Abstract:Aiming at the shallow water,steep slope and torrent flow of Lujiahe waterway,we probe into the train of thought on the waterway regulation.Adopting the three-dimensional numerical analysis model,we analyze the flow features and propose a preliminary plan for regulating this waterway.The research results reveal that dredging is the effective method to solve the navigation channel problem,and the research achievement may serve as reference for regulation of the pebble shoal which is characterized by shallow water,torrent flow and steep slope.

Abstract:Riprap and stone pillow are widely used in inland waterway regulation engineering,but the traditional structure is not sufficient against scouring in reaches with deep water and high velocity where the flow regime is complex.In this work,a new large wire mesh pebble bag structure is proposed to make up for the deficiency.A mechanical model is put forward to analyze the drift distance and stability and the structure’s size is studied.This structure is utilized in Zhijiang-Jiangkou waterway project and is proven effective.

Abstract:Based on the measured data of Shazhou waterway in the middle reach of the Yangtze River in recent years,we analyze the river bed evolution and navigation-obstructing characteristic of it,and according to the channel regulation planning for the Yangtze River,we propose the channel regulation idea and scheme.Combining with the mathematical model calculation,we carry out the mobile bed research on two regulation schemes.The results show that the two schemes can both guard the beach,control the left branch and stabilize the right branch,and achieve the desired regulation effect.However,scheme one is better,thus it is chosen as the recommended scheme.

Abstract:Based on the analysis of application of the D-shaped soft mattress structure in the Yangtze River Waterway Regulation Project for many years,we develop the D-shaped soft mattress structure with unit blocks and study the construction technology of it.This structure is composed of the mattress and ballast,and the concrete block is a circle.The concrete ballasts blocks are tied together by units and bound to form a piece using a polypropylene rope in series during prefabrication.The field tests show that,comparing with the conventional D-shaped soft mattress structure,the D-shaped soft mattress structure with unit blocks is safer in the process of underwater sinking,and raises the terrain’s comprehensive critical slope angle and improves the adaptability of the mattress to the terrain.

Abstract:Terrain is an important part of the regional environment,and 3D terrain analysis provides a new technical support for the study of the surface evolution process.Based on the multi-stage underwater topographic survey data of phase II project of Heisha River channel regulation,and adopting BIM technology,we realize the 3D visualization of underwater terrain surface of each stage,and carry out dynamic monitoring and analysis of it.The research shows that based on the BIM technology,we can realize the spatial monitoring of the underwater topography of the waterway,which can show the 3D situation of the regional terrain evolution and sediment deposition visually,which is of great significance for the maintenance and renovation of the waterway.

Abstract:Real ocean waves are multi-directional irregular waves,and cylinder array with two tandem rows of four cylinders is one of the common structures in marine engineering.By numerical calculation,the variation of wave run-up,wave force and group coefficient are studied for eight large-scale cylinders (the ratio of the cylinder diameter D and the wave length λ,D/λ≥0.15) arranged in two tandem rows of four cylinders under the action of multi-directional irregular wave.The results indicate that the wave directionality has significant effects on the wave run-up and wave forces.Compared with the results of single tandem array of four cylinders at the same wave conditions,the normal wave force on cylinders in two tandem rows of four cylinders decreases,and the transverse force increases.Moreover,the cylinder spacing has a complex effect on the wave action on the cylinder array.The group effects will be small and can be ignored when the distance between two cylindrical centers is ten times the cylinder diameter.

Abstract:To solve the problem of influencing mechanism of operating efficiency of different cutter structures,based on discrete element method (DEM),the factors on efficiency of reamer are investigated for different installation designs of reamer,i.e.cone reamer and crown reamer.According to the recorded data from engineering ships,the model of general reamer head is built in system of YADE which is a discrete element software,and the reliability of numerical simulation is verified as well.3D models of new taper reamer and new crown reamer are established with the help of optimizations of the available reamer heads,and then the soil cutting processes between the two types of cutter heads are compared in different working conditions.The results show that the mining efficiency of cone reamer is better than that of crown reamer in the cutting process.

