Abstract:After 30 years’reform and opening up, the coastal ports in Guangdong province has basically formed the development pattern of rational layout, structured, highly related to the regional distribution of productive forces. Now the port of Guangdong province is facing a new development environment, and the direction and ideas of the port development in the future need to be recombined. Based on the status and development environment of the coastal ports in Guangdong province and oriented to the implementation of the National Regional Development Strategy, the strategic thinking for the long-term development is studied in this paper to provide a reference for the relevant industry sectors to develop the strategic planning.

Abstract:Twenty-eight coastal tidal gauge stations are applied to calculate the annual design highest tidal level of coastal area of Guangdong province. The data of these stations are checked in credibility, coherence and typicality. The series of the data can meet the requirement of related standards. The extreme values of these stations are treated. Pearson type three distribution ( P-Ⅲ) and extreme value type one distribution are employed to calculate the annual design highest tide level in coastal area of Guangdong province. The best distribution is selected through comparison of curve fitting. The average values of the annual highest tidal levels in Guangdong coast is increased from east to west, which is same with the change of tidal range. The Cv of coastal stations, more than 0.20 in general,is bigger that of estuarine stations because the Cv is affected greatly by storm surge. The annual design highest tidal level in east Guangdong coast is lower than that of west Guangdong coast. The highest occurs in the west Guangdong coast, where the tidal range is the biggest and the storm surge is more frequent, the lowest occurs in east Guangdong coast, where the tidal range is small, such as Gangkou and Shanwei stations.

Abstract:In the 1 000 km long tidal reach of the Yangtze River, semi-diurnal tide wave goes against the stream from the estuary arrives upstream of Anqing, Anhui province. The reach is divided into the with-tide area and without-tide area by the tidal mark, and the current characteristics change area is divided by the tidal current mark.Therefore, the location of them is significant for the economic development, agriculture planning, ecological environment,navigation, waterway engineering, harbor construction, navigation safety and scientific development, etc. of the area. Based on the spot investigation data, and by the numerical simulation and harmonic analysis, it is concluded that the tidal mark of the Yangtze River is located between Anqing and Nanjing, the tidal current mark is located between Zhenjiang and Jiangxinsha. The new idea is quite different from the tradition idea, i.e., in general regard,the tidal mark of the Yangtze River is located between Tongling and Wuhu of Anhui province, and the tidal current mark is located downstream Jiangyin.

Abstract:Based on the SWEM2D model, a 2D flow and sediment numerical model is built including Yangshan harbor, the Yangtze estuary and Hangzhou bay. The measured data observed from Yangshan harbor in May 2004 shows that the vertical shear of the suspended sediment plays such a small impact on its sediment transport that a 2D sediment numerical model can almost represent the sediment transport near Yangshan harbor.The model result is in good agreement with the measured data which observed from Yangshan harbor and its adjacent areas in May 2004. On that basis, a transport velocity of suspended sediment during the spring, middle and neap tide in the Yangshan harbor and its adjacent areas is calculated. The result shows that in the Yangshan harbor, the Euler transport plays predominant role in suspended sediment transport while the Stokes drift and tidal pump play secondary. The high concentration of suspended sediment in the west of the Yangshan harbor is mainly caused by the convergence of the sediment transport from the Yangtze estuary and Hangzhou bay. Near the east of Nanhui beach, the suspended sediment transport separates into two parts: one flows northward, the other, firstly,flows towards Hangzhou bay along the underwater sediment channel at the south of Nanhui beach and then flows to Yangshan harbor by the suspended sediment transport from Hangzhou bay.

Abstract:The sheet-pile retaining structure with rigid load-relieving component is the good structural type of high-pile wharf in land-based connection in deep thick soft soil area. In order to reach the conclusion of the stress and deformation characteristics between before and after piles under the conditions of different piles row distance, back row pile spacing and excavation depth, and to do a deep study on the distribution of internal force before and after piles under the unloading cap, the results show that to increase the spacing between two rows of pile foundation can reduce the horizontal deformation, and the back-row pile stress distribution more reasonable; change the back pile spacing allows the front pile horizontal and vertical displacement are gradually increasing, and pile end bending moment and shear force are increased; the excavation depth increases the structural horizontal displacement increase.

