Abstract:In respect of the difference between domestic and foreign physical model tests in characteristic parameters of a mooring ship’s motion response periods, experiments are performed on a 266 000 m3 LNG ship under the function of transverse waves to study the characteristics of the ship’s motion response periods. The results show that a natural period to the ship’s surge motion is 32 s under the ballasted condition; the sway motion is a kind of intermittent periodic growth movement, the ratios of the periods of sway motion and the natural periods of the ship’s roll are between 1.11 and 1.23, which, in general, grow exponentially with the increase of wave periods. The peak values of rolling motion grow with the increase of wave periods. The ratios of rolling motion periods and the mooring ship’s natural rolling periods are between 1.23 and 1.48, which roughly grow exponentially with the increase of wave periods; the natural periods of yaw motions become longer under different loading conditions: 30 s for the ballasted condition, and 32 s for the laden condition.

Abstract:Based on one-year wave observations off the coast, this paper studies the longshore transport rate of sediment and coastline deformation of the gulf by a joint method of formula and wave mathematical model.Calculation results show that the wave dynamic condition and sediment transport direction are changed nearby Haojiang estuary after implement of the project, and as a result, siltation occurs at two ends of the bay to the west of the estuary and erosion in the middle of that; About 5 years later, a sand barrier will form between the coastline and the two islands on the west side.

Abstract:This paper describes the flow & sediment conditions near the site of immersed tunnel of Hong Kong-Zhuhai-Macao bridge, and analyzes the back-silting characteristics and influential factors of the test excavated trench. Using a 2D flow and sediment transport model, this paper analyzes the change of flow due to the engineering implementation and the motion of dredging ship overflowed sediment. The model results show that the flow velocity decreases 40%~60%, the overflowed sediment of 0.005 g/L isolines spread away less than 2 km and distributes at a narrow strip. The overflowed sediments deposit mainly into the trench bottom, and a small part to the side slope. Under a comprehensive consideration of the dredging overflow sediment deposition and natural sediment deposition, and combining with the formula of back-silting, we estimate that the annual average strength of sediment back-silting is 1.3 ~2.8 m/a after the trench excavation .

Abstract:A new technology is proposed based on the hydration heat of concrete. Compared with normal concrete, no matter what kind of pile defects, the release of the heat is on the low side generally in the hydration,setting and hardening process. Mud and other pile defects do not even release heat. Meanwhile, the thermal conductivity of pile defects is poor generally. Concrete hydration heat and the resulting temperature gradient of the large-diameter cast-in-situ piles can be measured accurately, and thus the pile integrity is determined. The technical feasibility has been demonstrated by field trials, which is worth of application and extension based on next thoroughgoing research.

Abstract:Based on the previous research of perforated caisson, further study on wave dissipation performance of perforated caisson with permeable superstructure is carried out through physical modeling, and the reflection coefficient that changed with influencing factors, such as wave steepness, relative caisson width, relative water depth and height of superstructure from water surface and so on, is also analyzed. At the same time, empirical formula on reflection coefficient perforated caisson with permeable superstructure is obtained, which may serve as a reference for the engineering design.

Abstract:Being characterized by digitization, informationization and intelligence, the digital Changjiang is an important support to realize the modernization of Changjiang shipping. With the accelerating pace of the construction of Changjiang waterway digitization, Changjiang ENC has now come into more widespread use.According to the practical experience of version 1.0 Changjiang ENC, this paper elaborates the architecture of CARIS HPD and the construction method of Changjiang ENC source data. Moreover, problems existing in practical production are discussed.

Abstract:According to the study of Markov theory and gray prediction model, a gray Markov model is established to predict the Chongqing water transport freight volume by combining the GM gray model with Markov statetransition matrix. Based on the practical prediction, the prediction accuracy of this model is significantly higher than that of the gray prediction model. Moreover, the 2011—2012 Chongqign city water transport freight volumes are predicted.