Abstract:By the method of model test,we study the evolution process of high pressure flush submerged jet of trailing suction hopper dredger,and use ultra-high speed camera to study the flow pattern of high pressure flush submerged jet in static and moving state.The experiment can not only provide the jet and diffusion state in submerged state,but also provide the basis for improving the design of trailing suction hopper dredger.The results show that when the pressure of ultra-high pressure water jet increases to a certain value,the shape of the jet forms a “lotus root” distribution state with large middle and small middle parts.Under the experimental condition,the moving speed has little influence on the evolution process of ultra-high pressure submerged water jet,and improving the high pressure can effectively solve the tailing problem in low pressure.

Abstract:For the structures of permeable breakwater which are widely used in practical engineering,the relationship between the ratio of block diameter of core material to the equivalent width of dike D/Bswl and the dimensionless wave steepness H/(gT2) is analyzed through a series of sectional model tests.We propose improved empirical formulas of the transmission coefficient of permeable breakwater based on previous researches.The results and analysis show that the formula can be used to calculate the transmission coefficient of the permeable breakwater under regular waves ,and can be used for future reference in relevant engineering design.

Abstract:Field observation is carried out to measure the wave uplift load of cover plate in perforated caisson.The processes of tidal level and uplift load are analyzed by a single day,a short period and the whole period,including the load process and time duration.The statistical result of load process and time duration of elevation up by 0.5 m is compared with the original elevation.It can be found that the rising process of uplift load grows in step with the tidal level.The uplift load is induced together by the tidal level and wave action.The load order for different bins from large to small is the back,middle and front.The uplift load would be obviously improved if the elevation of cover plate is raised by 0.5 m.The elevation plays a decisive role on the state of uplift load for cover plate in perforated caisson.

Abstract:For the structures of submerged breakwater which are widely used in practical engineering,the physical model test method is adopted to study the influence of different face protection forms on the transmission coefficient of the submerged breakwater under the action of irregular waves.The effects of relative top depth,relative top width and deep water wave steepness on the transmission coefficient of the submerged breakwater are discussed.Effect of different surface blocks on wave breaking characteristics is discussed too.Then the improved empirical formulas on the basis of previous researches are proposed to provide theory reference for the design of submerged breakwater.

Abstract:According to the appearance of defects in marine environment of high durability fair-faced concrete,we carry out the drum and square model test，and study the effect of admixture on the appearance of fair-faced concrete.The results show that the fair-faced concrete with slag has more surface bubbles and larger diameter.The color of fair-faced concrete with slag and fly ash is black and dark.The bubble situation of the concrete with slag and stone powder is the same as that mixed the slag only.The concrete with slag and silicon powder has more color bright uniform,less bubble and smaller bubble size,and the overall uniformity is the best in double doped system.Compared with all other series of concrete,the concrete with slag,fly ash and silica fume has the best appearance,the color is bright and uniform,and the bubble is less.We apply the last kind of concrete to a marine environment under water concrete engineering,which achieves a good result.

Abstract:Based on the requirements of durability and bond strength of concrete,the present design codes for concrete hydraulic structures set the minimum thickness of concrete protective layers while give no requirements for the maximum protective layers.For board or beam structures with piles,to facilitate construction,increasing the protective layer is often applied to prevent the break off and bend of reinforcement when meeting with piles.Based on present standards,this paper analyzes the engineering example,and concludes that the optimal maximum protective layer over reinforcement is between 100mm and 150mm.The conclusion can be reference for future reinforcement design of port and waterway engineering works,especially the design of high pile wharf in the coastal area.