Abstract:After analyzing 154 271 signals of instantaneous velocity of flow collected from 173 groups measured, probability model for instantaneous flow spectrum is established based on stochastic analysis theory, fluid dynamics and stochastic signal analysis theory. According to the research and discussion of distribution law of circular frequency and initial phase, it is found that circular frequency satisfies uniform distribution , initial phasealso satisfies(0,2π)uniform distribution. The research lays a solid foundation for the follow-up study of re-construction of random particle probability model and deduction of random acceleration spectrum and fluctuation pressure spectrum.

Abstract:The conventional methods, which are based on limit equilibrium approach, commonly used in the design of anchored sheet pile walls do not consider the method of construction. However, the influence of construction method in real projects is usually significant. A series of physical model experiments are conducted using both excavation and backfill methods to measure some of the parameters reflecting the behavior of sheet pile walls, including wall deformations, wall bending moments, and anchor forces. The study results indicate that walls constructed by backfill method yield significantly higher bending moments and wall deformations, but lower anchor forces.

Abstract:A 2-D mathematical model with multiple nested grids of tidal current and sediment in estuary was set up. With the help of this model, the flow and sediment transport field near the artificial island of south fort in eastern Hebei province was simulated. It was concluded from the flow field simulation that the current velocity decreased at the back of the island and at each side of the approach bridge as a result of their interception effect,and increased in front of the island for its deflecting effect. In addition, the hydrodynamic conditions at different part of the sand digging pools also revealed various characteristics because of the changes of topography. The results of the simulation of sediment field coincided with the influence of hydrodynamic conditions change on sedimentation: siltation happened where flow strength decreases, while erosion happened where flow strength increases.

Abstract:This paper summarizes common sections of the breakwater and revetment on soft ground treated by explosive compaction, analyzes two kinds of instability forms, i.e. overall instability and local instability, together with the causes, and discusses measures ensuring the stability of the breakwater from both design and construction.It is concluded that it’s crucial to ensure the breakwater to fall to the design elevation and form complete underwater platform for preventing the breakwater’s instability, while suitable construction method and process controlling are important guarantees of the stability.

Abstract:Marine geographic information system is advanced stage in GIS application, which is embedded in dynamic numerical simulation. Intuitively, it is an import method for analyzing features or changes in marine environment to show numerical simulation results with graphic images. Based on a Web GIS application platform,the application of Java2D graphic processing technique and ArcGIS JavaScript API achieves, with coupled hydrodynamic numerical model, dynamic creation, intelligent drawing and superimposed revealing with relief maps of the figures which are given by numerical simulation calculation.

Abstract:The conventional methods, which are based on limit equilibrium approach, commonly used in the design of anchored sheet pile walls do not consider the method of construction. However, the influence of construction method in real projects is usually significant. A series of physical model experiments are conducted using both excavation and backfill methods to measure some of the parameters reflecting the behavior of sheet pile walls, including wall deformations, wall bending moments, and anchor forces. The study results indicate that walls constructed by backfill method yield significantly higher bending moments and wall deformations, but lower anchor forces.

Abstract:In the time of informationized war, the logistics system is usually the target of enemy attacks. Choosing a reasonable transportation scheme can prevent enemy attacks and reduce transportation costs so as to refine the transportation support. Based on wars’ requisition towards transportation and the battlefield environments’influence on efficiency of transportation, the paper establishes a performance assessment target system of military container transportation and puts forward a method to get weight values in complex environment, then uses the theory of Fuzzy Neural Network to build a method of best transportation programmers’ choice. Target parameters obfuscated into feature vector as the input, and comprehensive evaluation values as the expected output, the network is finally used after training and well resulted to evaluate multiple route selection schemes.

Abstract:This paper discusses a scientific model for predicting the service life of concrete exposed to acid environment by researching the deteriorating law, and accelerating test for concrete deterioration in acidic environment.There are three ways used for predicting the service life of concrete exposed to acid environment: (1) based on grey system, predicting the law of strength change by GM(1,1); (2) based on Arrhenius’s theorem, predicting the service life of concrete by the law of strength change; (3) based on the law of corrosion depth tested in the concrete exposed to acid environment,predicting the service life of concrete. Results show that the prediction model based on grey system or Arrhenius’s theorem is feasible for predicting service-life of concrete subjected to acid corrosion; Moreover, this paper puts forward the idea of comprehensively analyzing the service life of concrete combined with the law of corrosion depth.

