Abstract:In order to reduce the top of the seawall elevation safely and reliably, we analyze the domestic and international norms of the tolerable overtopping limit, and study the operation condition, design condition and check condition and corresponding tolerable overtopping limit for three conditions for Hongkong-Zhuhai-Macau bridge Zhuhai-Macau frontier port artificial island reclamation works. Combining the physical model test, we carry out the optimal design of wave overtopping of seawall. By controlling the height difference between the artificial island ground and the top of the seawall elevation in the range of normal human height, we can offer well sky and sea view for passengers.

Abstract:Local scour of the Hong Kong-Zhuhai-Macao bridge artificial island is a key technical problem to be solved in bridge project design. . Based on the field data analysis and physical model validation, using the normal extension method of series models, we study the flow pattern variation and local scour around the artificial island. The results show that in the flood season of spring tide situation, the maximum scouring depth of the east andwest island is 10.3 m and 9.0 m respectively, and the scour concentrates in the island bridge and tunnel with protective section and near the anti-collision pier; The maximum scour depth relates to the artificial island geometry, flow velocity, sand characteristics of the engineering water area and depth of such related, and the scouring plane form relates to the island type, flow angle, speed difference of the rising and falling tide, and tidal duration as well.

Abstract:The deformation wave height of the seawall waves in shallow water of Zhejiang region is researched. Based on the Zhejiang Seawall Engineering Technical Requirements and Calculus Principle, we derive the analytic formula for calculating directly the shallow water waves deformation, and study the shallow water deformation under the flat-bottomed sea bed, single slope of the sea bed, the segmented polyline sea-bed and three parabolic curve sea-bed waves, and give the analytical expressions for the concise calculation, to serve as reference for the engineering design and improve the design efficiency. It is verified by project examples that the precision of wave height calculation fully meets the engineering requirement.

Abstract:Arc-shaped crest wall can effectively decrease overtopping across slopping breakwater and help reduce elevation of crest wall. So it is more and more used in coastal engineering. But there is not any provision on how to calculate wave pressure on arc-shaped crest wall in current standards. Based on a physical experiment on an actual project, this paper presents measured pressure results along the arc-line of the crest wall, which is further compared with the calculated results following the standard provisions on vertical crest-wall. Finally, pressure distribution on the crest wall is summarized. These results can be used as reference to other similar projects.

Abstract:Artificial concrete blocks are used for the armor layer of breakwater, withstanding rough sea, with the characteristics of good stability and easily installment. The double-link armor block is a new type one, which is adopted in a breakwater repairing engineering of power station. One scale 1∶30 physical model is performed in the wave flume, and the cross section with the double-link armor block is verified in stability under different water levels and wave conditions. The breakwater is mound sloping breakwater, armored by 8 t double-link armor block. The wave is above 5 m in prototype, and the average wave period is 13.83 s. A stable section is obtained by testing. The parameters of double-link armor block are obtained as coefficient of stability KD, form factor c, porosity of blocks P′, roughness parameter of permeation KΔ and block number in 100 m2 N. It is shown that the double-link armor block has advantages including economizing material as one layer, random placing, easy manufacturing, as well as high stability, etc. The achievements of design and study have been applied to the engineering and achieved favorable effects. The double-link armor block is very worthy of popularizing.

Abstract:The shrinkage and expansion of concrete are conducted for analyzing the cracks of the immersed tube. The aggregate species, admixture dosage and amount of cementing materials have great impacts on concrete shrinkage,. Tthe expansion of concrete is 150~250 με after immersed in water for 7 days, and the dry shrinkage of 150~200 με are measured after being pulled out from water and stored in dry the shrinkage room for 28 days. The amount of expansion and secondary dry shrinkage of the concreterelate little to the expansive agent.

Abstract:Too thick siltation deposit of foundation trench under water may cause more settlement and even slide of ground. No detection methods for thickness of siltation deposit are proposed by present codes. Many kinds of detection methods are used for engineering and some methods are improper. Basing on distinguishing siltation deposit from fluid mud, the present possible detection methods are sorted, introduced simply and evaluated. Finally, the importance of distinguishing siltation deposit from fluid mud and choosing proper detection method is pointed out through a project.