Abstract:The surroundings and geological conditions of waterfront excavation enclosure in deep riprap foundation are very complex,which are quite different from those of conventional foundation excavation enclosure.The traditional enclosure structures cannot be fully applied in the complex conditions.In this paper,the design of waterfront excavation in deep riprap foundation behind a cruise terminal is referred to solve the difficult problems of complex geological conditions,high environmental protection requirements,difficulty in waterproof technology and so on.Firstly,two excavation enclosure schemes are proposed to comparatively analyze through calculation.Secondly,based on pumping test of enclosed well,the water sealing effects of two different enclosure schemes,concluding piercing occlusion pile and piercing grouting pile together with high pressure jet grouting pile,are compared.The test results show that the piercing occlusion pile has the dual functions of supporting and water-proof curtain,and can be implemented well in waterfront excavation in riprap foundation.Then the piercing occlusion pile is determined to be excavation enclosure scheme.Finally,a model is established by the software Plaxis 2D to analyze the deformation of recommendation excavation enclosure scheme on the adjacent wharf.The design scheme of piercing occlusion pile adopted in the deep riprap layer near the sea has the characteristics of structural safety,reliability and good sealing effect.It successfully works out the difficult technical problems of construction and water sealing under the complex environment.And it can provide reference for similar excavation projects.

Abstract:In this paper,we carry out the three-dimensional finite element numerical simulation by using ABAQUS software for the piled wharf with monolithic box-slab superstructure scheme.By using ABAQUS’s unique skinning technology and user subroutine,we achieve the accurate simulation of the internal forces of the pile foundation and the dynamic loading of the portal crane load respectively,and optimize the structure according to the numerical simulation results.Comparing the results of calculation with ANSYS,and the two computed results agree reasonably well.The detailed structure simulation is more accurate and reasonable.It shows that the simulation method in this paper based on ABAQUS is more accurate and feasible.

Abstract:Chloride concentration profiles of concrete specimens with port engineering and their corresponding mortar specimens are measured and obtained during the in-site field exposed experiment,and the chloride diffusion coefficients of these two types specimens are determined by regression analysis.On the basis of the two chloride diffusion coefficients,the influences of dilution,tortuosity and interfacial transition zone effects on chloride diffusion coefficient of concrete are quantified,as well as the chloride diffusion coefficient model of interfacial transition zone of concrete is established.The accuracy of the aforementioned model is validated based on the meso-scopic numerical simulation method of chloride diffusion into concrete.Based on the analysis of the mesoscopic numerical simulation results,it can be seen that the enhancement effect of interface transition zone on chloride diffusion coefficient in concrete considering only the dilution and zigzag effects of coarse aggregate cannot be ignored.The influence of the interfacial transition zone on the chloride concentration distribution and diffusion characteristics in concrete should be considered.

Abstract:The Chinese and national codes and standards are not explicitly specified that how the effective impact energy of vessel distributes between fenders,and it is usually considered to be fully absorbed by a single fender.Taking fender selection for an oversea gravity quay for an instance,we study the possibility of multi-fender distribution of vessel effective impact energy,elaborate the effective impact energy calculation method in PIANC standard and fender selection procedure.The results show that,it is reasonable to consider multi-fender distribution of vessel effective impact energy in PIANC standard when the damage of fenders will not cause severe damage to quay structure.This design concept can reduce the energy absorbed capacity requirement for single fender,accordingly reduce cost of quay structure,it may serve as reference to quay design in oversea engineering.

Abstract:Taking a practical port project for example,we carry out a case study based on the summary and analysis of the construction condition.In view of the complicated shielding condition,we determine the specific shielding standard and select reasonable design wave elements according to the implementation schedule of surrounding works.The overall construction scheme chooses an offshore high-piled structure that requires a relatively high investment but shorter construction period.The wharf structure is firstly built and followed by harbor dredging so as to effectively reduce the construction period.The influence on pile foundations exerted by harbor dredging is analyzed by the Plaxis geotechnical finite element analysis software,and the result shows that the bending moment of the pile foundation increases significantly under consideration of the soil deformation caused by harbor dredging.The overall construction scheme for this project covering the determination of the shielding standard by stages,the deployment of offshore wharf,the filling for land area and the arrangement of constructing wharf structure first and harbor dredging followed has achieved great benefits.

