Abstract:The concept of “deepwater breakwater” is discussed based on the experimental studies of stability of minor armor blocks.The primary conclusion is that a breakwater can be called deepwater breakwater while itsH/d＜0.3 and the water depth ≥20 m,and be called shallow water breakwater whileH/d≥0.3.The rationality of the regulations on the stable weights for minor armor blocks in the current code is discussed,and some suggestions are put forward to improve the regulations.Two engineering examples are given,in which weights of minor armor blocks coincide with the research results.

Abstract:The setting velocity is an important parameter for the frictional loss of slurry transportation by pipelines.Several prevalent setting velocity calculation methods for sediment particle,including individual way for different flow regimes proposed by Sun Yubo,Concha’s mode based on the shape factor of particles,Nian-Sheng Cheng’s expression from regression analysis on the relationship between the drag coefficient and Reynolds number,Ahrens’s equation originated from the link between Reynolds number and Archimedes buoyancy index,Wilson’s manner built on the segment of Reynolds number of shearing force,and Weiming Wu’s formula regressed from numerous measured setting velocity of irregular particles are detailed.The calculated results of the example are given and compared with measured data extracted from other journals.Finally,setting velocity formulas are recommended for different requests.

Abstract:Dongshui harbor is located in Dongshui lagoon of Chengmai Bay,Hainan Island.Aiming at the development and construction of deepwater Dongshui harbor,we study the hydrodynamic sediment characteristics of Chengmai bay and Dongshui harbor based on the analysis of natural conditions,beach evolution,suspended sediment movement and coastline change by remote sensing,and numerical modeling of tidal current and sediment.The results show that Dongshui harbor in Chengmai Bay possesses favorable conditions to be constructed into a deep water harbor as far as hydrodynamic sediment conditions are concerned.

Abstract:This paper introduces the calculation method for the mean overtopping stipulated in EurOtop（2007）,which is commonly used abroad,and compares it with those given in the Chinese code,Code of Hydrology for Sea Harbour,and other calculation methods proposed by the Chinese experts.The conclusion that the factors considered in EurOtop is more comprehensive and thus provides more reference value in the seawall designing.

Abstract:In model test,due to the model scale effect and the difference of model sand and natural sand,the time scale for flow and riverbed scouring and silting are inconsistent.Therefore,it is necessary to select different scouring and silting time scales for different tidal flow-sediment models.Researches show that the time scale for the erosion model is different from the one for the deposition model,so does for the tidal reach and runoff reach；when the riverbed evolution is controlled by both tide and runoff,the time scale is determined according to the bed-forming role of the flow；when selecting the scouring and silting time scale of the storm surge,the characteristics of flow and sediment transportation are always considered,and the equal time scale for scouring and silting and flow are generally used,while the sediment volume scale needs to be adjusted accordingly.

Abstract:A numerical wave flume which is developed by directly solving Navier-Stokes equation and κ-ε equation with VOF technique and SMAC method is established to simulate the interaction of wave and coastal structures,especially to study the course of wave propagation on sloping dike.At first,the simulation accuracy of wave flume is verified by analyzing the non-linear wave propagation over a horizontal bed,based on which,the whole course of regular wave propagation on sloping dike is simulated,including the wave run-up and wave overtopping.Then the temporal variation of water elevation at measuring points on the slope and the overtopping rate are validated by experimental data.

Abstract:In the design and construction of ship lifts,the integrated physical model test is an effective means to study and solve hydraulics,machinery,electric,control and many other issues during the operation of ship lifts.Combining the previous research results,this paper respectively conducts the preliminary analyses of the similarity criteria that the model design must meet of ship chamber,balance weight system,tower structure,mechanical synchronous system and other core parts of the wire rope winding vertical lifting ship lift,points out the theoretical conditions and design ideas needed in its full-similar simulation,and mainly puts forward a full-similar simulation method of mechanical synchronous system.Finally,this paper discusses the feasibility and necessity of the ship lift’s full-similar simulation.

