Abstract:As ports and harbours have been developing rapidly and riverside industrial zones booming in recent years alongside the Changjiang River in Jiangsu province, it is urgent to improve the existing navigable channels’ ability to handle traffic and adopt severer standards for navigable waterways in the lower stretch of the Changjiang River downstream of Nanjing. The lower stretch of the river downstream of Nanjing could be divided into two parts at the place where Jiangyin bridge locates. This paper demonstrates appropriate design vessel-types for navigation, designed navigational standards and desired geometry and dimensions of channels along the river in connection with physical conditions and engineering restrictions, demands of ports and local economic development and the sailing requirements of larger ships. It proposes the principle on value-taking for desired geometry and dimensions of deepwater channels and further gives recommended values in the main sections. Based on the spatial and temporal changes in hydrographic conditions in the studied river stretch, the paper gives the limited drafts for design vessel-types with different allowable under-keel clearance at different water level guarantee rates, and shows that the seasonal changes in draft limitation of large-scaled vessels should be taken into account in ship operations.

Abstract:For the placing ship used in the waterway project, the setting of the best angle of the skateboard is an important index in the design process. A lot of construction is determined by the experience, but we can not judge the state under special conditions. After renovation of the “semi-submersible ship 1” , we get the friction coefficient range between the skateboard and interlocking pieces through many field tests, which is from 0.348 to 0.380. After setting the boundary conditions, we use the back calculation of friction coefficient and reverse engineering and obtain the skateboard best angle, i.e. 27.83° ~ 30.38°. Within this range, we can achieve the deck disposition of 2 m, realize smooth humping of skateboards when arranged in a single row of interlocking sheet, and obtain the best drum tension.

Abstract:Adopting the method of physical model, this paper studies the laws for the development of wave attenuation of the rectangular-pontoon floating breakwater in different plate widths, underwater penetrations and initial tensions of the chain. The result shows that the increase of the plate width and underwater penetration may reduce the transmission coefficient; While the increase of the initial tension of the chain can confine the motion of rectangular pontoon, and the transmission coefficient decreases.

Abstract:Based on the local movable bed conceptual flume tests, the longitudinal, transverse and vertical turbulent intensity distribution near the float cofferdam’s side during descending is presented using a Micro Acoustic-Doppler Velocimeter (MicroADV) to measure the instantaneous velocity. The turbulent width influenced by the changing of cofferdam subsidence depth, approaching flow velocity, upper flow depth is researched. The result shows that under the experimental conditions, the turbulent width influenced by the floating cofferdam subsidence depth is conspicuous, and by the approaching flow velocity, the upper flow depth is small relatively. In the experiment range, the relative turbulent width of D/B is increased with the floating cofferdam into relatively water depth Hc/H0 when the floating cofferdam acts alone. They are substantially linear relationship.

Abstract:A series of experimental investigations are carried out to study the regular wave and irregular wave acting on the wave transmission and silt deposition of a new-type hollow-block breakwater. At the same time, by comparing wave transmission coefficient of two kinds of hollow-block breakwater which have different hollow rates and solid breakwaters, we can get statistical analysis results of the experiment data. It shows that when choosing the appropriate hollow rate, hollow-block breakwater can also reach the almost same wave transmission coefficient of solid breakwater, and can achieve a certain effect on promoting the deposition, which means that the method of selecting hollow block as the structure of submerged breakwater is reasonable and effective.

Abstract:From idea of destroying water particles’ trajectory of waves, this paper proposes a kind of permeable breakwater of layer upright wave board with holes. Focusing on the wave board layout and wave elements, we study the breakwater wave dissipation performance and its variation based on the physical model test. The test results show that the structure has good wave dissipation performance for the long wave, especially for big-wave deep waters. It is of great significance to promote the breakwater from the temporary breakwater measures into permanent structures.

