Abstract:The numerical simulations of tidal current and sediment are carried out after the implementation of the project of Hongkong-Zhuhai-Macao bridge. The piers are treated as solid boundary and the grids near the piers are enriched. According to the results of the numerical simulation, the changes of tidal level, velocity of tidal current,tidal volume and the siltation and erosion of the underwater topography in nearby sea area after the implementation of the project are analyzed. The results show that the effect of constructing Hongkong-Zhuhai-Macao bridge in the hydrodynamic sediment environment is only limited to the vicinity of the bridge, and it has no negative effect on Lingding navigational channel and has no influence on the patterns of swale of Lingdingyang bay.

Abstract:A group of prediction models of GM (1,1) with unequal step distance which can predict the ultimate bearing capacity of a single pile are established based on the gray system theory. According to the results of static load test by a engineering example, the ultimate bearing capacity is predicted and compared with the results calculated by relevant codes. The analysis shows that the prediction accuracy can meet the engineering need.

Abstract:The MIKE21 SW wave spectrum model was applied to simulate the wave field in the sea around the Yangtze River estuary during MAISHA Typhoon and a cold snap in January 2006. The results were in good agreement with the measured data, which proved the well applicability of the model in the area and showed that the wave-fields in different weather systems had significantly different characteristics.

Abstract:By contrast tests on local scour around cylinder pile clusters in different conditions with different cylinder pile clusters, different velocities or water depths in an unilateralism invariableness-uniform flow flume, the data of flume topography change after testing is analyzed. The results show that the local scour around cylinder pile cluster is extremely complex, the existence of pile cluster changed significantly the original motion state of water sand, and intensified the local scour around cylinder pile cluster. The characteristics of scouring and deposition of bed influenced by cylinder pile cluster can’t be simply explained by cylinder pile cluster resistance, it is most related to and affected by the arranging form of cylinder piles. Furthermore, the influence of the flow velocity and the water depth is limited and is actually reflected through the arranging of cylinder piles in the tested cylinder pile cluster.

Abstract:The anchor-girder composite system is one kind of reaction methods used frequently in rock mass in-situ test, but the force on rock mass caused by the anchor will lead to a certain degree of bias on the deformation accuracy of rock mass. Through establishing the theoretical model of force on rock mass caused by anchor, the theoretical formula of deformation on test points caused by anchor was deduced. Compared with the theoretical deformation of rock mass, the formula on the degree of influence caused by contact pressure in rock mass in-situ test was given. Combining with the in-situ test, according to mechanics parameters of a certainⅡkind of rock mass,the theoretical deformation and reaction-caused deformation were calculated separately. The results show that for thisⅡkind of rock mass, the reaction-caused deformation is 0.035% of the theoretical deformation, so the theoretical foundation was provided for the enhancement of accuracy of the test results.

Abstract:This paper introduces a new type of sheet pile walls, steel sheet pile wharf, combined with QASIM Pakistan International Container Port Berth Expansion Project Phase II, and introduces numerical calculation methods for simulating the steel sheet pile wharf structure using the ANSYS finite element software and business software WALLAP. By a comparison between the real-measured result and the calculation result by the WALLAP,the accuracy of numerical methods is verified.

Abstract:Liaohe ultra-large bridge is designed as a cable-stayed bridge with a main span 436 m, double pylons and double cable planes, and it is located at the Liaohe river estuary. For the concrete structures’ durability of this project, we shall consider not only the dual corrosions by the sea water and the fresh water, but also the freezing and thawing damage to the durable influence. Therefore, an extremely high requirement was need for the concrete structures’ durability. Connecting with the engineering example, this paper emphatically introduces the application of high performance concrete, the impressed current cathodic protection, the anticorrosive coating, etc. for increasing the durability of concrete.

Abstract:The engineering project cost management guided by value chain thought is helpful for enterprise to hold the key of the project and ensure the benefit. According to the characteristics of the port and waterway engineering project, the value chain thought and project cost management theory, a system method of project cost management of port and waterway engineering, which is divided into 4 stages including compiling project resource plan and classification WBS, estimating project,compiling baseline plan as well as tracking and correcting deviation,is proposed based on the value chain. The method and the key point of project cost management during each stage based on the value chain are researched and empirical analysis is carried out combining with practical engineering projects.

Abstract:Engineering practice has proved that the super-long pile with axial loads in soft soil area is quite different from the conventional pile foundation in load transfer mechanism. Through static load and pile shaft force test of super-long pile in deep soft soil area, proper pile length estimation formula of super-long pile is deduced according the load-settlement deformation relationship. Using Q-S curve static load test data, the proper pile length of super-long pile is calculated.

