Abstract:For the maintenance of the well-developed water transportation system，dredged materials of about 200 m3 can be generated from waterways and harbors annually in the United States of America (USA)，and the disposal problem for the huge amount of dredged materials is not inferior to our country.Accordingly，proceeding from the current situation of dredged material disposal，the main development of dredged material management mechanism and disposal technology in USA is summarized.And the beneficial use of dredged material and its engineering cases are analyzed.The investigation shows that it has a dredged material management system with clear right and responsibility in USA，and both U.S.Army Corps of Engineers (USACE) and U.S.Environmental Protection Agency (USEPA) play a key role in the process of disposal management of dredged material.Most of the dredged materials can be used beneficially for the habitat development，wetland restoration，beach nourishment，agriculture and aquaculture.It is now in the phase of research and exploration for beneficial use of dredged material in China，and the successful experience of dredged material disposal management in USA should be worth learning.

Abstract:Time series of wave forces exerting on the element of the jacket structure are measured respectively by the strain approach.Based on Morison equation and small amplitude wave theory as well as the measured results，we evaluate the inertial force coefficient CM and the drag coefficient CD of the Morison equation by the least-squares method，and obtain the fitting formula of CD and CM regarding to KC.

Abstract:The heterogeneity of soil and rock aggregate（SRM）determines its different mechanical properties under equal stress and equal displacement loading conditions.Based on the software of CDEM and the random generation algorithm of rock block and applying equal displacement and equal stress load conditions respectively，we study the uniaxial compressive strength of soil-rock aggregates and obtain the constitutive curves of aggregate with different rock contents.The results show that:1)The strength under equal stress load condition is lower than that under equal displacement load condition.And the difference becomes larger with the increase of rock content;2)With the increase of rock content，the compressive strength of the composite gradually increases.And after the rock content exceeds 30%，the compressive strength increases more quickly;3)With the increase of rock content，SRM’s macroscopic stress-strain curves show gradual strengthening tendency.

Abstract:Taking an air-floating rectangular box for example，we deduce the nonlinear boundary condition of air-water interface at the structure bottom considering air compressibility through adiabatic equation.Based on the 2-D potential flow theory using the analytical solution of eigenfunction expansion and progressive matching method，we investigate the amplitude frequency of wave forces with different water depth-width ratios and different drafts.It is shown that the horizontal wave force increases with draft increasing，but the vertical wave force and the moment declines with the increase of the draft;Wave forces decrease with the increase of the water depth，and the change of wave moment caused by vertical wave forces is more obvious than that caused by horizontal wave forces.

Abstract:Entrainment of the topsoil at Tiaozini beach is vulnerable to water flow，and it leads to the collapse of embankment toe，thus protection measure shall be taken.Appropriate protection measures are associated with the threshold velocity.The threshold velocities of the fine silty sand sampled from the topsoil at Tiaozini beach under different water depths are tested by indoor experiments，and compared with those calculated by several widely used calculation formula，including Zhang Ruijin，Dou Guoren，Tang Cunben，et al.Based on the results of the experiments，suitable formula for the threshold velocity of fine silty sand of topsoil at Tiaozini beach are proposed.

Abstract:The test process and data analysis has a important influence to similar material on the indoor model tests.On the basis of previous research of bedrock similar material，the weight ratio of barite powder plus sand to gypsum powder，the weight ratio of barite powder to sand，the weight ratio of water to gypsum powder are selected as three kinds of combination，and each combination set three levels，a total of nine groups of material proportioning is designed by the orthogonal design method，by optimizing the matching we finally get the recommended value of the excellent performance of the model material ratio which can be used in rock-socketed pile model test.The tests results show that when similar material density meets the requirements，using ordinary plastering gypsum as cementitious materials，the variable range of compressive strength and elastic modulus of the material is small and can’t meet the needs for rock similar material in different physical model test;using the alpha high-strength gypsum powder instead of the ordinary plastering gypsum powder can improve the material strength and elasticity modulus of the material and it makes the similar material which made by barite powder，sand，plaster and glycerin can simulate most of the basic characteristics of rock materials.