Abstract:The jacket dolphin structure,as a type of lightly open wharf ,has a great potential to be used in the complex offshore deepwater environment.In order to solve the problem of diverse and reasonable selection of jacket structure,relying on the 300，000 t crude oil terminal project in Zhoushan Cezidao,a research on the structural selection of jacket pier is carried out,and the influence of structural layout factors on the performance of the optimized jacket pier is analyzed.The analysis results show that the mechanical properties of the X-shape jacket structure are the best,while the economic performance of the two K-shape structures is the best.According to the stress characteristics of offshore deepwater wharf,X-shape jacket structure is preferred.The analysis of the influencing factors of the optimal structure shows that the number of supporting layers and the slope of the measured leg column on the back sea have a large impact on the structural performance,while the height of the supporting layers has a large impact on the horizontal rigidity and a small impact on the bearing capacity.Therefore,it is necessary to optimize the parameters according to the load and deformation requirements of the jacket structure and the bottom pile foundation.

Abstract:In order to design drainage system more reasonably and simulate the storm process more accurately,we complete storm water system simulation of the SWMM method by software SSA based on Kribi port phase II project,and compare it with the rational method.The results show that SWMM method applied for storm water system simulation is reasonable,which provides job foundation for low impact development at port project in future.

Abstract:To deal with the stability problem of revetment on the soft foundation of port engineering in coastal areas,we study the application of CFG pile in revetment reinforcement of port engineering by taking a wharf engineering in Zhuhai as an example.By theoretical analysis,we prove the applicability of CFG piles in revetment reinforcement.By the SLIDE software calculation,we know that the composite foundation treated by CFG piles satisfies the requirement on the overall stability of the revetment.In order to reduce the impact of existing revetment such as the compaction of CFG pile,some engineering measures should be taken into account in the process of construction,such as driving interlace.The post-construction pile strength verification and small-strain dynamic test reveal that CFG piles met the design requirements.In conclusion,the CFG pile treated by some engineering measures can be applied for the revetment reinforcement with a satisfactory effect and good economic benefit,thus it can be widely used for the reinforcement of high-pile wharf.

Abstract:In view of the different calculation methods of foundation bearing capacity of gravity wharf in the European standard system and the Chinese standard system,the design methods and calculation models of the two standard systems are compared and analyzed,and the foundation bearing capacity of a certain engineering case is calculated under the condition of drainage.The results show that there is a significant difference between them.The European code reflects the load uncertainty through the load partial factors.The Chinese code considers the relationship between vertical stress and vertical stress of foundation bearing capacity in the calculation of foundation bearing capacity，whose result is between the results of two combinations of Design Approach 1 in Eurocode.The two combinations shall be calculated when designing by UK National Annex for Eurocode and the calculation surface shall be chosen carefully for bearing capacity calculation of gravity wharf.

Abstract:The design of bottom blocks should be paid attention to when revetment is constructed in the sloping rock foundation area in shallow water.The waves will break over the bottom blocks and the plunging breaker will drag the bottom blocks off the coast,which can lead to the instability of bottom blocks and the sliding of armor blocks.Combining with scheme design of revetment reinforcement project and the physical model of reinforcement revetment,we propose two measures to be taken into consideration in the bottom blocks design,which include increasing the bottom block weight and increasing the sea surface roughness.Lengthening the length of bottom blocks and increasing buried depth can also be used in the project when they are possible.

