Abstract:This paper analyzes various factors affecting the transmission coefficient through experimental simulation, and presents the variation law of transmission coefficient under various combinations of factors.Comparing the experimental results with those of predecessors, this paper analyzes the differences between the results of the experiment and the predecessors. Moreover, the submerged dike transmission coefficient formula is fitted under either regular wave or irregular wave.

Abstract:In order to study the specialties of wave slamming on open-piled structures, two-dimensional regular wave numerical models were established based on the software FLUENT. RANS equations were adopted.The standard k-ε equations were used to close the Reynolds equations. VOF method was used to reconstruct the free surface. Through three typical cases of wave slamming on open-piled structures were reproduced, the models were verified by experimental data and the average of peak impact pressure was chosen as the characteristic impact pressure.Then with plentiful simulation the parametric studies had been carried out for different wave steepness, structure geometry and the distance between underside of structure and still water level. Good agreements between the numerical and experimental results were obtained.

Abstract:The current force on a ship is one of the most important design factors of open sea terminal. With the comparison on calculation method in Load Code for Harbor Engineering (JTS 144-1—2010), OPTIMOOR calculation software, BS 6349, Mooring Equipment Guidelines (OCIMF-MEG3—2008) and MIL-HDBK in a same example condition, the calculation results are analyzed and verified by physical model test. The study result shows that the error of calculation in Load Code for Harbour Engineering (JTS 144-1—2010) is large, when the current angle is between 15°and 165°, but some foreign standards’ calculation results are identical with the physical model test data. Therefore, it is better that transverse current force is calculated by the formula in BS 6349 and longitudinal current force is calculated by the formula in Mooring Equipment Guidelines (OCIMF-MEG3—2008).

Abstract:Siltation in the rivers downstream of floodgates is serious in China, making the discharge capacity of rivers decrease obviously and threatening the flood control in upper rivers. Tidal wave deformation is one conclusive dynamic factor leading to siltation downstream floodgates in estuaries. The hydrodynamic characteristics of tidal wave deformation are different with different river lengths downstream floodgates, so the fluvial processes and morphology characteristics are also different. A 2D numerical model is established to simulate the tidal wave deformation with different-length river downstream the floodgate. The changes of tidal level, flow velocity and phase difference are simulated before and after the construction of floodgate. The length of river downstream floodgates influences tidal wave deformation obviously, and several conclusions are obtained to provide a theoretical basis for the prediction and analysis of the siltation characteristics in the lower reach caused by floodgates with different lengths in estuaries.

Abstract:The National Coal Emergency Reserve System has been launched since March 2011. To understand the purpose, meaning and requirements of the coal emergency reserve and grasp the selection principles of reserve sites, undertaking enterprises ,reserve ways and related policies are the basic works of implementation of the national emergency coal reserves strategy.

Abstract:Based on the observation of the current at several stations conducted synchronically in winter and summer respectively in Lianyungang nearshore area, we analyze the variation characteristics of tidal current, and the type, motion form, maximum velocity and direction of tidal current with the tidal current elliptic factors calculated by the quasi-harmonic method. The results show that the velocity and duration of flood current and ebb current are different. The tidal current is classified as regular semidiurnal tidal current in shallow water. The tidal current is rectilinear current in the nearshore area. With increasing depth, the rotating flow is apparent, and most directions are counter-clockwise. The variation of the maximum velocity and direction are obvious in different seasons.

Abstract:In the use of a tidal mathematical model to optimize the layout of the encircled breakwater in Xuwei port, the maximal velocity in the port area is considered as a very important index. It is found through analysis that the maximum velocity is related to the waterside area, the flow section area of port entrance, and the tidal range and last of flood tide. According to the simulation results of the mathematical model, we develop an empirical formula to calculate the maximum velocity, which can be used to estimate the design plan in preliminary evaluation.

Abstract:Bending channel is common in inland waterways. Due to the complex flow conditions, which increased the difficulty of ship maneuvering, we need to regulate the bending channel to improve the navigation conditions. The bending channel’s 3D flow model and ship maneuvering motion numerical mode are jointly used in Yiyang to Lulintan waterway project to evaluate navigation conditions based on the simulation results, which provide a scientific basis and guidance for the regulation project of bending channel.