Abstract:Safety assessment is carried out for the wharf by establishing two finite element models by ANSYS. The result shows that contact element shall be set between the caisson and rubble-mound foundation when calculating the rubble-mound foundation’s stress to guarantee a safer and more reliable result. The sliding stability and resistance to pour stability of wharf are also calculated and analyzed. It is shown that the calculation for wharf’s safety assessment using ANSYS is simple in calculation and the calculated results is reliable.

Abstract:Based on the implicit module and the FEM-IEM coupling model of ABAQUS, we study the dynamic response of the single anchor sheet pile wharf under the seismic load. It is found that the peak acceleration has a great effect upon the sheet pile bending moment, shear force and tension force of tension bar with the same seismic wave in different peak accelerations. Comparing with the data of static analysis, the sheet pile’s maximum bending moment grows by 40% and the tension force of tension bar by 10% to 50% as the seismic peak acceleration increases by 0.1g, but the growing rate of tension force of tension bar tends to be stable at the end. Under the seismic load, the maximum tension force of tension bar closes to the maximum shear force per unit width on the sheet pile. This paper makes a study on the impact of seismic peak acceleration upon the range of plastic zone between sheet pile bottom and anchorage wall. The results show that seismic ground motion imposes an important effect on the sheet pile wharf in comparison with static load, thus it provides references for design of the sheet pile wharf under the influence of earthquake.

Abstract:According to the relationship among the ship parameters including ship dimensions, displacement,wind area, shape coefficient of ship parameters and ship shape characteristics which are stipulated in the current code, and considering the characteristics that ship photos and ship itself are in line with similar scale, we collect and analyze ship photos and related data, and achieve the calculation method and corresponding parameters for the ship height above water surface, which solves the problem due to the lack of method for the calculation of the ship height above water surface in JTS 144-1—2010 Load Code for Harbour Engineering.

Abstract:The vertical foundation stress and horizontal friction of the higher level wharf is taken as an overload, which is converted into the earth pressure and acting on the lower level wharf. Based on the reliability theory and combining with the project example of Naxigou wharf, we analyze the most disadvantageous condition combination and the worst failure mode of the multi-stage gravity wharf. The results show that the anti-sliding stability has a minimum reliability when water-level is the same as the height of the junior and the greater wharf among various kinds of function combinations, which is the controlling condition.

Abstract:To counter the spatial issues of pile foundation design for complex pile-supported structure and lack expression of traditional geological data, we establish the pile information database for digitally and visually managing piles to facilitate design work. By coupling 3D piles model and strata-graphic model, we achieve several visual-aided design functions, such as reconstruction of piles and strata, collision detection and optimization of piles layout, selection of pile bearing stratum, calculation of pile length and axial bearing capacity, and automatic output of piles layout in 2D. The successful application of the technical solutions has improved the efficiency and level of pile foundation design for complex pile-supported structure.

Abstract:The large-diameter cylindrical pile is applied to the vertical pile due to high strength, durability and other economic advantages, but it’s hard for the large-diameter cylindrical pile to bear the horizontal load, so it is considered to adopt the steel pipe pile to bear it, which is reasonable in design idea and arrangement, feasible in construction, and can adapt to the development demand of wharf enlargement and specialness. The successful application of φ1 400 large-diameter pile and cylindrical pile in Lianyungang may serve as reference for the pile foundation design of similar projects in the region.

Abstract:Considering the importance of project management for port engineering major pieces’collection and distribution, and to counter the existing manual management mode and its shortcoming such as poor planning, low working efficiency , and lagging of real-time supervision, this paper proposes to establish the advanced, efficient and safe modern logistics control system which satisfies the whole-weather continuous operation by applying the advanced internet of things including the recognition technology, wireless networking technology, GIS, etc., and realize the intelligent recognition, positioning, tracing, monitoring and management.

