Abstract:Drift distance of riprap is a problem encountered frequently in works of river channel regulation,river regulation,bank protection,submerged dike construction and pier scour protection.Relying on 12.5 m deepwater channel phase Ⅱ project of Kou’an straight reach along the Yangtze River downstream Nanjing，a series of experiments have been conducted to investigate the effect of water depth,flow velocity,throwing height,rock mass and irregularly shaped foundation of rock on drift distance of riprap.Furthermore,a formula for calculating throwing distance of riprap is given based on hydraulic equilibrium equations which describes riprap movement by considering the vertical distribution of flow velocity.The coefficients in the calculating formula are obtained by curve fitting using the data from experiments.Reasonable agreement of calculated results with model experiment and field observation results verified the reliability of the model.

Abstract:In view of the complex operation environment and big ship traffic density of the second phase of Nanjing 12.5 meters’deepwater channel project,we design the navigation and production safety information platform.[JP3]Based on the web service system of B/S mode,we realize all inspection records of navigation and production safety,safety emergency support,navigation environment monitoring,video surveillance,etc.utilizing the function component structure to design system and taking advantages of the massive data organization and management technology,and can update all kinds of information in a timely manner.The system has achieved the expected effect in the practical application.

Abstract:This paper introduces the types and main functions of geosynthetics,summarizes the progress of research on the application of geosynthetics,the field of scour prevention,ecological bank protection and breakwater construction,expounds the research achievement and engineering practice of the bottom soft mattress,active hook structure,ecological banks,and sand bags,etc.,and points out the direction of research on the application and development of geosynthetics in the port and waterway engineering.

Abstract:The maximum wave height is significantly important for the prevention of coastal and marine disaster as well as for the calculation of design wave.The maximum wave height formula based on the Rayleigh distribution can not reflect the influence caused by spectral width.Thus,the theoretical value of maximum wave height obtained by that formula is higher than the real value in practice.Through analyzing the 10-years’measured data of Norwegian Sea,we find that Hmax/Hs decreases gradually with the increase of spectral width.A maximum wave height formula with spectral width as an influence factor is deduced,which is easily to use and has good practicality.

Abstract:The variation features of the shape factor of probability distribution of single wave overtopping volume on vertical wall is investigated in detail by carrying physical model test.In the test the wave pattern ranged from completely nonbreaking to fully breaking ,meanwhile two slope ratios at wall toe,three wave steepnesses and three relative freeboard heights are included.The result shows that wave steepness has no clear effect on the shape factor.Increment of relative freeboard height causes decrement of the shape factor in different level depending on the relative depth and slope ratio.With relative depth increasing the variation of the shape factor changes with slope ratio from increment to decrement gradually.In the variation process of relative depth from deep to shallow the shape factor firstly increases successively,then reaches its peak and begins to decrease at last.The global mean of the shape factor both in nonbreaking and breaking condition region in the test agree to that of the existing studies.

Abstract:On the basis of the dredging process of coral reef fragments of the solid-liquid two-phase flow movement in the horizontal pipe,a numerical analysis model of fluid solid coupling about coral reef pipeline transportation is established.The dynamic characteristics of coral reef solid fragments on the horizontal pipeline are analyzed in detail including the coral reef density,particle size and slurry concentration.The results show that the smaller density of coral reef,the smaller particle size and the bigger slurry concentration can cause a smaller particles critical velocity；on the contrary,the bigger coral fragments density,larger particle size and the smaller slurry concentration can lead to a bigger critical velocity of coral reef fragments in the horizontal pipeline.Based on the numerical results,a new formula about the critical velocity of coral reef is proposed,which is verified with the numerical results.It is found that the formula proposed can be used to predict the critical velocity of coral reef in horizontal pipeline with an average error less than 15%.

Abstract:Waves caused by hurricanes are important to safety of ship navigation,marine and coastal structures.Hurricane waves should be considered in design wave parameters calculation.The paper uses Young & Sobey cyclone model to set up hurricane wind field,and uses the third wave model-MIKE 21 SW to simulate wave caused by hurricane,and compares the simulated results with buoy data.According to the comparison result,extreme wave parameters can be simulated well by MIKE 21 SW.

