Abstract:During a tidal cycle,the back-siltation is changing with the tidal power.So it is necessary to study the distribution of back-siltation in the deep channel.The result is helpful for the arrangement of channel maintenance to reduce unnecessary dredging.Based on the hydrological data observed near the bottom of the deep water channel,a model is used in this paper and the distribution characteristics and mechanism of back-siltation is obtained.Although the sediment concentration near the bottom is high and the bed is eroded by the strong power during the spring tides obviously,the formation of back-siltation is smaller.And the back-siltation mainly occurs during neap tides.This conclusion has been verified by the data observed during the dry season.

Abstract:For the soft mattress laying in Hechangzhou Section of 12.5 m deepwater channel regulation project of the Yangtze River below Nanjing,the deepest mud surface elevation is -42.9 m,the actual measure flow velocity is 2.1 ms,and the longest completed length is over 640 m.In order to solve the problem of laying and controlling of long soft platoon in deep water and large flow rate condition,we use the whole process quality control technology to control the whole process before and after laying.The width of the lap and the overall quality meet the design requirements.

Abstract:This paper discusses the differences of running speed characteristics between hydro-floating ship lift (HFSL) and traditional electrically actuated ship lift,and summarizes the non-uniform operating speed feature of HFSL.Based on prototype observation tests of Jinghong HFSL project,the running characteristics under condition of various running speed are systematically introduced.The impact of indexes including water surface fluctuation in ship chamber,tilt amount of ship chamber,torqueon synchronizing shafts are analyzed.

Abstract:In the process of downstream docking,ships in and out of the ship chamber caused by the surface fluctuation,water level difference docking influences the safe operation of the ship lift and ship berthing condition.To study the influence of the factors on the ship lift,we carry out the real ship test for overloading and no-load ships in different speeds in and out of the ship chamber and water level difference in and out ship chamber door opening and closing and obtain the variation characteristics of boat load undulation,synchronous shaft torque,as well as ship’s mooring force under corresponding working conditions,establish the interaction relation between the synchronous shaft torque and influential factors,and put forward safety control indices of the ship speed in and out of the chamber and the ship lift docking waterhead which satisfies the safe operation of Jinghong hydraulic ship lift

Abstract:This paper builds a physical generalized model of submerge ship chamber ship lift with scale of 1:20 to study the impact of chamber tank area and ship chamber’s velocity to hydrodynamic characteristics of the submerge ship chamber ship lift.The results show that the increase of β (ratio of the difference between the area of chamber and chamber tank to the area of chamber)can lower the water surface fluctuation in chamber tank ,the maximum gradient of water surface in approach channel and chamber tank,make mooring conditions of ship chamber better.Considering the project cost increases with β,the recommended β is 1.24.

Abstract:The force state of balance weight is directly changed when the water flow is unstable,which is affecting the stability of the ship’s operation.Therefore,it is an effective way to improve the quality of ship lift operation by choosing a reasonable balance weight’s body form at the bottom.In this paper,the 3D coupling fluid-structure-coupled mathematical model of the different balance weight’s body form at the bottom is designed and built,which can dynamically simulate the hydrodynamic response when balance weight is lifted up and down under the action of unsteady flow.The results show that the effect of the flow on the bottom of the balance weight is improved,the horizontal force is almost disappeared,the flow velocity between the gaps is evenly distributed ,and the balance weight wave problem is resolved.

Abstract:The hydraulic floating ship lift adopted in Jinghong Hydropower Station has completely independent intellectual property in China.As a significant part of the water conveyance system of hydraulic floating ship lift,the profiled sudden enlargement steel structure is used to improve the flow state of the internal water channel to improve the conveyance efficiency.The profiled sudden enlargement steel structure is a large-volume profiled cavity with complicated working conditions,so beams are decorated both in and out of it to bear the water pressure.The mechanic analysis of working state and hydrostatic test status of the profiled sudden enlargement steel structure is conducted by the finite element analysis,results of which show that the structure strength meet the requirements.

