Abstract:The Canal Economic Zone represents an economic form that tightly integrates shipping economy with regional economy,serving as a significant measure to provide shipping support for the country’s new development pattern of “dual circulation”.Addressing issues such as unclear definition of the Canal Economic Zone,insufficient theoretical foundation,unclear operational logic,and unsystematic overall understanding,this article proposes the connotative characteristics of the Canal Economic Zone and a canal-oriented economic zone system.By employing interdisciplinary research,qualitative analysis,and case study methods,it concludes that the core content of Canal Economic Zone planning is to comprehensively develop the regions along the canal,develop canal-related industrial systems,organize production factors around the canal,and guide the agglomeration of urban and rural populations,ultimately forming a banded territorial spatial layout.The research results show that Canal Economic Zone planning should focus on six key aspects:core industries,banded space,open mechanisms,green development,county economy,and government-enterprise cooperation,to establish a canal-oriented productivity organization and territorial spatial layout model.

Abstract:Pinglu Canal is the key project of the Western Land-Sea New Corridor,and building an efficient,intelligent,green,and resilient canal is an important component of the construction of Pinglu Canal with high standard and high-quality.By planning the overall architecture of the smart canal and combining the characteristics and needs of the construction and operation management of Pinglu Canal,the smart construction and management system is proposed as a typical application scenario including “full process integration and coordination of construction and management,full cycle digital twin of progress management,full process simulation and regulation of quality management,all-around early warning and prevention of safety management,and full-link monitoring and early warning of green management”,as well as the typical application scenarios of the smart operation system,including “one-net efficient coordination of operation management,one-body seamless coordination and linkage of operation and dispatch,one-map scientific and intelligent management of locks and maintenance,one-click coordinated and connected emergency response,and one-station efficient and convenient logistics services”.Furthermore,we summarize the innovative technical features of the digital twin Pinglu Canal from five aspects of “full-factorial three-dimensional perception,full-process digital twin,full-process simulation and simulation,all-around intelligent services,and full-technology self-developed and controllable”,which can provide reference for the construction of similar smart port and navigation projects.

Abstract:The modern coastal protection systems place higher demands on the crest elevation and permeable of breakwaters.A three-dimensional numerical wave flume based on the Reynolds-averaged Navier-Stokes equations is established to investigate the wave force of submerged perforated semi-circular breakwaters under the action of shallow water waves.The results indicate that there is a phase difference between the horizontal and vertical forces acting on the submerged semi-circular breakwater,with the critical sliding moment generally corresponding to the moment of maximum shoreward horizontal force.As the perforation rate increases from 0% to 25%,the dimensionless maximum shoreward and seaward horizontal forces on the submerged semi-circular breakwater decrease by 27.8% and 39.8%,respectively.With decreasing wave period and increasing submergence depth,the seaward sliding force on the submerged semi-circular breakwater increases.Empirical formulas provide conservative estimates for the total force on unperforated semi-circular breakwaters under long-period waves and extreme submergence conditions,and further overestimate the wave forces on submerged perforated semi-circular breakwaters.

Abstract:Wave is the main environmental load for pile-supported wharf (PSW) in deep water area.Investigating the dynamic response characteristics of PSW-seabed system under wave action is the basis of dynamic design for deep water port.In this paper,a 3D finite element model of wave-PSW-seabed is established by ADINA.Pore water pressure and acceleration of seabed around pile,deck displacement,as well as dynamic water pressure time history of pile shaft under wave action are obtained.The dynamic response characteristics of the PSW-seabed system are analyzed,and the influence of the changing wave period on the dynamic response of this system is discussed.The numerical simulation results show that:1) there is no cumulative effect on pore pressure around pile under wave action;2) Dynamic water pressure of middle pile is significantly greater than that of the side pile;3) Amplitudes of seabed pore pressure,seabed acceleration,and dynamic water pressure attenuate along the wave propagation,and the smaller wave period,the more significant the attenuation effect.The modeling technique involved in this study can provide reference for similar PSW numerical simulation under wave action,and the investigation results can provide support for dynamic design of PSW-seabed system.

