Abstract:To enhance the applicability of the trestle bridge for train ferries, a novel flexible linkspan is put forward which can be hinged to shore at one end and moved up and down and also left and right at the other end, and hence can be connected to various decks on board to facilitate the loading or discharging of rolling stock. The basic configuration of the flexible linkspan and the assembling feature of its main parts are presented with a description of its working mechanism. The key parameters of the flexible linkspan, such as transverse moving distance of the moving end, turning angle of the linkspan, overhang length of carlings, are also formulated. The initial research outcomes show that the new type of flexible linkspan is feasible and practical.

Abstract:The implementation of coastal engineering will change the regional terrain and affect the hydrodynamic forces and sediment transportation. According to the characteristics of the intertidal zone, using semi-empirical Semi-theoretical formula with submerged depth and submerged velocity, we predicted the sediment scouring and silting within the intertidal zone. Base on the 2-D numerical model for the tidal current,and used the modified semi-empirical Semi-theoretical formula, we analyzed the influence from the reclamation engineering of Xuanmen bay on the changes of sediment scouring and silting within the tidal zone.

Abstract:This paper analyzes the influence of excavation and dock wall on the bearing capacity of the dock slab by software PLAXIS. The results indicate that the current design method is conservative. The pile-soil interaction is taken into account to obtain the vertical load-settlement relationship of the dock slab and the load shared by the pile and soil. The theoretical model agrees with the fact quite well. The comparison of results of the finite element has been carried out with calculated results, which proves its feasibility for the analysis of piled raft foundation of dock slab.

Abstract:The coastal area of Zhejiang is superior not only in geographic location, port resources,hinterland and market, but also in collection and distribution of trades. Thus, it becomes the best location for the coal storage, transportation and trading within the Yangtze River Delta region. Based on the demand of the market, this paper explores the development of the coal storage base, transportation system and logistics market based on the analysis of the regional demand to coal and the transportation patterns, so as to ensure the coal economic security.

Abstract:Based on the field data of wind wave in lake, this paper discusses one-dimensional and twodimensional combined distributions of wind wave heights and periods in lake. According to the analytical results of continuous wave records and various statistic characteristics, the empirical distribution model of wave heights and periods and the joint distribution model of wave heights and periods are derived by methods of mathematical statistics and theoretic analysis. All these results can be adopted in the calculation of wind wave characteristics for the lake area援

Abstract:Based on the analysis of the mutual development of port and regional economy, this paper constructs two evaluation models base on DEA, one of which is a horizontal model to evaluate the port and regional economy and the other is a time-dynamic longitudinal model to evaluate the relationships between them.The horizontal model results show that the port and regional economy of Qingdao are dual-valid, and the regional economy of Weihai is valid but port of it is not. The port and regional economy of Yantai and Rizhao are invalid.It means that the port and economic development of each region in Shandong province is uneven, and there are great differences among regions. Results from the longitudinal models indicate that from 2000 to 2009, the port and regional economy failed to achieve the effective coordination. Finally, this paper proposes some targeted strategic initiatives which can promote the coordinated development of port and regional economy.

Abstract:To solve the problems of resource wasting and environmental pollution in regional port industry development optimization, the regional port industry development optimization model is built with comprehensive consideration on the economic development, resource consumption and environment pollution, applying the maximum green GDP as the optimization objective. The regional port industry development in Shanghai is referred as case study to test and verify the model’s rationality and effectiveness. It is found that the model can give consideration to the aspects of economy, resource and environment to synthetically optimize regional port industry development, which can provide suggestions for the decision-making of the sustainable development.

Abstract:Based on the development of Chongqing Jialing River navigation lock Grass Street Navigation and Hydropower Engineering, on the finite element program ANSYS platform, using parametric design language (APDL) commands, we carried out the simulation analysis to the temperature field during layered pouring of concrete for the chamber structure, and obtained the section’s temperature curve and variation law of the lock wall’s temperature field with time. According to these results, we put forward proper construction measures for the control of the mass concrete temperature, which gained a satisfactory effect. It reveals that the finite element model is able to simulate well the pouring temperature field of mass concrete.

Abstract:Hydraulic structures and water transportation structures are both water-related structures belonging to civil engineering works. However, due to the difference of service clients, design and supervision departments, and the lack of effective communications in the long term, there exists great difference on the main design principals and methods. Thus, the construction period and cost can be different greatly. Take the inland gravitational retaining wall as an example, we bring forward the difference of the design methods and design characteristics between hydraulic structures and water transportation structures, hoping that future structural design can take the advantages of all the engineering works and come up with a unified design method, which will guarantee the safety,durability and economy.

