Abstract:Based on the bed evolution analysis and river model test,we study the hydro-dynamic characteristics of Shuangjian shoal beach protection engineering in Fujiang shoal reach.Analyses of riverbed evolution indicate that Shuangjian shoal is located in the reach with multi-level branches,the body of Shuangjian shoal is often scoured and deposited,the head of Shuangjian shoal moves forward and backward frequently,which are both the key factors influencing the steadiness of the channel condition and the change of scour and silting in each branch.Through the analyses of tide level,velocity and diversion ratio,etc.,the protecting effect of the “herringbone” shaped protection engineering recommended by the preliminary research,the influence on the river regime,flood control,and surrounding areas are all studied.The results show that,after implementing the beach protection engineering,the beach ditch is blocked off,and the beach flow is decreased,Shuangjian shoal and the pattern of the swale are stabilized gradually,which can improve the channel condition and lay a foundation for the 12.5 m deepwater channel selection and regulation.

Abstract:According to the measured data of deep water channel from Taicang to Jiangyin,we calculate the seasonal characteristic value of tide level and cumulative frequency of the high tide level,discuss the water depth of the seasonal designed navigable stage,and propose the variable depth of seasonal maintenance dredging plans.

Abstract:In view of the present shoaling calculation method in the Code of Hydrology for Sea Harbor,a practical calculation method (PCM) of wave shoaling was proposed in the partⅠof this paper.It was used for the shoaling calculation of a cnoidal wave propagating in a straight line.On the basis of the research in the partⅠ,wave refraction caused by variations in bathymetry is considered.Thus,the PCM method is extended to be able to compute shallow wave parameters over slowly varying bathymetry.In the final section,a numerical example is given.It is solved with the PCM method under different external factors conditions (ideal condition,wind,bottom friction and wind & bottom friction) separately.The results are compared with those obtained via the commercial software DHI-MIKE21,and proved to be in good agreement in terms of wave parameters values.

Abstract:Using JONSWAP spectrum,the experiment on the whole physical wave model of revetment structure of Dalian offshore airport artificial island is carried out with different wave direction.Experiments show that the designed slope revetment types can keep stable in the case of extreme high water level and wave return period of 100 a and 200 a,when the bottom-protecting rubble,breast wall and accropodes in the eastern,northern and western of revetment are respectively 3 t,5 t and 7 t.The experimental results provide a scientific basis for optimizing the artificial island revetment structure.

Abstract:In the marine environment far from the mainland,there are some problems when placing traditionally vibrated concrete because it requires compaction by vibration in its forms.However,bad compaction qualities often cause durability problems.High fluidity concrete can properly flow into all corners of the mould and fill the framework without any or only a few additional compaction efforts,and hence is conducive to environmental protection and sustainable development.The slump flow and T500 of fresh high fluidity concrete were tested,and in the meanwhile the yield stress and plastic viscosity were measured by using viscometer.The results indicated that yield stress and plastic viscosity increase with water adding time,while slump flow declines with water adding time.The yield stress increases with silica fume content.The plastic viscosity declines at first and then increases.Besides,the yield stress was found to have a strong linear correlation with slump flow.The yield stress declines with slump flow according to this study.

Abstract:From the influential factors of the estuarine and coastal suspended sediment concentration,and based on the field data,the author analyzes the change laws of suspended sediment concentration and establish a three-dimensional high-precision numerical model of suspended sediment concentration change and multi-factor response.On the basis of the measured flow,sediment and wind data of Huangmao waters in Nov.15-19,1992,the author verifies the model.The results show that the model can simulate the flow and sediment movement with stable calculation and high precision.The verified results of flow and sediment movement can basically meet the requirements of precision.

Abstract:The application of migrating corrosion inhibitors (MCI) is one of many methods of protecting reinforced steel in concrete structures,but the migrating ability is limited for dense concrete.The inhibition behavior of 3 kinds of migrating organic corrosion inhibitor (MCI) was investigated for reinforced steel rebar in simulated concrete solutions with Cl- through polarization curve and polarization resistance measurements.The permeability of BE in concrete specimen and its effect of inhibiting rebar corrosion were also investigated.The results show that BE is a mixed inhibitor,with inhibiting anodic and cathodic process of rebar simultaneously,and has better inhibiting effect for rebar than two marketable MCI’s from abroad.Electric field can accelerate BE to permeate into concrete,and thus it has better inhibiting effect for rebar.