Abstract:After Northeast Eastern Railway’s connecting，how to optimize the original sea-train transport structure of the imported iron ore in the northeast region has become the focus of each port across Liaoning coastal.The article analyses the profiles of the importing iron ore integrated transport system，and summarizes the existing problems of its railway transport system development.The optimal transport program is computed through the multi-objective linear programming mode，such as the transportation cost，service level，energy consumption，etc.It poses the low-cost transportation solutions of the iron ore imports transport system，and researches the countermeasures of optimizing the transport system construction in the east of northeast China.

Abstract:Vertical breakwaters，sea dikes and sea walls are often used in port and costal engineering.The overtopping discharge of a vertical structure needs to be estimated in engineering.So far，the calculating method for the mean overtopping discharge of vertical structures has not been given in Chinese port engineering specifications.So，we summarize several major calculating methods for the mean overtopping discharge of vertical structures.A comparative analysis of mean overtopping discharges estimated by different calculating methods at different water depths and wave parameters are carried out，which can be used as reference for practical harbor engineering design.

Abstract:The comparison between the cable force of prototype observation and numerical simulation is conducted for the first time.The result shows that the stress situation of each cable can be well simulated by software Optimoor in the process of mooring.Using the software to calculate the force distribution of each cable under the condition of adverse wind，wave and current，we draw a conclusion that the wharf is in the safe and stable condition for mooring.

Abstract:With the improvement of the construction technology of inclined piles in the bedrock，it turns possible to adopt the rock-socketed inclined pile in inland river overhead vertical wharf.In the engineering of Guoyuan port phase II project，we put forward the overhead vertical wharf with inclined rock-socketed piles，and use the finite element numerical simulation method to analyze the internal force and deformation of the structure.Meanwhile，we compared its stress feature with that of the original design scheme.The result shows that the overhead vertical wharf with inclined rock-socketed pile can satisfy the requirement of Guoyuan port，and it has a better adaptability，thus it may serve as reference for the structure selection of inland port construction.

Abstract:Taking the 50 000 t bulk carrier in the condition of out of control vertical impact to a high-piled wharf at a speed of 1 ms for example，we simulate the impact process using the finite element software，acquire the corresponding energy change during striking and ship’s impact force time history curve，and compare it with the result of specifications.Meanwhile，analyzing the deformation and damage of wharf structure，we put forward measures to prevent the damage of wharf structure under the uncontrolled ship’s impact，which provide theoretical supports for the design，maintenance，and transformation of similar wharves.

Abstract:The flexible pile clusters are widely used in the renovation engineering of the passenger wharf and old wharves to solve the problem of ship berthing，but the stipulations in the code concerning the ship impact can’t satisfy the requirement of the pile’s maximum displacement.This paper discusses the pile internal force and deformation of the berthing pile cluster structure under the action of ship impact forces from multiple angles，and suggests to calculate the maximal displacement of piles and internal force within the ship impact force angle within the scope of 70°～80° during the design process to meet the operation requirements of the structure and to provide some valuable reference for the structural design and calculation，safe use and reliability evaluation for the berthing pile cluster structure.

Abstract:According to the vibration differential equation，the residual force vector expression was deduced in detail.As a structural damage index，the absolute value of the residual force vector was defined.By establishing high-piled wharf pile finite element model and using the residual force vector method，we carry out the numerical simulation for the pile of high-piled wharf damage diagnosis under a variety of conditions.The simulation results show that taking the residual force vector as diagnostic indicators are more sensitive to damage.The damage of structural can be identified quickly and accurately using low order modes parameters.