Abstract:To present a novel method to solve the problem of interaction between waves and floating body moored with tension cables quickly and factually, this paper establishes the numerical wave tank based on 2D boundary element method (BEM), in which, the role from tension cables is presented with mooring stiffness matrix.Contrasting the results with those by other scholars, we know that the program is reliable, and the method is beneficial to the research and design on ocean engineering.

Abstract:The integral steel sleeve box is characterized by low efficiency and high cost. Considering construction of one hundred more abutments in Xiangjiang river Changsha comprehensive hub lock project, we design a new-type combined prestressed steel sleeve box, which applies the prestressed steel wire to combine the pieces of steel sleeve boxes into integrity. By this way, all operation of steel sleeve boxes are transferred from underwater to overwater. At present, 120 abutments of various shapes have finished construction, which evidence the good effect and indicate extensive application perspective.

Abstract:Concerning detection of reinforcement protection layer thickness and spacing for the shipway structures, this paper robes into the application of ground-penetrating radar to the detection of protective layer’s thickness of the large-size reinforced concrete structure, which not only remedies the defects of existing magnetic detection equipment, but also expands the scope of application of the ground-penetrating radar.

Abstract:C50 grade high-performance (HPC) fly ash concrete is used in the cable support tower of Jiujiang Yangtze River highway bridge and the appearance quality is required to meet the standard of fair-faced concrete.Aiming at the engineering practice and actual service environment of the bridge site, we put forward the appearance quality control index and durability design requirements for the cable support tower HPC fair-faced concrete structure, and study the alkali reaction activity of aggregates and the effects of fly ash content on resistances of the cable support tower concretes to carbonation, acid rain, permeability and freezing-thawing through experiment. The results show that the sand and crushed stone used in the engineering construction has no alkali activity, and the comprehensive durability of the cable support tower concrete is improved by 22.5% fly ash as the substitution of portland cement and meets the design index requirements.

Abstract:A comparative study is made on the seismic design of harbor structures based on Chinese codes,US guidelines, Japanese standards, as well as the guideline of International Navigation Association. This is the first part of the series papers which introduces the development of seismic design method of harbor structures in Chinese codes, US codes, Japanese codes, as well as Seismic design guideline for port structures presented by the International Navigation Association in 2001.

Abstract:The software of ANSYS/LS-DYNA is used to simulate the process of collision between a 5 000ton break-bulk cargo ship and the 30 000 ton high-piled wharf of Jiangyin port with the speed of 2 m/s and 5 m/s. This article analyzes the forces and change of energy in the process of collision. Comparing with the result of specifications,general rules and characteristics are obtained, which provide theoretical supports and an engineering guidance during the design and maintenance of similar piers.

Abstract:Concerning Penglai Jutao No. 1 slideway construction, this paper analyzes the construction schemes from the construction l difficulty degree, structure force, pile foundation test and engineering cost,etc., summarizes the advantages and disadvantages of the schemes, discusses problems encountered during the transformation of the gravity caisson wharf to the marine heavy wharf and countermeasures to serve as a reference for similar engineering.

Abstract:In the design of a jetty for an EPC power plant project, considering comprehensively the local factors such as wind, wave, currents, sediment movement, topography, geology and construction conditions to optimize the plan of jetty and breakwater, we create sufficient condition for the profit of the contractor. The designed scheme recommended is convenient for construction and saves investment, and may serve as a reference for similar projects.

Abstract:The steel-tube-concrete combined bearing inland overhead vertical wharf was built up adapting to the complex geologic-hydrologic conditions and construction environment during 175 m water storage of the Three Gorges. Meanwhile, a numerical model was established under consideration of steel tube-R. C. concrete combined bearing. By comparing test data with numerical results, we verified the reliability of the model and further proposed the element’s unit load combination, which was used to investigate the mechanical performance of this kind of wharf under complicated conditions. Moreover, the weak part and reinforcement were proposed.

Abstract:The squeezing damage in expansion joints of high-piled wharf is the general weakness in actual projects, which has a serious impact on the normal use of wharf. To solve this problem, combining the practical engineering design of the high-piled wharf, using the finite element method, we study the aperture comprehensively of three states, i.e., extrusion contact, critical contact and no contact of the wharf panel, analyze the variation of internal forces of wharf panel with different post-construction apertures theoretically, and propose a new idea on determination of a reasonable post-construction aperture, which provides the basis for the design of wharf segments and construction control.