Abstract:This paper sets up a two-dimensional current numerical model using the MADI finite difference method,applies the moving boundary to solve the problem of mobile boundary with the water level,and conducts a numerical model to simulate tidal current of the engineering area.In order to research further the tidal field research,this paper uses two sets of grid computing solutions and refined grids.The result and its verification show that the calculated process of the tidal level and current coincide fairly well with the field data,and it provides a scientific basis for the development of Hailong bay.

Abstract:Impressed current electrochemical chloride extraction is effective enough to eliminate the harmful chloride ion in concrete,but it has shortcomings of not applying to the prestressed reinforced concrete structure,being likely to cause the danger of hydrogen embrittlement and decrease bond stress,being inconvenient in installation construction management and needing professional personnels to operate during field desalination.The way of using sacrificial anode electrochemical chloride extraction to move out harmful chloride ion in the reinforced concrete can overcome the above disadvantages,and it is not only suitable for ordinary concrete,but also suitable for prestressed concrete.This paper studies the influence of sacrificial anode electrochemical desalting effect from three aspects including conduction time,desalination device location and sampling depth.The results show that the sacrificial anode electrochemical chloride extraction can effectively remove the chloride ion in the concrete out of the active filler material after 3 months,and at 500 mm from the anode with the highest the desalting efficiency.This method can remove harmful chloride ion out of the concrete sample,and concrete specimen surface desalting efficiency can be raised up to about 60%.

Abstract:When the car dumper operates,it requires fast and accurate train location.This paper proposes a multi-group opposite type laser photoelectric sensor installed in a fixed position,which needs target location to achieve fast positioning.This system guarantees the precise positioning using the encoder,high-speed counting module,simulation system output module,inverter and other components.

Abstract:This paper introduces the seismic design method of the sheet-pile quay in the United State and clarifies the difference between it and that stipulated in the Chinese code.It is indicated that great differences between the seismic design methods of sheet-pile quay for the two countries lie in the definition of the seismic coefficient,determination of dynamic earth pressure and its position,consideration of water state for the submerged backfill,computation of internal bending moment of sheet-pile wall and pull force of tie rod,as well as the quantification of soil parameters and safety factors.

Abstract:The wave is the main dynamic factor in design of revetment engineering.In practical projects,the steep slope is formed by dredging and it makes a significant change in the wave form,which produces a different impact on the revetment structure.In order to explore the regularity of wave overtopping and wave pressure under forces of different wave forms,we measure the wave height,overtopping and wave pressure of slope revetment in a wave flume to study the influence of steep slope and mild slope on the revetment.The results indicate that the impacts of wave on the revetment differs a lot with the steep slope and mild slope.For the steep slope,waves are mainly broken on the middle of the revetment.While for the mild slope,waves are mainly broken on the upper of the revetment.The wave height,overtopping and uplift wave force of steep slope are relatively smaller than those of the mild slope.But the horizontal wave force is larger than that of the mild slope.The measured horizontal force is much larger than the calculated result by the design code because of the influence of arc section while the uplift force from the test is close to that calculated by the code.

Abstract:Based on the criterion of Miner linear cumulative damage,we propose the specific implementation steps of fatigue analysis of the mooring line and anchor chain when only considering pontoon mooring devices’stress changes of mooring line and anchor chain as main factors causing the fatigue damage.Based on one slop wharf project in the inland river,we calculate each mooring line and anchor chain’s average daily stress-duration curve within the scope of the whole fatigue life period under the four kinds of random process.Taking these stress values as samples,we calculate to get the cumulative fatigue damage of every one,and predict the fatigue life.The fatigue analysis method can not only provide a strong technical support for the safety hidden dangers’rectification of pontoon mooring devices in the inland river,but also provide technical reserves for new wharf engineering projects in the inland river.

Abstract:Combining with actual characteristics of Chinese ports,we discuss the connotation and features of green and low-carbon port,establish an evaluation index system including four categories of indexes,i.e.comprehensive indexes,systematic indexes,managerial indexes and characteristic indices,and propose a set of simple and practical evaluation methods and standards.Taking Guangzhou port as a study case,we carry out an empirical evaluation of current development level in 2013 and planning level in 2016 and 2020 respectively,the scientific validity of which is verified.