Abstract:Tidal asymmetry exerts an influence on nearshore material transportation and geomorphic evolution.Based on the Delft 3D FM,a two-dimensional hydrodynamic model is employed to establish the tidal movement simulations of Lingding Bay under the conditions of 1 970 s,2 010 s and the 2016 governing guideline shoreline.The response of tidal asymmetry to the seaward advancement of the shoreline in this area is analyzed by combining the reconciliation analysis and the skewness calculation method.Furthermore,the mechanism underlying tidal asymmetry change is examined by analyzing the contribution of different tidal constituent combinations.The research results show that the tidal height asymmetry between spring and neap tides in Lingding Bay varies.The seaward advance of the shoreline strengthens the flood tide dominance in tidal asymmetry.The seaward extension of the shoreline increases the tidal amplitude of the shallow water components while reducing the amplitude of the astronomical components,concurrently accelerating the tidal wave propagation speed.The contribution of the astronomical tidal components to tidal asymmetry gradually decreases upstream,whereas the contribution of the shallow water tidal components gradually increases.

Abstract:To accurately evaluate the bending capacity of corroded reinforced concrete beam,we take three corroded reinforced concrete beams of prototype members as research objects,carry out the bearing capacity test and simulation analysis,and put forward a simplified calculation method for bearing capacity of corroded reinforced concrete beam with modified code.By using this method,the average cross-section corrosion ratio of all the steel bars in the same section can be converted from the corrosion ratio of one or several steel bars detected in the field,which can be used to calculate the strength utilization coefficient of the corroded steel bars,and solve the problem of inaccurate calculation of the bearing capacity when the cross-section corrosion ratio of the steel bar is greater than 10%.

Abstract:To ensure the long-term operational safety of frame-structure vertical wharfs in inland waterways,it is crucial to conduct monitoring and inspection of their service performance.The placement and scheme of monitoring sensors directly affect the accuracy and reliability of monitoring results.Therefore,sensors should ideally be positioned within the structural load sensitive areas.However,due to the complexity of frame-structure vertical wharfs and the large number of load combinations,the locations and distributions of structural load sensitive areas under the most adverse load combinations remain unclear.To address this issue,this study,based on a large inland hub port,establishes a three-dimensional numerical simulation model of a frame-structure vertical wharf segment.By developing an algorithm to identify the most adverse load combinations for critical structural components,the most adverse load combinations for each component are determined.On this basis,the distribution patterns of load response points and the ranges of sensitive areas under the most adverse load combinations are identified by using finite element numerical simulation.The results indicate that under complex load combinations,steel components of frame-structure vertical wharfs exhibit greater load sensitivity compared to concrete components.The sensitive areas of steel components are primarily located at the junctions of high and low water levels and the cantilever ends of the front-row steel mooring structures.This study addresses issues such as redundancy and ineffectiveness in monitoring point placement,providing a theoretical basis for the deployment of monitoring sensors in inland hub port wharfs.

Abstract:To the issue of increased port stay times for harbor vessels due to wind avoidance and evacuation from docks,research is conducted on the emergency mooring standards of sea vessels at docks under the influence of wind and current.Based on the General Layout Design Code for Sea Ports,Load Code for Harbour Engineering,and the design standards for dock mooring lines and collision prevention facilities,force factor analysis methods and wind-current load coupling calculation methods are used to determine the emergency wind avoidance standards for harbor vessels at docks.Taking a coal dock on China’s coast as an example for illustrative analysis,the results show that the representative ship types can safely moor and evacuate under wind-current coupling conditions.The conclusion is that a 35,000-ton bulk carrier should evacuate the dock in 9-level winds,and a 50,000-ton bulk carrier should evacuate the dock in 8-level winds.The research results can help address the issue of increased port stay times for vessels due to wind avoidance and evacuation from docks and can provide support for determining the emergency wind avoidance standards and emergency plans for harbor vessels at docks.

Abstract:Taking a dock project on the left bank of the Beijiang River as an example,the finite volume method is used to establish the one-dimensional hydrodynamic model for the 37.0 km long section of the Shaoguan (II) hydrological station to Mengli hydropower station,and the two-dimensional hydrodynamic model for the 4.6 km long section of the project.A quantitative study is conducted on the differences in flood level,flow velocity distribution,and flood storage capacity of river channels under different construction schemes.The results show that when the flood frequency ranges from once every 50 years to once every 10 years,the increment of flood level is lower than 0.02 m under different schemes.The changes in flow velocity and pattern are mainly concentrated in the local river section from 100 m upstream to 260 m downstream of the dock.However,the changes in high flow velocity areas of the river are relatively small,as well as the changes in the dynamic axis of the main channel.Meanwhile,the actual flood storage capacity of the river has increased under the action of dredging in the harbor.From the perspective of flood safety and cargo safety,scheme 2 is a recommended plan,and relevant research methods can provide scientific reference for similar dock construction plans.