Abstract:The behavior of short-term axially preloaded concrete columns with FRP confinement under axial loading is simulated using finite element method, and the computing results are compared with the test ones.The comparisons show that proper analysis model can accurately simulate the axial compressive property of FRPconfined concrete columns. Then a parameter analysis is carried out to investigate the impact of longitudinal reinforcement ratio, volumetric lateral reinforcement ratio, concrete strength and restrain stiffness of FRP on the bearing capacity of columns and the load-strain curve under different preloading stress levels.

Abstract:Code of Hydrology for Sea Harbor and Code of Design and Construction of Breakwaters provide the calculation method of wave force for breakwaters crest. But there are some differences between calculation results and physical model test. Combining with the project example, this paper compares and analyses the calculation results by current codes and physical model tests to summarize the actual stress mode of breakwater’s crest and to provide reference for similar projects.

Abstract:During construction of port projects, it will produce tremendous economic benefit to use dredged materials for land reclamation. Meanwhile, it will affect the exchange of seawater and change local marine hydrodynamics, thus it will exert an adverse effect on the marine environment. In order to protect the marine resource, we shall grasp the situation of water exchange after reclamation. Based on numerical simulation, and according to the international codes, we analyze the variation law of water. By calculating the width of the flow crosssection,optimizing the design of water culverts to accelerate the exchange of seawater, we achieve the objective of protecting the quality of seawater.

Abstract:The moving loads, which is often used in engineering calculations, is not included in the load module of the large general-purpose finite element software ABAQUS/CAE until now. So the finite element calculation of structure under the effect of the moving loads has been bounded. The author takes a new way to research the simulation method of the moving loads in ABAQUS, respectively from the subroutine development and the ingenious modeling based on the idea of “the moving platform with a load”.

Abstract:The checking of rock slope’s plane sliding includes the internal structure of rock mass surface checking and rock shear strength calculation. The sliding of homogeneous rock slope is due to insufficient shear strength. By assuming the relationship between the failure surface and the internal friction angle, we probe into the relationship between the failure angle and internal friction angle, and then propose the simplified estimation formula. Comparing the analytical solution with the numerical solution, we know that the simplified formula meets the engineering requirements, and the conclusion may serve as a reference for the practical engineering.

Abstract:A comparative study was made on seismic design of port and harbor structures based on the Chinese code, US guidelines and Japanese standards as well as guideline of International navigation association.This is the fourth of the series papers and briefing the methods of design of gravity type quay wall and sheet pile bulkhead. It is shown that, for the design of gravity type quay wall, the seismic coefficient is height-dependent in Chinese code and deformation-decisive which is based on analysis of seismic hazard in Japanese standard. For the design of anchored sheet pile bulkhead, the method for computing tie rod force and moment in sheet pile are different in these codes.

Abstract:Based on the case of Naxigou port in Three Gorge reservoir, taking advantages of the finitedynamic simulation method, we establish the collision model between ship and frame-pier wharf by non-linear analysis software ANSYS/LS-DYNA. In order to simulate the interaction among the ship, the frame-pier wharf and the rubber fender more accurately, we take the cushioning effect and energy absorption of rubber fender into consideration in this model. The influence of various factors are also analyzed.

Abstract:It is a simple and practical method to research nearshore random waves propagation and transformation by the application of the energy balance equation. This method has been used in oceanography and coastal dynamics widely. In this paper, the energy balance equation considering the diffraction effect is used as the control equation to calculate the random wave propagation and transformation. Based on the control equation, a numerical model is established considering comprehensive effects of wave shoaling, refraction, diffraction, reflection and breaking. The random wave propagation and transformation in the harbor basin of Weihai dockyard is simulated using this model. Example results show that the calculated values are in good agreement with the experimental values under the same considered cases. It indicates that the model is practical and reliable to stimulate the nearshore random wave propagation and transformation.