Abstract:For finding out the correlation between the environment temperature and compressive strength of non-steam autoclaved PHC pipe pile, we carried out experimental research on the environment temperature and concrete’s compressive strength. The results show that the effect of environment temperature on the compressive strength is remarkable and effect of environment humidity on compressive strength is inconspicuous.Furthermore, the results also show a good correlation between the product of its time and temperature and compressive strength of concrete, and the time required for reaching 80MPa under different environment temperatures is ascertained, which can instruct the production quality control of non-steam autoclaved PHC pipe piles.

Abstract:Based on the review of the site selection and planning of Yangshan deepwater port, we find out that Yangshan deepwater port has unique geographical advantages, good natural conditions and considerable economic benefit and good social benefits. According to the variation of the seabed deposition and erosion after completion of the north harbor district, through comprehensive analysis based on the numerical simulation,physical model test and navigation simulation technology, we conclude that the half-branch scheme is safe and reasonable for the north harbor district of Yangshan deepwater port. Suggestions on the overall planning of Yangshan port are also given.

Abstract:In the breakwater design, the selection of the size of core stone relates to the construction and cost of the project, and the selection of the type of concrete armor relates to the overall stability of the section and the durability of the block. There must be some differences between the use of Hudson formula for the concrete armor and the rock armor. There are several simple descriptions for the contents stated upon in the Code JTJ 298—1998 (Code for Design and Construction of Breakwater) , for which some suggestions are given.

Abstract:Current pile design methods lack special treatment on the coupling of inclined loads, so the actual conditions of high-piles can’t be reflected accurately. A method for calculating the coefficient matrix of lateral nonlinear springs, which is very applicable in finite pole element analysis, is proposed based on the concept of Newmark spring and the p -y curves formula. Then, The finite element program, which considers the P-effect, is compiled on the basis of the analysis model, and applied to analyze real projects. The correctness and feasibility of the presented model is confirmed by comparing the results of this study with testing piles.Moreover, the influence degree of the rotation on the pile top and P-驻effect is analyzed.

Abstract:The 300 000 DWT floating dock project of Dalian COSCO Shipyard is located in the south-east of the plant, which is to build a 300 000 DWT floating dock, a 300 000 DWT ship-repairing pier and a breakwater. The general layout plan has solved the problem of limited water area with the other company’s harbors, the proper use of the coastline, the reasonable axes of the breakwater, and also the optimization of its length. The pier adopts the caisson gravity structure which is of rich construction experience, while the breakwater adopts the innovated perforated caisson structure, which can resist the sea wave effectively, and make the structure reasonably stressed. Rock-socketed piles are used for the first time as the anchoring of the floating dock, and the“Zhang method”is chosen to calculate the internal forces, which makes the resistance coefficient a constant.

Abstract:To study the docking condition， this paper deals with the impact energy of mooring ships berthing at open terminal under wave action through theoretical analysis and model test. By analyzing the impact energy of mooring ships with respect to the wave height, wave period, water depth and characteristics of the ships,the empirical formula of ship impact energy is presented, which is verified to be reasonable.

Abstract:A detailed research is done on the distribution coefficient of the horizontal force in the highpiled wharf using the finite element software ansys，focusing on the impact of vertical bents’distance and bent numbers on the distribution coefficient. It is modeled and analyzed in six different structures of 5 spans, 6 spans,7 spans, 8 spans, 9 spans and 10 spans and in five different distances of 5 m, 6 m, 7 m, 8 m, 9 m and 10 m respectively. The results show that the impact of the vertical bents’distance on the distribution coefficient is little with the maximum of 4.93%, while the bent number impacts a lot with the maximum of 49.6% for the calculation example in this paper. Reasonable suggestions are put forward to the analysis method of the large wharf structure with many spans and large bents, based on the comparative analysis of the most adverse bent distribution coefficient with the number in the standers.

Abstract:There is a great disparity among the harbor design code of China and BS 6349-4: Maritime Structures and OCIMF Mooring Equipment Guidelines associated with the berth length of open sea terminals: the berth length provided by Chinese codes is longer. A basin experiment is carried out to study the influence of the berth length of open sea terminals on the mooring force and ship movement. The hydrological conditions include wave, tide and wind; the test ship model is a typical 30 000 DWT oil tanker; 3 berth length arrangements are considered in this test. The experimental results indicate that by reducing the berth length and homogenizing the cable length, the mooring force tends to be uniform and the ship movement related with horizontal restrain can be reduced.

Abstract:Open-sea oil terminal’s berth length optimization is a complex multi-criteria decision making problem. Therefore, this paper proposes a multi-criteria fuzzy optimization model for open-sea oil terminal’s berth length. The model is to improve port operations and safety by considering line tensions and theirs nonuniformity coefficients, and vessel motions as criteria, and the best alternative can be identified easily by ranking the value of weighted relative optimal degree. Finally, its application of optimizing the berth length of a north open-sea oil terminal is also given, and the results show that the proposed model is easy to use, reliable and applicable in optimization of open-sea terminal’s layout.

