Abstract:Based on on-site hydrological，sediment，and topographic data，we analyze the natural conditions，current and sediment environment characteristics，and coastal evolution characteristics of the Daya Bay.The research results show that Daya Bay has a small tidal range，weak wave and current forces.The water body has a relatively low suspended sediment concentration(SSC).The sediment source is limited and the small amount of sediment transported on the beach near the shore is the primary source of sediment in Daya Bay.The surface sediments are primarily composed of clayey silt，which is typical of muddy coastal areas.Due to the clean water and low SSC，weak wave and current dynamics result in the seabed remaining stable for a long time.The recent significant changes in erosion and deposition on the seabed are mainly affected by human activities such as port and waterway construction and land reclamation.Studies indicate that after dredging and excavating the harbor and waterway，the navigation channel remains stable，and siltation intensity is relatively small.A correct understanding of current and sediment environment and beach evolution in the sea area is not only a key technical issue for coastal engineering development and construction，but also beneficial for the protection of nearshore marine environment and resource development and utilization.

Abstract:To further improve the wave dissipation performance of rectangular floating breakwater，a tripod-shaped floating breakwater is designed.A two-dimensional numerical model is established based on STAR-CCM+ software to analyze the influence of draught depth，arc wall height and arc wall angle on the wave dissipation performance of the structure.The results show that compared with the rectangular box floating breakwater，the tripod-shaped floating breakwater can effectively improve the wave dissipation performance，and the transmission coefficient decreases with the increase of draught depth，arc wall height and arc wall angle.The reflection coefficient increases with the increase of the draught depth and the height of the arc wall，while the influence of the arc wall angle on the reflection coefficient is not obvious，the reflection coefficient increases with the increase of relative width.Under the conditions of wave elements studied，when the structural parameters are set to draught depth 0.2 m，arc wall height 0.05 m and arc wall angle 54 °，the transmission coefficient and reflection coefficient reach 0.11 and 0.61 respectively，in this case，the optimal parameters are set，and the wave dissipation performance of floating breakwater is the best

Abstract:To reveal the effect on tidal flowing by main dynamic factors in the Modaomen estuary，we use a method of main tidal flux algorithm to calculate characteristics of tidal flowing under different time scales in half month of flood and dry seasons，and apply the method of multiple linear regression to fit their correlation.The results show that vertical averaged velocities during ebb period in Modaomen waterway in flood season is about 14% higher than those in dry season，and only about half of those during flood period.Residual velocities in the waterway during flood season are rather large and can be ignored during dry season.There is mutual collision of rising currents between the east and west branches outside the estuary of the waterway during flood season，while both point to the direction of southwest during dry season，and residual velocities in the west branch are more than those in the east constantly.Regardless of seasons，there is a counterclockwise semi-circular flowing structure close to seabed outside the estuary，more apparently during dry season.The impact of tidal power and wind on residual currents in the waterway are small，while runoff power takes position during flood season and ignored during dry season.The runoff power is strong during flood season，and the tidal fluxes of the east branch and the west branch are consistent.During dry season，net tidal flux from the waterway is mainly transported to the east branch，following southwest coastal current and entering the western branch，and then is exported towards the south of outer sea with offshore tidal current，which is consistent with the structural characteristics of the counterclockwise semi-circulation outside during dry season.

Abstract:With the rapid development of coastal ports in Liaodong Bay，issues such as the scarcity of anchorage resources have become increasingly prominent，especially in the complex maritime conditions within the Liaodong Bay，conflicts in the use of the sea by different industries have further constrained the planning and construction of anchorages.This article conducts an in-depth analysis of ecological redlines，submarine pipelines and cables，military no-fly zones，offshore wind farms，and shipping routes in the maritime areas of Liaodong Bay.It systematically reviews and summarizes key issues related to anchorage development，including resource capacity，planning and implementation，as well as shared usage.Taking a problem-oriented approach，it proposes ideas and directions for the development of anchorages in Liaodong Bay，covering aspects such as planning，construction，and operational management.This can serve as a reference for the planning，construction，and management of anchorages.