Abstract:Waterway-waterway transit modes play an important role in a port’s collection and distribution system. With the construction of Shanghai international shipping center and hub port in Northeast Asia, the sustainable development of Shanghai port proposes a higher requirement for the capacity of waterway-transit collection and distribution of Yangshan deep-water port. By analyzing the status of the collection and distribution system of Yangshan deep-water port, this paper studies the existing waterway-transit collection & distribution patterns and the problems, trying to put forward a series of corresponding measures to improve the waterwaywaterway transit mode for the collection and distribution system of Yangshan deep-water port.

Abstract:Taking the demonstration program of Suizhong Xingang as a study case, we use a 2D numerical model for straight coast to simulate the current field of the filling-type jetty port, and discuss the factors such as plane flow pattern, cross-flow of port and channel, and the impact of construction to surrounding water. The results suggest that the wharf apron is not advisable to protrude too much, the entrance ought to be arranged in the same level as far as possible to avoid complex flow near the entrance and reduce the interaction between them, and large tonnage wharf would be best to be laid in the trestle form to decrease the impact on the surrounding water.

Abstract:With the speeding up of the development along the west coast of the Taiwan Strait economic zone,harbor resources’ layout is being reintegrated and adjusted. The infrastructure construction for energy (such as coal,oil, and container) and logistics is in full swing. The west coast of the strait maintains several ports with good sea conditions such as port of Xinghua bay, port of Meizhou bay, port of Quanzhou and port of Xiamen. Nevertheless,open seas’port becomes the development trend of port engineering in consideration of the large-scale trend of marine transportation vessels. As a result of special water conditions, particular construction requirements are involved in the Taiwan Strait port construction projects. The construction experience and conclusions are presented according to recent years’ EPC contract projects in large crude oil terminals and bulk cargo terminals.

Abstract:Referring to the standard of harbor engineering, the calculation method for the vertical bearing capacity of the open-type steel cylinder pile is not very explicit. So designers often refer the Technical Code for Building Pile Foundations (JGJ 94—2008). We propose a new calculation method for the effect of blockage, which is verified by a practical engineering, so as to solve the problems of the standard JGJ 94—2008 Technical Code for Building Pile Foundations in that it considers only the depth into the bearing course and ignores the blockage effect of the overlying bed.

Abstract:The permeable breakwater has a broad application prospect for its better water permeability,geological adaptability, low cost, relatively easy construction, less environmental impacts, etc. But because it is a new type structure and there is only a few stipulations for it in the current codes, it can’t be a good guide for the permeable breakwater design. Referring to research results both at home and abroad, present codes and engineering experience of similar projects, we present the systematic design of the permeable breakwater. The breakwater of Zhujiajian Yue’ao fishery harbor was designed according to detailed data and function. The designing technique of “ deciding by calculation firstly, selecting by experiment later” was used in the structure design. The experimental result shows that the method for calculating structure’s horizontal force is reasonable.

Abstract:This paper introduces the application of British standards for the design of steel pile and ground anchor in new pier in Singapore, lists general design process and relevant codes. Combining with field test data,this paper presents an optimization of the structural design for the ground anchor. Furthermore, practicable design parameters for ground anchor are proposed for the engineering in Singapore.

Abstract:Frequent ship berthing, management loopholes and some unpreventable factors make the accident of the berthing collision to happen quite often. At present, it is not clear that the force and displacement characteristics of the wharf under the abnormal berthing, making the lack of theoretical basis to damage assessment.A high-pile wharf nonlinear mathematical model is established in ANSYS finite element structural analysis software,in order to carry the test and inspection on-site out contrapuntally. The pile-soil interaction and the impact of rubber fender body buffer is taken into account while this thesis simplifies the structure and hierarchical foundations reasonably. The model results are compared with the actual wharf collision damage. The relative relationship of the extreme collision forces is analyzed briefly and the displacement is compared. The conclusions are got that the model can reflect the wharf damages in this collision case.