Abstract:Now,hydro-floating ship Lift has not run at practice in China and abroad,even we have no experiences to design,install and operate.In this paper,the fluid-structure-coupled mathematical model of different clearance ratio between the silo current and the balance weight is designed and built,which can dynamically simulates the hydrodynamic response when balance weight is lifted up and down under the action of unsteady flow.And then,the optimal clearance ratio is obtained for the stable operation of the ship lift

Abstract:To counter the problem of the tilting of the ship carrying chamber during operation of the large ship lift，on the basis of structural analysis of the synchronous axis system,we get to know the factors affecting the tilting of the ship’s cabin,and put forward suggestions on the design of synchronous shaft system of ship lift.

Abstract:In view of problems about chamber’s incline and excess synchronous system torque during water debugging,we analyze and determine the boundary parameters of the guidance system and carry out the structure design of it.Conducting the finite element analysis for the guidance system and studying the structure strength of the chamber within the installation area of the guidance system，we also discuss the problems and solutions during installation of the guidance system.Suggestions about operation and maintenance of the guidance system are provided.

Abstract:Because of the characteristics of the periodic oscillatory motion of the water particles under wave action,the direct observation is difficult.However,the direct observation of the moving water particles under wave action is helpful not only to the further development of the wave theory,but also helps to understand the characteristics of the wave motion.So a new water particles tracing apparatus with a very low cost is presented.This environmentally-friendly and safe apparatus can be applied in observing the orbits of water particles directly,which is simple in structure and easy in operation,and without disrupting other flume experiments.Combined with a series of flume experiments,the working principle and operation method of the apparatus are discussed in detail.The experimental results also show that the apparatus and method are applicable in tracing any water particle in the flume under different wave elements,and the experimental data are in accordance with the wave theory,which proves the practicability and reliability of the apparatus.

Abstract:In view of natural sand becoming scarce and the high stone powder content in manufactured sand resulting problems like poor workability and pumpability of concrete prepared,influence of silica fume on workability,mechanical and volume stability of manufactured sand concrete is studied,and the mechanism of the silica fume is analyzed.The results show that suitable amount of silica fume can improve the workability and stability of concrete,solve the high viscosity and bleeding of concrete caused by high stone powder content in manufactured sand,improve the slurry microstructure,and enhance the mechanical and durability performance of concrete,and its 28d dry shrinkage rate is below 400×10-6.When stone powder content in manufactured sand is around 10% and silica fume content is from 6% to 9%,the prepared C50 manufactured sand concrete has good uniformity,and the slurry viscosity value is around 2.5 Pa?s,and bleeding rate is almost zero.Its practical application is satisfactory.

Abstract:This paper presents a 2D tidal current and suspended sediment model which takes the Yongjiang River and the out sea area as the key research area.The model is adopted to carry out numerical simulation of tidal current and suspended sediment movement of half a month in the concerned area in June 2015.A good agreement is found between the observation data and computed results.Analysis on the computed residual current and sediment transport pattern in the flood season shows that the residual current generally causes transport from northwest to southeast in the out sea area,and seaward transport in the river.The sediment transport pattern is almost in accordance with the residual current pattern except local regions at the estuary.The sediment is transported into the Yongjiang River by the flood current and the net sediment transport direction near the estuary is towards the upstream.The local difference between the residual current and sediment transport patterns at the Yongjiang Estuary is because of the time lag between the tidal current and suspended sediment movement.

Abstract:This paper analyzes the cutter cutting soil process based on the finite element method(FEM).Cutter parameterized model is set up,and modal analysis is carried on.The amplitude is obtained under different order natural frequency,which provides the reference for cutter manufacturing.LS-DYNA is used to simulate the process of the cutter cutting soil,and MAT147 model is selected for soil materials.Different time cutting form of the soil is researched,and the simulated cutting resistance is compared with theoretical results,which verifies the reliability of numerical simulation.