Abstract:The substructure of frame vertical wharf in inland river hub port mostly uses steel sheathing，steel docking components，longitudinal and transverse bracing and other steel components，steel components have the advantages of high strength，good plasticity and other advantages at the same time have easy to rust，poor corrosion resistance and other problems.The hydraulic steel component rusting is a serious threat to the safety of long-term operation of the inland river hub port.In order to investigate the rusting law of hydraulic steel components in inland river hub ports under the condition of water and sand erosion，relying on a representative inland river hub port project，we carry out on-site testing for the degree of rusting of its hydraulic steel components.Through the detailed comparative analysis of the test data results of steel components with different rows，elevations and erosion directions，we reveal the spatial and temporal distribution law of the corrosion degree of different steel components，and propose an empirical rusting model of hydraulic steel components for the relying project.The results show that the rusting thickness of steel components increases with the increase of service time，but decreases with the increase of elevation.At the same elevation position，the rusting degree of components facing the water surface is more serious than that of the side water surface and the back water surface.

Abstract:A port new-town is built to expand development space of port city，stimulate its economic growth，and expand external development.Under the new development pattern of “dual circulation”，port new-towns have been undertaking a more significant development mission，and it is urgent to carry out systematic research from the perspective of planning and design.This paper takes the port new-town of Wuhan Economy and Technology Development Zone as a study case，based on the investigation and analysis，it is concluded that the port new-town has high-quality coastline and sufficient land resources，and its main development problems include low modernization level of port，insufficient development of port industry，incomplete multimodal transportation system，and imperfect urban supporting facilities.Guided by the concept of “integrated development of port，industry and city”，development goals，spatial planning pattern and overall development path are put forward with high standards，and targeted development strategies are proposed including upgrading port infrastructure，building port industrial cluster，improving multimodal transportation system，and optimizing urban supporting facilities，so as to promote the port new-town to fully integrate into the new development pattern，and provide reference for the planning and construction of port new-towns in inland port cities in China.

Abstract:To meet the target of maintaining LNG supply during the winter peak period in northern China，two LNG berths are planned for the same harbor basin in Bohai Sea.In view of the complexity and relevance of LNG ships entering and departing ports under the joint operation of berth groups，it is necessary to study the joint operation and dispatching management of two LNG berths.Taking the first LNG double berth officially put into operation in China as an example，based on the ship maneuvering simulation method，this paper analyzes the influence of LNG ship navigation on the passage capacity of the waterway and the adaptability of adjacent berths，and puts forward the priority of LNG ships in and out of the port under the operation of double berths.On this basis，combined with the characteristics of LNG double berths operation and navigation management rules，the short-term and long-term ship joint dispatching organization model at different stages are formulated.The research results can provide decision-making basis for the navigation management of LNG double berths at a single port site.

Abstract:Under the social background of promoting the carbon peak and carbon neutral，for the problem that traditional coastal protection structure cannot meet the response to climate change，biodiversity，green and low-carbon development and other prominent contradictions，we introduce a engineering solution as a new type of bionic-based protection armour unit Coastalock through a comprehensive literature research，and carry out the relevant physical model test and the verification by engineering application.The results show that the armour unit has excellent stability and wave dissipation effect，and is suitable for most of the coastal conditions.The armour unit also has significant effective carbon sequestration and biodiversity，which can assist the port and coastal engineering construction addressing climate change.

