Abstract:The section of Yangtze River downstream Nanjing, where the 12.5 m deepwater channel phase I project is located, is a tidal reach, and ships with a tonnage over 50 000 need to pass in and out by tide. Based on the tidal characteristics of the engineering river reach, the duration by tidal current and the tide-bound water levels are analyzed under conditions of different guarantee rates of first and second tide saving time, from Tiansheng Harbor of Nantong to the Yangtze estuary. Furthermore, the guarantee rate for navigation of container ship, crude oil ship, bulk carriers of different tonnage, and the rationality of the navigation standard of phase I project are demonstrated.

Abstract:Local scour in Baimaosha channel project of the first phase of the Yangtze River deep water channel project from Nanjing areis studied by local normal model. The results show that: 1) S1 groyne, S2 groyne, S3 groyne and the head of south polder dike, etc. are positions prone to appear significant local scour in Baimaosha channel project, and thus need to focus on protection; 2) Optimization scheme is not only effective to prevent local scour, but also scientific and rational in layout design of flexible mattress, thus can meet the needs of engineering safety and conservation investment.

Abstract:In order to provide a basis for 12.5 m deepwater waterway regulation of Kou’an straight reach, considering development of port on both sides of the reach, we determined that the left flume of Manyusha shoal reach is 12.5 m deepwater waterway and the right flume is 10.5 m deepwater waterway based on the analysis of waterway conditions and evolution trend of Manyusha shoal reach, and verified the requirement of waterway arrangement under the influence of Taizhou highway bridge and waterway regulation engineering. The result indicates that the choice of 12.5 m deep-water route of Taizhou bridge left navigable sailing into the left slot is characterized by smooth transition route, thus it is a safer route layout; When the left navigable Hangkuan is insufficient, it is feasible to adopt the scheme of transiting from the right main navigable hole of Taizhou highway bridge to the left slot.

Abstract:Through the wave cross-section physical model test, the wave reflection coefficient and wave crest height of the open caisson structure under irregular wave action can be measured. Through the single factor analysis method, this paper mainly analyses the influence of different factors related to the permeable upper structure to the reflection coefficient based on the study on the basic structure of open caisson structure; and at the same time analyses the influence of factors to the wave crest height in the same way. Finally, it fits out formulas to compute the two physical quantities, proving the formula about wave crest height by theory and establishing the relationship between it and reflection coefficient. The test results may serve as reference for the engineering design.

Abstract:Based on the present study result about piled permeable breakwater’s efficiency judgment,and combining with the data from wave model experiment and theory calculation, this paper analyzes the present calculation formula, and sums up a new calculation formula, which is checked out by different wave factors and relative depths in water, and gets the elemental conclusion for the comparison and choice of the piled permeable breakwater structure.

Abstract:After the tide level predicting model is built with the harmonic analysis method, a method for fast solving the time of high and low water of the tide level predicting model is supplied with Newton iteration method.The time of high and low water is predicted with several different methods. The results show that Newton iteration method has several advantages, such as less calculation, faster converged speed, etc.

Abstract:Based on the analysis of spud loads under the combined action of wind, wave and current, this paper puts forward the method which combines programming calculations with finite element analysis on the spud dynamitic response in the wind, wave and current environment, i.e., gaining the spud loads under the combined action of wind, wave and current through programming calculation at first and then obtaining the dynamitic response of the spud by finite element analysis. The results from this method agrees well with the real case, so it may serve as reference for safe construction of cutter suction dredger.

Abstract:Reasonable allocation of empty containers can reduce the liner company’s operating costs and improve its market competitiveness. This paper analyzes the Chinese port and proposes a transit dispatching strategy in merging of cabins to deal with the allocation of empty transportation containers considering the transportation costs, handling costs, leasing costs and transporting constraints. The objective is to minimize transporting costs. This integer linear programming model allows transit of an empty container with the transport of heavy container under the premise. By solving the model we get a result better than the one obtained from that a traditional scheduling mode.In addition, we analyze the results and developed appropriate dispatching strategies. The model has a strong guiding significance for the empty container’s reposition.