Abstract:Combining the design of Waigaoqiao phase VI in Shanghai port and the operation requirement of automobile ro-ro springboard, two determination methods of surface elevation for automobile ro-ro terminal with slab-beam structure of high-piles, based on the requirement for the height and time of springboard operation are presented. The successful engineering application proves that the two determination methods of surface elevation are reasonable.

Abstract:Based on the structural and dynamic method, this paper sets up a dynamic model on the traffic capacity of the TGP ship lock to obtian the potential capacity, which describes the dynamic relationship between the cargo-boat tonnage, operating time, ship number, efficiency of using area with traffic capacity. The paper also calculates the traffic capacity of the TGP ship lock from 2011 to 2030, and forecasts that the traffic capacity of the TGP ship lock will be saturated after 2015, and advices to optimize the standard ships and start research and demonstration on the newly-built navigation facilities.

Abstract:To study navigation efficiency of the double-track bridge’s bridge area, bridge area of the doubletrack bridge is considered as a tandem queuing network to analyze their navigating efficiency. The two series of queuing system model are built to simulate bridge area of double-track bridge. Single bridge is considered as M/M/1 queuing system to calculate its navigation efficiency. The navigation efficiency on peak time and daily time has been analyzed. After analyzing the simulating and calculating results, two types of bottlenecks in the system are indentified, and the reasons of bottlenecks are found. Then, the suggestions will be given about the bridge site selection and ship traffic organization during operation.

Abstract:Based on the analysis of the development status of Yangtze River digital waterway and intelligent waterway transportation system, the article proposes the system architecture of Yangtze River intelligent waterway.With a further analysis of its basic characteristics and strengths, the article points out the key technologies of Yangtze River intelligent waterway and its development trend. To draw a conclusion, the article makes several suggestions about the development of Yangtze River intelligent waterway.

Abstract:Based on the practice of water safety supervision and combining the grid management thought,this paper expounds the connotation, mesh and other contents of water safety supervision grid, proposes information system management model and water safety supervision business model based on the grid, business process and system structure under the grid concept . The research results lay a foundation for the development and implementation of water safety supervision of grid information system.

Abstract:In order to reduce the accidents from collision between ship and bridge, and improve the navigation safety of the bridge area of water, we carry out real-time detection and tracking to the moving ship of the bridge area of water based on the object detection arithmetic and by the AForge.NET toolkit design, forecast the course of a ship according to the navigation contrail of the moving ship, estimate whether the ship is facing the danger of bridge collision, and then take relative forewarning measures. The test in Bengbu of the mainstream of the Huaihe river in Anhui province proves that and the detection effect is satisfactory and can provide availability and feasible proposal to the active forewarning of the bridge anti-collision of the bridge group in the river of advanced channel.

Abstract:Through the strength test without lateral restraint pressure, the effect of lime, fly ash and cement with different ways including only one mineral, two minerals and three minerals mixed in silty sand to the no lateral restraint compressive strength of silty sand is carried out comprehensively. The experimental results show: When one mineral admixture is used to reinforce silty sand soil, the effect of reinforcement of mixing cement is better than that of reinforcement of mixing lime;When two mineral admixtures are used to reinforce silty sand soil, the effect of reinforcement of mixing lime and fly ash is better than that of reinforcement of mixing lime and cement, or cement and fly ash, and mixing lime and fly ash into silty sand soil with lime content more than equal to 6%, and the fly ash content for lime three times is determined to be the optimal mix;There is almost no difference between the reinforcement of mixing two mineral admixtures and three mineral admixtures into silty sand soil.

Abstract:Considering the whole process of the cushion from the excavation to backfilling, we constructed the optimization utility model for replacement sand cushion under consideration of code as constraint. According to this model, we analyzed the impact of different standard values of bearing capacity of sand cushion against the optimal results by an example. The example shows that compared with the trial algorithm design, the use of this optimization method can not only reduce the amount of sand cushion filling but also be able to directly derive the optimal pit excavation volume.