Abstract:The current code simplifies the internal force calculation of caisson members，ignoring the constraints of the superstructure on the members.We carry out the comparative analysis of transverse mid-span bending moment and support bending moment results by considering the effective constraints of the superstructure on the members with results of code calculation pattern，and compare the internal forces within 1.5l at the top of the member and 1.5l at the bottom of the member under different calculation patterns.The results show that when the upper structure of the caisson imposes effective constraints on the members，the transverse mid-span bending moment of the upper part of the caisson member can be reduced by about 36%，and the support bending moment can be reduced by about 14%，which can significantly optimize the structural design.At the same time，it is necessary to calculate the vertical strength of the members.Although the structural constraint conditions are similar to those at the bottom，due to the different load distribution，the top of the member is not suitable for calculating the internal force by using the three-side consolidation and one-side simply supported model.The internal force distribution of caisson members is uneven.The internal force of the edge compartment is much larger than that of the middle compartment，and the bending moment increases by more than 30%.It is particularly noteworthy for the design of small caissons with less than or equal to 2 compartments.In this condition，it is recommended to establish an overall model for calculation.

Abstract:LNG vessel has a high freeboard，a large outward curvature，and an asymmetrical hull center relative to the manifold center.When berthing，it encounters issues of contact points between the vessel and fender being too high and having insufficient contact area.Conventional berthing structures and facilities are unable to accommodate the berthing requirements of various vessel classes，and there are hidden dangers in berthing safety.To solve this problem，this paper carries out berthing structure design and berthing facility layout in combination with an LNG terminal in Jiaxing Port.It analyzes the compatibility between rubber fenders and the parallel length of the vessel's side by considering vessel-shore matching under different operating conditions.It is proposed to install reverse berthing components above the inner side of the berthing dolphins，optimize the arrangement of inner and outer rubber fenders to accommodate various vessel classes and ensure sufficient contact area between vessels and fenders，thus avoiding excessive local pressure on the fenders and hull damage.Physical model tests are conducted to measure the physical parameters，such as vessel motion，mooring force，and impact force to validate the rationality of the berthing components and fender arrangement，ensuring compliance with safety berthing requirements for LNG vessels.

Abstract:As an important infrastructure for the development of marine economy，the construction of fishing port lacks comprehensive standard documents.At the same time，the operating conditions of the anchoring water area and fishing wharf are more stringent than those of general port projects.So the water area layout of fishing port has a significant impact on the smooth operation in the later stage.Based on actual engineering cases，norms，local planning and standards，we summarize the construction standards of fishing port breakwaters，wharves and anchorage waters，and summarize the design ideas of fishing port construction by taking the world-class fishing port of Yangjiang Zhapo as an example.According to the local wave observation data，we analyze the characteristics of fishing port operations.On the basis of the overall planning scheme，we propose an implementation plan for ignoring northbound waves with lower shielding frequency in the near future to save engineering investment，and verify and optimize the water area layout combining with wave numerical model and overall physical model tests.

Abstract:To improve the load response study of a high pile quay structure in the actual complex operational environment，the load response of a high pile quay structure is analyzed based on the field monitoring data of a high pile quay，combined with the multi-dimensional information fusion technology of shipxy.com，field monitoring and monitoring system.The results show that the multi-directional information fusion technology can efficiently and accurately determine and identify the vessel berthing monitoring nodes，and the berthing impact forces are found to be more in line with the right-skewed log-normal distribution.The monitoring data varies significantly during the movement of the bridge and is sensitive to the location of the bridge load.

Abstract:Taking the construction project of Paipu Central Fishing Port as an example，this paper explores the influence of the planar layout of water exchange channels on water exchange through different combinations of two basic water exchange channels by using a two-dimensional hydrodynamic model and water exchange mathematical model.The results show that the arrangement of only channel 1 is beneficial for speeding up the water exchange in front of the 1 000 t fishing vessel berth，but it slows down the half-exchange period of the water in front of the berth on its left side，especially near the breakwater root.The arrangement of only channel 2 is beneficial for improving the water exchange efficiency near the breakwater root.The arrangement of both the two channels is beneficial for not only enhancing the overall water exchange capability of the medium-sized fishing vessel berthing area and the front of each berth around it，but also improving the water exchange efficiency near the breakwater root.