Abstract:A FE analysis model was made to simulate the whole process of cracking in RC beam due to the expansion of corroded reinforcement.The initiation and development process of cracking due to even and uneven expansion of corroded reinforcement were obtained,and the factors affecting the expansion rate at the time of cracking in the concrete cover were analyzed,including the thickness of concrete cover,rebar diameter and the concrete strength grade.The comparison of the experimental data with the previous research results indicated the same laws of corroded expansion.On this basis,the factors of structure durability and guided the design of structural durability were proposed.

Abstract:Based on the design data and construction experience of CSSC Changxing shipbuilding base,we establish a 3D finite element model to analyze space-time effect and deformation characteristics of large paratactic dock.We propose reserving partial soil mass before building ground floor and excavating the reserved parts after dock wall steel sheet pile,which can control deformation of dock chamber foundation excavation.

Abstract:Based on the FVCOM(Finite-Volume Coastal Ocean Model)model,a detailed 3D tidal current numerical model of Minjiang Estuary area is established.The selection of subsea drag coefficient is discussed,and the conclusion of Koutitas formula is more reasonable.The tidal and tidal current characteristics of Minjiang Estuary are analyzed by using this model.It is concluded that:Minjiang tidal wave spreads from the southeast to the northwest to the estuary area,and the flow within the channel has obvious reciprocating flow characteristics.Tidal current mostly tend to rotating flow-based in north and east of the Yundou island.The north branch of the Minjiang river is dominated by falling tide,and the 3D flow field in estuary area is not obvious in the influence area of lateral tributaries.

Abstract:In view of the shortage of gravity caisson,a spatial frame composite pipe pile structure has been designed and studied.Through theoretical analysis,numerical calculation,conceptual design of engineering case,the advantages of the new structure are described.The wave force at extreme state is only 13.5% that of the traditional cylindrical caisson.The maximum reaction stress does not exceed 300 kPa.The structural lifting tonnage can be controlled at 1000 tons.Material weight is 10% to 25% that of the traditional caisson.The key members of the structure are prefabricated in the factory.

Abstract:The calculation of sheet pile wharf is mainly based on the current code for design of sheet pile wharf.In order to improve the calculation accuracy,this paper takes a practical project as an example and uses the other two improved calculation methods to calculate the structure of the sheet pile wharf.The similarities and differences of the calculation methods are compared,and the results of each method are analyzed.The most important parameter of the elastic foundation beam method is the proportion coefficient m of the horizontal ground reaction coefficient which increases with the depth.It is suggested to determine the m value according to the cohesion c and the internal friction angle φ.

Abstract:In view of the problem that sloping wharf cannot meet the troops global mobile because of poor universality,based on the loading and unloading mode of ro-ro ship with stern straight type springboard T-type berthing at vertical lifting wharf,the water level and time calculation models are established.Based on the two limiting position of stern springboard overlap jointed with the wharf,the water level model deduced out the data range of operation water level.In the time model,tidal fluctuation regularity is regarded as simple harmonic motion.The amendment number of tide height,phase angle,and time interval of tide level and low or high water marks are get in succession,consequently the time table of corresponding tide is get.The correctness of the two models is verified and the data range of water level and time for loading and unloading are get by an example

Abstract:The old port of Dalian Port has been built over a century ago.The basin entrance,harbor basin and other part facilities have been formed for a long time.To adapt to the increasingly large international cruise berthing needs,the domestic and international norms are in-depth analyzed.Combined with the research results of ship navigation simulation test,the plane dimension are optimized.As a result,the best use of the existing port facilities is made,the needs of the tonnage of the largest international cruise ship berthing are met.

Abstract:The basic principle of quantitative area risk assessment method is introduced and applied in the safety assessment of a dangerous goods container storage yard.The major hazard level of dangerous goods container storage yard is determined.CASST-QRA software is used to simulate the accident consequence of dangerous goods container storage yard.The individual and social risk map of the storage yard is drawn.According to the judgment standard,the risk of container storage yard is acceptable.The results show that quantitative area risk assessment method can provide the basis for safety assessment of dangerous goods container storage yard,and can provide a theoretical basis for comprehensively understanding the risk of port area and the scientific planning of port area.