Abstract:Aiming at the calculation of gantry crane track beam under moving loads,based on the local elastic foundation hypothesis proposed by Winkler and the theoretical solution of this hypothesis,this paper completes the calculation and envelope diagrams at once,obtains most unfavorable load combination and position of critical section by using MATLAB program,applies this program to calculate the inter force and deformation of the beam under permanent combination of ultimate limit states,and analyzes the influence of beam-end constraint and beam length on inter force.This program has a certain guiding significance for the understanding of gantry crane track beam mechanical characteristics and calculation of practical engineering problems.

Abstract:In view that the rock quality often can’t meet the specification requirements in the overseas breakwater project,we analyze the research results on the quality evaluation methods of stone materials in foreign codes and literature.Applying the comprehensive evaluation method foe the stone quality in an overseas project,and combining with some design and construction measures,we solve the problem concerning the rock source of the project.

Abstract:The large concrete toothed spur dike was applied firstly in the deep-water channel regulation project,and the interaction between the large concrete toothed spur dike and the water flow is not clear.Through the method of theoretical analysis and numerical simulation,the paper studied the backwater characteristics of the new spur dike,the influence of the new type of spur dike on the water flow through the dam was analyzed by comparing with other dam types.Then,the paper discussed the calculation method of the water flow force of the new type ding dam by means of the representation method of the blocking flow.It is found that the new formula for the backwater of the dam can reasonably predict the backwater value of the dam,and due to the existence of foundation bed,the influence of the new type ding dam on the water flow through the dam is small.At the same time,the calculation formula of water flow force represented by blocking flow is more convenient. The introduction of the new spur dike protect water flow,sediment and the ecological balance along the Yangtze River,and the research results can provide scientific theoretical guidance to the design and application of new spur dike provides,which also has reference value to the other new structure design.

Abstract:To discuss the waterway regulation technology of the tail reach of mountainous rivers,we analyze the riverbed evolution,beach risk and sediment deposition law by taking the tail reach of Fengyi yard in Nanchong section of the Jialing River as an example,and get to know the navigation-obstructing characteristics of the reach. Adopting the river model test method,we make the regulation scheme for the dredging,damming and revetment.The test results show that the regulation effect is favorable by the implementation of the optimization scheme,which solves the navigation-obstructing problem fundamentally in the fluctuating backwater area of the tail reach of the mountainous rivers.

Abstract:The uncontrolled entry of ships from the upstream adjacent wharf into the prohibited navigation area of chongqing baiheliang inscription underwater protection project poses a danger to the traffic corridor connecting the coastal exhibition hall and the underwater protection body.In order to solve this problem,the anti-collision structure is studied.ANSYS/LS-DYNA software is used to build a nonlinear finite element model to simulate the collision process between ships and anti-collision structures.The time series results of collision force,collision energy and structural deformation under different water levels and collision angles are obtained.The multi-stage steel structure platform anti-collision facilities in the form of“group piles”are reliable,and the maximum structural stress is less than the tensile strength of steel.The structure under the collision is in a safe state,which can eventually stop the ship and protect the corridor,without damaging the urban landscape effect and coordinating with the surrounding building environment.

Abstract:The Taipingkou waterway is the first sandy micro-bend sub-river section in the lower reaches of the Three Gorges.The trough pattern of this section is severely adjusted,and the navigation conditions are extremely unstable.It has become the block for the Yangtze River trunk shipping.Taking the Taipingkou waterway as the research object,in view of the unfavorable changes in the main shoal of the Three Gorges reservoir after the impoundment of the Three Gorges reservoir,we establish a two-dimensional numerical model.The calculation results show that in the future,Yanglinji will further accumulate and squeeze the northern branch channel,and the navigation conditions will continue to deteriorate.The southern branch waters are obviously better than northern branch,and there is a trend of further development,especially the inflow process will further promote the development of southern branch.On the basis of this,from the perspective of economy,rationality and adapting to natural changes,the idea of channel improvement,we propose the related management methods with the goal of “from southern trough to southern branch”,which provides reference for the specific treatment of the river section in the later.