Abstract:In the design of a large crude oil terminal, through optimizing the wharf axis and pier’s layout based on an in-depth study on the local natural conditions, we achieve the aim of saving shoreline resources,improving the berth conditions, and reducing the operating cost, optimize the fender design and improve the manufacturing technology of loading arm’s swivel joints through continuous exploration, carry out basic work for structures’ whole-life design by burying stress monitoring equipment in the main concrete structure, and apply the quick pulley for the first time in a formal project to enhance the constraints on the ship. Moreover, we work out an operation manual and summarize technical and management experience during implementation of the project. Many of the engineering design concepts and features provide a reference for similar dock construction.

Abstract:This paper analyzes the shortage of traditional wharf mooring berthing facilities in upstream of the Yangtze River and proposes the berthing row pier structure based on Chongqing Naxigou wharf project. It is shown that the berthing row pier increases the bent spacing and reduces the underwater workload, thus it can solve the problem of tight operating days because of the raising of reservoir elevation and change the traditional “close-row piles” . It also solves the problem of river siltation near the wharf. The finite element analysis result on the berthing row pier shows that the berthing row piers are set reasonably and reduce the distribution loads on other bents.

Abstract:In view of the suggestions from the newly issued Design and Construction Code for Open Type Wharf on Piles that slab effect should be ignored for calculating internal force of longitudinal beams and cross beams in spatial structure calculation for beam-slab wharf on high piles, we take a structural section of a high-pile wharf project in Zhanjiang as an engineering example, and establish several spatial structure calculation models by ANSYS to study two modeling methods of ignoring slab effect and analyze the slab stiffness effect in spatial structure calculation for beam-slab wharf on high piles by comparing the calculation results of various models. The comparison results show that setting the elastic modulus of slab to the minimum value is a convenient and feasible method of ignoring slab effect in spatial structure calculation for beam-slab wharf on high piles, which provide a reference for high-pile wharf designers.

Abstract:This paper analyzes the main factors of the general layout of Rizhao-Yizheng 300 000 DWTcrude oil wharf, including the relationship between the crude oil wharf project and the overall planning, naturalconditions of the engineering region, as well as the relationship with the neighboring projects, etc., and researchesthe key technology including wharf axial line and wharf layout. The research results may serve as reference forthe design large oil wharves.

Abstract:In order to better understand the relationship between port logistics and regional economy and develop a proper interactive development strategy, the paper selects the data of the port logistics and regional economy of Nantong in 1990-2011, and makes an empirical research and analysis on the interaction with Granger causality. The results show that there is a one-way causality between port logistics and regional economy of Nantong.The promoting effect of port logistics to regional economy is more than that to port logistics from regional economy.

Abstract:The steel tube tower structure is widely used in the wind power industry. The tower, as the main bracing member, is characterized by simple and beautiful architectural appearance, simple structural form, and convenient construction. However, the steel tube tower structure has not been applied to the existed navigation mark engineering. In order to promote the application of the steel tube tower structure in port’s navigation mark engineering and similar inland river engineering, this paper presents the connecting method of steel tubes, jointing of the tube with the foundation, as well as the type selection of the foundation, and expounds the design and calculat ion of the navigation mark of steel tube tower structure based on the engineering examples which have been completed.

Abstract:This article introduces the traction and vulcanization technology of the conveyor belt based on the installation experience, expounds the procedure of conveyor belt traction and vulcanization,equipment and tools required, as well as related calculations and key points of quality control. It can be a reference for installation of the belt conveyor system and maintenance in water transport project,metallurgy industry, and coal industry, etc.

Abstract:This paper discusses the waterway surveying technology including determination of the lowest navigable stage, river terrain surveying, waterway drawings and waterway regulation design and achievement evaluation proposed by Mr. Huang Jian-jiu, expounds articles in current codes, and advances matters needing further research and work to be done, so as to develop an academic discussion.

