Abstract:Tongzhou shoal and Baimao shoal are two major obstacle shoals of the 12.5 m deep water channel extending up to Nanjing in the Yangtze River. The engineering river reach is influenced by both river discharge and tide, hydrodynamics is complicated and river bed is active in siltation and erosion. Two-dimensional numerical tidal model is set up to study nonuniform nonequilibrium sediment movement in the three sand shoals (Fujiang shoal, Tongzhou shoal, Baimao shoal). Based on the study on the sediment carrying capacity formula and suspended and bed sediment exchange mode, the paper calibrates and verifies the model by measured hydrology and field bathymetry data. The model is applied to the 12.5m deep water channel phase I project to analyze the influence of regulation works and affords technical support for the engineering design.

Abstract:In view of two obstacle segments of navigation channel from Taicang to Nantong which were named TZS (Tong Zhou Shoal) Waterway and BMS (Bai Mao Shoal) Waterway, the first phase project of 12.5 m deep-water navigation channel project was designed and now under buliding. The project would make 12.5 m deepwater channel extent from Taicang port to Nantong port. In order to test project effects, movable-bed physical model was designed to optimize layout of the project. TZS sub-project can make obvious effect to prevent shoal erosion, training dike and tooth groins could prevent washing back of left edge of TZS shoal and LSS (Lang Shan Shoal) shoal, erosion development process of scour channel between TZS and LSS could also be prevented. The navigation condition of deep water channel in the east LSS waterway could be improved. BMS sub-project can also make obvious effect to prevent shoal erosion, and change the backward trend of shoal caused by erosion. And also, small sand bar locating in south channel of BMS shoal which cause navigation obstruction was also significantly eroded, navigation condition of the inlet section of south channel of BMS shoal was also improved for the project. In conclusion, the project can achieve the goal of engineering construction.

Abstract:According to the wave data of 11 wave observation stations in Dalian sea area and nearby, the basic wave features of dominated wave directions, the strongest wave directions and their frequencies on different coastline segments are studied, and wave rose diagrams of 11 stations are drawn. Based on relevant literatures, the out-sea deepwater design wave characteristics on different coastline segments are analyzed, and the 50-year frequency wave heights and wave periods are presented. The results shows that the strongest wave direction in Dalian sea area in Bohai sea is of near-north, and that in Huanghai sea is of near-south.

Abstract:The characteristics of bed load motion is special, which makes the research on bed load transport one of the difficulties and focus in field of the River dynamics. Both Chinese and overseas scholars are very concerned about the study on bed load transport. The characteristic of the bed load movement is expounded succinctly in the article, and the role in riverbed deformation, sand wave, bending river evolution and the influence to the engineering of the bed load movement are discussed. In addition, the history and latest study development of the bed load on theoretical analysis, experimental research and prototype observation in natural river are discussed separately from three periods, comparative analysis about the bases of different theories, research methods and experimental observation techniques are also made in the article, and some suggestions are proposed. The broadening of research perspective and improvement on research method and observation instrument must be considered in deepening the research of bed load transport.

Abstract:The variation coefficient and its probability distribution of combined action and combined resistance are discussed based on the statistical results of calibration calculating for reliability index β by JC method to anti-sliding and anti-overturn stability of gravity wharf as well as some typical analyses by Monte-Carlo method. The result indicates that the probability distribution of combined action and combined resistance all conform approximately to the type of lognormal or normal and then the partial factor for combined resistance can be obtained and set by them, which may serve as reference for revision of the code. On the basis of this, we submit some revision suggestions on the partial factor and the adjustment factor for structure.

Abstract:This paper investigates the transmission of regular incident waves interacting with a long rectangular floating breakwater with four mooring lines connected. We conduct two-dimensional physical model tests to measure the wave transmission coefficients, and investigate the effects of the relative width (W/L), the relative wave height (H/d) and the relative draft (s/d) on the wave dissipation coefficients. We also define the parameter(W/L)as a standard to deal with this experimental data and fit the formula based on normalized profiles.

Abstract:Based on two typical cases, this paper discusses the interface roughness of concrete construction in harbor engineering which plays an important role in the stability of sliding resistance, expounds the necessity of accurate simulation of the interface roughness, and provides the practical simulation techniques, which may serve as reference for the engineering design and model test concerned.

Abstract:The paper sets an exceedance model and proposes the sampling principle for maintaining the independence of the sample. By fitness test, the sample is preferably fitted. Then the threshold is determined by the average number of occurrence every year and goodness of fit for GPD. The result of comparative analysis shows that the results of the GPD model and P-GP model is the same and approaches that of P-III distribution.