Abstract:The river estuary of Hanjiang River belongs to typical reaches with dams on both sides.The channel is slightly curved with a single trough.According to The Inland Navagation Development Plan of Hubei(Revised),this reach will be raised to phrase II in the 13th Five-Year Period(2016—2020).Based on river terrain data,this paper probes into the bed evolution rule,influential factors and navigation-obstructing characteristics from the bed plan,thalweg longitudinal profile and deep trough changes of the reach,and puts forward corresponding regulation solutions to navigation-obstructing shallow areas and provides the basis for the river’s waterway regulation.

Abstract:The scale of the pebble sand wave in Doulizi is large,and the characteristics of pebble transportation and riverbed evolution directly affect the evolution of the downstream channel and the channel stability.We apply the physical moving bed model experiment,analyze the measured data,and obtain the form and the motion law of the pebble ripples in Doulizi,and the influences of the waterway.The results show that，the form of pebble sand ripples is in the sand ridge stage,the wave crest and wave though are not stable,and the law of motion is obviously irregular.The pebble sand wave in Doulizi moves violently in the water-rising phase,while move lenitively in the water-falling phase,such motion law of pebble sand wave is obtained by amending previous achievements.The pebble sand wave in Doulizi has not occur in the main navigation waterway,and has disappeared before entering the waterway of Dongxikou,which generates no obvious effect on the waterway.

Abstract:For the lower degree of modularization of maritime terminals structure design,we apply BIM modeling technique to carry out the structural design based on two maritime terminals being built,including component building,parameters assignment and structural reinforcement.Structure and function check can be practiced in the model.Modulized structure design is achieved with improvement of quality and efficiency.Output includes drawings and construction scheme,and both real project and digital project are handed in.The results show that using BIM technique as modulized design methodology can evidently facilitate the design process and achievements sharing.However,no uniform standard is available for the time being,resource sharing is still hard to realize in the industry.

Abstract:To estimate the reasonable berth throughout capacity of automated container terminal,this paper proposes a multi-agent based on simulation model of automated container terminal operation system to study the relationship among the throughout capacity of automated container terminal,port service level and the number of berths.The model adopts the technology of “double trolley bank bridge(DTQC)+automatic guide vehicle(AGV)+automatic rail crane (ARMG)”.The simulation results show that AWT/AST has a significant negative correlation with berth throughput,and under a certain service level,berth throughput increases significantly with the increase of the number of berths along the shore.Based on the simulation results,the method of berth passing capacity estimation for automated container terminals is proposed,which can provide decision support for the planning and operation of automated container terminals.

Abstract:In view of the application of BIM technology in the design of reclamation projects,AUTODESK platform is adopted in the design of the Third Runway Project of Shenzhen Bao’an International Airport,which is based on the cloud-based collaborative platform and is able to combine different majors more closely,solving the problems in communication and coordination occurred in the traditional design.Besides,the three-dimensional geological model is established based on the geological data,and software Civil 3D is utilized in the detailed design of foundation trench and sea dike,which improves greatly the design efficiency and accuracy. This paper may serve as reference for promoting and appling BIM technology in the waterway engineering.

Abstract:The difficulty of seepage problem lies in the fact that the seepage point is underground and can not be directly observed.It is difficult to directly determine whether it is leaked or not,and it is also difficult to determine the specific scope of seepage and evaluate the effect of leak-stoppage measures.In a large-scale dry-construction dig-in basin project,the cofferdam leakage was discovered by monitoring anomalies (excessive displacement rate,large accumulated deformation,bubbles,water burst,etc.) and monitoring data.The seepage scope was found out by comparing the measured water levels in different cofferdam sections with each other and the theoretical water level.The effect of leak-stoppage measures was evaluated as per comparison on the daily horizontal displacement,water level of cofferdam and seepage flow before and after anti-leakage measures were taken.