Abstract:The cross-flow of channel in the entrance of the encircle breakwater which stretch out the coast is always concerned, for it may influence the ship to navigate. For the different design plan of the encircle breakwater entrance in Xuwei port, the cross-flow of every design plan is simulated by the 2D tidal-current numerical model. The results shows that the maximum cross-flow of flood tide is greater than that of the ebb tide, which means that the maximum cross-flow is dominated by flood tide; The maximum cross-flow of every plan occurres in the waters near the entrance(or the dike head) around high tide level period. The maximum cross-flow is related to the width and the layout of the entrance. After the double-dike is built, the location of the maximum cross-flow moves outward the waters near the dike head. The maximum cross-flow gradually decreases towards the entrance, which is good for ships near the entrance to navigate.

Abstract:Anqing waterway has narrow inlet and outlet but very broad middle part, where develops sandbars. Through the river bed evolution analysis, the talweg now points to the middle of the river, beneficial to the middle branch development and detrimental to the navigation channel conditions. According to the development trend, waterway regulation is needed to ensure that the channel meets the standards 6.0 m×200 m×1 050 m. Firstly, the 2D flow and sediment mathematical model is utilized to simulate the effects of several different control- protection schemes, and the results indicate that submerged dike and bottom protection can limit the development of the middle branch effectively; then, on the basis of effect comparisons, comprehensive consideration is taken to propose a recommended control-protection; finally, the variation of navigation channel conditions is calculated and analyzed by water and sediment series, which can provide information for project constructions.

Abstract:This paper collects the data about measured terrain, hydrology and track line of ships of Heshang rapids in perennial backwater area of the Three Gorges reservoir, establishes the mathematical model, analyzes the channel condition variation in the flood season, and gains the critical discharge for ships ascending Heshang rapids. The results show that the channel condition of Heshang rapids in the flood season is improved, vertically-averaged flow and slop decreases, and water depth and width of navigation increases. The critical discharge for the 10 000DTW fleet and 3 000DTW ship increases, and the shipping efficiency in Three Gorges reservoir area is improved.

Abstract:This paper introduces the project of LNG terminal and waterway dredging in Zhuhai port. Based on the special security requirements, it establishes the model of channel capacity, and calculates the degree of influence by two ways. At last, it compares the results and analyses the relevant, and puts forward the countermeasures to reduce the impact of LNG ships.

Abstract:Three layout schemes for the second and third line ship lock of Feillaixia hydrojunction project are compared and analyzed from aspects of water-borne traffic, ship lock layout space, flow condition for navigation, influence on the original project’s flood control function, construction difficulty, area of land expropriation, and project investment, etc. The research results indicate that the left shore scheme could not meet the construction requirements forinenough layout space and the construction period′s serious interference with the power station, the water release sluice, and serious disturbance upon the operation management of the first line ship lock. Compared with the middle line scheme, the right shore scheme has an advantage in the less project investment, smaller influence on the flood control function and better construction condition, etc.Therefore, the right shore scheme is recommended as the construction scheme.

Abstract:Liulaojian multiline-lock is located at Beijing-Hangzhou Grand Canal. To solve the problem that when the No.2 and No.3 lock to drain, the No.1 lock reverse waterhead is too high to make the lower miter gate hoist mechanism damage, a two-dimensional flow mathematical model is developed to calculate the upstream and downstream flow condition of the ship lock, in accordance with the Code for Master Design of Shiplocks, compare the navigation flow condition of various scheme, and choose the engineering measures which is satisfied the demands. Due to the complex characteristics of the natural river′s boundary, we adopt the unstructured triangular mesh and use the finite volume method to discrete the flow control equation.

Abstract:On the basis of the integrated physical model test and telecontrol self-propulsion ship model test of the Xiaoxitan junction, according to the hydraucone type and slight bending river of the position of this dam site, we put forward a non-orthogonal layout of ship-lock on the upside of the dam axis, which solves the problem of the difficulty of connection between the approach channel and river mainstream, and propose a new arrangement for the ship lock arranged difficulties on the bending river and construction in progress to build an additional ship lock.

Abstract:Based on normal physical model test, we analyze the influence of the first-line ship lock navigation condition on the second-line ship lock construction of Zhuzhou navigation power junction in Xiangjiang river, the navigation conditions of first-line ship lock, changes in the original boundary conditions after the second-line ship lock construction, variation of hydraulic parameters on the first-line ship lock approach entrance area and the lower connection on the channel, as well as the adaptability between the existing training structure and the new construction. The results show that the influence of the second-line ship lock construction on the first-line ship lock navigation condition is limited, and the navigation condition of the first-line ship lock is the same as that before the new construction.