Abstract:The stability and wave dissipation characteristics of breakwater reflect the important indicator of project quality and the function of the breakwater directly.The study of section stability，wave pressure and overtopping of Venezuela Puerto Cabello container terminal large-diameter cylinder breakwater under the effect of hundred years of random waves is based on the three-dimensional model test in wave basin.The test shows that the pressure on the forward direction of the cylinder is the highest;with the increase of water depth，the wave pressure shows a decreasing distribution;the maximum wave pressure of the wave wall appears in two-thirds of its height，and at this point，the wave pressure on the trim surface of the breakwater wave is the highest;at the junction of the parapet and the cylinder，because of the effect of overflow on both sides of the semi-circular parapet，the maximum wave pressure appears at both sides;and there is an overtopping phenomenon at the top of the parapet.The main causes of the wave height behind the breakwater are overtopping water and the wave which transmits through the cylinder.The wave trends stable after 150 m of the breakwater;the distance between the cylinders has little effect on the wave pressure on the cylinders wall，while the effect on the wave pressure on the parapet is much more obvious.

Abstract:Based on the international trade environment，the latest situation of China’s national economy，foreign trade development and industrial layout adjustment，we analyze the periodic characteristics of the national coastal port development and macro-environment，and propose the concept of ability to assess wharf，analyze the constitution of the statistical data of ports’ throughput objectively，and discuss the general adaptability，regional adaptability，development structure adaptability and industrial layout adaptability of coastal port assessment ability to the transportation demand.

Abstract:Aiming at the problem of the reinforcement effect of the carbon fiber on the beam of long-piled wharf，we present the static test of the approach bridge of long piles wharf before and after the reinforcement of carbon fiber with the concept of bridge static test.The improvement of bearing capacity of the wharf with the reinforcement of the carbon fiber is obtained by comparisons of the settlements and stresses before and after the reinforcement.In the meanwhile，it is also examined whether the beam structure satisfies the design requirements or not.The analyses of the test results reveal that the strengthening effect of carbon fiber on the beams of long piled wharf is significant and the method can be spread.

Abstract:To address the issue of stockpile information sharing for the whole stockpiles in the bulk port，we present a research program based on the distributed shared memory (DSM) technology，on the basis of the intelligent stacking and reclaiming control system.The data sharing function of multiple server systems for material machines is realized in the central control room，and the operator can obtain quickly and accurately the stack-type data of the material pile.As a result，the rescan time is saved for the material machine，and the stacking and reclaiming efficiency is improved.

Abstract:Based on the practical project，we carry out the deformation analysis of the steel corridor at the top of a pre-reinforced concrete coal silo under heavy loading and make a comparison of the structural steel weight with each other when the transverse beam at the bottom of the silo top house adopts solid web steel I-beam，irregular cross-section steel beam，truss and plane beam string structure respectively.

Abstract:Based on the analysis of the plane configuration characteristics of 25 main curved channels in Yibin-Chongqing reach of the upper Yangtze River，we probes into the changing rules of characteristic parameters as follows:the curved reach expanding rate，shrinkage rate，bending，bend angle at centre，ratio between swan river width and average river width，ratio between radius of center at curved top and average river width of characteristic value change rule.The results show that most curved channels are narrow at both ends and wide in the middle part，some curved channels are sharp bend and very apparent broadening and sag;the bend angles in the centre are between 60°and 130°，and most bends’ central angle is greater than or equal to 90 °;the sinuosity of most curved channels is over 1.20.The navigation-obstructing characteristics and forming mechanism of the bend plane morphology are also analyzed.The above results may serve as reference for the planning and construction of port and waterway engineering，hydraulic engineering，municipal engineering and ecological engineering，etc.

Abstract:To counter the phenomenon that the total siltation in 250 000 DWT approach channel at Lianyungang area is less than 150 000 DWT，we probe into the cause for it based on the analysis of the actual measured data about channel siltation and dynamic environment of water and sediment before and after engineering by the flow mathematical model.The result indicates that both dredging engineering and encircle breakwater engineering will have impacts on silting of the approach channel，but the breakwater is more essential.Dredging engineering mainly makes the flow rate of the channel slow down and hence it slightly increases the channel siltation;encircle breakwater engineering makes the flow rate near the entrance increase significantly so that the approach channel siltation reduces sharply.In addition，the protective effect of the encircle breakwater prevents the sediment from entering the port and then the siltation of inner fairway section also decreases in a large scale.