Abstract:This research is carried out under the instruction of pump concrete,mixing with recycled coarse aggregate,to get a conclusion from the durability test against the port corrosion environment.The experiment shows that it is possible to improve the durability of C30～C40 concrete after cement is partly replaced by fly-ash and mixed with specified admixture,so as to fulfill the basic requirement of commercial concrete.It could bring a reasonable orientation to use recycled aggregate concrete for civil structure in port environment,and to provide conditions for the sustainable development of economy and environment.

Abstract:More and more Chinese local construction companies enter into the international market and participate in the global competition by contracting overseas projects and the success or failure in performing such overseas projects has a direct bearing on the corporate profit,reputation and even survival.There are a lot of uncertain factors in the international projects,and Chinese construction companies have their own weakness,so,our companies are facing all kinds of risks in contracting international projects.Taking Rehabilitation of Oil Terminal Project in Mauritania for example,this article analyzes the status quo of risk management of overseas projects,explains the contents of risk management and the methods of risk identification,and proposes effective risk management strategies,so as to enhance the sense of risk management among Chinese construction companies and improve their ability in risk identification and assessment.

Abstract:In view of the development trend of exploration platform for domestic and abroad offshore engineering,this paper analyzes the avantages and disadvantages of the jack-up and shipborne II exploration platforms and the research results on them.To breaking through the technical bottleneck of geotechnical engineering’s in-situ test implemented by the shipborne platform,and accelerate the integration of China’s offshore exploration quality with international standards,we carry out a research on the in-situ shipboard platform stability.A new design scheme for the shipboard work platform is presented,which expands the mature in-situ test implemented on the land to the water area.

Abstract:港口项目；社会稳定风险；新方法体系；以问题解决为导向

Abstract:The calculation of anti-overturning stability is an important part in the structure design of gravity caisson wharf.The method of uniform design is used for the sensitivity analysis of anti-overturning stability of gravity caisson type wharfs,which can effectively reduce the test times and improve the test effectiveness.As a case study,the sensitivity analysis of a caisson gravity wharf in Quanzhou is carried out with selecting four factors including the wave height,angle of internal friction of the backfill rubble,gantry crane load on wharf and the width of a caisson.It is found that for common forms of gravity caisson wharf,the angle of internal friction of the backfill rubble and the width of a caisson are the most sensitive factors,while the gantry crane load on wharf and wave height are less sensitive factors.

Abstract:To counter the problems of crack or breakage of high-pile wharf joints structures during operation,we take a high-pile wharf in Zhejiang province as the research object and ANSYS as the FEA tool to optimize the size and type of joints structure with displacement constrained and using the genetic algorithm and get the design parameters of a new joint structure.After modeling and applying force loads of ANSYS,we obtain the result which shows that the new joint has a smaller interaction force between the seam teeth and slots,a smaller elastic-plastic deformation and a smaller lateral dislocation displacements,which can ensure the safety of joints effectively.

Abstract:In allusion to the question of oblique berthing in small vessels,this paper receives the calculation method of ship collision energy in this situation based on British Standard:Maritime Structures-Part 4:Code of practice for design of fendering and mooring systems(BS 6349-4:1994).Taking one inland river wharf in Guangzhou for example,this paper discusses the strength and deformation of the steel cluster pile structure under the action of ship impact force in difference angles.The results show that when the small vessel berths obliquely,its tangential impact force can not be ignored.For the steel cluster pile of this engineering project,the ship’s impact force,the maximum strength and the maximal displacement of pile presents the trend of increasing at first and then reducing accompanied by the ship impact angle,and the most unfavorable impact angle of the ship is almost from 20°~22°.To ensure the application safety of the structure,we suggest to consider adequately the importance of oblique berthing of small ships in similar projects.

Abstract:Many factors influence the permeability of the cylinder-foundation breakwater,such as wave,depth of water,depth of manger board and structure arrangement of cylinder,etc.,which are very complicated.The effect of wave length on the permeability of breakwater is analyzed by two 2D physical model tests.The results may serve as reference for the design of harbor engineering.

Abstract:To counter the problems of the current semi-rigid asphalt pavement applied to the port area under heavy load,combining with the load characteristics of port operations,and referring to the long-life full-depth asphalt pavement which is hotly studied in European and American countries in recent years,the paper studies the applicability of full-depth asphalt pavement applied to port area under heavy load,analyses the application status and application prospects in foreign countries,trying to resolve the current problems of early damage and others of asphalt pavement in the port area.