Abstract:The calculation method of PIANC standards for vessel effective impact energy is described in detail and compared with the Chinese standard.The comparison results reveal that PIANC is a higher standard comparing with the Chinese for effective impact energy calculation,which considers influential factors including the softness factor,berth cushion factor,eccentric coefficients,as well as the added mass factor.Compared with Chinese standards,the key difference depends on the added mass coefficient Cm.The ratio of results based on the two methods is close to Cm.Meanwhile,PIANC requires that the abnormal berthing condition shall be considered and its impact factor is 1.1 to 2.0.In addition,there are some differences between PIANC recommended values for berthing velocity and that of Chinese standards.

Abstract:The sheet-pile quay is an important port structure only used in the small quay construction because of the restriction of the wall height.The large-scale deep water berths will be realized due to that covered sheet pile greatly strengthens the force of the front wall.As a new structure,there is no mature theory and method of covered sheet-pile quay,and the seismic characteristics and mechanism is unclear.The seismic residual deformation and seismic mechanism of sheet pile quay are complex problems in the seismic safe design of sheet pile quays.Based on the nonlinear finite element method,a series of seismic design parameters were considered such as spacing between the covered pile and the wall,seismic acceleration amplitude,the length,thickness,intension of the covered pile.The seismic residual deformation and stress characteristics of covered sheet-pile walls and mechanical characteristics of rods are analyzed,seismic mechanisms and deformation characteristics of covered sheet-pile quay are studied in detail and the seismic effect is confirmed under different parameters.Finally,the reasonable seismic design values of design parameters are presented.The achieved results may serve as reference for the seismic safe design of covered sheet-pile quays.

Abstract:Based on the three-dimensional ocean numerical model (FVCOM) in the theory of finite volume method,we establish the three-dimensional tidal model and convection-diffusion model in shallow waters of Lianyungang.With the advection-diffusion model,we calculate the concentration of the conservative in the main port of Lianyungang port and analyze the three-dimensional water exchange characteristics in the main port.The results show that the water exchange capacity of the entrance is the best and the water exchange capacity decreases from the entrance to the bottom in the main port.Also,the difference of water exchange capacity between the surface and the bottom is very small.The average residence time,semi-exchange time and flushing time of the main port are 13 d,5 d and 84 d respectively.

Abstract:Some deficiencies of partial provisions are discovered by the application practice.This paper probes into problems of the Code for Master Design of River Port Engineering concerning water supply and sewerage from the water consumption in fire fighting,distance of water supply hydrant,design rainfall recurrence interval,as well as the container wash water consumption,and puts forward suggestions on the modification of the code.

Abstract:Since the 175 m test-operation of the Three Gorges Resevoir (TGR),the typical reach in the fluctuating backwater area has suffered navigation problems because of the pebble movements,among which the Sanjiaoqi reach is particularly serious.Located on the Jiulongpo harbor,Sanjiaoqi reach is a typical gully and branching reach,and the main channel is bend,narrow,shallow and dangerous.As a result of the change of the sediment movement law due to the impoundment of the TGR,new characteristics appear.The amount of sediment deposition is small,while the influence on the channel conditions is relatively large,and a lot of ships are stranded during the sluicing period.To improve the channel conditions,maintenance and dredging are extremely necessary.Based on the field measured data,we study the characteristics of sediment movements and discuss the dredging plan and effect.

Abstract:Relying on the first-stage project of Funing port in Yunnan province,we establish a three-dimensional finite element model of the overhead sloping wharf.Based on the water-rock interaction,considering the degradation damage of bank slope’s rock and soil mass under water level cycles circulation in the mountainous rivers,we obtain the bending moment,the shear and axial force of the pile and track beam qualitatively.The result can be a basis for further studying the whole performance and mechanical degradation characteristics of the overhead sloping wharf.It can also provide recommendations for monitoring and protection practical engineering after operation of the terminal at the reservoir area.

Abstract:In order to improve the service level of port authority and reduce the operational cost at the same time,we probe into the yard cranes scheduling problem in multiple blocks in a fixed period under mixed storage mode.Considering YCs resource sharing among the blocks and the workload balance of YCs and their relationship with the internal and external trucks,we propose a non-liner mathematical model of yard cranes joint scheduling in mixed storage yard for the objective of minimizing the total cost of yard cranes’ moving,turning cost and the waiting cost of the trucks involved.A two-part chromosome representation is presented based on the handling sequence and workload of YCs,then an IGA with the embedding of the available space split strategy and chromosome correction technology is proposed to solve the problem.The results from the empirical analysis seem quite well,which proves the feasibility and validity of the model and IGA.

