abstract:Aiming at the problem of safe-operation of the floating gate against ice damage in the freezing period in extremely cold area，taking the large floating gate in the Far East of Russia as an example，this paper develops the gate external bubble anti-freezing system，auxiliary electric heating system，water stop anti-freezing system，external anti-freezing detection system and melting ice monitoring system，internal water tank anti-freezing system，which can make the floating gate still operate normally and safely under extreme climate conditions.The successful development of the gate makes it possible for ships to pass normally in the port area in the extremely cold area under extreme working conditions.It expands the water area for the site selection of the port area，improves the utilization rate and turnover rate of the channel，and reduces the shipping cycle and cost.

Abstract:In view of the close distance between Shuangqiao junction and Xinjianghai junction in the Xinjianghai River waterway，the small water level difference，and the long normal level period in the upstream and downstream，this paper carries out the technical and economic analysis of retaining or canceling the Shuangqiao cascade scheme.The results show that canceling the Shuangqiao cascade scheme has a great influence on regional flood control，drainage，water system connectivity，and water quality.The total investment and the operation cost of the water system restoration project are high，and the internal rate of return of the project is low.In contrast，retaining the Shuangqiao cascade scheme to maintain the existing water system layout can ensure that the ship lock can be opened and jointly dispatched with the ship lock of the Xinjianghai River，so as to share the anchorage to be locked，which is economically reasonable.

Abstract:Since the sediment runoff in the Yangtze River Basin has greatly decreased，this study analyzes the general changes in tidal flats in Yangtze River Estuary before and after the operation of the Three Gorges project based on the measured topographic data and finds that the high tidal flats increase，while the medium and low tidal flats decrease.The relationship between tidal flats in Yangtze River Estuary and wading engineering can be divided into four categories.Specifically，in terms of tidal flats that have been enclosed，the areas of high，medium，and low tidal flats are greatly reduced.In terms of tidal flats with built projects，the high tidal flats increase.The medium tidal flats decrease greatly，and the low tidal flats decrease slightly.In terms of tidal flats affected by surrounding projects，the evolution of the tidal flats is related to the relative position of the projects，the river regime of the tidal flats，and hydrologic and sediment conditions.In terms of tidal flats undergoing natural evolution，the high tidal flats increase，and the medium and low tidal flats decrease.The results show that the reduction of sediment inflow in the basin is the driving factor of the tidal flat evolution in Yangtze River Estuary，which has the characteristics of large range，long period，and slow change.However，human activities are the factors triggering the evolution of the tidal flats in Yangtze River Estuary，which have the characteristics of local range，short period，and drastic change.

Abstract:Daijiazhou Waterway is located in the middle reaches of the Yangtze River from Wuhan to Anqing，and it is one of the key beach sections that affect navigation in the branches of the middle reaches of the Yangtze River.In recent years，as the economy develops along the Yangtze River，higher requirements have also been placed on the water depth of the waterway.To meet the higher-scale water depth requirements，the waterway department implemented the 6.0 m waterway regulation project for the waterway in 2018.After the implementation of the project，regular observation data of effects is analyzed to evaluate the remediation effects.The results show that the implementation restrains the continuous scouring development of the Chihu Port Beach and the Lejia Bay Beach.It constructs a good beach-groove pattern and improves the waterway conditions of the straight channel，basically unblocking the 6.0 m channel.

Abstract:At present，the opening and closing position control of reversed tainter valve of ship lock mainly depends on the chain drive opening detection device and proximity switch.Since the reversed tainter valve of ship lock is frequently opened and closed under high water head，when the connecting shaft and the shaft sleeve of the boom are worn，the opening and closing position error of the reversed tainter valve will gradually increase，causing the over-closing phenomenon of the reversed tainter valve，and then causing damage to the valve body，water stop and bottom sill embedded parts of the reversed tainter valve.Aiming at this problem，this paper studies the operation state detection scheme of the reversed tainter valve of the ship lock by improving the accuracy of the opening and closing control system.The problems existing in the position control system of the reversed tainter valve are analyzed，and the angle information of the opening and closing position is detected by installing the inclination sensor inside the valve body of the reversed tainter valve，which improves the control accuracy of the opening and closing position.In 2021，the installation，construction and testing of the operating state detection device were implemented at the right-charge reversed tainter valve of Gezhouba No.3 ship lock，which verified the technical feasibility of the online detection system for the operating state of the reversed tainter valve and the advanced detection level.

Abstract:Influenced by many factors，such as the regulation of upstream and downstream hubs and the project regulation scheme，the channel in the backwater fluctuating section of mountainous river hubs has complex and changeable hydrological conditions.Therefore，determining the design lowest navigable water level has become a key problem.Relying on the waterway construction project from Baishi to Fenshuixi of Qingshui River，the key values of the design lowest navigable water level are determined by a two-dimensional numerical simulation of water flow.It is proposed that the waterway project is designed according to 90% navigable guarantee rate，taking the two most unfavorable conditions of the dry season and the flood season and using the lower envelope of the water level along the route as the design lowest navigable water level.The research results have solved the key problem of the project and can provide a scientific basis for the construction of similar projects.