Abstract:In view of the contradiction among the technology requirements,environmental protection,buildings’fire protection and structure scheme in the process of the project implementation of large-span dry-coal shed in port,we carry out the optimization design and research on it. Comparing the technology,building and structure scheme,we draw the conclusion as follows:the project investment cost of semi-closed dry-coal shed with lower column is the minimum；the totally-enclosed dry-coal shed with 4 m-high column has the maximum coal storage,better usability,high degree of automation and better effect of environmental protection.

Abstract:Considering Colombo Port City project the actual situation,such as huge construction quantity,more construction process,tight construction period,this paper applies the method of numerical simulation and physical model,the related engineering case support to carry out optimization layout and structure,which is under the premise of meeting the functional requirements.The risk and measures of optimization are analyzed,and the optimization scheme can save the construction period and cost from the source.Optimization results have been approved,and it is applied to the engineering,which provides technical support for Port City project implementation.

Abstract:The mathematical model of the Hengsha port area in at Yangtze Estuary is built based on the CJK3D-WEM model to study the changes of hydrodynamic force in water around the port after construction of Hengsha port.The result shows that after the implementation of port Hengsha scheme,the diversion ratio of each section has small changes.In the south channel,the fluctuating velocity in upper north channel increases to some extent,and that in the downstream north channel decreases slightly.The ebb current in the South-North Channel changes slightly and still shows obvious ebb along the north.The ebb velocity change is small,the maximum flood increases in north port estuary,and the remaining section decreases.The implementation of the project has a small influence on the river regime of the Yangtze Estuary sandbar area.

Abstract:Net hydrodynamic uplifting force of reversed tainter value in flat-bottom galleries of high-head lock is studied through unsteady flow tests,main result as follows:1)The net hydrodynamic uplifting force of reversed tainter value is composed of two parts,a part is produced of the corridor current,the other part is produced of the valve shaft current. 2)The net hydrodynamic uplifting force of reversed tainter value resulted from the corridor current has liner relation with square of Froude number of orifice current in every opening. 3)The net hydrodynamic uplifting force of reversed tainter value resulted from the valve shaft current has liner relation with Froude number of valve shaft current in every opening. 4)The formula of net hydrodynamic uplifting force of reversed tainter value in flat-bottom galleries of high-head lock is proposed for the first time,the results calculated is in good agreement with the prototype observation,the proposed formula has a high accuracy.

Abstract:According to the shipping and freight volume forecast of the Yangtze Estuary,in order to meet the national development strategy of Yangtze River Economic Zone,navigational channel regulation in the south passage should be implemented as soon as possible.The recent river regime variations,morphology evolution trends and navigation-obstructing properties of the south passage and adjacent waters are analyzed. Regulation principles are proposed that channel regulation,river regulation and environment protection should be associated,cooperated and developed mutually in the region.At the same time,the regulation approaches such as“current limitation,shoal protection,channel stabilization”and“water diversion,depth increase,siltation reduction”are proposed.Finally,the general schemes of the south passage navigational channel project are proposed based on the preliminary study.

Abstract:Based on Binzhou Port field observation data such as water depth,sediment,the dynamic changes and seabed erosion and siltation in Binzhou Harbor are analyzed,and sudden siltation in outer channel and feasibility of channel are discussed.The result shows that siltation in windy days will be the focus and difficulty in Binzhou Harbor.Though in the case of channel dimension and direction with Huanghua port are basically the same,the siltation of Binzhou Harbor will be worse than in Huanghua port.Binzhou Harbor waterway dredging has certain difficulties,and it is really possible to appear “the iron sand” in a certain range outside -6 m isobaths in bad weather conditions.Based on anticipation,particle size is coarser in Binzhou Harbor than in Huanghua port,and clay content is less than the Huanghua port.It is predicted that outer channel excavation(or clearing)is more difficult.