Abstract:Electro-osmosis can reduce the water content of silt quickly and improve its undrained shear strength. Hence, silt can be turned into resources by electro-osmosis. But the major problem to be resolved is to raise the efficiency and save energy during engineering applications. The comparative tests between natural drainage and three ways of reducing water content by electro-osmosis in silt were conducted using a newly developed apparatus.Water discharge, current and electric potential were recorded during the tests，and water content and undrained shear strength were measured at the beginning and the end of the tests. Then soil characteristics were studied from the point of energy consumption, electro-osmotic efficiency and costs on the basis of the measured data. The results show that when dealing with dredged silt by electro-osmosis, the purposes of improving efficiency and saving energy to reduce the water content are achieved by moving the electrodes parallel and searching appropriate conditions of electrodes distance and working time.

Abstract:Based on field testing data of 8 large-diameter super-length piles, this paper selected grey model GM(2,1) to predict pile bearing capacity, and carried out a comparison with two types of common exponential models. It was found that the relative error of the predicted value of pile bearing capacity was about±0.8% for 8 large-diameter super-length piles, and the validating effect was very good with the index p and index c; GM(2,1) was better than two types of common exponential models. It is concluded that GM(2,1) is a good model which doesn t limit sample number and can add new sample to assure higher-precision prediction; it is feasible to predict bearing capacity of large- diameter super-length pile based on GM(2,1).

Abstract:It is assumed that horizontal displacement of pile has a longitudinally cubic power function, and equivalent-moment finite element-iterative method which can analyze the P-Δ effect of piles under inclined and eccentric loads, is derived in the paper. And matlab process of equivalent-moment finite element-iterative method is edited. Case analysis is done in the paper for displacement and stress calculation of pile under inclined and eccentric loads, moment, pile gravity, horizontal distributed loads, vertical distributed loads, scattering vertical forces and soil-pile friction. Finally conclusions are drawn as follows: (1) equivalent-moment finite element-iterative method is proved to be a effective method for P-Δ effect analysis of piles under complex loads; (2) P-Δ effect is notable while piers are high.

Abstract:Based on the pile test of the special port protect, this paper carried out axial loading tests on two groups of large-diameter steel-pipe piles, and measured the axial force simultaneously by the strain sensors embedded on the test piles. The axial load bearing characteristics and transfer mechanism of the large-diameter steel-pipe pile on deep sediment layers were also analyzed.

Abstract:In order to benefit the long-term maintenance dredging of the Yangtze Estuary deepwater channel,we carried out a study on the application of the trailing suction hopper dredger (TSHD) loading barge technology.Based on the in-situ simulation tests and the designed capabilities of the specified TSHD and barge, we illuminate the working process, working period and efficiency, operation conditions and economic benefit. It is concluded that the TSHD loading barge technology can be applied in the Yangtze estuary. Meanwhile, some suggestions are put forward.

Abstract:In combination with the unique advantage of FLAC3D with explicit finite difference method in application to large-scale numerical analysis in geotechnical engineering area, and according to its shortage of pre-processing capability of building up complex numerical model especially for structural element model, a preprocessing software for FLAC3D based on HyperMesh is developed to solve this issue. The basic approach and flow diagram of the pre-processing program are expounded, and the node conversion rule of solid element and structural element between HyperMesh and FLAC3D is presented. Two typical excavation case histories, one with inside struts and retaining wall, another with soil nails and shot concrete covering, are given to demonstrate the engineering feasibility of the developed program.

Abstract:This article explores the laws of displacement and settlement during construction of the riprap embankment based on the analysis of the monitoring data of the construction. The loading rate and the layered loading height shoud be under control in the process of the dyke construction. It is feasible to control the loading speed and layered loading height. Measures such as decreasing the loaded height, loading on both sides of the dyke simultaneously, timely following of apron rockfills and extending the time of permanent load should be taken to make sure the effective and safe dyke construction.

Abstract:To counter the severe environment of open sea construction integral bridge pier of Donghai bridge sea-crossing section, we adopt two U-shape steel sleeve boxes installed on the top of the integral bridge pier and then casting the bottom concrete and wet joints to form a dry construction environment under the principle of using as possible as we can the present craft and machinery within the lowest operation time. The construction technology of open sea bridge pier connecting with U-shape concrete sleeve box, stress analysis of different working conditions and construction technical measures are presented.