Abstract:Container terminal located in developing country or region，where power grid cannot fulfill the terminal power consumption，usually rely on a diesel-based power generation.The ship to shore crane operation character is a frequent fluctuated load.In some extreme condition，the operation of diesel gen-set faces a challenge because of a large inverse power feedback to the power supply system.According to the condition of the project supported，we compare different energy storage technologies，propose a recommendation that using high-speed fly wheel system and battery energy storage system(BESS) to develop a micro-grid improvement retrofit scheme to mitigate the fluctuations from the load side.We also propose suggestions on micro-grid control strategy study，interfaces for renewable power connections and interfaces between other micro-grid and distribution grid，so as to develop a modular，standardized and intelligent micro-grid configuration scheme for container terminals.

Abstract:The Shuijing Bay Beach section is a branching channel in the upper reaches of the Yangtze River，which has various navigational characteristics such as rapid，shallow，and dangerous.The difference in flow during flood and dry season causes changes in the diversion ratio and sediment distribution ratio of the main branch，resulting in unstable riverbed.By using numerical simulation combined with the initial plan for the layout of spur training dike，the navigable flow conditions and the variation laws of the diversion ratio of the inlet channel at different deflection angles of spur training dike head are studied.The calculation results of each layout plan are compared and analyzed to obtain the optimal plan for the layout.The results show that there is no positive relationship between navigation flow conditions and the deviation angle of spur training dike head，and there is a suitable range for the deviation angle of the dam head.The diversion ratio of the branching main channel varies inversely with the flow rate，and the deviation angle of the dam head has little impact on the diversion ratio of the channel.The results of this study can provide theoretical basis for the subsequent waterway regulation schemes of similar rivers.

Abstract:The main corridor water conveyance system of unilateral lock wall has the advantages such as simple structure，small amount of excavation and less investment in the project.It has obvious technical advantages in the narrow valley，steep slope and other topographic restricted areas.However，one of the difficulties in its engineering application is how to ensure the uniformity of the flow velocity in the corridor and avoid serious drift and deflow phenomena.Based on Caojie second-line ship lock project of Jialing River，this paper uses the general CFD software FLUENT to study the hydrodynamic characteristics of the bifurcation pipe in the layout of double valve water delivery system in the main corridor of the single-side lock wall in a more detailed way，and discusses the influence of the bifurcation angle of the bifurcation pipe，pier curve type and outer wall curve type on the hydraulic characteristics of the bifurcation pipe.The layout type of bifurcated pipe in the valve section of unilateral water transmission gallery with sinusoidal curve on the outer wall and arc-straight-arc curve on the inner wall is proposed，which can provide reference for similar engineering design.

Abstract:Regarding the difficult problem of plane layout in the confluence area of vertical branches and tributaries，the normal physical model is used to simulate the flow control and flow conditions for navigation in the confluence area.The inflow path of the tributary is optimized following the idea of split-flow，diversion and diffusion.The results of the recommended scheme show that when the recommended stream has no flow in main stream，the hydraulic complex can divert the tributaries according to the designed split ratio.When the main stream has incoming flow，the hydraulic complex automatically adjusts the incoming flow of tributaries cross downstream channel to join the main stream.The flow conditions for navigation in the confluence area meet the standard requirements under each working condition.The comprehensive optimization measures such as adding partition board，streamlined diversion island，diversion plate and so on can achieve the goal of flow control and improve the flow conditions for navigation in the vertical inflow confluence area.

Abstract:To the problem of difficulty in real-time quantitative monitoring of mooring forces during the passage of large ships，the mechanical model of the strain- mooring force load response of the floating bollard of ship lock is modified.Real ship tests are conducted to verify and analyze the modified model，and the measured duration curve data of mooring forces of the passing ship are collected.The results show that the modified mechanical model for the load response of the floating bollard basically conforms to the real-time trend of measured mooring force of the ship passing through the lock.The relative error between the measured peak mooring force of the ship and the model inversion calculation value is within ± 5%.The modified mechanical model can accurately predict the load situation of the floating bollard of ship lock.The research results provide a reference for the digital monitoring and engineering construction of the floating bollard of ship lock.