Abstract:To verify whether the channel and the turning water area of the newly built Baima berth in Fuzhou Port can meet the requirements for the safe navigation of 50，000-ton bulk carriers，this paper uses ship parameters and hydrometeorological factors to design the navigable channel of the ship，and studies the ship's maneuvering characteristics with the Nomoto equation and obtains the turning water area required for ship docking and berthing operation.To verify whether the design meets the requirements，a ship handling simulator is used to simulate the voyage.The results show that the theoretically designed channel meets the requirements for the navigation of 50，000-ton bulk carriers，and there are difficulties in maneuvering under the working conditions of the torrent，and the deviation of the rotation diameter beyond the design occurs when turning away from the berth under heavy-duty.Setting up various navigation conditions to simulate the real navigation of the ship can not only obtain the experience of sailing in the channel，but also verify the rationality of the design of the channel and the turning water area.

Abstract:In order to study the changes in the through capacity of the Qianwan one-way waterway in Qingdao Port after the completion of the waterway expansion project and improve the waterway service level，this study establishes a spatio-temporal operation system of the Qingdao Port and a simulation model of the Qianwan Waterway in Qingdao Port based on Flexsim simulation platform.According to the predicted results of the number of ships of different tonnage and types passing through the Qianwan Waterway in different level years，the study carries out the simulation test and analyzes the through capacity and service level of the waterway before and after the expansion project of the Qianwan Waterway in Qingdao Port.The results show that the expansion project of the Qianwan Waterway in Qingdao Port can effectively improve the through capacity and service level of the waterway.The research results can provide important theoretical and decision-making guidance for determining the navigation standards of ships after the waterway expansion.

Abstract:With the rapid development of international trade，the container handling capacity of major ports is growing rapidly.The rapid increase in container handling capacity has caused bottlenecks in the collection and distribution roads of the major ports，resulting in traffic congestion and accidents.This study proposes time-sharing strategies such as the container truck appointment system and intelligent container truck platooning combined with the collection and distribution road environment in Yangshan Port and the construction scheme of the collection and distribution center outside the port.In this study，the future traffic flow is predicted based on the current road conditions in Yangshan Port.Then，the long-term traffic flow scenario and the specialized lane scenario are simulated，and the SUMO is used as the simulation software to verify the effectiveness of time-sharing strategies in the two scenarios.The simulation results show that，based on the strategy of the container truck appointment system，the non-equilibrium factor in the peak hour can be reduced by 25% in the long-term traffic flow scenario，and the objective of peak-load shifting is achieved.Based on the intelligent container truck platooning strategy，the average hourly traffic capacity is increased by 98.1% in one single lane in the specialized lane scenario，and thus the traffic capacity of the collection and distribution roads can be effectively improved.

Abstract:The plane two-dimensional flow mathematical model is established by using the measured data of the multifunctional navigation mark，and the flow state of the river where it is located is accurately restored.The applicability and adjustability of the model are analyzed.The results showed that：1)The model has strong applicability.When the initial conditions and boundary conditions match or do not match，the model can use the measured data of multifunctional navigation mark to restore the flow state of the river.The water level error is below 10 cm，and the flow velocity error is about 0.2 m/s.The flow field restoration is also consistent with the actual situation.2)The model has good parameter adjustability.Under different circumstances，the model can be calibrated by fine-tuning local parameters according to the multifunctional navigation mark data.

Abstract:Regarding the dynamic monitoring and management of energy consumption and equipment in ports，this paper studies the design and visualization of port energy consumption management systems.Based on the analysis of design requirement and principals，an intelligent port energy consumption management platform is designed using a BS architecture based on c# and .Net platform.After operation for a long time，the system is proved to be able to provide dynamic supervision and management of the energy consumption and equipment states，multi-dimensional analysis of the energy consumption characteristics and decision support to energy consumption management.The proposed intelligent port energy consumption management system can analyze energy consumption data and help achieving carbon reduction in ports.

Abstract:Based on the soft foundation treatment project of the multi-purpose berths in the second harbor basin of Xuwei port area in Lianyungang，this study carries out splitting tensile tests of solidified marine soft soil and investigates the variation law of tensile strength of cement mixed with lime or fly ash.The study also uses the grey relation theory to determine the influence of various factors on the splitting tensile strength of solidified marine soft soil.The results show that the solidification effect of cement mixed with lime is better than that of cement mixed with fly ash.The tensile strength of solidified soil of cement mixed with lime is 1.3-2.9 times that of cement mixed with fly ash at different curing ages.When the initial water content of marine soft soil increases from 60% to 80%，the tensile strength of solidified soil decreases by 24%-75% at curing ages of 7-28 d.Water content and curing age are the main factors affecting the splitting tensile strength of solidified marine soft soil.Among the curing agent content，cement content has the most significant effect on the splitting tensile strength.Based on the machine learning method of an artificial neural network，this study proposes the prediction method of tensile strength of solidified marine soft soil.The method can predict the tensile strength of solidified soil with different initial water contents and curing agent contents quickly and accurately.