Abstract:At present, value-taking of existing models of ship domain depends on the measured data or experimental data and it is lack of theory about quantitative study. According to the channel condition and ship characteristics of the lower Yangtze River, based on the concept of stopping sight distance to traffic engineering, we propose the concept of stopping sight distance to waterway engineering, analyze the braking accelerations of ship, and discuss the value of major axis about ship domain. The result indicates that that ship domain to waterway engineering is composed of reaction distance, breaking distance and safe distance. When the braking acceleration of the ship behind is three or four times as much as the ship ahead, the value of major axis about ship domain is 2.9 to 3.8 times of the ship length. The results is basically anastigmatic with the recommended values.

Abstract:The permeable breakwater with wave baffle can provide moderate sea for berthing by weakening the wave energy. Hydrodynamic property of flow closed to the structure is strongly affected for the resistence produced by the immersed pile and wave baffle. To study the affected hydrodynamic property of flow by wave panel in two-dimensional tidal numerical model, the wave panel is generalized by the method of discharge-equivalent and resistance-equivalent respectively, which equals approximately the retaining effect caused by wave panel to similar effect caused by adding depth or adding roughness. The results show that both methods can simulate the waterresistance effect of wave panel, and the simulation results of resistance-equivalent method is more consistent with practical rules.

Abstract:Yield stress and plastic viscosity are two basic physical parameters characterizing the rheology of fresh SCC concrete. The yield stress and plastic viscosity of different fresh concrete are measured by ConTec Viscometer. The influence of different mineral admixtures on the rheological parameters and slump flow is summarized and the slump flows of fresh concrete in relation to rheological parameters are obtained, which provide theoretical foundations for SCC design and construction in harbor engineering.

Abstract:As the lower permeability of the cut-off wall, the stress field and the seepage field of the slope would change after the cut-off wall is built. And the affect of the cut-off wall on the slope stability exists definitely. In order to analyze the mechanism of concrete cut-off wall working on the stability of the earth-rock dam, the strength reduction finite element method is adopted, in accordance with the ABAQUS. Besides, the difference and validity of the evaluating methods are analyzed by comparing to the three kinds of evaluating standard such as calculation, displacement and plastic through areas. The result reveals that the stability safety factor of the downstream slope increases while the upstream slope decreases after building a cut-off wall.

Abstract:In the research on the beam field of steam curing system, based on the calculation, scientific experiments and theory concerning the aggregate temperature control system of concrete mixing station, water temperature control system and box girder system consisting of three parts, we determine the overall system energy consumption and steam supply steam curing system, establish an economic reasonable and scientific steam curing system, and realize the automatic control of box girder.

Abstract:The corrosion rate of reinforcement, reliability indices of bearing capacity, longitudinal crack width and rigidity degeneration factors are analyzed by probabilistic methods provided that structure satisfied the minimum requirements of durability. The results show that the values of performance parameters reduce with the working life of structure. The conclusions provide bases to develop rational durability limit states and design methods.

Abstract:With the completion and run of the Three Gorges Project, the change of hydrological conditions for wharf operation and enlargement of ships in Chongqing put forward higher requirements to mooring facilities attached to the pontoon for the sloping wharf. In order to ensure the safety of the port and eliminate security risks of existing mooring facilities attached to the pontoon, we propose a calculation method for the force on mooring facilities attached to the pontoon for the sloping wharf considering the elasticity and geometric characteristics of catenary for the anchor chain and rope, the impact of the part lying in the river bed or bank slope and multiple anchor chains and ropes working together in different directions. Programming calculation based on the practical project using Matlab proves that the calculation result is in accord with the empirical rules and Optimoor, thus it verifies the practicality and reliability of the method.

Abstract:Based on the off-shore wharf engineering of the Zhongke Refinery & Petrochemical Company, the uplift wave-pressure and wave-force on pier on piles are researched by wave physical model tests. Firstly, the process and distribution of wave pressure on the undersurface of pier are analyzed under different conditions of relative ultrahigh (height between pier and water surface), the two different types of pressure (pressure of impact and pressure of wave) are discussed, and the relationship between the relative synchronous pressure on the undersurface of pier and relative ultrahigh is proposed. Secondly, the process of uplift wave force on pier is analyzed under different conditions of relative ultrahigh, and is compared with relative pressure. At last, the result of different computing methods of relative uplift wave force on pier is compared with the result of physical model test. The research provides reference about uplift wave force on pier for other off-shore wharf engineering.

