Abstract:Through analyzing the hydrodynamic sediment conditions, remote sensing and seabed evolution,mathematical models of tidal current and sediment, wave models of SWAN, mild-slope equation and Boussinesq equation, physical model test of erosion by tidal current and wave, calculation of sedimentation and calculation of sudden sedimentation, etc., we studied the hydrodynamic sediment problems in the development of deepwater port in radial sandbanks, Rudong county, Jiangsu province. The research results show that the development of deepwater port in radial sandbanks is feasible with necessary technical measures taken.

Abstract:Considering the excellent optimization toolbox in MATLAB, this paper combines the goodattributes quasi-Newton method and the simplex method in MATLAB toolbox with the popular bishop method to achieve the min safety factor and conducts further a comparison in some terms, hoping to find the real minimum safety factor. Considering the important role that the original value plays, we adopt some reasonable methods.

Abstract:Through flume tests of uniform current and limited depth, this paper studies the influence of different cylinder pile clusters on the circumfluence. By contrast analysis of several groups of experimental data, we achieved the laws including the influence of different cylinder pile clusters on the uniform flow, the influential scope of different cylinder clusters on the flow filed, the difference of the influential feature and degree from different cylinder pile clusters on the same flow, the influential scope of different cylinder pile clusters on the flow field, the influences of the flow-obstructing ratio, the bents’arrangement and cluster length on the flow field, the reaction of flow with different velocity on the cylinder pile clusters, as well as the variation of flow velocity on the transverse section, etc. It is found that the drag of cylinder pile cluster is one but not the only one factor affecting the water flow, the arranging formats and up-flow angles of cylinder pile cluster have different influences on the variation of flow velocity, and the back is greater than the front factor.

Abstract:In order to clarify the mechanical properties of the double-row anti-slide piles with top rigid connections, we established two models with and without a beam on the pile top respectively to compare the stress and deformation characteristics under the same condition, and discussed the loading mechanism of the spatial structure composed of piles and beams, which was verified from the angle of structural mechanics. The study shows that the pile’s maximum shear and moment both exist at the sliding surface; The maximum shear and moment of piles with a beam is smaller than those without beams. The anti-bending moments on the piles’tops are equal. The piles with a beam can reduce top’s displacement, shear and moment of pile commitment by providing anti-bending moment, increase the inertia of the anti-slide structures, and improve the anti-sliding force.

Abstract:For solving the problem of so much qualitative indicator and incomplete data in post-evaluation of water transport infrastructure project, a grey and fuzzy model is proposed. The grey assessment is used to design the matrix, and then the risk of the project could be computed by fuzzy comprehensive assessment. The model has been successfully applied to the post evaluation of Huai’an tripe ship lock project, which indicates that the model can reflect the degree of success objectively and the evaluation result is more scientific and more reasonable.

Abstract:It is popular that many high-piled wharves are damaged by overloading of the horizontal,especially for the wharves which have been used for a long period. The main representation is the damage of forked piles which are mainly used for supplying the horizontal force. Establishing a finite element numerical model, we got the worst force scenarios of the forked piles by the perpendicular and sensitivity analysis. Two methods of forked piles reinforcement, pile-cap reinforcement and pile reinforcement, are introduced respectively.

Abstract:The grain size and hydraulic characteristics of sediments at Xuwei area of Lianyungang port are studied and compared with those in the main harbor area of Lianyungang port, Tianjin port, and Huanghua port,etc., through which the difference of the grain size and sediments characteristics at different beaches are studied. It is concluded that the cohesiveness of sediments affects the hydraulic characteristics and the hydraulic characteristics determines the beach type. Suggestions on the classification of beach type areproposed, based on which, the beach type of Xuwei area is defined.

Abstract:The deepwater offloading buoy system has relatively small displacement and inertia, so that the mass, damping, and stiffness of the mooring lines have a great impact on the buoy’s dynamic response, thus the accurate coupled analysis of the dynamic response on buoy and its mooring system is particularly important.Applying the boundary element method to calculate hydrodynamic forces of buoy, results in frequency domain can be transformed into the time domain by fast Fourier transform. Based on the total Lagrange formulation and the two-node isoparametric cable element, this paper applies the geometric nonlinear finite element method and Newmark method to calculate tensions in mooring lines. Forth order Runge-Kutta integration scheme is applied to calculate coupled motion equations of buoy and mooring lines in time domain, then the motion response of buoy and tensions in mooring lines can be obtained.