Abstract:Along with the development of energy-saving and environmental protection of the port,the port has become the research focus of energy-saving.Taking Nanjing port as the research object,we establish the evaluation model of Nanjing port concerning energy saving and emission-reduction based on the analysis of the situation of energy-saving & emission-reduction in Nanjing port and applying the matter element analysis method and the analytic hierarchy process,and get the effect about the evaluation of energy-saving of Nanjing port.According to the conclusion,we put forward the suggestions and measures about energy-saving of Nanjing port.

Abstract:This paper classifies the waterway anchoring area as a supporting of the port,a temporary supporting area of the waterway,a supporting of the river hydraulic structures and a large anchoring area for ship service,explores the functional requirements and planning principles,and puts forward suggestions on the construction implementation,so as to promote the construction of inland waterway anchoring area and speed up the inland waterway’s modernization in Guangdong province.

Abstract:Based on the model test,we measure the dynamic water pressure and fluctuating pressure of spur dikes under different working conditions,and draw the contour maps and scatter plots of water pressure and fluctuating pressure,through which,we get the distribution law of the dynamic water pressure and fluctuating pressure under different water depth,flow and length of dike,and find out the reason for it according to the theoretical analysis.The conclusion is drawn that the dynamic water pressure increases with water depth,flow and length of dike,and the fluctuating pressure decreases with water depth and increases with flow and length of dike.

Abstract:Baishiyao hydropower station is located on the middle reaches of the Beijiang river,downstream near Feilaixia hub,and the flow conditions of the reaches under the dam are very complicated by the influence of backwater.So the physical model is used to study it,and the model is proven to satisfy the similarity requirements through verification.Fluvial process analysis about the reaches is carried out.According to the results of fixed bed model test,a preliminary analysis of waterway stability is made from the regulation line of waterway and flow dynamic axis,the angle between channel axis and the stream thread,change of flow velocity between before and after channel improvement,gradient,as well as transportability of sediments.The amount of dredge-cut siltation is got based on the movable-bed model test.The suggestion is offered to keep the waterway stable.

Abstract:With the development of coastal economy,reclamation has become the main way to deal with the scarcity of land resources.The area of Haizhou bay tidal flat reclamation is large,and it’s close to Linhong estuary.So it may cause siltation in the river upstream,thereby affecting the region’s flood control and drainage.The tidal current field in Haizhou bay and adjacent seas is simulated by MIKE21,and the hydrodynamic changes,before and after the reclamation in the river are analyzed emphatically.Compared to the past,the average velocity of flood tide and ebb tide in the regions near reclamation area decreases,but the hydrodynamics in the river just change a little.The average ebb tide discharge of the feature sections along the river decreases after reclamation,but the magnitude of reduction is not large.The silting thickness in the river caused by reclamation is estimated to be about 2 cm by the analytical mode,which is based on river facies relation of Dou Guoren.It indicates that the reclamation does not have a great impact on siltation in the river downstream of the sluice.

Abstract:Dongliu waterway locates between Jiujiang in Jiangxi province and Anqing in Anhui province.It’s a straight river with multiple branches. The upper part of the waterway is divided into two branches by the Laohutan beach:The left one is called Laohutan north channel, and the right one is Donggang. In recent years, due to the development of Donggang, the condition of Laohutan north channel is gets increasingly bad. Based on the observational data,this paper analyzes the development reason of Donggang channel and points out that the upstream runoff and sediment change after the impoundment and operation of the Three Gorges Reservoir is the most important reason for the development of Donggang chanel,and the waterway regulation engineering implemented promotes the development of Donggang to a certain extent.This paper also predicts the future development of Donggang based on the geological data.The research achievements may serve as reference for the follow-up project ideas and designs of waterway regulation.

Abstract:This paper analyzes the operating status of lock’s miter gates and valves,and introduces the test principle and test methods for miter gates.Based on case studies,this paper discusses the test methods of the miter gate to find out the reasons for the vibration changes of the door and adopts effective measures for the abnormal situation.