Abstract:Ship collision research is always a hot issue in the area of navigational safety or maritime traffic safety. This paper introduces a simulation technology applying ship maneuvering simulator to simulate collision process, which is currently an important technical method used in maritime accident evaluation and analysis. Firstly,using simulation technology, the ship collision process is real-time dynamically simulated and analyzed through ship collision accident analysis software (ship collision analysis system 2.0). The result has important reference value to the driver and the captain, and provides a new way for the maritime security supervisor organization to investigate and deal with ship collision accidents .

Abstract:Aiming at the current situation that the control of concrete cover thickness of hydraulic structure is generally not strict, this paper analyzes the impact of concrete cover thickness on the bearing capacity and durabilityof hydraulic reinforced concrete entities. Meanwhile, through a large number of detection practices, we find out the weaknesses in the control of concrete cover thickness during construction of the hydraulic structure, and propose suggestions on it.

Abstract:For guiding river bank protection energy-saving and type selection considering the whole life cycle of bank protection project, total energy consumptions are composed of the material energy consumption in production stage, transport stage and construction stage. The mathematical statistical models for energy consumption analyses of each part are given in this paper, comparative analysis on four different kinds of bank protection in Changzhou urban waterway realignment project is conducted as well. The result shows that project energy consumption is significantly affected by the form of bank protection. By comparing with the energy consumption of concrete gravity grouting bank protection per meter, the consumption of balance weight type bank protection is 84.2% of that with 107.3% of that for cantilever type and 67.0% of that for cantilever revetment with greening revetment.

Abstract:To counter the problems of Yangtze River ship dangerous goods emergency resources and their own characteristics, taking consideration of the overall relative efficiency of input-output in emergency response resources in the system and making use of data envelopment analysis(DEA) of dangerous goods accident emergency response vessel, this paper evaluates the efficiency of resource allocation, makes the evaluation proceeds with the neural network data for training, and predicts the effect of generating program, so as to obtain the global optimal ship dangerous goods emergency resource allocation optimization program, which can provide a reference for the scientific allocation of dangerous goods emergency resources.

Abstract:Based on the characteristics of Guodian Fuzhou Jiangying Power Plant in hydraulic data,landform, and limitation construction period, we made design innovations on the general layout, wharf structure and handling technology, and guaranteed the timely operation and cut down the cost.

Abstract:The comprehensive development of coastal areas has now risen to national development strategic level, the coastal port construction is carried out rapidly. On the basis of the relationship between ports and hinterland, this paper analyzes many factors which possibly influence Jiangsu coastal port cargo throughput and picks up the most important factors by principal component analysis in the past ten years. This paper also probes into the inherent mechanism of impacts of port throughput, and puts forward a forecast model based on the above mechanisms. Furthermore, this paper applies the model in the test of port throughput in Nanjing port and it provides an effective data support for the new development of Jiangsu coastal ports.

Abstract:This paper analyzes the status quo of the berthing structural type and its characteristics under a large range of stage. Based on the characteristics of port topography and stage variation in the reservoir, it puts forward the new magnetic berthing structure which adapts to the wharf mooring under a large range of stage. It introduces the structure and working mechanism of the structure and discusses the development trend of it, so as to promote the optimization of wharf structures.

Abstract:To accommodate 50 000～70 000 DWT bulk carriers, berths No.2～No.5 of Dagang port district in Zhenjiang port were strengthened. This paper introduces the way of partial innovation by using the existing structure system with additional new piles to build new mooring & berthing points in the design. Practice proves that this design makes full use of the existing wharf resources, saves investments and ensures smooth operation. It may serve as a reference for similar projects.

Abstract:The construction of hydroelectric engineering in navigable rivers can improve the waterway by cascading or canalizing rivers, and promote hydropower development and navigation construction as well. The navigation influences from hydroelectric engineering are discussed, and some countermeasures and research approaches eliminating or reducing the influence are also expounded. The results may serve as a reference for project management, planning and design departments, especially for planning and design departments of noncommunications industries.

Abstract:Laokou navigation hub is one of the important construction projects in Guangxi Xijian River Golden Waterway. The hub around the selected river dam site is located downstream of the confluence between anti-S-shaped river. Navigation conditions and lock arrangement is the key of the overall design. Through the exposition on the construction scale, dam site characteristics, general layout, filling & emptying system, hydraulic structures and features, as well as the metallic structures, this paper briefs the main technical characteristics of the lock, so as to provide a reference for the navigation hub’s lock design.