Abstract:The west breakwater behind Lianyungang Qitai port’s 100 000-ton bulk berth is formed on the basis of the original breakwater by blasting riprap construction process. Restricted by the formation conditions, the lower part of the breakwater is the silt layer which needs to be reinforced. Based on the comparative analysis of different reinforcement processing programs, we determine the final scheme which can not only reduce the project investment, but also meet the requirements of both construction and stability during construction.

Abstract:This paper analyzes the operation process of ship’s entering and leaving port through singlefairway in coastal container terminals and puts forward that the idea of improving the fairway throughput capacity by building anchorages when channel resources are limited. Moreover, a simulation model of ship navigation operation system is built in coastal container terminals considering the inner harbor anchorage. The results show that the number of anchorage and fairway capacity is correlated with an extreme of inner anchorage. Otherwise, it is available to increase the fairway throughput capacity by constructing anchorage in harbor. However, fairway throughput capacity no longer increases when the number of anchorage in harbor exceeds the extreme value. The extreme value could be regarded as the reference number of the anchorage in harbor.

Abstract:To improve allocation effectiveness and optimize efficiency of the berth and quay-crane in container terminal, a multi-objective berth and quay-crane allocation mode is established, so as to minimize the transportation distance of container truck and stay time of ships in terminal, and the Chaos Cloud Particle Swarm Optimization (CCPSO) algorithm is used to solve the new model. The feasible-integer processing module for particles is designed, and embedded in the CCPSO algorithm. Devising the rules of particles encoding and calculation method of the historical extremum and the global extremum of particles, a new multi-objective berth and quay-crane allocation mode optimized by the CCPSO algorithm is proposed. Numerical example result shows that the proposed model and algorithm has certain the practicability and effectiveness.

Abstract:Based on the object-oriented modeling method, this paper studies coal wharf production system, and establishes a work plan deduction platform for wharf production planning using the system simulation software Simio. This platform, which is based on the wharf production planning and the real-time production data at the start moment of that plan, employs a friendly 3D animation form to dynamically deduce the operational process during the plan cycle, assists wharf production planner to analyze and evaluate the rationality of the proposed production planning, tries to find out the possible problems during the execute process and optimize it. Application shows that the deduction technology can be used to supply scientific help and support for wharf production planning making and has a widespread prospects for project practice.

Abstract:This paper analyzes comparatively the domestic and international typical inland waterway’s characteristics of development stage and each stage’s features on waterway engineering, management techniques and waterways demand, identifies the similarities and differences of development stages among Chinese inland waterways and international typical inland waterways, points out that the differences are mainly due to the development of socio-economic backgrounds, the river natural conditions, management idea and channel positioning in comprehensive transportation system, and proposes that future development of Chinese inland waterways needs to focus on “four-adaptability” thesis.

Abstract:The impact of the Yangtze River backwater on the water surface slope of the Tuojiang river estuary is analyzed by flood levels below the Liutanba dam, flood levels of the Tuojiang river estuary and flood peak discharges of the Lijiawan hydrological station. The Longtouguan bridge once-every-three-years flood levels affected and non-affected by the Yangtze River backwater are calculated using corresponding stagedischarge relationship curves below the Liutanba dam and water surface slopes. The two cases are simulated by 2D hydrodynamic numerical model SMS to identify the navigational clearance of the Longtouguan bridge on the Tuojiang river effected by the Yangtze River backwater.

Abstract:Based on the natural condition of Yuxikou channel upper segment, this article proposes the feasibility of opening public waterway and scheme of the channel by analyzing the riverbed evolvement and verification of waterway scale to provide technical supports for subsequent opening project. The results show that the Yuxikou channel upper segment has the condition of opening a public waterway. However, the opening of channel will result in a change of navigation environment in Wuhu Yangtze River bridge area, so the feasibility shall be verified by the monographic research on the navigational safety. The maintenance dimension of Yuxikou channel upper segment can be decided referring to the lower segment when opening.