Abstract:The reinforcement, repair or upgrade of in-service high-pile wharf structure required structural detection and evaluation. This paper introduces the characteristics of the detection and evaluation, further refines the existing detection and evaluation standards and codes with consideration of wharf’s aging and injury cases, and discusses the flow and method of detection and evaluation of the in-service high-piled wharf, with engineering examples expounded. The research results may serve as a reference for the detection and evaluation of other hydraulic structures.

Abstract:This paper introduces the design of the marine power supply system from berth No.5 to No.9 in the port area. The frequency of the main ships’ power grids at Shekou port is 60 Hz, with two kinds of distribution voltage, i.e. 6.6 kV and 0.44 kV. The power supply system for the shore considers two voltage levels to meet the demands of different vessels. The plan has a high flexibility and a remarkable effect in energy saving and pollution reduction.

Abstract:After the impoundment and navigation of the Three Gorges reservoir, the volume of freight traffic passing through the Three Gorges dam area continues to grow, and the ability is tending saturated. Moreover, the vessels are getting to a tendency of great size and large tonnage, and nearly 50% of the passing ships’ draught exceeds the designed standard. So it is an important matter to excavate under the kneel clearance to raise the passing ships’ draught and boost the volume of the passing ships are the today’s important problems. Combining the theoretical research with the on-board measurements, we carry out a systemic research on the running of the Three Gorges vessels, computing methods of the control standards about the volume and ship draught, on-board measurements of ships passing the lock and the control standards of the sea gauge, and have achieved several innovative achievements.

Abstract:The regulation of the tail water level of Shuikou hydroelectric station will need at least 3.5 years. Based on the arrangement conditions of water level treatment hinge and navigation conditions of the construction reach, through theoretical analysis and model experiment, we propose the navigation guaranteeing measures which combine waterway dredging, reef explosion for barrier clearance with scientific station dispatch. The results indicate that the navigation reliability is lower in the partly time intervals of the two dry seasons, during the construction time of second and fourth stage cofferdam. However, during other construction periods, the navigation reliability is more than 85%. The navigation measures are proposed to ensure the shipping in Minjiang river is unimpeded during construction.

Abstract:This paper presents the on-the-spot investigation and prototype observation data analysis for a new kind of flexible mattress with concrete blocks ballast which is widely used in the Yangtze River. Through the model test, the paper also analyzes the most easily damaged parts and the main failure reasons of the buildings and measures to prevent damage and relevant restoration measures. Taking into account the principle that the body of the central bar should maintain the stability of the shoals and channels, this paper proposes the research approach to determine the width of beach protection belts and the space between them. At the same time, it proposes the measures to optimize the beach protection engineering structures.

Abstract:Since the 1970s, it has been a relatively-stable evolution pattern in the south branch at Changjiang estuary, where the evolution is well regular. The pattern’s formation relates to the boundary conditions of the south branch and the flow and sediment into the south branch. Based on the topographical data and the runoff and sediment characteristics over the years, first of all we expatiate on the evolution regulation of the south branch and the interaction between the sand bodies and the channel; then we analyze the influence from the artificial engineers and the runoff and sediment; and lastly, we generalize the river channel evolution pattern.

Abstract:The upstream reach of the lower Jingjiang stretch of the middle Yangtze River (from Guchangdi to Beimenkou), alternatively the Ouchikou wterway is analyzed based on the field data. Because of the complicated fluvial process, it is necessary to reveal the process mechanisms and present regulation methods. Based on the measured data, this paper analyses the characteristics of fluvial process and reveals the process mechanisms of bars and pools. Through the analysis of waterway condition, the regulation methods are suggested. The results may serve as a reference for future study of the Jingjiang stretch.

Abstract:In order to maintain a more favorable pattern of beach slot at present in Kou’an straight reach of the Yangtze River, Manyusha shoal head protection engineering will be implemented, thus the maximum scour depth surrounding the project need to be studied to determine the width of pressure stone in edge and the key protection parts. The flume series experiments with the scale of 1∶100 and 1∶200 are used to study the local scour depth around beach protection project. The result shows that the depth of maximum local scour will be 6.0 m, which can be applied to the engineering design.