Abstract:Water injection dredging (WID) has been widely used as a new dredging and leveling tools.Accurate calculation of pipe pressure loss and nozzle flow intensity is directly related to the type of ship pump selection and dredging effects. Three computational models are established by changing the shapes and distributions of the nozzles, the flow resistance and nozzles flow intensity of which are compared, analyzed and evaluated respectively. The calculated results show that the pressure loss in pipes of truncated cone shaped nozzles is smaller than that of cylindrical nozzles. Besides, the nozzle flow intensity is related to the speed and thickness of the layer in the process of dredging. We can change the nozzle flow intensity for better cleaning results.

Abstract:Based on the analysis of Anhui Wangdong Yangtze River bridge in the Dongliu and the basis of the conditions of the river channel, from the point of view of the navigation, this paper proposes the navigation clearance dimensions calculation of Anhui Wangdong Yangtze River bridge, analyzes the navigation layout. Combining with the channel condition, the arrangement for the bridge pier optimizationd is analyzed. According to the bridge area waterway’s condition, and in view of the existing problems of bridge type scheme, this paper analyzes the pier layout’s optimization. The optimized bridge type scheme (78 m+228 m+638 m+228 m+78 m ) can make full use of the effective navigable water, and adapt well to the channel condition, thus the bridge type scheme recommended is reasonable and feasible.

Abstract:In view of the problems existing in the engineering practice in terms of determination of the elevation of wharf deck, a new method is proposed by combining the two existing approaches of the present code for the well-sheltered situation and open seas. Using a single formula, the new method tries to avoid the difficulty in clarification of the semi-sheltered condition of wharf and is also clearer in dealing with the combination of wave loads and water levels besides its better convenience for calculation.

Abstract:Based on the physical model test, the article discusses the wave height distribution before and after the excavation of harbor basin and the impact of the excavation of harbor basin on revetment engineering.Results show that the impact of the excavation of harbor basin on design wave elements in front of revetment is very small, and that on the stability of accropodes and crown wall, wave overtopping and the scouring behind the dike is also small. The excavation of harbor basin has some impact on the bottom protection stone block, but not the cause resulting in the destruction of revetment.

Abstract:Taking an open-style high-pile frame wharf in the inland river in Chongqing as an example, this paper establishes the spatial steel frame model using MIDAS to extract the key mode to analyze the characteristics of the vibration shape. The research on the dynamic characteristics provides a basis for the structural design, vibration diagnosis and optimization design of structural dynamic characteristics.

Abstract:Many factors affect the safety of high-piled wharf. The traditional safety assessment method for the high-piled wharf mainly relies on the test results of the qualitative analysis, and seldom on the accurate quantitative evaluation. In order to analyze the safety conditions of high-piled wharf accurately, this paper carries out a research on the safety assessment with reference to the safety assessment method for bridges, in which the safety assessment is divided into visual inspection assessment and bearing capacity assessment. Through the fuzzy analytic hierarchy process, the safety degree of the pier is obtained. The method is concise and can reflect accurately the safety situation of the existing high-pile pier. It provides a foundation for the management, maintenance and reinforcement of wharves.

Abstract:As a kind of non-pole structure, internal force of structural joints of wharves can not be calculated according to Design Code for Concrete Structures of Port and Waterway Engineering (JTS 151-2011)” directly.Based on the continuous mechanism theory, the finite element method is good at analyzing the stress of reinforced concrete structure. By modeling in ROBOT, the whole wharf is simplified as a continuous beam with elastic support.Furthermore, the external force applied to structural joints and stress distribution inside the structure are calculated.The reinforcement and protection design according to results obtained and related codes are also presented. Since 2008, this design method has been applied to practical engineering with good effects.

Abstract:With reference to the structural style of inland river pier beam slab terminal, combining with practical engineering, and using the finite element analysis software, we establish the bent model with pier structure,conduct the modal analysis, and obtain the natural frequency and corresponding vibration model. According to the mechanical characteristics of the pier structures, we analyze its weaknesses and find out that under the high frequency incentive of vehicles or quay crane’s vertical load, a greater displacement will occur. This provides a basis for further dynamic analysis, structure condition assessment and research of reasonable structure types.