Abstract:The widely adoption of large coastal bulk cargo carriers brings in higher requirements for matched waterway conditions need to be satisfied. Therefore, this paper establishes a simulation model for ships navigation system in coastal import bulk port area to study the impact of First Come First Service (FCFS), Large-tonner-ship Priority Service (LSFS) and Ship Entering and Leaving Port in Cluster (SELC) on waterway capacity. The results show that the relationship between waterway capacity and port service level is exponential for these three rules,and the impact of FCFS and LSFS on waterway capacity is basically the same. SELC improves waterway capacity of larger scale port area with longer travel time in waterway.

Abstract:Based on the analysis of the navigation channel situation in five rivers tail of Jiangxi province, this paper probes into the possibility of building the high-grade channel network due to the construction of the Poyang lake hydraulic engineering (PLHE). The hydro-dynamic numerical model of the river network is used to study the effect of navigation water level, navigation mileage and backwater area on different regulating water levels of the PLHE. For building the highgrade channel, the lowest regulating water level of the PLHE should be larger than 15 m.

Abstract:To provide sand for reclaiming foundation of Yangtze Petrochemical Co., Ltd., the paper presents the way to mine sand in the planed channel managing and dredging areas in Baguazhou left braided river of the lower reaches of the Yangtze River. Adopting necessary waterway and navigation safety measures without affecting ships’navigation, we implement sand mining, river dredging and channel maintenance simultaneously, and achieved the result of saving the cost for businesses, stabilizing the pattern of Baguazhou branch channel, improving the channel conditions, and realizing a win-win situation.

Abstract:The beach protection engineering was applied for the first time to the head of Manyusha shoal under the dual influences of runoff and tide. In order to ensure the quality, regulation effect, and stability of Manyusha shoal head protection engineering, we carried out some detail treatments for Manyusha shoal head protection engineering based on the analysis of flow characteristics of Manyusha shoal reach in Kou’an straight reach of the Yangtze River and according to achievements of the local scour flume test, by which, not only the stability of engineering structure was ensured, but also the loss of flood damage was reduced and the cost of project maintenance was cut down. It may serve as a reference for related engineering design and construction.

Abstract:Ship lock is one of the main methods for navigation. It usually guarantees ships pass the lock safely. Therefore, the proper design of ship lock is extraordinarily significant. Taking one ship lock project as example, this paper discusses the ship lock structure by finite element analysis, and investigates key factors affecting ship lock’s safety and stability. Moreover, optimization design for ship lock structure is provided.

Abstract:In recent years, lots of beach protection belts used for river improvement in the sand beds in the middle and lower Yangtze river are destroyed. Based on the analysis of the destruction region and type, and considering the water-sediment condition and geologic condition of the construction, several solutions are proposed.The results of some tentative application in other projects verify the effectiveness of these solutions. Thus a relatively maturely type of beach protection belts ias proposed.

Abstract:Based on the analysis of problems concerning logistics for transport in the Yangtze River, this paper puts forward the concept of constructing the logistics public IT platform for transport in the Yangtze River main basin, which is expounded respectively from the system’s logic structure design, functional structure design,and data structure design. Considering the characteristics of logistics for transport of the Yangtze River, this paper proposes the idea on the platform construction and development.

Abstract:The general framework of the Yangtze River’s mainline waterway elements perception and interaction system is designed. At first, the demand of waterway conditions perception is analyzed and defined in macroscopic view, including waterway itself and elements related to waterways directly. The perception precision and real-time requirement are also discussed. Secondly, the framework of the Yangtze River’s mainline waterway elements perception and interaction system is divided into the perception layer, data process layer, internal information interaction layer, information service and announcement layer. The key technologies in perception, transmission and display during the system construction are presented. The proposed perception and interaction reflect the concept of active service, and provides an indication to the implementation of intelligent service system for the Yangtze River wateway in the future.

Abstract:In view of the present our country inland river ship safety supervision, an inland river ship integrated safety supervision platform is designed and implemented. System structure, logic structure, service architecture and key function module of the platform are described, then the platform test result is given. The test result shows that the platform function and performance meet design requirements, and the platform can work stably for a long time. The platform can prevent inland water transportation accidents, strengthen the accident search and rescue, reduce the losses of lives and property of the people, ensure social stability, promote the environmentfriendly development of inland economic.