Abstract:The charge passed through concrete is a key parameter for durability analysis of concrete under chloride environment. In this paper, the effect of the water/binder ratio, the replacements of fly ash, slag and silica fume on the charge passed is investigated by analyzing the experiment data and those collected from literatures, so that a multi-factor model is developed. The statistical analysis of data from literature and experiment demonstrates the satisfying accuracy and applicability of the model. The service life of reinforced concrete is studied based on Fick's second law and the multi-factors model, the results show that the reduction of water/binder ratio, or adding the content of blending admixtures can effectively improve the concrete service life. The concrete structures adding slag result in better durability than fly ash. The durability of high performance concrete (HPC) with both of fly ash and slag is better than those with fly ash or slag only.

Abstract:The influential factors of partition coefficient of horizontal impact force on overhead vertical wharf are complicated, which contain bent frame number, bent frame spacing, impact position, wharf width, components size and so on. This paper mainly studies the influence of wharf width and pile diameter using Ansys finite element analysis. The results show that increasing wharf width is beneficial to evenly partition coefficient of horizontal impact force. Increasing pile diameter is harmful to even partition coefficient of horizontal impact force. In order to make the structure well-distributed stress, it can be appropriate to increase the wharf width and reduce the pile diameter. This paper also contains the sensitivity analysis between the factors.

Abstract:L-framed wharf is irregular in plan with uneven distributed mass and stiffness, and torsion effect shall be considered under the horizontal earthquake effects. Using the finite element analysis software SAP2000, and considering the horizontal earthquake induced response along two main axes direction and spindle oblique direction of the structure, this article analyzes the elastic response spectrum considering torsion-coupled effects of L-framed wharf in inland river. Based on the numerical calculation for the internal force response and displacement deformation of this arrangement wharf structure under seismic action, this paper makes the evaluation for the dynamic bearing behavior of the wharf structure, and finds out the structural weak position, serving as reference for the engineering structure design and optimization.

Abstract:Based on the analysis of the historical data of a coal wharf’s construction, we develop and compare different transforming and upgrading schemes, to satisfy the requirement of the systematic upgrading of facilities and ensure normal operation of the power plant. In view of the limited space for upgrading and necessity of matching joints between the new structures and the old ones, a non-standard design speed of conveyance belt is adopted which result in saving cost, reducing power consumption and stabilizing the operation in a safe manner if fitted with the basic conditions; And a deck structure supported on rake large-diameter socketed-in-rock tubular piles is adopted for the extended section of wharf, while a kind of creative structure with strut piers supported on rake socketed-in-rock tubular piles is used for the reinforced section, so as to reduce the settlement and minimize the influence on the original structures and operation on the wharf. This method of wharf upgrading may serve as referencefor other projects of the same nature in the future.

Abstract:Selecting a structural segment of high-pile wharf in Zhanjiang as the research data, we build a space finite element model by finite element software ANSYS. Considering four kinds of horizontal loading effects as controlled working conditions, we calculate and analyze the internal force of pier pile under different fork pile fastened angles, and discuss the influence of horizontal earthquake effect and ship load on the laying of fork pile fastened angle. The results indicate that: when the fastened angle is growing bigger, the lateral displacement and bending moment of such structure increase, but the longitudinal displacement and bending moment become smaller. The displacement and the bending moment get the maximum under the working condition of the longitudinal horizontal earthquake effect. When the effect of longitudinal and lateral controlled working conditions is considered, fork pile fastened angle 20° will be reasonable in the structural segment of such high-pile wharf.

Abstract:As the new terminal in Dongying is just 20km away from the tank farm, the ship pump head is not enough to overcome the frictional resistance, so the materials can’t be directly transported to the tank farm. After analysis and computation, we raise a proposal of installing a pump station on the terminal, so as to make good use of the space on the terminal platform. Furthermore, we carry out a water hammer analysis to test whether transient water hammer pressure exceeds the designed pressure of pipe, and adjust the proposal to decrease transient water hammer pressure if it is higher.

Abstract:The time for the impoundment of the Three Gorges reservoir is very short, and the scour and aggradations of the river bed are in continuous adjustment, all of which make both the inadaptability between navigable base level and navigable condition and the contradiction between available data and determining method for design water level more remarkable. Based on the hydrological data of year 1981—2002 before the reservoir, the corrections of the design water level are calculated by time division, the design water level calculated according to the observed dada after reservoir is revised, and the design water level of part hydrographic stations at the middle Yangtze River are determined. This paper compares the variation of the design water level before and after the reservoir, and analyzes the course of change.