Abstract:A new fine coal blending facility for power generation is constructed in Huaneng coal transfer terminal of Taicang port, which could supply low cost blending coals for boiler of power plant keeping in highefficiency and stable performance. The closed-loop coal flow control composed of PLC, accurate belt scale and feeder with adjustable eccentric block wheel is adopted in real-time coal blending process of this new facility.The coal blending completed in the shiploading process on belt conveyors of Huaneng coal transfer terminal has outstanding characteristics of lower investment and operation cost, controllable and stable properties of products.

Abstract:Based on the case of the eastern section of the old wharf rebuilding in Shanghai Xuhui Binjiang project, this paper systematically expounds on the conventional problems in the reformation of the old wharf and proposes countermeasures based on the new technology.

Abstract:A new approach for defining the nautical density using the flow pattern critical conditions of fluid mud around the walls of the ships is proposed based on the similarity between the form of shear flow as ships sail in the fluid mud layer and the gravity flow of fluid mud on the gentle slope. The new methodology can avoid the uncertainty of current ones. Relevant calculation method is provided. It is shown that the nautical density is related to the cruise speed and the thickness of the fluid mud layer. Under the general cruise speed and 0.5~1.5 m thick layer condition, the nautical density in the channel of the Lianyun port is about 1.25~1.35 g/cm3.

Abstract:One dimensional numerical model from Hejiang Baisha to Jiangkou is built and used to simulate the Hejiang channel and analyze the sectional water depth under different schedulings. The calculation results show that the whole situation of Hejiang channel from Baisha to Jiangkou is favorable. The channel behind Duping ship lock has the region which does not meet the navigation requirements only in the condition of low water and middle water period, the distance is short and it’s easy to control. The channel section intervals and section types which don’t satisfy the demand of channel’s design dimensions are given and the simulation result for whole Hejiang channel is analyzed and opinions on channel’s regulation are put forward.

Abstract:This paper analyses measured Modaomen hydrological data and exhibits the temporal and spatial distribution of salinity and characteristics of fresh and salinity water mixing, as well as the correlation between salinity, water level and suspended sediment concentration in the Modaomen region. Based on the establishment of high-precision three-dimensional salinity mathematical model in Modaomen region, this paper calculates various engineering plans and examines the changes of flow field and tidal saltwater intrusion, which provides elementary base for implementation of the waterway regulation engineering. The study indicates that the salinity degree has a merely minor increase after projects indeed in the estuary to provide situation for tide intrusion. However, the influence is little and it fails to be the chief reasons for the depravation of tide intrusion in the Modaomen estuary recent years.

Abstract:Taking Baoying lock engineering as a study case, this paper carries out a comparison between centralized and dispersed filling and emptying systems focusing on the characteristics of flow condition, berthing condition and project investment, and chooses the dispersed type. It provides some reference for the lock design of the same type.

Abstract:Navigational channel regulation parameters of the middle and lower Yangtze River are derived from the shoal regulation experience of mountain rivers or small plain rivers and are not exactly applicable for the engineering design. Based on the analysis of shoal formation causes and the summary of regulation parameters about implemented channel regulation engineering, the article discusses the adaptability of regulation parameters in the middle and lower reaches of the Yangtze River. From the basic requirement of navigational channel regulation,according to the fluvial mechanism, the article firstly proposes the concept of “regulation section”, initially put forward the connotation and calculation method of the middle and lower Yangtze River navigational channel regulation parameters, and analyzes its rationality combined with the middle and lower Yangtze River channel regulation.

Abstract:Based on the fixed bed model test, we compare the changes of hydrodynamic factors of Oujiang estuary including the water level, flow, flow, branch channel’s diversion ratio before and after construction of Wenzhou-Qidu bridge, analyze and forecast the variation of flow pattern and near the bridge and the influence on flood control and navigation. The result shows that the construction of the bridge has no significant effect on flood control and drainage of Oujiang and will not change the nature of the seven North-South branch channels, and has little affect on the port channel.