Abstract:Sand excavation and channel regulation in Dongjiang delta have great impacts on the natural evolution of the river network area riverbed morphology. The two-dimensional tidal flow mathematical model is used for the tidal current study of Daoyunhai waterway, in which the finite volume method is adopted. On the basis of the model verification against the field-measured date, numerical simulation of tidal flow field before and after regulation is carried out. The treatment scheme of the hydrodynamic is calculated, and the river network channel regulation from the point of view of the dynamic field is analyzed. The study results show that the impact on the flow of water after implementation of the project mainly concentrates in the vicinity of the project. The impact on the drop, flow rate and water level of the river are small. Moreover, it provides the theoretical guidance of channel regulation in the tidal river network area.

Abstract:To solve the traffic efficiency problem of ro-ro ships in Hainan Xiuying Port so as to improve the traffic capacity and safety level, we propose a mathematic model based on vessel characteristics, manoeuvring features and boundary conditions of the waterway in that area according to relative regulations of Design Code of General Layout for Sea Port. Based on the theoretical calculation, waterway traffic simulation and full scale trial, we study the two-way traffic capacity of Xiuying channel and know that Xiuying port can satisfy the demands of existed ro-ro ships , and put forward some suggestions concerning the safety measures.

Abstract:With fluid-structure interaction effect considered, the key factor in the analysis of flow-induced vibration of the sector gate is to get self-vibration characteristics. Adopting the finite element numerical method, we get the self-vibration frequency and the modal characters of the sector gate in different water level conditions. The gates are made to decrease its self-vibration frequencies and change modal characters, which are shown by calculations. Reasonable suggestions on the safe operation of the gate are put forward on the basis of computation and analysis.

Abstract:According to the basic principles of the bridge site selection, and combining with the bridge area project overview and channel condition, we compare the orthogonal and bias bridge sites, and draw the Jinghong Mengle bridge skew bridge site as the recommended bridge site. Based on the research on theinfluence of navigation clearance dimensions and pier bit arrangement on navigation, we determine the 330 m span steel box arch bridge as the recommended bridge. Moreover, through the flow numerical simulation and combining with the measured data, we analyze its influence on navigation flow condition and thus determine the reasonableness of the recommended scheme.

Abstract:The design lowest navigable stage of Jialing river downstream waterway affected by unsteady flow of hydropower station is researched. Based on the analysis of the downstream water stage of hydropower station, storage outflow in the period of 2009—2010 and hydropower station operation mode in the Jialing river, we calculate the design lowest navigable discharge of downstream waterway of hydropower station using storage outflow in different time scales, and calculate the design lowest navigable stage of downstream waterway of hydropower station by water stage linear correlation between water gauges.

Abstract:Taking the Qingju ship lock project in Sichuan province as the background, this paper calculates the inner force of lock chamber structure by Plane Simplified Method and Finite Element Method, and carries out an analysis on the prototype observation data, which shows that the Plane Simplified Method is difficult to meet the need of calculation for asymmetric gate double wall floor type reaming of ship lock structures, while the calculation results based on the nonlinear finite element method tallies better with the real stress state. Moreover, it can reflect the most unfavorable position of internal ship lock structures, stress state and the changing laws, and the results may serve as reference for the engineering design of the ship lock.

Abstract:Waterway maintenance is an efficient way to advance the ability of navigations. The paper builds the evaluation system for provincial inland waterway maintenance of each province, through analyzing the present situation of inland waterway maintenance, and then gets the factor scores and comprehensive ranking of the provincial inland waterways maintenance status by quantitative analysis on the evaluation index. Indicators with strong correlation and large numbers could be reduced by factor analysis, which makes the evaluation result more reasonable and effective, and gets the overall actual evaluation on the channel maintenance level of the region by comparing and analyzing the score of each factor. The evaluation results can reflect the provincial inland waterway maintenance status of each province and provides a basis for the decision-making for each city’s waterway management.