Abstract:Combining with concrete engineering cases,we analyze the common schemes for the reinforcement and reconstruction of high-piled wharf adopted in China and summarize the adaptable condition and advantages & disadvantages of each scheme,to serve as reference for the wharf reinforcement and reconstruction.

Abstract:This paper expounds the design schemes for the nuclear plants’ heavy cargo wharves built and being under implementation in China from the aspects of general layout,unloading process and structure types,and summarizes the train of thought and key points of overall design of the heavy cargo wharf,to serve as reference for the design of the nuclear plants’ heavy cargo wharves.

Abstract:Fujiangsha reach is the only river section in the lower reaches of the Yangtze River where the river branches twice and hence has three navigable branches.For the time being,the right branch,i.e.the Funan passage is the main channel of the river.Moreover,on the right bank of Funan passage there lies the main stevedoring area of Zhangjiagang port district of Suzhou port,the largest inland port in China.Considering the construction proposal for the 12.5 m deepwater channel in the lower reaches of the Yangtze River downstream of Nanjing，and the deficiency in water depth at the upper mouth and the deficiency in channel width at the curved section of Funan passage,this paper demonstrates the waterway classification and waterway dimensions of the Funan passage which will be a dedicated approach channel to Zhangjiagang port district,and the layout of the operational water area of the inner port,in combination with the current status and planning of shoreline use and berth distribution of the port in Funan passage.Furthermore,the mathematical model was applied to research the back silting of modified layout and preliminary proposals on silt reduction were proposed.

Abstract:Based on the past,current situation and development achievements of the Beijing-Hangzhou Canal,considering that water in the Yangtze River has crossed the Yellow River after implementation of the south-to-north water diversion project east line phase I project,referring to the advanced experience on the river-crossing engineering over the world,and according to the hydrological,topographical and geologic conditions of the Yellow River,the author puts forward several proposals on the interchanging schemes including level crossing and overhead crossing as using tunnel,canal bridge,wide track plus ship chamber and corresponding analyzing comments.The presentation and implementation of the Yellow River-crossing engineering scheme for Beijing-Hangzhou Canal not only declares the construction level of water transport engineering in China to the world,but also makes contribution to the integrative development of Beijing,Tianjin and Hebei province in the process of realizing the whole-line opening to navigation in Beijing-Hangzhou Canal.

Abstract:Taking the Damazhou waterway as the prototype,we introduce the grass grid as a new guardian structure into the beach protection engineering.According to the characteristics flow and silt motion of Bingyin delta beach，we set up the generalized flume model to study the grass grid’s the influence on the flow structure and beach face scour prevention effect.After laying grass,the flow velocity of the beach face near bottom is decreased obviously and thus has an obvious effect of stabilizing the backfill sand and provides favorable conditions for the growth of grass vegetation.In the upstream segment of Bingyin delta beach where the face velocity is larger,it is feasible to take grass grid guard measures.

Abstract:The Nianpanshan-Chenjiaji reach of Hanjiang river is characterized by fine sand,small of riffle-pool difference,and frequent variation of navigation channel,and navigation-obstruction exists in both dry and flood seasons.Based on the research,we adhere to the regulation principle of integral consideration,making the best use of situation,flats stabilization & bank protection,and middle-water & low-water combined regulation.According to the variation characteristics of the river bed,we chose several engineering schemes,by which the navigation channel kept stable and the navigation condition was improved greatly.The experimental research achieved the perspective effect.

Abstract:Considering the limiting conditions of river crossing buildings clearance based on the analysis of waterway conditions,we point out that Taipingzhou shortcut waterway can only be opened up to waterway of 3 000 DWT or below.After checking the waterway capacity of Taipingzhou shortcut waterway and analyzing comprehensively the change of navigation ship dimensions and amounts due to the development of both sides shoreline and diverted ships from the main channel after the channel dimensions are increased,we determine the designed typical ship type.According to the channel dimensions needed for the designed typical ships,we recommend the designed channel scale for Taipingzhou waterway is 5.0 m×200 m×450 m（water depth×navigation wide×bending radius）,which may serve as reference for the development and utilization of Taipingzhou shortcut waterway.