Abstract:Penetrating frame groups in the Yangtze River renovation work is characterized by deceleration, erosion protection and deposit-promoting. Under the limited depositing-promoting condition with the clean water in the operation of water conservancy in the Three Gorges Project, the protective effect of frame groups in beach protection edge is significant. But people are still lack of the knowledge in the mechanism of action of the penetrating frame groups, especially in the hydraulic characteristics of penetrating frame groups in the renovation project. This paper studies the relationship between the deceleration rate of the penetrating frame groups and display height, porosity and other factors via flume experiments, and analyzes the decelerating effects of the inside and tail parts of the penetrating frame groups. The results can provide technical support to the structural design of beach protection edge.

Abstract:Based on the hydrologic and topographic data of Guichi river reach from the 1960’s, we analyze the river regime characteristics and evolution tendency. To counter the problems of Guichi channel and in view of the needs of economic development alongside, we probe into the regulation measures, serving as reference for the systematic regulation of Guichi channel to be carried out.

Abstract:There are more than navigation-obstructing rapids within the 100 meters scope of the upper Yangtze River. Although rapids reaches are not the most navigation-obstructing ones, reaches with rapids usually tend to be the bottle neck or control reach. In the recent years, regulations have been carried out to many rapids on the upper Yangtze River and remarkable achievements have been achieved. This paper summarizes the navigationobstructing features and regulation ideas for typical rapids, hoping to provide reference for rapids regulation in mountainous rivers.

Abstract:Angu hydroelectric project gains hydraulic head with damming, and applies long tail channels to further increase hydraulic head, which also consider navigation. Utilizing the method of mathematical modeling, this paper carries out the research on technical problems such as increasing hydraulic head and hydraulic navigation condition, etc. According to the relationship between the unsteady flow tailrace water flow movement rule, tailrace hydraulic requirements, wave height, gradient, flow velocity caused by changing load on power plant units and unit opening and closing time, flow rate, this paper puts forward the improving measures, which may serve as reference for relevant professional design.

Abstract:A physical model on Jiaogang ship lock is set up, and the force of sluice gate hoist is studied by the model. The results show that the upper and down sluice gate can be opened in the same time in the following conditions: 1) The original tide range is less than 0.39 m when upstream water stage is 3.71 m; 2) The original tide range is from -0.34 m to 0.38 m when the upstream water stage is 1.64 m; 3) The original tide range is from -0.37 m to 0.43 m when the upstream water stage is 0.96 m. The force variation law of sluice gate hoist provides reference for the similar study.

Abstract:The floor, which belongs to the typical space force structure, is the most complex part of the lock head. At present, the elasticity beam method is still the main method in the code for the internal force calculation of the lock head floor. Being the plane calculation theory, this method replaces the elastoplastic with elastic, so it can be optimized. According to the shiplock project in the soil base, using the finite element software ANSYS, nonlinear finite element analysis of three dimensional based on Drucker-Prager criterion, we analyze the lock head floor of shiplock based on the elastoplastic model, compare it with the elasticity beam and elasticity finite element method, and analyze the applicable conditions of various methods, to provide reference for similar shiplocks’ engineering.

Abstract:Combining with Lishui Qingshan navigation-power junction’s layout in Hunan province, we study the key technology of navigation-power junction’s layout, waterway regulation and navigable flow condition by 1∶100 physical model test, analyze the characteristics of flow on left braided and right braided, and compare the layout of the left braided lock scheme and right braided lock scheme on navigation condition. Then we put forward reasonable layout scheme and regulation scheme and summarize the characteristics of navigation-power junction’s layout on the bending braided river, which may serve as reference for similar projects.