Abstract:Among the four major systems in automated terminals- seaside loading and discharging,horizontal transportation,yard handling,landside collection and distribution-the yard handling system presents the greatest difference across terminals.The Chinese port industry continues to innovate in yard layouts,based on the “vertical layout + end interaction” mode and the “horizontal layout + gate control” mode,introducing innovative transfer modes as well as “vertical layout + U-shaped channel” design.Through data gathering from automated terminals with varied yard configurations that have been put into operation,this study analyzes the characteristics of different yard layouts in terms of key indicators such as safety,land utilization rate,operational efficiency,automation level and energy consumption per TEU.It explores the establishment of a comprehensive evaluation system for the layout of automated terminals,providing a thorough and impartial assessment of various layout patterns to guide the construction and operation of automated terminals.The study also discusses the yard layouts for currently envisioned automated terminals.The research results have reference value for the layout planning and design of new automated terminal yards and the automation upgrading or renovation of traditional terminals.

Abstract:It is one of the important measures to ensure the overall safety and stability of the main structure of the straight wall wharf,the wave bottom current in front of the wall and the disturbing and scouring action of the propeller jet are two main factors considered in the design of the bottom protection structure.At present,the current design code for water transport engineering in China is comprehensive in the design ideas and methods of bottom protection structure with wave bottom current scouring in front of the wall.However,there is a lack of explicit calculation method for the scour caused by propeller jet and the design of bottom protection structure.This paper compares and analyzes the differences in the design of the front bottom protection structure of the straight wall wharf between the domestic and foreign codes,verifies them with engineering examples,and compares them with actual testing results.It explains the severity of the damage to the foundation bed caused by the jet erosion of the ship propeller in the ro-ro wharf and the importance of the bottom protection structure design,providing reference for the revision of relevant standards and regulations.

Abstract:The integration of cruise ship terminals and ferry terminals has gradually become a development trend to promote the efficient and intensive utilization of the Huangpu River shoreline.However,there are significant differences in the functions and service objects of the two types of terminals,and there are many difficulties in sharing berths.Taking Xuhui passenger terminal as an example,this paper proposes solutions to difficult problems such as overall layout,traffic flow,and freeboard height difference of barges.By comparing and analyzing the operating methods,design ship types,and usage requirements of two types of terminals,this paper proposes a management model of shared berths and staggered operation.The use of continuous pontoon layout and the addition of non horizontal steel approach bridges in the water area plane makes the traffic flow flexible meet the needs of different passengers.The land plane integrates functional zoning,although the land is small and the layout is compact,the functions are clear and the flow lines are clear.This paper proposes hydraulic device adjustment measures to solve the problem of freeboard height difference of barges.The shoreline and land resources of the Huangpu River passenger terminal can be highly intensive by sharing cruise ships and ferry berths.

Abstract:The phenomenon of backwater is commonly observed in major rivers and lakes worldwide,often leads to upstream water stagnation and increasing the risk of flooding during high-water periods,which threatens lives and property of people living along the riverbanks.The complex variations in river flow movement characteristics caused by backwater effect,influenced by numerous factors,studying its hydrodynamic patterns and impacts is crucial for flood control,port and waterway development,and comprehensive basin management.We preliminarily analyze and summarize domestic and international research findings in this field,focusing on three aspects,such as the fundamental characteristics and influencing factors of rivers affected by backwater,the hydrodynamic responses of rivers to backwater,and methods for quantifying the degree of backwater influence on water flow.Additionally,we analzye research gaps and trends,propose key directions for future research,which can provide insights and references for studying river flow movement characteristics under backwater effect and comprehensive regulation.

Abstract:In recent years,with the rapid development of shipping economy,waterway regulation projects are frequent in the Yangtze River basin.Although waterway regulation projects can improve flow conditions,they also have a certain impact on fish habitat.To explore the impact of different waterway regulation projects on fish habitat,we take Luoqi Reach of the upper reaches of the Yangtze River as an example,and use numerical simulation method to compare and analyze the changes of habitat suitability of Four Major Chinese Carps before and after the waterway regulation project from the perspective of ecology and hydraulics.The results show that after the waterway regulation project,the very suitable area ratio of fish habitat increases by 1.21% at most,and the unsuitable area ratio decreases by 1.85% at most.Moreover,with the increase of water level and flow,the sub channel upstream of Luoqi will produce a suitable habitat environment for survival.