Abstract:The coastal long-distance tide level in dredging projects can not be controlled in real time,which limits precision of dredging depth.To resolve this difficult problem,by analyzing such key parameters as the datum transfer,tidal harmonic constants,the number of residual water level selection and correlation,with the dredging project of Dafeng port channel in Yancheng this paper puts forward a method of calculating coastal long-distance tide level based on corrected residual water level and verifies it in dredging projects.

Abstract:According to the advantages of flexible floating breakwater which has better cover on short wave,long wave,proposes a log damping type flexible floating breakwater structure.Based on the regular wave physical model test in a two-dimensional water tank,this paper studies the wave dissipation performance of the flexible floating breakwater with plate and without plate,and the test results are compared and analyzed.The experimental results show that the flexible floating breakwater has a good effect on short wave and long wave,and the flexible floating breakwater with plate is better than the flexible floating breakwater without plate.

Abstract:The bottom erosion of propeller to the vertical wharf becomes more and more serious.However,Chinese port engineering standards lack this kind of calculation.The paper studies the calculation of bottom scouring velocity of vertical wharf.Taking Abidjan port expansion phase I project under construction as an example,the paper compares and sums up two calculation methods of bottom scouring velocity from the Netherlands and Germany,which provides references for bottom protection design of vertical structure.

Abstract:The wave attenuation performance of multi-body floating breakwater is an important factor to determine its application value.Based on the three-dimensional diffraction theory,using the software of Ansys Workbench and AQWA Graphical Supervisor (AGS),the effectiveness of wave attenuation of the rectangular multi-body floating breakwater with different wave heading angle and draught of pontoon is studied.It is found that multi-body floating breakwater can reach the lowest transmission coefficient at 90 degree heading angle.Increasing the draught can decrease the transmission coefficient of multi-body floating breakwater,but declines the stability of structures.Therefore,we try to ensure that the floating breakwater head sea surface is perpendicular to wave direction,so that it can get a better wave effect.At the same time,we try to avoid to choose the large draught floating breakwater.

Abstract:The vertical bearing characteristic and instability mode of all-vertical-piled wharf in offshore deep-water is studied with a structure-foundation 3D elastic-plastic finite element model.The results show that the vertical bearing characteristic and instability mode of all-vertical-piled wharf in offshore deep-water is closely related with the strength of the foundation soil.The vertical ultimate bearing capacity of this structure is decided by the strength of the foundation soil when there is soft soil foundation,while the vertical ultimate bearing capacity of the structure is conducted by the strength of the foundation soil and the pile when there is hard soil foundation.Therefore,the influence of the adverse factors to the vertical bearing characteristic and instability mode of the structure in the design should be taken into full account,such as the softening effect of soft soil which could reduce the strength of the foundation soil.

Abstract:To find problems in time through certain tests is key to control the quality.For conventional precast pile,the domestic related testing methods are relatively mature and integrity,and there are multiple inspection standard or specification.For TSC pile,the means for quality inspection are unclear,and there are not related standards and specifications,which hinders the promotion and application of TSC pile to some extent.In this paper,a suitable calculation method of TSC pile for water transportation industry is put forward.Combined with numerical simulation and field test of low strain test,the feasibility of pile body completeness of TSC is demonstrated.The results show that it is feasible for TSC pile to test the pile body completeness with low-strain test.

Abstract:In connection with the section of reinforced concrete track beam varying significantly under the same mechanical load,two kinds of structural forms of the pile foundation track beam and the elastic foundation track beam are selected respectively under typical wheel pressure conditions.The numerical analysis is carried out by the large-scale finite element software STAAD.The results show that the cross section height of RC beam is an important factor of the internal force of track beam,and the internal force increases with beam height under the same condition.The proper height of section beam of elastic foundation is 0.4～1.0 m.The optimum beam cross section of pile foundation beam is mainly affected by pile spacing,and there is a minimum required beam height under the condition of wheel pressure and pile spacing,which can be used as the design beam height.