Abstract:This paper describes the bed evolution characteristics of Dongliu channel in the lower reach of the Yangtze River and analyzes the main influential factors then. It predicts the trend of the bed evolution, and pointis out that although the Donggang channel is in the process of developing, as the cross channel called Xigang is in a shrinking trend, the Xigang channel still has the possibility of recovery. For the main problems at present, in order to accelerate the formation of erosion trends of Xigang channel and improve its navigation conditions, some possible engineering measures have been tested in the fixed bed model. According to the results of the model test, it proposes ideas on the next-step regulation of Dongliu channel.

Abstract:Based on the hydrographic data analysis, 2D modeling and fluvial evolution analysis which are combined to study the main changes of hydrodynamic and features of fluvial evolution, we can get that the water level change is the direct response to the lowering of riverbed in the runoff dominant reaches while it is controlled by the tidal dynamic in the tide affected reaches during the median and lower water level. The tidal change is the response to the lowering of riverbed, deceasing of the bottom slope and increasing of the channel capacity. The velocity change is the response to the water depth and longitudinal slope.

Abstract:In order to solidify engineering effect of the first phrase project of Daijiazhou section fairway regulation and prevent the trend towards unfavorable conditions of the plane shape of the straight channel, so as to create a condition for the overall implementation of the master plan, it is necessary to implement the bankprotection works of the right Daijiazhou island edge. This paper analyzes the bank caving conditions and evolution characteristics of the right Daijiazhou island edge, studies the location and length of bank protection, and determines the principle and goal of the protection works. According to the comparison of water surface profile, flow rate field, flow velocity near the shore, diversion ratio and so on based on the physical model test, it determines the implementation plan of the works.

Abstract:Based on flow mathematical model and mathematical model of ship navigation, a plane 2-D mathematical model of ship navigation manipulation is established, which is under the body-fitted coordinate system based on staggered grid, which is perfect for inland rivers. The flow mathematical model uses the 2-D flow mathematical model which is under the body-fitted coordinate system based on staggered grid, and the ship navigation model uses the combination-type hydrodynamic model. Based on the checking test in still water and regular flow, through the simulation on ship manipulation in complicated flow, we get that the 2-D mathematical model of ship navigation manipulation can basically simulate the ship navigation in complicated flow.

Abstract:Based on a study for the layout of navigation-power junction at Chejiang dam site of Tugutang on Xiangjiang River, we established the orthogonal curve two-dimensional current mathematical model. Firstly the model was verified with the nature current materials, and some parameters were adjusted so that the calculated result by the model was consistent with the real-measured data. Then the emulating navigation-power junction was embedded into this model. By the navigation-power junction simulation model, the typical discharge ways of the junction was simulated, the current distribution characteristics was analyzed, and some parameters relating to navigation including the longitudinal and cross flow in the entrance area of the approach channel and in the approach channel. Finally, the navigation current conditions were evaluated according to the Code for Master Design of Shiplocks (JTJ 305—2001). I revealed the features of less investment and time, abundant fruit and easy scheme optimization of this simulation technique.

Abstract:This paper analyzes the design factors for the ship’s routing system based on the investigation of the design principle, design content and real state of vessel traffic, and discusses the design method and mode for the ship’s routing system in combination with the practice of ship’s routing system of Ningbo-Zhoushan port.

Abstract:Taking Donghai bridge offshore wind farm as the background, this paper firstly calculates the displacement and excess pore pressure of multi-layer non-homogeneous soil based on Biot consolidation theory, and makes a discussion on the effect of wave load on the seabed motion; then, based on the displacement results, this paper obtains the internal forces and deformations of offshore wind turbine monopole by the dynamic p-y method and the support displacement loading method, and compares them with the results without seabed motion. It is illustrated that the seabed motion has appreciable impact on the deformation of pile shaft, therefore, it is recommended to perform the deformation check considering seabed motion.

Abstract:In view of the characteristics of the ultra-soft newly dredged sludge, we invented the surface-layer improvement technology based on the mechanism of vacuum preloading and applied to the soft ground treatment project of reclamation land in Wenzhou. The physical and mechanical properties, particle composition, mineral composition of the sludge are analyzed. The vacuum, settlement and pore pressure were monitored in the process of vacuum preloading. The cone penetration test, sampling by boreholing and flat load test were carried out during unloading. The data show that the reinforcing effect of the soil is ideal to meet the design requirements.