Abstract:When the ship lock is connected to the navigation tunnel and directly draws water from the tunnel,a significant unsteady current will be generated in the tunnel,which will greatly affect the safe navigation of ships.In view of this arrangement,we propose a concept of ship lock tunnel type of approach channel.Relying on the newly built ship lock project of the Baishi hydropower station in Qingshuijiang,Guizhou,we use a 136 normal overall hydraulic model and a combination of remote-controlled self-sailing ship models to study the navigation flow conditions and ship navigation parameters of the tunnel type of approach channel of various cross-section scales when the ship lock is filled and emptied with water，and propose the safe and economical cross-sectional dimensions of the navigation tunnel and the ship navigation parameters in the tunnel.The results show that the safety of ship navigation in the tunnel is determined by a flow velocity of no more than 0.5 m/s,a water level fluct of no more than 0.5 m,and a rudder angle of no more than 25°.The recommended clear width of the Baishi ship lock navigation tunnel is 22 m.

Abstract:In the context of the double-lane ship locks sharing approach channel project,unsteady flow is prone to occur in the approach channel during lock discharge,causing turbulence in the flow field inside the approach channel,seriously affecting the safety of ship navigation and docking in the approach channel.Taking Mujing ship lock as an example,based on the RNG k-ε turbulent flow model,the navigation hydraulic characteristics of the approach channel are numerically simulated,and the unsteady navigation conditions inside the second-lane lock and the approach channel are analyzed during the discharge of the first-lane ship lock.The results show that when both sides of the first-lane ship lock release water simultaneously,the flow velocity in the approach channel does not meet the requirements of ship navigation and docking,and the formation of reflux,oblique and transverse flow patterns at the front of the separation dike of the second-lane ship lock affects the safety of ships entering and exiting the second-lane ship lock.After adopting the recommended side discharge method,the flow pattern in the approach channel has been improved,and the navigation flow conditions meet the requirements of safe navigation.The research results can provide a solution for the discharge method of double-lane ship locks.

Abstract:To the limitation of various factors such as river terrain conditions and overall layout of a ship lock,the upstream approach channel obliquely passes through the mainstream of the river and has a large intersection angle,and the lateral flow velocity of the navigable water is high.Numerical simulation and hydraulic model test are used to observe the overall upstream flow conditions of a newly built lock,and the optimization engineering measures combining the adjustment of the upstream route and the cutting of the convex bank are proposed and analyzed.The results shows that the above measures can effectively improve the navigable water flow conditions in the upstream approach channel,with a significant reduction(about 33%)and a decrease(about 69%)in the number of flow velocity values and measurement points in entrance area exceeding 0.30 m/s compared to before optimization.The research results can provide reference for similar projects.

Abstract:The Mangdantan channel,consisting of three continuous branches,locates in the middle and lower reaches of the Nujiang River with bad flow condition.To investigate the natural navigation obstruction characteristics in Mangdantan continuous branching channel,the influence of different discharges in normal and dry period on the flow diversion,gradient,water depth condition and current speed distribution are numerically analyzed by the two-dimensional planar hydrodynamic model.The results show that the natural navigation obstruction characteristics include large gradient,insufficient water depth and rapid current speed.In addition,the flow condition in the branches R1-L2-L3 is better than those in the branches R1-R2-L3,therefore the branches R1-L2-L3 are suggested to be developed as the navigation channel.The research results can provide technical support and theoretical guidance for the regulation of Mangdantan and the channel development of similar continuous branching rivers.

Abstract:In response to the comprehensive characteristics of multiple branching and large flow of the Heishazhou waterway,as well as the complex flow of the tidal river section in the lower reaches of the Yangtze River,the hydrological observation data are analyzed and summarized.Combined with the on-site practical work of the second phase of waterway regulation project construction,in-depth research is conducted on surface velocity and flow direction measurement,gradient observation,hydrological section measurement,etc.in hydrological observation.Modern new equipment and technology are used to optimize the layout of hydrological sections and water gauge positions,efficiently organize and implement,improve work efficiency,and obtain complete and detailed hydrological observation data.This method effectively solves the problems existing in the hydrological observation of the tidal reach of the lower reaches of the Yangtze River,and provides reliable basic data for the project design,construction and related thematic research.The research results can provide reference for similar projects.