Abstract:For construction of dry docks with other buildings already built around it,a new type of docking wall structure with raking pile platform was researched in this paper for the protection of adjacent buildings.Taking a practical project as an example,PLAXIS software is used to simulate the numerical model of the structure.Key factors such as platform size and slope of raking piles are considered while researching the stress of the dock wall structure.These researches prove that the raking pile platform is availability for protection of adjacent buildings.

Abstract:The paper gives a systematic explanation and research on the whole structural durability assessment of high pipe dock.Based on the mature study for the durability of reinforced concrete structure in material,the paper develops a three-dimensional solid finite element model for research.The model which is used for simple durability evaluation of the whole structure，works out the structure internal force responses and deformation.

Abstract:Taking the wharf apron of ro-pax terminal where safety accidents may occur as the research area,we put forward a method of conducting refined arrangement and traffic organization in this area to enhance the safety and convenient level of Ro-Pax terminal.A microscopic simulation model for the operation of ro-pax terminal apron is developed to obtain the values of performance indicators,including population-density,port time,walking distance and time of unloading,etc.Taking a ro-pax berth as a study case,we analyze the impact of function zone arrangement and traffic organization on the indicators of terminal performance and choose the optimal scheme of function zone arrangement and traffic organization.The results show that the refinement arrangement of function zone and traffic organization in the wharf apron of ro-pax terminals would help to reduce the safety accident risks and promote operation’s convenience.

Abstract:The construction condition for the proposed location of Meishan Harbor district automobile ro-ro & general cargo wharf in Ningbo-Zhoushan Port is complex.Adopting the method of theoretical calculation combined with the model experiment,we probe into key technologies including the site selection of the project,determination of wharf’s axial azimuth and the wharf frontage’s top elevation,as well as the hydraulic structure design.The results may serve as a reference for similar projects.

Abstract:Based on the current state of research and application of the large thin-wall cylindrical structures used in coastal harbors and seawalls both at home and abroad,we design a new type of thin-wall cylindrical structure for the channel regulation.Flume experiments are conducted for its stability without overturning.Results show that under the most unfavorable working condition with 34 m water depth,anti-overturning velocities in unfilled,sand-filled and sand-filled with seating cases are 2.90 ms,3.18 ms and 4.95 ms respectively,which can keep different regulation structures stable.The application of this new type of large cylindrical structure in channel regulation buildings,such as spur dike,training dike and submerged dike,will be promising.

Abstract:Some new changes occurred in the distributary reach of south and north channels recently,which threaten the stabilization of the important regulation projects nearby,and may influence the stabilization of the river regime.Based on the comparison of the riverbed data of several years,we analyze the new changes of the distributary of south and north channels recently.The results show that the sediment is silting at the Biandan shoal tail,the Xinxinqiao channel is withering away,the Xinqiao shoal is moving downstream and southwards,some new watercourses are developing on Biandan shoal,etc.The new changes mentioned above threaten the stabilization of the regulation project nearby,such as the Xinliuhe shoal protection project,the Nanshatou gully discharge control project,the reclamation project of Zhongyang shoal,the Qingcao shoal reservoir project,etc.These regulation projects maintain the stabilization of the distributary of south and north channels.

Abstract:According to the future development of high dam navigation structures of tunnel design,combined with the calculation formula of the critical speed of the ship,taking Xiluodu tunnel as an example,the tunnel economy is analysed.We put forward that the analysis of tunnel section economic should be combined with the one-way time through the navigation structure to determine the cross section coefficient of tunnel water,and the best principle is to make the ship through the tunnel of time and one-way time through the navigation structure is basically the same,so the two match.The design speed of the ship is calculated through the tunnel length and travel time,and the cross section coefficient and the design of section size are get,so as to the best balance between transit capacity and engineering investment is achieved.