Abstract:This paper analyzes the status and function evolution of ports, describes the international development of port planning, and points out main problems in China’s port planning. Current hot issues for port planning are analyzed and measures and suggestions are proposed.

Abstract:With the development of modernized port and large-scale ships, the handling efficiency of coastal container terminal is increased rapidly, which has a great impact on the channel utilization ratio. Therefore,the relationship between port handling efficiency and channel utilization ratio is studied emphatically using system simulation technology. The results show that increasing the handling efficiency appropriately can increase the utilization; While improving the handling efficiency to increase the port capacity, we must consider the impact on the channel utilization, otherwise it will result in high channel utilization, channel congestion and reduce the level of channel services. For the scale of berths in the instance, the proposed handling efficiency rate should not exceed 13%.

Abstract:According to the historical data of Tianjin port cargo throughput, some prediction models of cargo throughput in this port are established by means of regression prediction model, logistic model and combined model. Comparing the mean relative errors among the three models, it is shown that the smallest mean relative error of the combined model is the least. So, by the combined forecasting method for port’s throughput prediction, we can decrease the error and improve the forecasting accuracy.

Abstract:Predicting of port container throughput is characterized by a series of nonlinear factors interaction, which form a high-order, complicated time-varying system. In view of the thought mentioned above, a container throughput predicting method based on SD was proposed. In the model, five subsystems, i.e., environment system, economy system, harbor system, import and export trade system and the collecting & distributing system were included to consider the nonlinear interactions among relative factors. Using this model, the container throughputs from year 2000 to 2020 of Ningbo-Zhoushan port were predicted and the simulated and verified results suggest the model to be effective and feasible.

Abstract:The linear regression method and support vector machine method are used respectively to make a prediction on the cargo throughput of Lianyungang port. Based on the two methods, an optimal linear combined forecasting model is built. By contrasting the results of three methods, it indicates that combined forecasting method is more accurate and steady-going. In the end, the final prediction of cargo throughput of Lianyungang port from year 2010 to 2015 is given according to the combined forecasting model.

Abstract:Yangshan deepwater port was formed by blocking up the branched channels and connecting the inlets. The change in boundary conditions influenced the flow structure and sediment movement, which in turn affected the topographic evolution. Applying the“ measuring suspended sediment concentration based on the ADCP backscatter”technology, this article presents the overall character of the suspended sediment movement. Analysis results show that the sediment concentration distribution of Yangshan port has a slight difference between the flood and ebb. The sediment carrying capacity of flood in the main channel is greater than that of the ebb.However, it has a contrary character in the north and south inlets. Huge sediment runoff goes through the Yangshan port. The underwater topography scours slightly in the spring tide, and keeps the balance between erosion and deposition in the moderate tide, and deposits in the neap tide. In relative terms, the power of the flood plays a leading role in the underwater topographic evolution of the Yangshan port. In other words, the sediment carried by the flood from the eastern will deposit in the southwest area of the port, and the neap tide contributes the main effect. Meanwhile, the three inlets of the north and south island chain play an important role in separating sediment from the main channel, and reducing the deposition.

Abstract:The wharf engineering scheme selection depends largely on the height of engineering cost besides the structure. According to the natural conditions of Zhangzhou port Gulei port area including the topography, geology and hydrology, etc., and considering the port planning, this paper presents two schemes for the hydraulic structures of No.2 chemical wharf engineering in Zhangzhou port Gulei port area, and carries out the technical analysis and economic comparison, so as to determine the recommended scheme.

Abstract:Shanghai port Luojing harbor phase II ore terminal locates at Luojing district of Baoshan in the south coast of the Yangtze estuary. It is a specialized 200 000 DWT bulk cargo terminal. Considering the geologic,topographic, technological and loading conditions, we may adopt RC piles, PHC pipe piles and steel pipe piles for the terminal. According to the section design, we make comparisons on the technology, economy, construction, as well as the impact on the environment. It is concluded that the PHC pile is the type with the optimum technology,the least cost and easy installation under the loading condition of specialized bulk cargo terminals. Moreover, this type of pile has the least impact on the environment.