Abstract:The maximum navigable head of Baise hydropower station is 113.80 m.The water level of the upstream reservoir varies greatly，while the water level of the downstream Youjiang changes rapidly.The construction of navigation facilities is faced with such technical problems as navigation at high water head，saving water resources and reducing the influence on the safety and operation of the built facilities.The construction scheme should achieve the optimal coordination effect of multiple objectives，such as high-efficient navigation，reliable operation，convenient maintenance and economic investment.For the navigation facilities of Baise hydropower station，the combination of lock and ship lift，ship lift and ship lift，single-stage ship lift and multi-stage ship lock are adopted for technical and economic comparison.The combination scheme of ship lock and ship lift is recommended，which gives full play to the technical advantages of ship lock adaptation to large water level amplitude variation，large lifting height of ship lock and short time for ship lock passage.We compare and select the types of ship lift.The proposed combination scheme of ship lock and fully balanced vertical ship lift can achieve the construction objectives of efficient navigation and reliable operation.This paper puts forward a new idea for realizing high dam navigation，which has positive reference significance for the construction of similar projects and the revision of codes.

Abstract:Regarding the issue of disparate flow rates and discharge times between the upstream and downstream lateral openings of a distributed water conveyance system in a ship lock，this study relies on a mathematical model constructed based on an existing domestic ship lock.By coupling computational data with measured data，the suitability of the model is validated.The model is further modified to simulate the discharge rates of different lateral openings by adjusting their respective areas，and the discharge uniformity under various operating conditions is evaluated using variance and uniformity coefficients.The research results show that: 1) The upstream lateral openings discharge earlier，resulting in lower flow rates during the mid and late stages of water conveyance，while the downstream lateral openings discharge later but experience higher flow rates during the mid and late stages due to greater pressure at the end of the pipeline.2) The discharge uniformity exhibits an initial improvement followed by a decline with an increase in the area ratio between the upstream and downstream lateral openings.3) The area ratio of the lateral openings in the practical engineering project represents a relatively favorable scenario.

Abstract:In view of the problems that there is no longitudinal high-grade waterway in the middle of Jianghan Plain and that the Jingjiang waterway in the middle reaches of the Yangtze River is winding and has obstructing factors，thus restricting the growth of inland waterway traffic，and in order to construct and improve the regional high-grade inland waterway network，a horizontal high-grade waterway parallel to the Jingjiang waterway，namely Jingdong Canal，is planned to construct as the second waterway between Jingzhou and Wuhan.In addition，Hanxiang Canal，a longitudinal and high-grade channel connecting Han River with the Yangtze River and Xiangjiang River，is planned to be built between Shayang section of the lower Han River and Yueyang section of the middle Yangtze River.The two canals，together with the existing Jingjiang River，Han River and Jianghan Canal，form a channel pattern of “one vertical and three horizontal” in the Jianghan Plain.This paper adopts qualitative and quantitative combination，comparative analysis and other methods，considering canal construction conditions，functional positioning，river conditions，water resources，geomorphology and geology，etc. ，and proposes a route scheme with 9 steps，so as to build a canal economic belt along the route and realize the comprehensive development benefits of waterway and land resources.

Abstract:The construction and operation of a riverine hydro-junction significantly alter the hydrodynamic conditions of the waterway，potentially affecting navigation.Therefore，it is essential to study and evaluate the navigational flow conditions during different phases of the project.This study focuses on the river segment of Nanzhi Hydro-Junction in Ganjiang River.A two-dimensional hydrodynamic numerical model of the Nanzhi river segment is established to simulate the hydrodynamic processes during both the construction and operation phases.The objective is to analyze the impact of the hydro-junction project on navigational flow conditions in the waterway.The results show that during all phases，the flow patterns within the waterway are relatively smooth and do not pose adverse effects on navigation.Under most flow conditions，the flow conditions meet the navigational requirements.However，during the first phase of construction，under a ten-year return period condition，certain areas in the temporary waterway experience flow velocities exceeding the navigational flow speed control threshold of the Ganjiang River (2.00 m/s).These areas extend for approximately 2，000 meters，with a maximum velocity of 2.54 m/s.In contrast，during the second phase of construction and the operation phase，the flow conditions within the river segment meet navigational requirements.The research findings can provide reference for the safety and operational scheduling of navigation in Nanzhi Hydro-Junction of the Ganjiang River.