Abstract:Based on the 300 000 DWT channel project of Lianyungang, this paper analyzes the feasibility of the utilization of ADCP walk-propelled method for suspended sediment measurement in muddy coast where the suspended sediment concentration is low, studies the law of diffusion of suspended material, which is caused by the dumping of dredged materials in the main navigation channel in Lianyungang harbor, and its impact on the siltation of the navigation channel in Xuwei harbor, the research result of which may serve as a reference for the improvement of the dredging operation in the 300 000 DWT channel in Lianyungang harbor.

Abstract:Constructing sluices is widely used as an important way of estuarine regulation in China, which will lead to severe siltation downstream estuarine floodgates while promoting the local economic development and limiting the comprehensive use of estuary. This paper describes the siltation downstream sluices and elaborates the silting mechanism and simulation study at home and abroad on this problem. Many factors influencing the siltation pattern are summarized including the tidal current, the length of irrigation channel, dynamic features of estuarine sediment, the types of rivers downstream sluices, location of sluices, etc. The defects existing in the previous study are illustrated and suggestions are given to the direction and methods of future study.

Abstract:Based on the generalized curvilinear coordinates system in plane and sigma coordinate system in vertical direction, a 3D flow numerical model is established. It adopts the control-volume formulation to disperse the basic equations. To avoid pressure oscillations, staggered grids are used. It uses the hydrodynamic pressure correction method to solve the equations. Then the model is validated respectively by the field data in classical sharp curve reach and in the Tugutang physical model. The results show that the proposed model can reasonably simulate 3D flow characteristics in the sharp curve reach, and flow condition in the entrance area of ship lock approach channel. It can be used to study and optimize the general layout scheme of hydro-junction.

Abstract:The innovations in the design of the ship lock engineering of Shanghai International Shipping Service Center project include rational the determination of ship location in a complex environment, the economical filling and emptying system concerned landscaping, the special run process of the ship lock, and the traverse gate of the ship lock with better properties of wave prevention and preventing silt.

Abstract:Locating in the confluence of Qian river and Yu river, and in the fluctuating backwater area of Changzhou hydro-junction as well, Yanglantan beach is characterized by trong currents, chaotic flow, large crossflow and poor navigation conditions. It is very difficult to increase the channel dimensions from class Ⅳ to classⅡ,which would be studied mainly by the physical model. Based on the hydraulic characteristics, four improvement ideas are compared such as channel widening, improvement engineering at the junction in Qian river, excavating at the left branch or in the middle channel of Dasha for diversion. The scheme of excavating out of channel for diversion is advanced. The analysis of measured regulation effect shows that the value and location of large flow field which is predicted by the model test are consistent with the original, and the the channel conditions have been improved significantly by the engineering.

Abstract:In view of the temperature and temperature stress of mass concrete of lock’s hydraulic structure,this paper carries out the whole-course automatic analysis through the secondary development of the finite element software ANSYS, design of visual parameter input interface by the VB language, and combining with the APDL language of the software to simplify the complicated whole-course simulation analysis and enhance its efficiency and practicability, and to better solve practical engineering problems. The paper also involves calculation and analysis of the temperature and temperature stress of a typical docking lock chamber to provide references for technicians.

Abstract:Actual siltation observation of 150 000 DWT channel at Lianyungang port is carried out. Combining with the hydrologic and sediment data, we study siltation characteristics on perennial and windy days and influential factors.It is found that the siltation of 150 000 DWT channels is about 6 070 000 m3 per year, which is similar to the predictive value of the preliminary design phase. The distribution of siltation is similar to that in 70 000 DWT channel, the maximum siltation intensity of about 1.86 m/a locates at the outer section 1. The windy day siltation is characterized by 3 stages’variation and recovery later after primary siltation. The local siltation after wind is temporary, and the siltation needing dredging is very little. Based on the siltation characteristics of 150 000 DWT channel, we suggest that the breakwater at Liandao island entrances should be constructed during construction of the 300 000 DWT channel to reduce siltation at the peak section.