Abstract:To provide more accurate water depth prediction data for the terminal users of the Yangtze electronic navigational chart, this paper discusses the implementation procedure and practice of water level shortterm forecasting method based on the statistics and using the regression analysis method by taking the Yangtze Jianli gauging station for example, and has achieved satisfactory results.

Abstract:The structural calculation of high pile wharf could starts with the upper structure calculation by fixing the pile at a certain depth, and is followed by the analysis of pile-soil interaction by applying the calculation of internal force as a load to the pile. In theory, the most reasonable location for the embedded point can be identified under the condition that the horizontal displacement of pile top equals before and after simplification, but in practice it is difficult to achieve. Combining with the data of the field loading test, this paper conducts an extended analysis of the embedding characteristics of the super-long piles under the horizontal load and puts forward the experience formula of the embedded depth which changes with load. Calculation results show that the effect is satisfactory.

Abstract:In order to study the numerical simulation techniques and vertical capacity characteristics of large- diameter PHC pipe pile, based on high-piled wharf of Zhuhai Gaolan port, we conduct the numerical simulation on large-diameter PHC pipe piles of the wharf by ABAQUS, the result of which is validated by comparing with that by the field test. Then we study the vertical compression Q-S curves of PHC pile through changing the parameters of pile diameter, pile length, soil of pile shaft and pile toe etc. The results show that the displacement value of numerical simulation is about 2% to 20% smaller than that of the field test in the loading process, and the length of pile which is larger than 50 m belongs to super long pile.

Abstract:Consolidation settlement and slope stabilization are major concerns during construction of cofferdam on soft soil with plastic drainage plate and sand bedding. PLAXIS is used to simulate the layered buried progress of some cofferdam to analyze deformation, excess pore pressure dissipation and stabilization. Then the effects of bounds, loading scheme and reinforcement on results are concluded by contrasting.

Abstract:Stipulations in Technical Specification for Vacuum Preloading Technique to Improve Soft Soils (JTS 147—2009) concerning the time of heaped load of vacuum combined surcharge preloading, the layout, flow capacity and type of the filter tube, settlement calculation, as well as the standard of detection and unloading are relatively vague. Based on previous experience in the design and comparing with relevant specifications, we carry out the computational analysis about all the questions above and propose recommendations. It is suggested to determine the time of unloading based on the test data.

Abstract:Based on the direct shear test theory, mechanical properties of steel and sandstone mixed with mudstone interface are studied by experiments. In the tests, steel plate is made from Q235 steel, soil materials of sandstone mixed with mudstone is composed of weak weathered sandstone and mudstone after crushing, soil material weights ratio of 8∶2 prepared by sandstone and mudstone with 5 different particle grading curves. The tests results show that the shear stress-displacement curve of steel and sandstone mixed with mudstone interface can be used by hyperbolic model fitting; shear strength can be described by the Mohr-Coulomb strength criterion; shear strength cohesion value decreases and then increases as a parabola with increase of the characteristics of soil particle size d10, d30, d50, d60, d90; friction angle values increase and then decrease as a parabola with increase of the characteristics of soil particle size d10, d30, d50, d60, d90; relations between cohesion and friction angle versus coefficient of uniformity and curvature coefficient are not obvious.

Abstract:This paper introduces the protection technology of breakwater head under construction period for Adipala Power Plant, Central Java, Indonesia. Based on the analysis of the hydrologic characteristics of the open environment in the Indian Ocean, this paper describes the interaction of breakwater shape and hydrologic characteristics on the plan of breakwater head protection, discusses the effective mode of breakwater head protection mode under high frequency and strong wave in the Indian Ocean, which may serve as reference for similar projects.

Abstract:Taking the cast-in-situ bored pile engineering of the wharf in Tianjin Nangang industrial area for example, we analyze the construction technology of inshore cast-in-situ bored pile of early-stage land reclamation, discuss the difficulty and key control point of cast-in-situ bored pile, and summarizes the achievement of quality control in the process of construction, so as to accumulate experience for the construction of cast-in-situ bored pile of similar projects.