Abstract:Water level is closely related to the navigability of a waterway，and is particularly important for large ships(convoys)passing through certain typical sections.Water level is affected by many factors，and developing an accurate and reliable water level prediction model is a challenging problem.In this paper，a water level prediction model based on Transformer's multi-feature spatio-temporal fusion network is proposed，which is able to capture the complex spatio-temporal patterns and interactions of the water level data，study the correlation relationship between the water level and the different influencing factors，and generate the future water level prediction results based on the fused features.The research results are helpful to ensure the navigation safety of ships，give full play to the navigation capacity of waterways，and provide references for shipping management and planning.

Abstract:As a permanent hydraulic structure on a natural river，the construction of a certain dam hub will create a barrier to the continuity of the natural aquatic ecological environment of the original river，affecting the migration and reproduction of fish.To ensure the effectiveness of fish migration，it is necessary to build fish lanes on the hub.We carry out the study on the overall hydraulic characteristics of the fishway and the number and layout of its inlet and outlet under different water level combinations，in order to determine whether the design scheme of the fishway can meet the hydraulic conditions.We use a physical model test method with a scale of 1:16 to verify the reasonability of the fishway design scheme.The results show that under the recommended layout of the fishway and the implementation of water replenishment measures in the inlet section，all hydraulic indicators can meet the codes and design requirements.When the mainstream flow velocity at the entrance of the fishway is relatively low，it is necessary to adopt inlet section water replenishment measures to meet the requirements of fish-luring design.

Abstract:The condition of waterway regulation in Dongjiang River is complicated，so the model study can provide important technical support and basis for the feasibility of waterway regulation technical scheme.Through the analysis of riverbed evolution，flow condition and channel regulation model，the rationality and regulation effect of different regulation schemes are studied，and the recommended channel regulation schemes are put forward.The results show that the water depth of Lanpai Shoal，Hengling Shoal and downstream section of Guanyinge Shoal is more than 2.5 m.The water depth of Menghutiaoqiang shoal and upstream section of Guanyinge trough is less than 2.5 m.The water depth along the channel is more than 2.5 m under the designed flow，and the water level reduction value along the channel is between 0.77 and 2.26 m.After local sand mining，the water level of the upper reaches of each shoal section is reduced to different degrees，and the water depth of the trough cannot meet the requirement of 2.5 m after local sand mining.The reach is sand mining，and the influence of sand mining on channel regulation scheme is very sensitive.The recommended channel regulation scheme is adopted and the sand mining behavior is strictly controlled for the channel regulation downstream of Likou Dam in Dongjiang River.

Abstract:The forms of ships in the Three Gorges Dam area are various，the vertical drop of water level in the dam area is large，and connecting and connecting ships anchored in the river center to the shore is difficult.In order to achieve the goal of safe，standardized，convenient and efficient construction of the shore power system，and to provide replicable and extensive experience for the full coverage of shore power in the Yangtze River Basin，we propose a ship shore connection plug-in，a cross ship connection device，and a cable automatic lifting and conveying device based on the actual use of shore power by ships in the Three Gorges Dam area.The ship shore quick connection technology solves the problem of difficult access to shore power，and plays a positive role in steadily promoting shore power construction.