Abstract:There’re two bars outside the entrance of Minjiang river 0.2 million DWT entrance channel,i.e.the inner bar and the outer bar.It is a representative river estuary at which sand mainly comes from the land.This paper probes into two issues:1) To carry out an analysis on the formation causes of the outer bar according to the topography,flow & river type and based on the real-measured data concerning hydrology and sediment,and get the conclusion that the circulating current in the river bend is the main formation cause of the outer bar.2) Based on the analysis of the real-measured topographic map of the river estuary from 1886 to 1986,and considering the siltation process at the outer bar area,to propose the concept of “current having the characteristics of automatic transmission of resistance”,and explain theoretically the mechanism of diversion and bifurcation of the main current and put forward the condition of diverting.

Abstract:Water-filling is non-uniform by long culvert with branch orifices of shiplock,which impacts the mooring conditions of the lock chamber.Hydraulic characteristics of the process of water-filling by long culvert with side branch orifices and its influence on the free-surface movement of lock chamber are studied based on the CFD model and verified by the physical model.The results show that the law of flow distribution among orifices at thebeginning is opposite to which in the later period,and the non-uniform water-filling causes long wave on the free surface of lock chamber.

Abstract:At present,academic circles do not have a unified understanding of vacuum negative pressure transfer law above and below the underground water level,and of mechanism of effective stress increase above and below the underground water level in the process of vacuum preloading.This paper analyzes the changing of effective stress caused by the total pore water-head change in the whole press of vacuum preloading,and discusses the transfer law of vacuum negative pressure in soft soil from another angle.The research results show that the vacuum pressure can be transferred not only above the underground water level,but also below it.It will decrease with the penetration resistance;both the vacuum pressure and the lowering of groundwater level will cause the increase of soft soil effective stress at any point,and the increasing effective stress expression is uniform for any point both above the underground water level and below it;the degree of vacuum preloading reinforcement is associated with the depth of the underground water level,and the deeper,the worse the reinforcement effect;in the process of reinforcement,the groundwater level will decline,but do not drop.

Abstract:Based on the application of the sand pile combined with plastic drainage plate in foundation treatment of bulk cargo yard,this paper analyzes the applicable conditions and advantages of the new foundation treatment method.Combining with engineering examples,this paper summarizes the design and calculation of the ground treatment method and construction key points,which may serve as reference for the design and research of ground treatment of deep soft soil foundation for the bulk cargo yard.

Abstract:The sheet-pile structure is used in a Shanghai ship lock.In order to choose appropriate solutions,we put forward the anchor sheet-pile by anchorage wall,anchor sheet-pile by inclined pile,inclined pile structure of elevated pile cap,and straight pile structure of elevated pile cap,and analyze the structures based on Plaxis finite element program.Through calculation,we get the structure’s displacement and internal force and the distribution of earth pressure.The calculation results show that the horizontal displacement of the anchor sheet-pile by anchorage wall and straight pile structure of elevated pile cap structure reach 60～70 mm;the horizontal displacement of inclined pile structure of elevated pile cap and anchor sheet-pile by inclined pile structure are only about 20 mm;the inclined pile structure of elevated pile cap can also reduce the effect of earth pressure,the earth pressure on the sheet-pile is smaller,and the bending moment value of the sheet-pile is the minimum.Inclined pile-elevated pile cap is more suitable for this project.

Abstract:In view of the sharp fluctuation in efficiency and economy of slurry transportation by pipeline,we analyze the ranges of particle size,transportation distance,pipe diameter,delivery concentration and the restriction of critical velocity and net positive suction head (NPSH),study the change laws of efficiency and economy of slurry transportation system caused by the change of transportation concentration,and propose the optimal construction method under specific working condition.

Abstract:As a key part in dock engineering，the cut-off wall is the foundation to make sure that dock can be operated safely against water.The choice of the kind of cut-off wall impacts tremendously the dock quality and project cost.Normal cut-off walls have certain flaws such as high price of the steel sheet pile,many leaks of high-pressure jet grouting pile,etc.So,it is imperative to research and apply new-type curtain walls.This paper describes the first application and construction effect of SMW method cut-off wall used in dock wall and foundation pit of dock head,which may serve as reference for similar engineering.

Abstract:Taking the breast wall construction of Wenling fishing ports as example，this paper expounds the structural design,mobile system design,assemble and operation of integral mobile steel formworks adopted in high crest wall construction and simple calculation of template,and design calculation of the steel structure truss system.