Abstract:The paper focuses on the structure design of reinforced concrete in Shiqiao third-line ship lock engineering. Based on the concrete anti-cracking performance optimization, this paper uses the ANSYS analysis software to make a simulation analysis, which is about the corridor and lock chamber design using different mixture ratios. By comparing corridor and lock chamber concrete temperature fields, temperature stress distribution and the law of the change with time, the paper puts forward the better design proportioning.

Abstract:This paper studies the visualization structural design of lock-head 3D design, aiming at solving the problem of insufficiency of 3D design visual effect of domestic locks. A 3D model design system is developed by C++ object oriented features combined with AutoCAD object ARX development tools, which realizes lock-head 3D model algorithm, lock-head stability checking algorithm, and output of structure stability calculation results. It is proved by the engineering example that the result is intuitive, and helps well the lock-head structural design. It is useful for the 3D visualization technology of the hydraulic structure.

Abstract:ChangJiang Electrouic Navigational Chart(CJENC) covers a variety of elements and attributes which are essential and important information to guide safe vessel navigation. But according to related confidentiality laws and regulations, some of the elements and attributes belong to confidential content and can’t publish externally.In order to ensure normalization and security of the data, based on a comprehensive analysis of related confidentiality laws, regulations, waterway elements and attributes, this paper probes into the security classification and decryption processing method about waterway elements of CJENC. It can ensure that the CJENC guides safe navigation of vessels. Meanwhile, the security of data publishment is guaranteed.

Abstract:To improve the level of port informatization, this thesis, in terms of port environmental characteristics and operational requirements, proposes a port information collection system based on RFID and RTSL. This system constructs a highly automatic information network, which can carry out the collection and process of port information. Utilizing this system in ports, we can improve the management level and reduce the cost.

Abstract:According to Code for Soil Foundation of Port Engineering (JTS 147-1—2010), we obtain a formula for calculating the foundation’s bearing capacity of gravity wharf based on homogeneous soil(φ>0)and side loading, which is calculated originally by dividing the foundation width into many intervals and summing the ultimate bearing capacity. The intersection point b交=0.5Be is derived by the ultimate bearing capacity curve and the design load curve. The formula is verified by the two methods in the same example.

Abstract:Based on a project on shallow ultra-soft soil improvement in Gaolan seaport area in Zhuhai seaport, a field test trial area with different spacing of PVD was prepared. By field monitoring and testing, the impaction of PVD spacing on the soil improvement effect was analyzed in terms of the vacuum, the settlement and the geotechnical test parameters. It is concluded that: 1) When the PVD is constructed with a smaller spacing, the construction disturbance is bigger among the PVDs, but the improvement effect is not optimum; 2) According to the experiment and comparison, the optimum spacing of PVD is 0.8 m for this project; 3) After soil improvement, the thickness is more than 40 cm, satisfying the requirement of follow-up construction.

Abstract:The construction technology of underwater rising mortar concrete greatly reduces the engineering cost of temporary cofferdam, which makes it possible for the success and wide application of precast reinforced concrete caisson when building dock and terminal on the rock foundation. Combining with the project case of temporary water stop in the engineering of large docks, this paper analyzes the technical features, engineering methods and programs, construction points and quality control of temporary water stop construction of rising mortar concrete, and gives the instructive suggestions to the possible technological problems encountered in the rising mortar construction. The construction technology of underwater rising mortar concrete has its own unique construction methods and the construction characteristics of being economical, convenient, fast and safe, which can be extended in and applied to similar projects.

Abstract:Taking Guandaoqi beach as a study case, this paper analyzes the damage causes of the root of spur dike on gravel bed, and proposes corresponding repair measures. The analysis indicates that we shall not only ensure the dike root embedded into the initial landform by foundation trench, but also take other measures such as slope protection or stop protector to protect the dike root.

Abstract:Though serious average accident in chemical terminal is a small-probability event, it will cause serious consequences, and there is no relevant experience. Based on the average accidents in Tianyuan chemical terminal approach bridge, this article describes the key driving technology of the steel pipe pile beside the damaged approach structure and supporting unstable structure by special steel corbel to implement not only emergency repair of the approach but also permanent restoration. The technology may serve as reference for emergency repair in similar projects.