Abstract:The hydro-floating shiplift is a new type of shiplift.Based on a hydro-floating shiplift project，we probe into the selection of filling and empting system valve and the characteristics of plunger valve.With a scaled 1:10.667 physical model，we research the flow coefficients，wall fluctuating pressure，critical cavitation number and cavitation form of the sudden enlargement and three-branch pipe，and explore the hydraulic priority of the sudden enlargement design for the flow passage behind valve.This study provides reference for the research and design of the valve section of hydro-floating shiplift filling and empting system.

Abstract:To counter the contradiction of water navigation，power generation and agricultural water，the Feilaixia second-line and third-line locks were planned to be operated by water-saving mode during water filling and emptying.Hydraulic model experiments were carried out to study the characteristics of water-saving and the benefits.The water-saving ship locks of double lines were compared with the single lock，and the result showed that water-saving ship locks could save 2.89～3.77 million tons of water，and generate 13.5×106～17.5×106 kW?h of hydropower energy.Thus the conclusion is drawn that the water conditions of chamber and approach channel are more favorable，and the berthing conditions in the chamber are better.The ship locks of water-saving satisfy navigation requirements，and the water-saving ship locks will have remarkable economic and environmental benefits.

Abstract:It is difficult to regulate the high-gradient gravel river due to the special bed form and flow condition.The facilities over the river such as levee engineering and bank protection project are often damaged at serious flood，but the research on it is less.The high-gradient gravel river is characterized by shallow water depth，indistinguishable shallow and channel，steep gradient，large flow velocity and plume easily formed when flow is dispersed in the dry season.According to the scour features，we design the generalized model test about different bed material gradation，different scour angle，different riverbed gradient and different discharge.Based on the single factor analysis，we find out main influential factors with 81 groups of experimental data that the scour depth (Hp) is proportional to the single discharge (q)，the channel slope (J)，and the scour angle (θ)，and it is inversely proportional to the composition of bed material particles (D).By the dimensional analysis and multivariate regression analysis methods，we achieve the simple formulas about scour width and scour depth for the high-gradient gravel river.

Abstract:Since the 175 m test-operation of the Three Gorges Resevoir (TGR)，the sedimentation law of Zhanqizi waterway，which is in the Three Gorges Reservoir tail，has changed.The sediment accumulation brings about navigation problems during the sluicing period，so maintenance and dredging is very necessary for ensuring unimpeded passage. Sediment accumulation of Zhanqizi waterway is mostly because of the storage in the flood recession period and the main stream is dispersed during the sluicing period.This paper analyzes the sediment changes characteristics and causes of this change annually and inter-annually and offers proposals for the waterway maintenance in the days to come.

Abstract:The second-line ship lock is planned on the right of the first-line ship lock，but the flow pattern in the approach channel is very complex when the double locks are irrigating or draining.Adopting the volume control method，we establish a two-dimensional mathematical numerical model of hydrodynamics to evaluate the navigation condition of the approach channel.The calculation results of various working conditions show that double locks’ simultaneous running is the most disadvantageous.In this case，the minimum water depth of the lower approach is enough，however，the flow rate is too large，and there is a certain impact on the safety of the ship.According to the calculation results，the relative displacement of the discharge time can reduce the maximum longitudinal velocity.

Abstract:Due to the changes in water and sediment conditions of the library after the impoundment operation of the Three Gorges reservoir，which caused riverbed erosion and drawdown in a long distance at downstream of the dam.Chenglingji water level was estimated to drop 1 m to 2 m after the reservoir operation from 20 to 50 years.The effect on Dongting lake area Xiangjiang tail fairway under dry circumstances was evaluated by calculating the water level drops with the hydrodynamic model.The results show that the lake’s waterway surface slope will increase if Chenglingji water level drops 1 m to 2 m under dry circumstances，and water levels and channel depth will reduce significantly in the distance of 80 km from Xiangjiang Dongting lake outlet channel to Xiangjang lake area channel Yingtian beach，which may result in a significant deterioration of waterway conditions.Meanwhile，the renovated shoal’s water depth will not be able to achieve the grade 2 fairway standard.