Abstract:In order to shorten the filling and emptying time of Xingan shiplock and improve shiplock capacity, in accordance with the Design Code for Filling and Emptying System of Shiplocks and characteristics of Xingan shiplock, we determine the type of the filling and emptying system.By hydraulic calculations, we determine the key size and layout of the filling and emptying system of shiplock. Based on the comparison of the water efficiency, capacity, cost, etc., we determine the filling and emptying system reasonably.

Abstract:Silting is often the focus of attention for channel dredging. By superposing the different depth of trial excavation in the 300 000 DWT channel of Daxiaomen island harbor, Wenzhou port, we obtain the deposition rate and annual siltation volume, as well as the influence degree on channel siltation by typhoon and cold spell, which may serve as reference for related engineering design and research.

Abstract:RNG κ-ε and VOF models in FLUENT software are used to simulate the flow field in the vicinity of a submerged spur dike. The result shows that the flow speed in main field is increased as a result of restraining by spur dike and a moderate backflow region with lower speed behind the dike. Backwater occurs near the dike so that the water level before the dike is increased while decreases behind, and then recovers along the channel. The simulation result coincides with the experiment and field observation and the calculated speed is close to the test data, which means that the model presented can be applied to the engineering calculation related to spur dike.

Abstract:During the operation of the inshore channel, the channel sedimentation will happen due to moving of sand material under the effect of tide, wave and current. Thereby, the periodic maintenance upon the channel is required. However, the maintenance cost will be reduced once a reasonable channel layout and slope design is adopted. Based on the natural conditions and water level data of Ras Az Zawr port, Saudi Arabia, we analyze the trend of sedimentation of channel and the reason for it by theoretical analysis and numerical simulation. On that basis, we propose suggestions for the logical channel slope , which will cut down the maintenance cost of navigation channel. Based on the analysis of the mathematic parameter and verification of survey data during a period of operation, we know that the channel layout and slope design of Ras Az Zawr port is reasonable and acceptable.

Abstract:In recent years, the downstream of Ganjiang river is infected by the sand-excavation on the river channel. The river bed and water level decline obviously. The shape of river channel has changed. The waterway regulation parameters have been infected. Based on the analysis of hydraulic characteristics and waterway regulation parameters, this paper calculates the lowest navigable water level for the hydrology station of Zhangshu, Fengcheng, Shicha and Waizhou. The variation of regulation width is calculated and compared with designed results.

Abstract:The paper presents the finite element analysis on the stress distribution in lock wall subjected to an impact of ship with the maximum weight, impact angle and velocity. The results reveals that the C25 concrete traditionally used in lock wall can’t carry the tensile and compressive stress at collision. Based on the FEM analysis results, various strength indices of concrete in lock wall are correspondingly suggested. The field tests in actual engineering further verify the reliability of bond strength index between new and old concrete. These proposed indices provide reliable reference for the design and repair of ship lock structure.

Abstract:Aiming at the complex lock structure model and heavy workload, on the basis of the Vb language and Fortran language, we realize the lock parametric modeling and automatic subdivision, and develop the chamfer triangular gate lock structure optimization system using particle swarm optimization algorithm. Taking the minimum usage of concrete as the objective function, we verify the validity and practicability of the system optimization in the engineering project. The results may serve as reference for the lock structure design.

Abstract:With the rapid development of port information-based construction, and mature using of wireless sensor, wireless network, and video surveillance, it is feasible to construct dangerous goods monitoring and warning system combining port logistics hub dangerous goods operating features. On the basis of analyzing the function requirement of dangerous goods monitoring and warning system of port logistics hub, this paper proposes the five-storey system frame, i.e. information collection layer, information transmission layer, information management layer, support platform layer and information application layer. Meanwhile, this paper analyzes the key technology of information collection and processing, and prospects the follow-up research direction.

Abstract:It is the foundation for Changjiang waterway element information collecting and services to make data exchange protocol. According to the requirement of the Changjiang digital waterway planning, this paper puts forward the data exchange system, analyzes the technical requirement of current Changjiang waterway element information collecting and services, sets up the data exchange program, and establishes a test system for waterway element information collecting and service, to provide a technical support for the construction of digital waterway and intelligent channel.