Abstract:When the cutter suction dredger dredges and transports cohesive soil,the dredging pipe will be clogged easily with the cohesive soil if we don’t control properly the filling speed and concentration.So,based on the summarization of the traditional anti-clogging method,we design a special anti-clogging mud pipe and relative method for preventing and dealing with the pipe’s clogging by the methods of experiment and comparison.

Abstract:According to the clay proportion of sandy soil,the vibroflotation method can be used with vibro-compaction without backfill or vibro-replacement with backfill.For a ground treatment engineering,the appropriate construction technology and reasonable technological parameters are crucial for the reinforcement effect and the project investment.The effect of vibration density is produced by the liquefaction of saturated sand which is subjected dynamic loadings inside soil caused by vibrator.On the basis of the growth model of pore water pressure,we derive the critical liquefaction time of saturated sand,and analyze the influence factors and engineering significance of the vibration duration time.We also discuss the adaptability and reinforcement effect of the two vibroflotation technologies of vibro-compaction and vibro-replacement through the two engineering cases.Finally,according to the type of sandy soil and their clay proportion,we divide the sandy soil ground into three types,select the suited obtain construction technology for different ground types,and obtain the proper range of parameters.

Abstract:Aiming at the problem of error caused by the tedious work of tabulation and chart in traditional foundation settlement calculation methods,based on the stratified summation method of the specification,Lagrange interpolation polynomial is used to fit the e-p curve of laboratory geotechnical test.Based on the original distribution function of additional stress p at soil depth z,the relationship function between foundation settlement s and soil depth z is established,and foundation settlement is calculated.The foundation calculation depth,stratified thickness and quantity are not limited,and the error caused by the calculation depth,stratified thickness,tabulation and graph in the traditional calculation is eliminated by this method which is simple and efficient,and has a good application value in the design work of foundation project.

Abstract:Infrastructure construction is an important part of the strategy implementation on “the Belt and Road”,and dredging and reclamation are the pioneers in the construction of port terminals and other infrastructure,but the foundation can’t be directly used for the engineering construction and must be reinforced to meet the engineering needs,which is the top priority of building’s stability and safety.In view that inadequate analysis of the engineering geologic data leads to improper type selection of the dredging equipment which results in the construction delay and nonstandard quality control standards and engineering requirement lead to disapproval by the engineering consultants,and based on two cases of overseas projects on reclamation and soil improvement engineering,we summarize and analyze the latest large-scale dredging equipment at home and abroad,and discuss the development orientation of China’s dredging equipment;analyze the existing problems,solution ideas and construction techniques in the process of overseas foundation treatment,and explain international standards in the engineering,so as to provide a guidance for similar projects along the Belt and Road.

Abstract:Using historical investigation data to analyze the overall stability of the existing sea embankment,the calculated value of safety factor is often low,which is not consistent with the stability status quo.The situation seriously affects the design of the seawall reinforcement.Based on an old sea embankment stability analysis and new sea embankment design case,this paper densely distributes the spacing of investigation points of typical sections.Combined with estimation of the consolidation degree and undrained shear strength increment of the ground,this paper analyzes the shear strength of foundation beneath the embankment emphatically.On the basis of determining the stability of the status quo of seawalls,the seawall reinforcement scheme is greatly optimized,which can provide reference for the investigation and design of similar projects.

Abstract:The calculation of bearing capacity of driven pile foundation is a key part in the design of maritime structure such as pile-supported wharf and crane rail beam.With the trend of domestic engineering enterprises expanding overseas markets,engineers are required to master and exercise design methods of different countries in a short time.As to the pile foundation,there are numerous design standards and references which are not consistent with each other in detail.How to carry out such a design that can satisfy safety and economic requirements,and compliant with related regulations,is worth studying.Based on engineering experiences from the oversea projects being executed,we present a recommended design procedure and parameters for calculating driven pile bearing capacity after comparing the methods in several wide-used resources,and can serve as a reference in other oversea projects.