Abstract:A retractable and extendable load cell and a special connection junction are developed for self-balanced test of steel pipe pile. Firstly the special connection junction is welded at the self-balanced position with the steel pipe pile when the pile is set up. Then, the inner soil above the junction is cleaned up and the retractable load cell is set up in the junction, which can load the upper and lower pile segments. Based on the new self-balanced method test of steel pipe pile, we analyze the bearing characteristics for a large-diameter steel pipe pile at Donghai bridge offshore wind farm, in which the gross bearing capacity is obtained as well as the side and base resistance. The results of the study show that the new self-balanced method testing technology achieves a good test effect and economic benefit.

Abstract:Based on the analysis of main influential factors of p-y curve and a project field testing result and according to the calculation method suggested in the code ,this paper selects suitable characteristic parameters and strength index of soft clay and establishes a new p-y curve method and compares with calculation results of m-method, NL-method and standard p-y curve method. The results show that the calculated value and measured value of the maximum bending movement of pile integrity are close to each other, but there are significant differences among different calculation methods and the calculated value of the suggested p-y curve is the best one to fit the measured value.

Abstract:Based on a project, we carry out a numerical analysis for the pile-soil interaction of the blind sheet-pile bank connecting structure. We also study the effect of the calculation parameters on the pile-soil interaction. When the blind sheet-pile suffers the rear earth pressure, the earth pressure among the sheet-pile passes to both sides of the barrier piles, so that it reduces the earth pressure bore by the front piles which produces the soil arching effect, and improves the bearing capacity of the bank connecting structure. It is found that the soil cohesion and the internal friction angel have greater impacts on pile-soil interaction. With the cohesion and internal friction angel increase, the load-bearing of blind piles also increases, and finally tends to a stabilized value. When the cohesive reaches to a certain value, the internal friction angel has a less impact on the pile-soil interaction. In order to make an optimal design, we must make a comprehensive consideration about not only the span of the blind pile but also the span between the blind pile and the front row pile. It can be used as a secondary factor when designing the bank connecting structure of the blind sheet pile, because the soil elastic modulus, Poisson’s ration and the coefficient of friction of the pile have small effects on the pile-soil interaction.

Abstract:This paper reviews and summarizes the post cyclic behavior of cohesive soil, discusses the experimental study and theoretical study of post cyclic properties of cohesive soil, and analyzes the quasi over consolidation properties after cyclic load. Based on the assumption that post cyclic behavior of cohesive soil is similar with over consolidated soil, this paper summarizes the theoretical relation of post cyclic strength and modulus with quasi over consolidation ratio, and pore pressure.

Abstract:The force and motion response of the immersed tube tunnel element aren important parameters of immersed tunnel construction. The immersed tube tunnel element that deposit, float and sink to the sea bed is the world’s longest and widest immersed tunnel. We can’t calculate it accurately using the computational structural mechanics and the computational fluid dynamic. In order to study the hydrodynamic behaviors of element during its construction, we carry out a scaled model test to investigate the motion responses of the tunnel element in the immersion under wave and obtain current actions and tensions acting on the controlling cables of its immersing system based on the similarity theory, which may serve as a basis for the key parameters in the numerical simulation analysis, and a guidance to the construction of the immersed tunnel.

Abstract:This paper introduces the engineering of cable immersed tube tunnel foundation from Geojae Island, Pusan, South Korea, which adopts the paving and leveling construction technology of platform deep water paving and leveling barge, serving as reference for the construction of immersed tube tunnel foundation.

Abstract:This paper introduces the construction technology of breakwater for Adipala Power Plant, Central Java, Indonesia, analyzes the hydrologic characteristics of the open Indian Ocean, expounds the significance of the plane pattern and hydraulic characteristics of the breakwater on the construction technology, ship and machine arrangement, as well as protection of breakwater head, discusses the effective mode of breakwater construction under high-frequency and strong wave in the Indian Ocean. The result may serve as reference for similar projects.

Abstract:In order to shorten the constructive period and improve the working efficiency, we create a method of one-step forming under water of a varied section drilling pile. Based on the introduction of the engineering condition and technical difficulties, this paper analyzes the technical plan in detail. A new steel protecting tube is invented to realize integral pouring of pile cap and pile body under water and one-step forming of the drilling pile, which is proved to be reliable in engineering quality by the practical engineering and obtains a patent license.