Abstract:This paper summarizes four kinds of pile-rock interface models that are frequently used in FEM simulation for rock-socketed pile. An improved hyperbolic model of load-transfer for rock-socketed pile is proposed to resolve the problem of parameter selection based on the most common and effective hyperbolic model of load-transfer according to the elastic solution of thick-wall cylinder and the theoretical research about the shear strength of the discontinuities ordered roughness without filler (Patton(1966)). The “Load Transfer -FEM” named united model is put forward according to FRIC subroutine which applies the improved hyperbolic model of load-transfer on the strength of the ABAQUS (CAE). The bearing behavior and load transfer mechanism for rock-socketed pile reflected by the results from applying united model to analyze static loading test agree well with field measurements.

Abstract:In order to analyze the factors of settlement of soft foundation in marine reclamation land project, as a professional geotechnical engineering finite element software, the PLAXIS is used in this paper, and learn from Japan 's Kansai airport project experience data, soft soil creep model is used and consolidation settlement and pore pressure dissipation of the numerical analysis of the entire area is done. It also draw out the settlement and pore pressure results of different base period in figure comparative analysis, and the different depth of soil pore water pressure dissipation trends. In addition, this paper carries out the necessary sensitivity analysis and obtains the law of the main parameters in soft soil creep model on the results of settlement, and its corresponding results for marine reclamation land project to provide reference and guidance. Moreover, it is suggested that the empirical method of the creep index value has not been applied widely, further research needs to be done.

Abstract:Water pressure is an important load which influences the stress of sheet pile. The main factors influencing the distribution of foundation seepage water pressure include the water level on both sides of the sheet pile, the distribution and permeability of the foundation, the permeability of the soil under the bottom of the sheet pile, etc. Based on the engineering examples, we analyze the water pressure distribution works on sheet pile under different foundation conditions, to serve as reference for sheet pile design.

Abstract:Jiangsu Jingangwan international logistics park is constructed in Lianyungang coastal deep soft soil, “8 m high-strength overload preloading combined dynamic compaction” scheme is first used successfully on container yard B for soft foundation treatment, which broke through significantly the overloading prepressing height in the local area before. The engineering case not only serves successful experience for the high-strength soft foundation treatment in Lianyungang city, but also verifies the feasibility of the high- strength soft foundation treatment. It may serve as reference for the construction of port area on coastal soft soil ground.

Abstract:According to the immersed tunnel projects built at home and abroad, we summarize the popular sinking methods for immersed tubes. Based on the study about the construction process and technical measures of the popular methods, such as floating crane method, floating box method, SEP method and square barge method, we present the merits and faults, and give the applicability of each sinking method to provide a reference for the method choice, technical optimization and new technology research.

Abstract:This paper introduces the application and practice of self-propelled dredger without spoil hopper, self-propelled full-bottom dredger, double side barge unloading suction dredger and combined operation integrating barge equipped dredging process and rotary blowing filling process in the project of Tianjin port’s waterway maintenance and dredging. It is considered that the dredging blow-fill combination for the dredging projects is the future research direction of the front-edge dredging equipment.

Abstract:This article deals with the underwater pipeline laying methods and measures for pipe damaging and blocking with case study of phase I project of Lianyungang 300 000-ton channel dredging, for the purpose of minimizing the suspension of pipeline-failure-related work and speeding up the project progress.

Abstract:This paper discusses the construction technology of directional slip blasting compaction treatment for the foundation of suspended breakwater from the riprap loading of dike head, parameter selection of blasting compaction, circulation measurement control, as well as tamping compaction of both sides, which is under deep and thick silt ( > 28 m ) conditions of sea area. Monitoring through volume equilibrium method, settlement observation, and drilling exploration, the blasting compaction quality is guaranteed, and the engineering is characterized by short construction period, low cost and small settlement. Thus the technology is worthy of popularizing in similar engineering.

Abstract:Based on the application example of foundation bed blasting compaction on sandy weak ground of Yantai harbor phase Ⅲ project, this paper expounds the parameter design of foundation bed blasting compaction, construction technology of blasting compaction, environmental monitoring of blasting compaction, implementation effects, as well as construction experience, etc. , which may serve as reference for similar projects.

Abstract:This paper describes the closure segment construction on soft ground treated by explosive compaction. For different cross-section types, the paper presents three types of construction methods: the whole section to promote the law, both sides of the marching method and unilateral advancing method. As the technical points, closure segment position selection, determination of the length, with filling material specifications, and explosion parameters are described. In combination with the engineering practice, the paper introduces the application of the methods.