Abstract:The Tongluoxia reef-blasting scheme is demonstrated by a 2-D mathematical model.The measured surface line and the velocity distribution of Tongluoxia reach are verified by the model，and the calculation results are almost consistent with the real-measured data，which can simulate the actual water flow motion correctly.After the program implementation，the navigable channel flow conditions of the Tongluoxia reach change little when the water level equals to the design level and 2 m above the design level，the section’s average water level reduces within a small range，the average velocity profile and gradient have no obvious change，and the reef-blasting area has enough design depth;Tongluoxia reach’s flow condition is favorate，the left-side flow direction in the channel is straighter then that of the previous scheme，and the flow velocity is generally small.The channel navigation conditions are better after the reef-blasting scheme is carried out，which shows that the reef-blasting scheme is feasible.

Abstract:In order to solve the problem of navigation-obstruction mechanism of large ships sailing in the reservoir tail reach and improve the shipping benefit of the three gorges reservoir，we planned the channel dimensions of three Gorges reservoir area downstream Chongqing Jiulongpo as 3.5 m×150 m×1 000 m.Under the new impoundment of three Gorges reservoir conditions，we check the designed lowest navigable level of navigation-reef river of the Three Gorges fluctuating backwater area，probe into the influence of regulation scheme on the designed lowest navigable level by a long reach one-dimensional flow model，and check the overall effect of regulation scheme.After implementation of the rock-blasting scheme，the channel under the designed lowest water level meets basically the planned standard except for Wangjiatan section，and the sectional hydraulic indices combination meet the 3 000 ton ships self-propulsion critical condition on the beach.

Abstract:Yaojian reach is a famous navigation blocking reach in the middle Yangtze River.The construction standard by 2020，set by the General Outline of the Yangtze River Main Channel Developing Plan，is 3.5 m×150 m×1 000 m（depth×width×bending radius）and at a navigation assurance rate of 98%.Considering the external factors such as the operation of the TGP and flood prevention，we have implemented Yaojian reach 1st phase construction and Wuguizhou protection construction successively since 2009 on the principles of “combining the future and recent，and implementing by stages”.The navigation channel has been improved obviously and satisfactory effect has been achieved the construction implementation.Based on the existed research achievements and data since the project implementation，we analyze the channel variation and channel condition after the project implementation and summarize the regulation experience for the reach.

Abstract:Beheaded isolated rock refers to the isolated rock of dramatic ups and downs on longitudinal of the riverbed and in shape of fracture，which causes deep sag in the upstream riverbed.The conventional regulation method is hard to obtain better effects due to the special beheaded boundary which makes its flow condition more complex.Based on the Zhuanzaozi shoal in the fluctuant backwater of Three Gorges reservoir in Chongqing city，we probe into the regulation method of beheaded isolated rock using the river model test，and propose to combine rock blasting with the submerged fish-mouth connecting dikes to regulate the beheaded isolated rock shoal.

Abstract:Comparing with the traditional earth rock cofferdam，the steel pile cofferdam has advantages of small cross-section and higher retaining water head when it is used on the soft clay foundation.But due to the lack of systemic theoretical calculation，the empirical or semi-empirical design and construction is low in safety assurance rate，therefore its application in engineering is limited.Combining with an engineering example，we present the main indicators and calculation methods which may affect the stability of the steel-pile cofferdam，and the result may serve as reference for the design and construction of similar projects.

Abstract:The land behind the inland reservoir pier is steep and with complex terrain conditions and the construction of pier often faces a large water level difference and large backfilling.So，the pile foundation bears both the construction load from the upper structure and the effect from the bank slope’s backfilling construction during the construction period.Using the finite element software plaxis，we analyze the pile foundation’s bearing capacity under two modes including building pile foundation first and backfilling first，and get the conclusion that all measures including increasing the thickness of backfill，increasing the slope gradient，increasing the severe of slope backfill material，reducing the friction angle within the backfill material，reducing the depth of rock-socketed，are not conducive to the improvement of the backfill slope pile’s bearing capacity.It provides a theoretical basis for the pile foundation design of wharf engineering in inland reservoir.