Abstract:This paper introduces the main style and material of regulating structures, and analyzes the type and reason of erosion of regulating structures in Chuanjiang river. On this basis, depending on the channel regulation project of Xuhu reach (Yibin to Luzhou) at the Yangtze River Artery, this paper proposes to carry out a research on the experimental investigation for the use of accropodes for the dam armour. The result shows that the structure has a good effect of stability and energy dissipation, and thus shall be widely used in channel regulating structures.

Abstract:The plan layout and navigable condition in the water diversion project from the Yangtze River to the Hanjiang River are analyzed by a combination of the tidal current physical model test, remote-control selfpropulsive ship model, mathematical model and maneuvering mathematical model. This paper expounds the navigation condition of the junction of the Yangtze River and the water diversion project, downstream channel of Longzhouyuan lock and navigable spans of Jingjiang dyke, analyzes the influential factors of the navigable flow condition in the design, and proposes the optimal layout scheme which satisfies the requirement of safe navigation through taking a variety of engineering measures to improve the navigable floe condition to counter the disadvantages of the design scheme.

Abstract:The surface settlements are uneven after improving the surface-layer of the newly hydraulic mud fill and the named “soil piles” are usually produced. Based on the monitored data of pore water pressure and CPT in the soft foundation treatment engineering, this paper analyzes the formation mechanism of soil piles. It is shown that the soil piles are essentially caused by the uneven settlement between the soil around the plastic drainage plates,and the figure of pile seems to be an inverted cone and the cross section is in shape of ellipse approximately. The depth of piles is less than 1.6 m, and the strength of the soil beneath 1.6 m is more even. In the horizontal direction,the strength of soil decreases as the distance to the plastic drainage plates increases. The research indicates that the numerical results agreed well with the facts observed in the field when considering the variations of the soil parameters with the consolidation process. The advices of avoiding or decreasing soil piles are put forward and the conclusions would be helpful for similar engineerings.

Abstract:The developed capsule car is capable of carrying caissons of 7 000 t or even 10 000 t. Based on the successful practice of this technology in the large-scale projects in Qingdao, this paper introduces the key technology of caisson launching and installation, to serve as a reference for the launching and installation super large caissons.

Abstract:This paper focuses on the construction technology of cast-in-situ bored piles of the main bridge of the Second Penang Bridge of Malaysia. The main bridge of the Second Penang Bridge of Malaysia is a double-tower cable-stayed bridge. Each tower is supported by 21 pieces of φ 230 ~ 200 cm bored piles with a maximum length of 126.9 m. The piles are designed to be socketed into the penetrating weathered rock layer of 8m in depth, and with a maximum bored-hole layer of 133.15m in length. From the construction management on marine bored pile of the Second Penang Bridge, we sum up construction techniques of the equipment selection, drilling, concreting, statistic test of bored pile and others, and accumulate valuable experience for similar pile construction.

Abstract:During the construction of deep-water drilling pile, the deformation of steel sleeve and suspension of concrete casting happens very often, which affect the construction quality of the pile body. Based on the experience of pile foundation treatment in Anzhou Jiajiang bridge and other projects, we optimize the treatment methods for the steel sleeve. Through the underwater cutting processing we solve the deformation problem of the steel sleeve. The pile connection in the sleeve is implemented after theoretical check, and the engineering problems are solved.

Abstract:To solve the problem of pile stabilization in the dock steep slope bare rock area, we carried out routine artificially flattened bed dumping, and the exploratory construction for the catheter frame pile stabilization process. We solved the technical problems such as pile stabilization temporary reinforcement, the construction study of catheter frame technology, and the positioning, ascension, solid, sinking of pile on site, according to different geologic conditions, and provided a referential basis for the pile stabilizing technology under the same kind geologic condition.

Abstract:This paper summarizes the construction technology of large-diameter concrete pipe piles including the prefabrication, maintenance, splicing, transportation, hoisting, and sinking under the special meteorological,hydrologic and geologic conditions of Huanghua port. Because of the fist usage of large-diameter concrete pipe pile in Huanghua port with the highest latitude, more experience can be obtained for similar constructions.