Abstract:Some questions are discussed and analyzed on the contract management of harbor project,including preparing, signing and performing of the contract, especially some important and ignorable points appeared in overseas harbor project, based on the practical observation in the extension project of some port,Angola, and other overseas harbor projects. The recommendation and conclusion may serve as a reference for thecontract management of analogous projects.

Abstract:In light of the 1st-phase wharf of Dafeng port in the Yellow Sea, this paper discusses the design, installation and regular maintenance of cathodic protection by sacrificial anode based on the analysis of the principle and characteristics of this anti-corrosion technology, which may serve as a reference for relative cathodic protection engineerings in the Yellow Sea water area.

Abstract:Regular inspection and assessment for shiplocks by advanced testing technique and analysis approach can effectively prolong the service life of structures. The general process of inspection and assessment for shiplocks is presented, which includes the investigation of structural condition, formulation of inspecting scheme, implementation of field testing, preparation of the inspection report, division of assessment elements,impact factors of verifying calculation, assessment approach and preparation of the evaluation report. Besides, the key technology of inspection and assessment for shiplock structures is expounded.

Abstract:In order to maintain the current riffle and pool morphology and advantageous channel condition of straight reach in the Yangtze River, beach protection engineering would be supplied in the head of Manyusha shoal. It is necessary to study the maximum depth of scour surrounding the engineering for design to determine the ballast width of edge and the key ballast parts. Based on the analysis of the hydrodynamic and sediment component characteristics of the channel, the flume generalization was designed, with the method of flow band advanced to define the boundary of flume. The hydraulic conditions such as the maximum flow, annual possible maximum discharge, and frequent discharge for the experiment were determined. The simulation for the beach protection building such as the sand ribbed soft mattress, concrete interlocking blocks mattress, concrete block platoon type D department and the ripped-rock ballast, etc. were designed, which laid a foundation for the local scouring and deformation experiment surrounding the beach protection.

Abstract:Using the field measurement data of underwater topography and the hydrological data, the river-bed evolution of South Branch in the Yangtze Estuary is analyzed, and the evolution process, characteristics and mechanism are discussed. The results indicate that the river-bed of South Branch remained stable in the past decade generally, and has some changes as follows: 1) The import section of the Baimao sand shoal north waterway deposits, and the south waterway erodes; 2) The main channel of South Branch below the Qiyakou erodes in the north and deposits in the south; 3) South of the Xiabiandan sand shoal erodes in the upstream and deposits in the downstream; 4) The heads of sub-Xinliuhe sand shoal, Xinliuhe sand shoal and Zhongyang sand shoal retreat obviously; 5) The volume of river channel is increased. The evolution characteristics have a close contact internally and the river erosion-accretion shows a top-down transfer process. The main driving factor of the recent erosion-accretion evolution is the flowing sediment in North Branch, and the other two factors are ebb-tide advantage flow and the silty river-bed. These factors will still exist, therefore the river-bed of South Branch will continue the recent evolution trends.

Abstract:Collecting a lot of data of terrain, water level, flow velocity and direction, this paper analyzes the sedimentation rule of Qingyanzi reach which is the fluctuating backwater area after the impoundment of the Three Gorges Reservoir. The following conclusions are drawn: 1) Since the water level exaltation and flow velocity palliation are less, deposition does not occur in general in Qingyanzi reach. This is different from the conclusion of the physical model experiment research; 2) Sedimentation mainly occurs in September and October when the water level is raising, most in Jinchuan moraine, Wuyangxi, Niushi moraine deep channel and Zhuozijiao; 3) Sedimentation area relates closely to the channel pattern; 4) Qingyanzi reach faces the transformation of channel pattern following the operation of the Three Gorges Reservoir.

Abstract:Based on the analysis of depositional environment, sediment sources, underwater topographic change, and shallow sediment activity, this paper discusses the stability of Majia shoal. The results reveal that:(1) Majia shoal is an underwater sand ridge consisting of coarse sandy deposition of over 10m thick, and the sediment source is limited; (2) Majia shoal has not an obvious change in shape and location during the past many years, and the underwater topography has been keeping stable; (3) The shoal sediment is difficult to be washed off even under strong wind and wave, so Majia shoal can keep stable for years.

Abstract:Based on the investigation of the channel current situation and ship type of Shayinghe channel Anhui section, according to the forecast and analysis of the traffic volume, and combining with the standard ship type of the Beijing—Hangzhou Canal, this paper presents the design ship type of Shaying channel Anhui section,and further researches the design channel dimensions of the section. It also gives an analysis and calculation of the channel capacity and proposes the recommended scheme.