Abstract:With the upgrading of the Yangtze River waterway,ships sailing often are threatened because of insufficient horizontal width in the navigation-obstructing river with the protruding point or large reef,so,we carry out a research on the generalized rock oblique flow structure and ship’s stress characteristics.Simulating the rock channel by software CFD combined with the 3D numerical simulation of the current,we know that the higher the current speed and the more the rock occupies,the longer influential distance on the flow structure of distance,and esp. the influential distance of the lateral velocity is more obvious； velocity is proportional to the lateral force of ship；the length-way influential distance from the generalized rocks on the ship is generally within 1 time the length of the ship both upstream and downstream,and the maximum value is at the 0.5 time ship length upstream.

Abstract:It is necessary to study the navigable condition and navigational clearance dimension of the bridge,because the piers may have a great impact on the navigation safety.At present,the research on the navigable demonstration of the bridge mainly includes the water flow velocity,flow direction,navigational clearance height and width,while little research has been done on the ship motion state which representative ship through the navigable hole.Based on the 2D flow mathematical model,this paper establishes the mathematical model of ship maneuvering motion,and simulates and calculates the ship attitude and navigation parameters,including heading angle,rudder angle,drift angle and speed.The results show that it can better simulate the control and navigation conditions of the ship under different hydrographic conditions and different navigational holes.

Abstract:Water level characteristics change has greatly in the intersection of the Yangtze River and Jialing River before and after the Three Gorges Reservoir.Under the dual influence of inflow and reservoir backwater,this paper uses statistical analysis to study the characteristics of water level before and after the formation of the river.The study shows that the confluence between Jialing River and the Yangtze River is affected by the tributary of the Three Gorges Reservoir,which is estuary characteristics before.The channel segment is affected by the backwater of the Three Gorges Reservoir area to appear reservoir characteristics in the falling and the storage period,but it is estuary characteristics in the flood season.

Abstract:Adopting model test research method,we observe the damage process of the spur dike’s root under different flow,different water depth and different length of the spur dike,analyze comparatively the damage degree of the dike root in different working conditions,and find out the damage causes of the spur dike’s root in the Upper Yangtze River.The experimental result shows that the flow is the direct factor for the washout,the length of spur dike affects the flow around the dam indirectly through affecting the flow structure surrounding the dam,and the water depth influences the root damage only when it is just submerged.When the water depth is 3 cm above the dam,the washout phenomenon is not obvious

Abstract:The upper Chuanjiang River Channel has always been in a slow development state in recent years,and is in the asymmetric position compared with other modes of transportation.With the continued macroeconomic growth,the Yangtze River economic belt development turns to be the national key strategy,and the Yangtze River shipping will also enter a new stage.In view of the existing problems in the development of the Chuanjiang waterway,this paper puts forward suggestions and ideas on the development of the upper Chuanjiang channel.

Abstract:According to the characteristics of low speed and large cyclotron motion for ship’s berthing and unberthing in mountainous rivers wharf,we adopt the scale effect correction method to calibrate the manoeuvre similarity of small-scale ship model,and conduct the simulation experiment on the hydraulic model of Jinshajiang River middle mouth pier.Test results show that it is practical and effective to use the small-scale ship model technology for the simulation of ship’s berthing and unberthing in mountainous rivers wharf,and may provide valuable basis for the related engineering design.

Abstract:Controlled waterways are special areas in the upper Yangtze River with narrow channels and sharp corners.Ships need to be sequenced and scheduled by the intelligent traffic signaling system to pass through the controlled waterways and are allowed to pass in one direction at a time for the safety reason.If the ships do not obey traffic command signal during the voyage ,the disastrous nautical accidents such as collision,stranding of the ships will be more likely to occur.This paper proposes a new approach to detect illegal navigation based on AIS,the video detection system and the traffic regulations.Firstly,the ships are identified by eliminating the background noises.After that,several cameras are used to track the ships trajectories in different scenarios.Finally,the illegal ships are estimated according to the traffic regulations of the ships on the Yangtze River.The experiment result confirms the effectiveness and efficiency of the proposed method.