Abstract:It had poor effect to reinforce heavy clay recently reclaimed soil with routine vacuum preloading and surcharge preloading in Dalian port. The straight-line vacuum preloading method was adopted to carry on the laboratory model test for finding a solution. The result was that the drain spacing played a leading role to reinforce heavy clay recently reclaimed soil by straight-line vacuum preloading, through indoor comparison test and comprehensive analysis on different drainage materials and different drain spacings.

Abstract:The non-linear finite element equilibrium equation based on the contact interface is build by the finite element method of sub-structure using cohesion degree of freedom, contact constraint which is dealt with by the augmented Lagrangian multiplier method, and pile-soil interaction effect was calculated by nonlinear numerical calculation. Results show that the general trend of numerical results and the measured results are the same. The introduction of the contact problem can reasonably explain the mechanism of pile-soil interaction effect.

Abstract:This paper introduces a combination of electro-osmotic dewatering with dewatering which is used to reduce the groundwater level. Moreover, and which is implemented together with the dynamic consolidation method. The field observation of groundwater level and the pore water pressure showed that the groundwater level and the pore water pressure dropped fasterly using the electro-osmotic dewatering than that using dewatering. The field test showed that the electro-osmotic dewatering combined with the dynamic consolidation can significantly improve the foundation reinforcement effect.

Abstract:The one-dimensional unconfined compression creep test of Shenzhen bay marine soft clay is carried out by the consolidometer for studying marine soft clay creep property, and soft clay creep model is established. The result shows that Shenzhen soft clay creep deformation is mainly the instantaneous deformation and decay creep deformation. The creep deformation is nonlinear and the more obvious the greater the creep stress, and the higher the stress level, the more significant nonlinear characteristics, the complexer shear creep characteristics. The creep property of Shenzhen soft clay may be well described by the Burgers model, especially the decay creep stage and steady creep stage fit well. The steady creep deformation is significantly affected by the stress level, the greater the performance of the consolidation stress, the greater the steady creep deformation, the longer the standard time. It is revealed that in actual projects, when the load on the soil is big, we must consider the damage to buildings due to the creep deformation.

Abstract:The development of vacuum-surcharging preloading method is briefly introduced. Based on the field monitoring data, the change law of surface settlement, pore water pressure, horizontal displacement and water level by vacuum-surcharging preloading method with time are analyzed. The results show that the vacuumsurcharging preloading method can speed up the rate of foundation settlement and shorten the construction period.The change of the pore water pressure in shallow soil is obvious while in deep soil is slow in the process of vacuumsurcharging preloading. The direction of the horizontal displacement in the process of vacuum preloading turns to the inside of the strengthened area, while in the process of surcharge preloading it turns to the outside of the strengthened area, vacuum-surcharging preloading method reduces horizontal displacement and improves the stability of the foundation.

Abstract:The first phase of terminal project of Huadian Caofeidian Heavy Equipment Manufacturing Base adopts the diaphragm wall as the main structure of the sheet-pile quay, which is rare in China. Caofeidian area is a newly filling landscape near the sea, with the geology of fine sand and silty sand. The construction of the diaphragm wall is influenced by the tide and construction of the trough is difficult of, the hole is easily to collapse, and the requirement to the wall is strict. This article focuses on the key equipment of Huadian Caofeidian quay project, slot division and joint type selection, foundation treatment, guide wall design, mud and mix engineering, trough detection, hoisting of steel cage, concrete pouring, pipe joints, etc., as well as the control methods for some key technologies, which can ensure the quality of the project and may serve as a reference for similar projects.

Abstract:Caofeidian southeast breakwater phase II, the first protecting building of the Caofeidian industrial zone, is not only an important part but also a protection of the industrial zone. Through analyzing the tide and the dynamic topography of the engineering region, it is concluded that the construction of this project has little effect on the Caofeidian groove. The building level for this project is designed as Level I, the structural section is sloping structure, and the breakwater core is the riprap structure. The breakwater structure adopts double mounds: riprap for the sea side and sand bags for the land side, with fill sand in the middle. The closure engineering is the key for the implementation of this project. This article describes the exterior condition for the closure engineering and the closure construction technology.

Abstract:The paper verified the stability of armor blocks for several seawalls within different sections under various conditions of critical wave heights by model experiments. The economic and reasonable style = of seawalls suitable for Shengli Oil Field is fixed by comparing corresponding stability experiments of two different types of armor blocks.