Abstract:The heterogeneous soil foundation is more and more commonly used in the port engineering.In view of the calculation of the bearing capacity of heterogeneous soil，we compare the methods with the original code (JTJ 250—1998) from the theoretical assumptions and calculation model to analyze the calculation formula and parameter in the Code for Soil Foundation of Port Engineering (JTS 147-1—2010).The influence of the hard upper soil layer on the calculations results by two methods is studied based on engineering examples.The conclusion can provide reference for related projects.

Abstract:The effect of gravity often costs time and effort in stability calculation in combination of multi-load case and multi-scheme.An algorithm based on the computation geometry is introduced to simplify the calculation of the gravity structure’s stability.The design section is cut to sub-polygons by water level after its convexity concavity is judged.The area and barycenter of sub-polygons are calculated respectively considering whether the concave point insists in it.Then it is summarized to deduce effect of gravity and safety coefficient.A set of computer program is compiled based on the above algorithm，which is tested and verified by the application in a ship lock project.

Abstract:Based on the verified finite element parameters of a project，we carry out load tests with sleeve and under excavation of piles of slab in dock by the software of ABAQUS，and discuss the changes of the bearing load of pile due to the depth and radius of excavation，depth and location of support wall.Through this study，the basic knowledge of the effects of excavation on pile foundation of slab in dock are initially obtained ，which is of some referential significance for the improvement of theories for piled foundation design.

Abstract:The main pile with inlaid sheet structure is a type of sheet-pile wall with complicated force conditions.When the deformation of inlaid sheet increases，it will produce soil arching effect on the structure’s back side.Based on the introduction of soil arching theory，we build a plane strain model by ABAQUS software to study the impact of structure size and soil properties on soil arching effect.The results indicate that the structure size has a greater contribution to the effect.To a certain extent，the effect of soil properties is relatively small.In the design of main pile with inlaid sheet structure，in order to give full play to the soil arching effect and save project cost，main pile interval could be increased appropriately，and inlaid sheet thickness should be reduced within a certain scope.

Abstract:The dredger fill plastic drainage plate’s clogging induces the drainage channel’s clogging，and thus leads to poor drainage and unsatisfactory effect of foundation reinforcement.Combining the project of Dayaowan bay dredger fill foundation treatment，we design an indoor test program to test and analyze the filter membrane’s clogging under the condition of vacuum pumping.

Abstract:Based on the Fuchun River lock expansion and renovation project，we simulate the temperature and stress of different concrete structures by the finite element simulation method，and propose the temperature index and temperature control measures for this project according to the simulation result.The temperature field is monitored in the construction phase，which verifies the feasibility of the control measures involving pouring temperature，surface and upper surface of the insulation，internal water cooling and the control effect.

Abstract:Affected by the level 5 & 6 clay soil of Lianyungang Ganyu port area phase I project，the operation of CSD is rather difficult.Focusing on the CSD’s dredging methods and transportation theory，we solve relevant problems by changing the mud thickness，cut footage，concentration，as well as the flow velocity.

Abstract:During construction of a pipeline bridge in Changzhou，in order to cut down the cost and tighten the construction schedule，we develop the patent technology including rotating hanging arm，dressed soft back cover，and pouring tube with a knocking door at the end，which are successfully applied to the construction of the bridge main pier.Based on the practical engineering，we carry out a comparative analysis of the new and old technology and demonstrate the application prospect of the patent technology.

Abstract:Taking the project of the production supporting base at Bohai gulf of CPOE for example，we introduce the pile sinking technology using the large vibratory hammer and the half-screen，which resolve various kinds of difficulties caused by the pile twisting and pile dragging in the construction of the large-size cold bending steel-sheet piles.The technology is proved to be feasible and efficient.