Abstract:The vibro-replacement stone columns are mainly used to treat the shallow-layer soil and generate one kind of composite foundation in order to reinforce the bearing capacity of the foundation,decrease the settlement and eliminate the sand liquefaction.The CFG pile is settled at the centroid of four gravel columns and the tip of the CFG pile is deep in the hard layer,which plays an important role in controlling the bearing capacity and the displacement of the composite foundation.This paper researches the composite foundation consisting of the vibro-replacement stone columns and the CFG piles before and after the treatment by the static sounding test,the dynamic sounding test and the static load test.The results indicate that the vibro-replacement stone column in the combined-pile composite foundation largely increases the bearing capacity of the single CFG pile and the soil layer,and the smaller the distance between piles,the greater the strengthening effects will be.

Abstract:The residual excess pore pressure ratio is used as the basic parameter for the evaluation of liquefaction potential and seismic design of hydraulic structures.For the purpose of clarifying the approach of calculation of residual excess pore pressure in United States code,the cyclic stress ratio causing liquefaction,the equivalent cyclic stress ratio and the factor of safety against liquefaction are discussed.An example of gravity quay is provided to illustrate the calculation of dynamic earth pressure including residual excess pore pressure.The results show that this method can solve the estimation problem of soil excess pore water pressure ratio.

Abstract:TSC pipe pile bending capacity is an important index of the pile foundation design.Current JG/T 272—2010 in bending strength calculation is on the basis of DL/T 5030—1996 standard,and the wall thickness of concrete according to DL/T 5030—1996 has strict rules whose application in the TSC pipe pile is up for debate.This paper has carried on the theoretical derivation of TSC bearing capacity.Bending strength calculation method of pipe pile is established.At the same time comparison and analysis is made with the current standard values.The calculation results show that the theoretical formula of bending strength which built in this paper matches well with the standard values,and it can be used in the TSC pipe pile flexural strength calculation.

Abstract:In the dredging construction area with a lot of stones,blocking drag head and mud pump happen frequently for the trailing suction hopper dredger.So,we carry out an experimental research on various kinds of stone-defending grilles.The result shows that the wire rope grille is most suitable for the stony area,because it can reduce greatly the risk of blocking drag head and improve the production efficiency and shorten the construction period.

Abstract:Based on the field experiment,we use the rich silt resource in the Huanghe River Delta to build an embankment.Adopting the slope dike structured bagged silt prism plus filled silt dike core,we build a 3 km long grade I harbor road and achieve satisfactory economic and social benefit.The new dike-building technology,which upgrades the conventional bagged sand to the bagged silt by adopting directly the silt to fill the geotextile bags,shows a good application prospect in the silt area.

Abstract:Embankment remedy is researched to solve the problem of no blast through sand layer in thick silt foundation happened in Da-xiao-yushan south embankment project.According to construction technology,the reasons for no blast through the sand layer are simply analyzed.Then simple Bishop method is used to check stability of the problem embankment.Remedy is proposed to comparatively analyze stability of the bad blasting compaction and the ideal blasting compaction.Results show that the stability of embankment can be improved if increasing landside blast,and at the same time thickening and widening anti-slide loading berm.It provides an important reference for foundation treatment design and construction in such complex silt foundation with sand layer.

Abstract:GNSS PPK(post processing kinematic)is a dynamic post-processing technology which is free from the restrictions of radio transmission distance,and the distance can reach 80 km.In order to solve the problem of the bathymetric survey in the coast long channel,we propose the method of GNSS PPK 3D bathymetric survey,which improves the accuracy of the bathymetric survey without tide extraction and tide fitting,and avoids the cumbersome secondary development using the existing commercial software TBC and Hypack.The principle of the GNSS PPK positioning and GNSS PPK 3D bathymetric survey is introduced,and the implementation method of GNSS PPK 3D bathymetric survey based on Hypack 2014 is expounded.It is valuable in the bathymetric survey of the coast long channel.

Abstract:Aiming at problems of temporary cofferdam project of a coastal dock in Beibu Gulf，such as the western deep water(4.0～7.6 m)，close to the edge of the fishermen habitual channel,this paper recommends the dike core structure through the comparison of multiple schemes,which is made with ductile soil pipe and large woven bag sand.The practical problems of project are solved successfully by the scheme.