Abstract:With the trend of scale extension in coastal bulk cargo port area and the widely adoption of large bulk cargo carriers recently, higher requirements are put forward for both navigation safety and waterway capacity. Safety duration controlling the trailing time between entering-port ships is one of the factors that affect the waterway capacity. Based on Arena-based port navigation operation simulation model, this paper analyses the impact of safety duration on the waterway capacity in different conditions, and the result was applied to real case studies. The simulation results show that safety duration and waterway capacity are negative power correlated, the change of freight traffic direction has little affect on the sensitivity between the two factors, the influence of safety duration on double waterways is more significant while the impact on single-waterway decreases with the increase of navigation duration.

Abstract:The application of local dispersed filling & emptying system in the low-medium head lock not only has the advantage of less structural engineering quantity, but also keeps the characteristics of favorable flow condition, guaranteeing the berthing condition of ships in the lock chamber, and the engineering cost is lower. It can reduce effectively the wave force in the lock chamber during water filling without extending the filling and emptying time, so there is no need of setting a mitigation segment in the chamber and the lock capacity is improved. The local dispersed filling & emptying system provides a new design mode and may serve as a supplement for the revision of the Design Code for Filling & Emptying System.

Abstract:By experimental study on some different forms of navigation walls of shiplock at the serpentine channel, it is shown that adopting arc navigation wall at the entrance area of ship lock approach channel can reduce the transverse and longitudinal velocity of flow at the entrance area of shiplock approach channel and improve the flow pattern. The effect of the inclination angle and curvature of the navigation wall on the flow pattern at the downstream entrance area is also analyzed.

Abstract:The freight traffic volume is a main reference for the planning of waterway grade and construction criteria. According to the characteristics of waterway network region and referencing the four-step estimating method on the road traffic, this paper presents a freight traffic volume estimating method in the waterway network region, with a stress laid on the waterway OD investigation, water freight traffic volume estimating model.It also researches the normal, increasing and transferring freight traffic volume estimating models. Furthermore, the freight traffic volume estimating method in the waterway network region is expounded based on the practice in the inland waterway network of Jiangsu province.

Abstract:For the adequate strength, simple structure and easy manipulation, the radial gate is used widely in water conservation project.The radial gate is a kind of space frame structure which is calculated by the FEM and method of structure mechanics of planar system.Based on the classical shell theory,we analyzed the strong stiffened shell structure.Adopting the singular function, we determined the precise positions of girders and derived the static equilibrium equations and put forward the new method for calculating the sheet frame of the radial gate. The results by this method were compared with those by the finite element method and the planar system, problems of the feasibility and accuracy of this method can be discussed,and the feasibility and computation precision of the method are discussed.

Abstract:Taking Yanguan Lock in Lianyungang as an example, this paper focuses on the operation environment, maintenance and overhaul of the ship lock’s PLC on the basis of the observation of a shiplock for a year. This paper analyzes and generalizes the maintenance and optimization of electrical components such as the stage recorder and limit switch. It also discusses how to maintain and solve the common breakdowns of shiplock hydraulic and other machines & equipment. Moreover, the paper summarizes the maintenance and overhaul of the automatic control system.

Abstract:A lot of dredged materials are produced in the Yangtze estuary deepwater channel dredging project. Meanwhile, a large quantity of filled materials is needed in Hengsha east shoal reclamation projects. So the combination of the projects can not only overcome the shortage of filled materials, but also make the beneficial use of dredged materials. It is a win-win situation. Based on the relative design principles, this paper gives two examples, i.e. Hengsha reclamation project phase 芋and phase 遇. Moreover, some suggestions are given on the further applications in the future.

Abstract:This article introduces the cofferdam design for DSIC. Reasonable modifications were made to the design according to the problems encountered during construction, especially for the water leakage during construction of the south cofferdam. Considering the characteristics of shipyard’s main work and the site condition,this article analyzed the position of leakage and elaborated method for determining the leakage point. Based on the supplementary survey, we adopted a combination treatment of high-pressure jet grouting and curtain grouting. We also put forward detailed monitoring requirements and water pumping method, which ensured smooth accomplishment of the project.

Abstract:The foundation of Tianjin harbor building-repairing base is unstable, the pressure head is high,and the excavation depth of the dockhead reaches 18.2m. This paper describes the stability analysis and excavation implementation of the foundation pit for the dockhead. The practice proves that it is effective to adopt higher construction surface pile follower, dewatering of foundation pits, pieced small -area excavation and timely construction of the upper structure. It may serve as a reference for similar projects.

Abstract:The reclamation engineering design shall consider comprehensively the engineering safety and quality, the convenience in construction, and the engineering cost. The design shall be optimized according to the geologic conditions. Taking the large-scale reclamation project of the middle and lower reaches of the Yangtze River as an examle, this paper probes into the design and construction of reclamation from the selection of materials, optimization of designed cross-sectional dimensions, as well as the operation of the check & evaluation standard, etc.