Abstract:In the existing code, the flood frequency standard is used to determine the port designed high water stage. The mountain river has the characteristics of short lasting time for the flood course, high perk value and sharp -thin peak shape, and the flow pattern is rather bad. The wharf’s designed high stage, which is determined by the flood frequency standard, greatly exceeds the prohibited navigable stage in all place, and it is difficult to meet the demand for ships’entering, leaving and berthing at the port. The top altitudes of the port structures determined according to the designed stage increases the cost, but the increased working time is only about 3 days. Through analyzing the model test results of the typical engineering and the hydrograph statistics, we discuss the feasibility and rationality of adopting the guarantee of navigation duration in the high level to determine the port designed high stage.

Abstract:Landlord Port Pattern with both management and financing functions is being applied widely bydomestic and foreign harbors. However, there are obvious differences between them because of their different backgrounds. This article summarizes the centerpiece of Landlord Port Pattern based on its connotation. Two typical operation patterns of Rotterdam port and Wenzhou port Yueqing bay district are taken here for instances to analyze differentiations between them and suggestions are put forward to the practice of Landlord Port Pattern in domestic harbors.

Abstract:Based on the analysis of the incoming water and sediment, tide and tidal current characteristics in the Lingdingyang estuary, and combining with four times topographic survey data after phase Ⅲproject of Lingding channel, this paper analyzes the spatial-temporal variation of channel’s siltation amount and slope stability. The results shows that after the transfixion of the 15.5 m dredged channel in Lingdingyang bay, and the flow and sediment process between January 2008 and January 2009 (the channel was not dredged during this period) , the channel’s main tendency was silting-up, but the sedimentation amount was not increased comparing with the previous project (phaseⅠand Ⅱ). The result presents a technical reference for further widening and deepening of the channel in phase Ⅲproject.

Abstract:There’re more than 120 cliffs of different scales along the channel from Chenglingji cliff to the Yangtze estuary which is about 1 200 km long. Since the Yangtze River develops along the fault zone, on which the cliffs grow, it is impossible for the Yangtze River to swing freely. The riverbed is usually narrow at the protruding site of the cliff and turns wide when passing the protruding head, thus it forms a lotus-root shaped one. According to historical records, these hills and cliffs have long been along the river, and the river bank has always been stable, which determines the general flow regime of the Yangtze River. However, since the cliffs locate at different sites of different geologic structures, the impact of them on the river evolution is different. This study may serve as a reference for the systematic research on the functioning mechanism of the cliffs downstream the Yangtze River.

Abstract:Based on the analysis of the ship types and channel conditions of Chuanjiang river and the Three Gorges reservoir area, it is proved that the implementation of the Three Gorges reservoir routing system is feasible.According to the check result of the maintenance scale of the channel, we know that the current maintenance dimensions can basically meet the requirement of ships sailing on the Chuanjiang river. Other matters concerning navigation and arrangement of navigation marks are also discussed.

Abstract:In the course of the optimal selection of the waterway designs, many influencing factors are involved. In order to evaluate the advantage and disadvantage of the waterway designs, the method of AHP and Fuzzy are applied to establish an AHP-Fuzzy comprehensive assessment based on the ship maneuvering simulator. The assessment for the waterway designs optimization of Tianjin port industry area is carried out. The study of the assessment model and its application may offer a new approach for the scheme selection in the waterway design.

Abstract:Changzhou complex and lock have promoted effectively the transport capacity of the Xijiang waterway. However, with the increase of traffic, the existing navigation lock facilities can not meet the traffic demand. In order to ease the congestion and delay of the navigation locks, we analyzed the lock’s traffic in recent years, and forecast its capacities from 2010 to 2015 based on a new analytical model for the average lockage tonnage. Some suggestions were put forward to improve the existing lock’s capacity, including the lock management mode, standardization and enlargement of vessels, lock scheduling, engineering measurement, etc.

Abstract:Based on the analysis of the bed evolution of Luxikou waterway on middle reaches of the Yangtze River, we studied the implementation possibility and engineering effect of Zhigang entrance dredge-cut engineering through the model test. The results show that the dredge-cut project designed in Zhigang entrance can’t prevent the obstruction to navigation in the low water period, and it is more difficult to attain the aim of changing it to the main channel.