Abstract:The riverway conditions of the Huangpu River are complicated with many river bends,while Lujiazui Bend owns the largest curvature together with the smallest turning radius of the waterway among all the river bends of Huangpu River.With the rapid growth of the number of navigable ships in the Huangpu River,the silting of the beach near the convex bank of the Lujiazui Bend has a certain influence on the safe navigation of passing ships in recent years.Viewing platforms,regarded as urban reception halls of Shanghai,are set along Luijiazui Bend.Adverse impacts will be resulted from safety incidents in case.Therefore,we analyze the hydrological and sediment characteristics of Lujiazui Bend of Huangpu River,and historical changes of river regime as well as navigation characteristics of ships and surrounding restrictions,and propose the waterway layout and regulation measures in Lujiazui.The results show that cutting and widening the convex bank shoals on the east side of Lujiazui can slove the narrow problem of navigable waters of the bend,and improve the bend navigation environment for ships.

Abstract:After the 175 m water storage operation of the Three Gorges project,the scale of Jiulongpo to Chaotianmen reach cannot meet planning requirements.During the sedimentation period,the sediment is washed up and down,and the erosion is not timely,causing shallow navigation obstruction in the channel.The channel regulation of this reach is carried out from 2016 to 2020 to improve the channel scale of the engineering reach and curb the adverse development of channel conditions.After the completion of the project,the improvement effect is analyzed through regular observation.The results show that the river regime in the engineering reach is stable,the scale of the channel is significantly improved,and the unfavorable development trend is curbed,resulting in effective improvement of the channel conditions,achieving the goal of channel regulation.

Abstract:Research and practice on maintenance and dredging engineering are conducted to address the navigation obstacles faced by the Xiaziliang shoal section of the Three Gorges Reservoir’s variable backwater area during dry season,such as bends,narrowness,rapidity,and danger.It is found that the overall trend of this beach section is slow and continuous sedimentation by collecting a large amount of historical measured data and comparing and analyzing the changes in isobaths and erosion and sedimentation over the years.On the basis of the waterway conditions and water characteristics of this river section,the construction equipment and the water level are compared,and a reasonable maintenance and dredging plan is formulated.Implementation results of the project indicate that the maintenance and dredging project can improve the conditions of the waterway,expand navigable waters,and reduce the difficulty of ship operation,thereby ensuring the smoothness and safety of the waterway.

Abstract:High pile structure is a kind of structure widely used in port and coast.Its dynamic response under wave action is the key factor to ensure the stable operation of the wharf.The software ABAQUS is used to build a three-dimensional wharf model and a wave flume with STAR-CCM+.The k-ε turbulence model and volume of fluid (VOF) motion interface tracking method are used to simulate waves,and the simulation of bidirectional coupling between wharf pile groups and waves is realized.Since the ratio of pile spacing to pile diameter is greater than 4,the interaction between piles does not need to be considered,and the error of the comparison model test is less than 5%,which can meet the requirements.The results show that the maximum force and displacement of the wharf pile groups under wave heights of 0.3 m,0.4 m,and 0.5 m can meet the code requirements.The displacement at the top of the pile is the largest,which is 0.66 mm.The maximum stress occurs at the bottom of the front row of piles in the pile group,which is 152.4 kPa.The concrete in the pile bottom area is prone to instability and failure,and special attention should be paid in practical engineering.

Abstract:Scour protection is one of the important issues that need to be faced in the design and maintenance of dock pile foundations.This article explores the feasibility of using solidified soil for pile foundation erosion protection,that is,using engineering construction soil to add suitable solidification agents to form solidified soil,covering the scouring area of bridge piers in an appropriate way,enhancing the anti erosion performance of the bed surface,and thus playing a protective role.This article conducted targeted physical model experiments and numerical simulations on the flowability,shear strength,and erosion resistance of different solidified soil formulations.The experimental results show that the collapse diameter of solidified soil increases with the increase of soil to water ratio,and the fluidity of solidified soil decreases rapidly with time.The shear strength of solidified soil slowly increases over time,and as the ash to soil ratio increases,the strength of solidified soil will also increase accordingly.The overall resistance of solidified soil to water flow erosion is good,and it can be used as a new type of erosion protection material.In underwater environments,the strength of solidified soil also increases over time,and its durability is good.

Abstract:multi-beam echo sounder system is used to monitor short-term erosion and sedimentation changes in the offshore area of the logistics park embankment in Binhai Port.It is found that there is an east-west oriented scour hole on the outer side of the embankment corner,which is about 570 m long and 110 m wide,and its edge has reached the bottom of the embankment,posing significant safety hazards.Through the analysis of monitoring data from May to November 2023,it is found that the edges of the scour hole continues to erode and showed no signs of slowing down.The research results provide accurate data support for subsequent embankment projects.The multi-beam echo sounder system can accurately identify the spatiotemporal changes in underwater topography,offering effective reference for similar embankment deformation monitoring.