Abstract:A sludge concentration area will come into shape as a result of using the sand source with high soil content in large area of reclamation operation. In this regard it is an engineering task to be solved to conduct foundation reinforcement of ultra-thick silt stratification, especially exploration of the bearing stratum of earth’s surface. This article provides a reference for similar projects as the foundation reinforcement of extra-thick silt stratification, especially on the formation of the bearing stratum of earth’s surface through learning the key technologies of exploration of the bearing stratum of earth’s surface of the Yangshan deepwater port west III ultrathick sludge area.

Abstract:Sand drain is the representative construction technology for ground treatment by drainage consolidation to deal with the soft foundation. The usual settlement calculation for the soft foundation and the prediction method are defective. Using PFC2D, we set up a two-dimensional model and simulate the process of settlement on heaped load for sand-drained ground with two dimension discrete element. Using 2~7 cluster units of different combination modes, we embody the porosity of the soft foundation, improve the model and analyze the changing rule of water level in the settlement process. The computed results basically tally with the measured ones.

Abstract:The stability and treatment of cataclinal hard-rock slope are very important to construction of highway.This paper deeply analyses the topography, lithologic and tectonic features of stratum, hydro-geologic conditions in one slope. Numerical simulation software UDEC is used to simulate the deformation and failure characteristics of the slope and get the deformation and failure mechanism of it. The result indicates that the joint of weathering and unloading of the slope are developed because of long-time weathering, and the joints are filled with silty clay, thus the shear strength reduces greatly and this leads to the sliding of the moderate-dip cataclinal slopes. The conclusion may be useful for the stability assessment and regulation measures of similar engineering. Furthermore, it proves that the discrete element method is very effective to numerical simulation on bedding rock slopes.

Abstract:Tangshan Caofeidian coal port terminal construction project is a large-scale project with high quality requirements. In order to improve the quality of the projects and the efficiency, we actively use technical methods of adjustable track bolts, GPS system to locate underwater compaction, and anti-crack concrete. We also use some new materials, which guarantee the structures’ durability and appearance qualities, speed up the construction process , shorten the construction period and cost , and achieve the organic combination of economic and social benefits.

Abstract:The PHC pile is widely used in marine projects for the advantages of high performance in pile capacity, durability, bending stiffness, shaft strength, and lower cost compared to the steel pile. Based on a foreign sea-crossing bridge project, this paper studies the piling construction technology under complicated ground condition and summarizes the experience on the hydraulic hammer for PHC pile construction, which may serve as a reference for PHC pile application in bridge engineering industry.

Abstract:Based on the construction of anchor socketed piles for the 450 000 t crude terminal of Daxie, we discuss series of construction methods and technology, containing the stabilization of anchor socketed piles, the protection of pile tips, the erection of the drilling platform and the construction of rock anchoring, etc., all of which provide references for similar projects.

Abstract:Based on experience of many years’ in-situ dredging management, the author presents several methods of improving dredging efficiency of cutter suction dredgers in terms of the thickness adjustment of the soil to be cut, the improvement of construction process and the proper layout of pipelines. It is proved by practice that by these methods, we can cut down the dredging cost, reduce the energy consumption and achieve good economic benefits.

Abstract:Based on the restoration and upgrading of berth No.9 of Merchants Port Company, this paper describes the repair reinforcement and anti-corrosion design ideas on high-pile wharf structure, and proposes the rehabilitation scheme for the eroded and damaged slab-beam structure, steel piles, as well as steel sheet piles, so as to provide reference for the repair of piled wharf.

Abstract:According to the standard when calculating the thickness of the concrete slab, the value is 400mm in the container yard in berth No. 6 & berth No.7 of Dayaowan port area of Dalian port. But in the practical project, it was only 200 mm. The reach stacker was not allowed to work here by the original design. However, the concrete slab was not damaged after a lengthy operation of the reach stacker virtually. Different pavement designs were compared by calculations and the conclusion was that the reason why the thickness of slab was overlarge was that the modulus of resilience of earth subgrade adopted under the rigid pavement was too small.