Abstract:With the advancement of large-scale ships，some locks are unable to meet the safety mooring of ships passing through the locks.Taking the first-line lock in Zhuzhou as an example，this paper upgrades and designs the floating bollards under the premise that the floating bollard groove remains unchanged.By changing the type of floating bollard structure，optimizing key parameters such as mooring height，pontoon diameter and draft，the mooring force is increased to 100 kN，and the height of the double-layer mooring is increased to 1900 and 3 700 mm，respectively.After finite element analysis and verification，the strength and stiffness of the mooring frame structure meet the requirements.The engineering practice shows that the boundary parameters of the modified floating bollards are reasonably matched with the size of the well，the operation is reliable after putting into operation，and the unplugging effect of the ship mooring cable is good，which can provide reference for the upgrading and transformation design of floating bollards in similar lock projects.

Abstract:Hydrodynamic flow field calculation is an important content in the research of hydraulic engineering and waterway regulation engineering.To realize independent research and development of flow field visualization and facilitate editing，a method of flow field generation and visualization based on CAD secondary development is proposed.Using the hybrid programming technology of Fortran and C#，based on dynamic link library，the secondary development of AutoCAD is carried out through the transfer of C# and Fortran parameters.This method can draw the flow field vector map and flow field cloud map quickly on AutoCAD platform，and can also represent the size of the value with different colors，so as to realize the visual editing of the flow field.The method is demonstrated and applied in Changshou River section of the Three Gorges Reservoir area，and the results show that it has a better visualization effect and practical value.

Abstract:In response to the current research and practice related to the digital transformation of coal ports，which have problems such as relatively single technology application scenarios，insufficient coverage of the entire chain and scenario，and information silos in subsystems，we carry out the construction and application of a digital twin system for coal ports.Based on a deep understanding and operational practice of coal port scenarios，we adopt key technologies such as the internet of things and system simulation to achieve data standardization and interface standardization on the basis of existing research，and propose a digital twin architecture and five dimensional model covering all elements，processes，and scenarios of coal ports.Based on the application of a coal port，the system achieves the goal of comprehensively and accurately reflecting the port operation situation，avoids coal spontaneous combustion safety hazards，and significantly improves operational efficiency.

Abstract:In response to the deficiencies and limitations of the existing engineering project presentation methods，We propose a new approach based on the open-source software Blender.Taking a waterway project as an example，we use key techniques such as aerial photography and video preprocessing，camera trajectory reconstruction，3D building information modeling (BIM) and animation creation，as well as synthesis and output.This method inserts 3D BIM/animation into aerial photos/videos and achieves the fusion of the them in multiple aspects such as perspective，material，and light-shadow through virtual cameras and rendering.This method retains the advantages of low cost，high definition，and high fidelity of aerial photos/videos，and enables the display of obstructed objects such as underwater waterway and non-existent structures such as revetment，mixer station and their construction processes through BIM/animations.With its low learning and implementation cost，this method holds strong potential for widespread adoption and can be applied in engineering project bidding，scheme evaluations，and external presentation.

Abstract:To investigate the stability influence law of different structural forms of channel skeleton bank protection structure，we select the best bank protection structure form，and carry out structural optimization of this form，combined with the actual situation of the Shahe Luohe to Pingdingshan shipping project，and establish several kinds of three-dimensional structural model of the bank protection slope by PLAXIS.The results show that among the three forms of herringbone，rhombus and arch skeleton，when using arch skeleton，the sliding damage surface range of the bank slope is the smallest，and the safety coefficient of the bank slope is the largest.When designing an arch skeleton bank protection structure，the influence of different arch diameters on the soil displacement of the bank slope should be considered firstly，and in the project with stricter control of the soil settlement on the bank slope，the different effects of different arch widths can be further considered.In the case of this project，it is recommended to optimize the structure of several kinds of berms by using PLAXIS 3D.This project suggests optimizing the design parameters of the arch skeleton bank protection structure from the original design scheme (arch diameter 2.5 m，arch width 0.05 m，burial depth 0.300 m) to the orthogonal scheme (arch diameter 4.5 m，arch width 0.05 m，burial depth 0.450 m)，while reducing the displacement of the bank slope soil，only increasing the amount of concrete by less than 55 m3