Abstract:Large-diameter vertical rock-socketed pile will present a unique force characteristic under the action of horizontal forces such as hydrology and ship load.In recent years，there are relevant indoor scale model tests，but few on-site physical tests.We analyze and study the test process and achievement data by combining a all-vertical pile wharf project under construction in the east coast of Zhejiang，and carry out the horizontal static load test of large-diameter cast-in-place rock-socketed pile solid.The results indicate that the maximum bending moment of large diameter cast-in-place vertical rock-socketed piles subjected to horizontal external forces occurs below the seabed and around 2D?to 3D?within the cover layer.When designing pile foundations，it is important to consider whether the bending bearing capacity at this location meets the requirements，and to independently analyze and calculate the shear bearing capacity of the full rock-socketed section.

Abstract:For soft soil foundation such as loose sand，silt and clay，we study the measures to improve the bearing capacity and reduce the settlement.The usable soil layer of vibro-compaction method is loose sand.The vibro-replacement stone column method is used to treat silt，general clay and soft clay (silt，silty soil).The usable soil layers of vibro-powder sprayed stone column are silt and clays ( the undrained shear strength?cu＞?15 kPa).We introduce the material mix ratio of vibro-powder sprayed stone column，obtain the cube compressive strength through test，and use dry bottom discharging technology in construction.The results show that compared with vibro-replacement stone column，vibro-powder sprayed stone column can increase the bearing capacity of the foundation by about 1.3 times and reduce the settlement of the foundation，which has a broad market prospect.

Abstract:As the key equipment of the hopper system，the loading box directly participates in the loading process，and its discharge characteristics have an important impact on the effect of loading and production efficiency of the ship.Taking the loading box of a 15，000 m3?trailing suction hopper dredger as the research object，the flow field numerical simulation method is used to calculate and analyze the key parameters such as the main body size and structural form of the loading box，which affect the flow characteristics.The results show that within a certain range，the energy dissipation effect is improved as the diameter of the loading box increases，and the discharge uniformity is improved to a certain extent.Under the condition of equal cross-sectional area，the effect of loading with a circular-section loading box is significantly better than that with a square-section one.The downward velocity component at the middle openings of the loading box is much larger，which can be locally optimized by arranging two horizontal baffles.The loading box design proposed in this study can help to improve the deposition effect in the process of dredging and loading fine silt，save loading time and reduce overflow losses.

Abstract:The statistics of loading overflow construction quantities can include the sand settling in the channel range，while the sand settling outside the channel range cannot be determined.Therefore，the dredging quantities calculated according to the channel volume are much smaller than the actual dredging quantities when the engineering is checked and accepted.Based on the 100，000-ton channel project of Rongxing port area of Panjin Port，we build the tidal current and sand model of the project area by MIKE 3 hydrodynamic numerical simulation software，and calculate the overflow sand loss outside the channel range.The results show that this method can calculate the loss of loading overflow construction in the whole construction period，and it is important for the construction party to count the actual dredging quantities.

Abstract:A dredging project in Tianjin is implemented with a large cutter suction dredger，and the maximum discharge distance of the project is about 17 km.Since a single non-self-propelled large cutter suction dredger cannot meet the requirement of long discharge distance construction，the series connection construction technology of large cutter suction dredgers is studied.By removing the bridge frame，steel pile positioning，and other systems of idle cutter suction dredgers and adding auxiliary equipment such as anchor cable positioning，the adaptive transformation for the large cutter suction dredgers is carried out through series connection construction.Through the theoretical calculation of various working conditions of series connection construction，the optimal construction spacing range of two dredgers is determined.The productivity and stability of the series system of the large cutter suction dredgers are improved to ensure the completion of the project on schedule.The results show that the equipment reconstruction plan and series connection construction technology of large cutter suction dredgers can meet the project requirements of long discharge distance construction，reduce production costs and idle dredgers，and increase productivity by about 24%，with remarkable results.

Abstract:If the underwater water retaining device is to be installed on the surface of the cylindrical structure，it is necessary to solve the two major problems of sealing and retaining water together with the cylinder structure and bearing the buoyancy of the device.Based on the analysis of existing water retaining structures，this paper puts forward a kind of underwater construction device subjected to top pressure of casing which is composed of water retaining structures and bearing structures.The water retaining structure is a split casing structure with a circular hole reserved at the bottom and an open top，and the water is retained by the close contact between the reserved circular hole and the cylindrical structure.The bearing structure is a well-shaped top pressure structure arranged on the top of the pile foundation，bearing the buoyancy on the water retaining structure and transmitting it to the two adjacent pile foundation structures.Combined with the installation practice of the floating mooring pile steel casing box of a high-piled wharf，the device design and the stability check calculation of pile foundation structures are carried out in this paper，and the construction key points and process control requirements are clarified.The device is reusable，economical，reasonable，and technically feasible，which provides a reference for the underwater construction of similar projects.