Abstract:Coral reef sand,due to its special engineering properties such as fragility and high compressibility,differs from conventional sand.During impact pile driving,the process can easily cause complex changes in coral reef sand particles,such as breakage and shear,leading to pile running.Unanticipated pile running,especially over long distances,not only increases the difficulty of pile driving control but also poses high construction risks.Therefore,there is an urgent need for an analysis method to predict the depth of pile running in deep coral sand formations to guide pile driving control and reduce construction risks.In this paper,high strain pile tests are conducted in deep coral reef sand formations based on actual engineering scenarios.The analysis of soil resistance values in pile running conditions in coral reef sand is carried out,and a method for predicting the distance of pile running in coral reef sand formations is proposed.Furthermore,the pile driving control method that considers the risk reduction of pile running is proposed,and it is applied to 602 driven piles on-site for risk prediction of pile running and pile driving control,and the laws of pile diving in coral reef sand stratum are summarized.

Abstract:To study the flow field distribution and particle trajectory of reamer for a cutter suction dredger working at different rotational speeds and traversing velocities.In this paper,a unidirectional fluid-solid particle coupling numerical simulation of the excavation process of a certain type of reamer is carried out.The flow field are solved using the Eulerian description and the soil particles are tracked using the Lagrangian description to obtain the flow field distribution pattern and particle motion trajectories for the corresponding operating conditions of this reamer.The results show that when the rotational speed is 30 r/min and the traverse speed is 0.50 m/s,the reamer flow field is most stable and particle suction efficiency is higher.The research in this paper has certain reference value in understanding the working principle of the reamer,optimizing the cutting effect and other aspects.The research results can provide reference for the optimized construction and future promotion of the reamer for cutter suction dredgers,so as to better meet the engineering needs in practical applications.

Abstract:During the construction of large open sea ports,complex site conditions and numerous engineering vessels make it challenging to monitor the ships in real-time across a large area.We integrate building information modeling (BIM)+geographic information system(GIS) technology with ship positioning data of automatic identification system (AIS) to enable real-time 3D visualization of geographic information,dynamic ship tracking,and safety warnings.On the basis of a large-scale open sea port engineering,we carry out exploration and verification of two-dimensional,three-dimensional data display and spatial analysis,real-time monitoring and early warning of ships.The results show that BIM+GIS data fusion application in the ship monitoring significantly improves real-time monitoring capabilities of ships and provides valuable decision-making support for project management.

Abstract:For the problem that the required net positive suction head (Nr) of a high-pressure flushing pump in a large trailing suction hopper dredger is too high under the light-load and large flow rate conditions,the impeller is optimized to reduce the critical Nr while maintaining the original hydraulic performance.In this study,numerical simulations of the cavitating flow in the high-pressure flush pump before and after optimization are carried out by CFD technology,and the key performance parameters as well as the cavitation flow field are compared for the large flow rate conditions.The results show that the critical net positive suction head point is reduced from 10.47 m to 6.03 m under the large flow rate flushing condition by enlarging the suction diameter and modifying the blade while the hydraulic performance in the four conditions is maintained to meet the desigh requirement,which means the cavitation performance of the high-pressure flushing pump has been effectively improved.

Abstract:The construction of China’s inland river locks in the central and eastern regions is a complex process due to factors such as topography,geological conditions,structural construction,and foundation seepage control.However,there is limited research on high steep slope support technology for locks rebuilt under these complex conditions.This paper focuses on the reconstruction of the Hongjiang hub lock project in Hunan province,which has a 27 m high head difference.It proposes a combination of support technology,namely “frame lattice beam + prestressed anchor cable,”to address the stability issues faced during high slope construction in a complex environment.The safety and stability of the high slope are analyzed through the deformation of the slope surface settlement and on-site testing of the anchor cable’s internal force.The effectiveness of the protection technology is evaluated.The research findings demonstrate that after the adoption of the support technology,the maximum daily settlement deformation of the high slope of the lock is 0.34 mm/d,and the maximum cumulative settlement is 8.3 mm,which is far less than the alarm value of 3 mm/d and 20 mm.The “frame lattice beam + prestressed anchorcable” combination primarily bears tensile force,which remains within the design limit of 1,000 kN.The support structure’s design layout for the high slope of the lock is reasonable,effectively preventing slope wedge slippage and ensuring the high slope’s safety and stability.The research results can provide reference for similar projects.