Abstract:To the repeated interaction between the clay layer with poor permeability and the sand layer with good permeability encountered in the vacuum preloading reinforcement of a port project in Bangladesh，there may be problems such as boundary permeability，complex and difficult to predict foundation consolidation laws，and difficult to predict foundation reinforcement effects.Based on the experimental and typical construction blocks of the project，this article focuses on the sealing effect of clay mixing piles on the sealing wall.The influence of permeable layers on the theoretical calculation of consolidation velocity，as well as the changes in physical and mechanical properties of complex interlayered sites after reinforcement are studied.This article mainly uses experimental detection and comparative analysis of experimental measured data and theoretical calculation data to compare and study the surface settlement time history curve，pore water pressure dissipation curve，SPT index before and after reinforcement，compressibility index，etc.The results show that clay sealing walls have good adaptability in silty sand formations，and the presence of permeable sand layers has a much smaller impact on actual site consolidation than experiments under theoretical or ideal boundary conditions.Vacuum preloading has a good reinforcement effect on complex interlayer foundations.It has certain reference significance for guiding the design of vacuum preloading reinforcement on complex interlayer foundations.

Abstract:Liantuo Channel regulation and reef blasting project is located in Liantuo River section between two dams，the main purpose of which is to adjust the reef blasting area from flat slope to longitudinal ladder slope，to expand the water flow area of the rapids thereby reducing the velocity and slope，level the shoreline，increase the depth of the shore，and adjust the river bed section shape to improve the bad flow pattern.However，the work amount of LT7 reef blasting area in the reef blasting is very large，and the work amount of single beach regulation blasting currently ranks first in the inland waterway regulation projects.This paper studies the construction layout，construction layering method and construction ship equipment selection under the deep water drilling and blasting construction，and determines the construction methods of different zones in this area.The actual effect of channel regulation shows that the channel flow condition has been improved obviously，which proves that the construction method adopted is reasonable and effective.The research results can provide a theoretical basis for the implementation of the reef blasting project in Liantuo section，and can also provide a reference for the subsequent regulation of other beach sections.

Abstract:Taking Shanxiu shiplock expansion project in Zuojiang，Guangxi as an example，this paper studies the construction technology of excavation and support of high slope of the approach channel.Combined with the actual construction site and the characteristics of the high slope of the approach channel，the excavation and support methods of the high slope construction are formulated to ensure the safety and feasibility of the project.The research results show that the stability of both sides of the slope can be solved by using this method in the capacity expansion project of Shanxiu shiplock in Zuojiang，which ensures the safety of construction and the normal navigation of the existing channel.

Abstract:In order to improve the efficiency of sand extraction in the open sea by large trailing suction hopper dredger in Xiamen Airport phase II project，we analyze soil characteristics of loading and overflow in different sand extraction areas and existing loading construction problems，and summarize main reasons for the reduction of construction efficiency in different sand extraction areas.Then we propose the optimization technology of sand extraction and loading construction in open sea according to different soil characteristics，which is verified and applied by the on-board test.The results show that there are differences in the sand extraction and loading technology of different soils.For the soil condition with easy deposition and small overflow loss，improving the flatness of cabin can effectively increase the loading soil volume.For the soil condition with difficult deposition and large overflow loss，promoting the ability of excavation is an important mean to improve the efficiency of sand extraction and loading.

Abstract:In response to the problem of damage and cracks in the pile foundation concrete of wharf that is in service for many years，relying on the hydraulic overhaul project of a certain wharf in Ningbo，we carry out the design and development of steel sleeve，grouting operation system，and ultra early strength grouting material.Combining with the construction process，we form a complete set of reinforcement and repair technology，and carry out the on-site construction and quality test.The results show that the compressive strength of the ultra-early strength grouting material can reach over 20 MPa within 12 hours，and its bonding strength with the steel sleeve can reach over 6 MPa.Other performance parameters comply with the requirements of the specification.The developed complete technology is used to successfully reinforce and repaire 232 pile foundations within 6 months.