Abstract:With the changes of upstream runoff amount, there are many different opening modes of the release sluices of a hydro-junction within a hydrologic year, which cause different flow fields and affect the flow condition in the entrance area of the navigation lock. Therefore, we studied the research data on the opening modes of the release sluice, which are considered as the successful experience under different boundary conditions, so as to explore the rule and trend of the opening modes of sluice gates and propose some suggestions in principle.

Abstract:Based on Xinzheng, Jinxi and Fengyichang projects on the Jialing river, we studied the maximum navigable discharge of navigation -power junction on the middle reaches of Jialing river by the hydraulic model test and ship-model test. The channel navigation grading of the middle reaches of Jialing river is class Ⅳ, so the flood frequency of the maximum navigable discharge is 33.3% , but the Jialing river is a mountainous river, the flood frequency of the maximum navigable discharge is less than 10%. Model test results indicate that the maximum navigable discharge of Xinzheng, Jinxi and Fengyichang are 8 000 m3/s respectively,which may serve as a reference for the operation of the navigation-power junction.

Abstract:In concrete construction, particularly large concrete pouring process, cracking is a common problem, so it is very important to seek a way of reducing and avoiding the cracks, so as to reduce the bad effect of cracks on the project quality. Combining the actual case, this paper carried out a comprehensive analysis of the causes of cracks on the bevel edge of chamber wall of the third-line Shaobo lock, and put forward the preventive measures from the design, purchase and use of materials and construction technology, etc., which have been proved feasible by the practice.

Abstract:A microscopic test study was carried out by taking the mud soil of Shenzhen Dachanwan as the sample. The study reveals that the dredged mud soil is obviously flocculent structure with a high void ratio and multiple holes, as well as an obvious water film of strong bound water at the particle boundary; Large aperture holes of mud after foundation dispose decrease obviously, and the small holes are also jammed, forming a more compact structure; The mud holes are of a great amount and rather big, resulting in a high probability of dewatering passageway connecting by holes. It is indicated from the permeation test that the osmotic coefficients are in the magnitude of 10-7~10-8 and with a low osmotic coefficient. So, if the continuous pores are thought to be the seepage passageway, there is a natural contradiction between the high porosity ratio and low osmotic coefficient; Holes in mud are in the majority of 5 滋m and below, especially 2 滋m and below. Water in holes is in the majority of weak bound water and capillary water; Osmotic coefficients of mud soil under electric field are changing along with voltage; Osmotic coefficients after foundation dispose are less than that before foundation dispose. Furthermore, the osmotic coefficients of mud under the control of effective aperture and bound water content are checked.

Abstract:Using Visual LISP language, we conducted the re-development of AutoCAD, and put forward a new method for the data collection, calculation and automatic graphing of lab soil test. The programming skills including the technical characteristics of the program, the algorithm, and float menu, etc. have distinct innovations and a broad application prospect. The program has been used in engineering and has filled the blank in the domain of our country.

Abstract:The bridge axis of Donghai bridge is 31 km and PHC piles are used in the pile foundation of offshore piers. Because this project is far away from the seashore without shield, the construct condition is hostile with strong wind, high wave and rapid flow. Moreover, the geologic structure there is complicated and the salt content of seawater is high, and there is only 174 operational days within a year. Therefore, the key point for the construction of this project is the construction of the large-diameter PHC pile which is adaptable to the natural conditions of such sea area. This paper introduces some key construction techniques applied to PHC piles for offshore piers of Donghai bridge, such as selection of pile type, anti-corrosion technology, selection of pile shoe, settleability analysis, water-hammer response and countermeasures to wave-current effect.

Abstract:The test for pile foundation bearing capacity is the critical control point of each construction project. To ensure the testing accuracy and validity for the reliability and the safety of the pile foundation, the bearing capacity must be considered. Through the practical example of Angola LNG project, the thesis introduces a non-traditional test method for pile foundation bearing capacity, the application for the self-balanced bearing capacity.

Abstract:The diaphragm wall was originally used in the hydraulic engineering, and later extended to other high-rise building foundation and underground Metro, with the new equipment and construction process of continuous innovation. In recent years, several large-scale suspension bridges adopted diaphragm walls as the supports. Combing with the practice of several large suspension bridge engineering, this paper describes the construction technology of the diaphragm wall and based on the anchorage underground continuous wall construction techniques are introduced and analyzed, and from the perspective of its technology and management quality control measures.