Abstract:Due to the matching operation of Gezhouba No.1 Lock and the Three Gorges Lock,ships are docked at the navigation wall,the first downwards ship at the upstream navigation wall is close to the miter gates,and the ship after entering the lock is also close to the downstream miter gates.In both cases there are risks of colliding with the miter gates.For the existing risk,the possibility of adding anti-collision facilities for the upper and lower miter gates is analyzed combining with the upper head and lower head in the lock,and three schemes are proposed,i.e. the lifting scheme,the side-opening scheme,and the sinking scheme,the possibility,advantage and deficiency of which are discussed and reference is provided for the design and application of the collision safety device of the miter gate.

Abstract:Heishazhou Waterway is one of the main navigation-obstructing shallow waterways downstream the Yangtze River.After the phaseⅠchannel regulation project,channel conditions are improved gradually.But when encountered the flood years,channel silts seriously so that the phaseⅡof the regulation project is needed.Based on the characteristics of waterway evolution and navigation-obstruction and using movable bed models experiments,this paper researches the phaseⅡof the regulation project systematically and proposes the recommended scheme.After the scheme,river regime of Heishazhou Waterway is no obvious change;the discharge of the right channel increases and the shoal area is scoured.The channel conditions are improved effectively.

Abstract:With the operation of the Three Gorges reservoir,many of the old landslides were newly deformed.The Woshaxi landslide was one of the typical landslides in the Three Gorges Reservoir area,which had been continuously deformed since 2003 and the deformation showed a certain periodicity and regularity.According to the geological survey and professional monitoring data,the landslide deformation characteristics were analyzed,and the influence factors and deformation mechanism were obtained.The results show that the sandstone mudstone and topography provided conditions for landslide deformation.The main factor affecting the deformation was the reservoir water level fluctuation which had saturated loading effect and hydrodynamic pressure effect when the water level dropped down.A huge seepage pressure was formed to the outside of the slope,which resulted that the stability of the slope decreased and the deformation produced.The secondary sliding body is in an unstable state and if the rate of water level increases it will be in an unstable state.Studies provide a basis for the landslide monitoring,early warning and prevention,as well as the reservoir operation.

Abstract:Based on BIM technology of a liquefied natural gas terminal as an example,this article introduces & summarizes some design experience including the parametric modeling,modular collaborative design,fusion applications of model and finite element analysis,construction experience including virtual construction,modular construction and visualization technical disclosure.Based on the preliminary application of construction control platform,the prospect of extended application for the operational phase is put forward,which can provide the reference for the realization of the BIM technology application in the whole life cycle of wharf engineering.

Abstract:The general cargo terminal is one of the most complex terminals in port loadingunloading logistics,which have many uncertain factors.The description,analysis and control of the loadingunloading process have always been an engineering technical problem.This paper analyzes the complex characteristics of the production logistics in the general cargo terminal,summarizes the random parameters of the loading/unloading process,and proposes the modeling methods of the conceptual model and simulation model of the general cargo terminals.Finally,the correctness of the simulation analysis method is verified by a case study.

Abstract:In the waterway reef blasting engineering environmental supervision work of the Yangshan deepwater port project construction,we try to control the adverse effects of the reef on the fishery resources and avoid the irreversible harm to the ecological environment and biosphere.The method of gradually increasing the explosive equivalent is accepted.The damage degree of the reef activity to the marine resources,the ecosystem and the marine biosphere is determined and the solution is provided by the analysis of blasting test.

Abstract:Taking the Tongzhou Bay project’s organization and implementation of dumped rocks as an example,the temporary routes is planned,a temporary connection for change ships is set up,and the scheme to transship and riprap is made.A safe and efficiently special technology scheme of water riprap in the shallow intertidal areas is formed.Furthermore,some matters which should be noticed and optimized in the construction are described.