Abstract:This paper introduces the cooling water pipe techniques widely used in concrete dams to the temperature controlling methods of lock structures.The study intends to find the temperature cooling effect of cooling water pipes,by laying metal cooling water pipes in one side bottom-board of lock head and making a contrast with corresponding middle bottom-board and side bottom-board which have no such measures.The result proves that cooling water pipes can improve the distribution of temperature field noticeably,and also achieve good results in cutting down the temperature difference in the construction of concrete and decrease the thermal stress very well.

Abstract:Due to the absence of shoreline resources,harbor channel is occupied by the turning area to make use of natural condition.Ship berthing and unberthing has an impact on ship navigation,which leads to traffic capacity reduction.This paper uses discrete event simulation theory to simulate the system which includes ship berthing,departing and navigation.Taking Wusong cruise terminal for example,this paper gives a quantitative analysis to the influence of ship berthing and unberthing at traffic capacity,which can provide reference for planning terminal and coastal line.

Abstract:The information asymmetry between service providers and customers is the main factor in logistics.It is the trend of logistics to improve transparency through information technology and eliminate information asymmetry.This paper describes a logistics tracking and monitoring system based on the satellite interaction.A new prospect of logistics tracking and monitoring will be seen through an integrated application of satellite positioning and communication,mobile internet and RFID technology.The accuracy,reliability and easy operation of the system have been proved through the practical application.

Abstract:Based on the first phase project of 12.5 m deepwater channel of the Yangtze River downstream Nanjing,this paper proposes the design ideas of laying technology for the soft mattress of ultra-short baseline (USBL) underwater positioning system according to the deep depth and large flow velocity conditions.Through the system development and system test,we complete the design and apply it to the actual laying work.We also achieve the laying and positioning visualization of soft mattress in deep depth conditions.The working state of the arrangement ship can be adjusted in real time to ensure the accurate laying of soft mattress.

Abstract:In Egypt Port Said Container Terminal Phase II,pile and diaphragm wall combined wharf structure was successfully applied.When calculating the displacement of the structure under seismic condition,due to the obvious 3D structure feature,a 3D model was adopted to correct the two-dimensional model under a typical case,then the corrected two-dimension model was used in various cases；three typical seismic waves were chosen with two seismic standards,i.e.Level 1 and Level 2,for the dynamic analysis,and the results showed that the structure satisfied the requirement under the case of earthquake.

Abstract:As a structure type of sheet-pile wall,the main pile with inserted sheet structure is composed of some certain members,the force condition of which is relatively complicated.Based on an engineering example,the NL method is utilized to compute lateral bearing capacity.In order to verify the reliability of theoretical method,a 3D pile-soil model is established by ABAQUS finite element analysis software to carry out numerical simulation.It is revealed that most of the load is carried by main pile,for inserted sheet,horizontal bending moment is much larger than the vertical one.Moreover,mechanical properties of the main pile with different inserted sheet size are studied based on ABAQUS,and the moment variation of the main pile is emphatically analyzed with the change of the inserted sheet width,thickness as well as embedded depth.The results indicate that force conditions of the main pile are greatly affected by the inserted sheet width,and the maximum mid-span bending moment of the main pile increases significantly along with the width.While inserted sheet thickness and embedded depth have less influence on the main pile.According to the actual need in engineering,appropriate adjustments can be made for the thickness or embedded depth.

Abstract:Anchored inclined piles are normal structures for sheet piles anchoring.The anchored inclined pile can be divided into two types:standard type and nonstandard type.The standard inclined pile is that the intersection of the piles lies on the bar plain,while the other conditions belong to the nonstandard type.The preset article concentrates on the stress analysis of nonstandard anchored inclined piles and the formulas of the axial and shearing force are derived.Furthermore,the influence of the pile top distance is also analyzed,which may serve as reference for future design of anchored inclined piles.

Abstract:The variation curves and rules of dynamic shear modulus and damping ratio for clay with sand within the shear strain range of 10-6 up to 10-4 are obtained by the resonant column test.The influence of the confining pressure on dynamic shear modulus,damping ratio and the maximum dynamic shear modulus is discussed.The variation rules of the maximum dynamic shear modulus and maximum damping ratio with the gravel content are analyzed.The results show that within the small shear strain (10-6～10-4),the dynamic shear modulus G falls as the augmentation of shear strain γ,and rises with the enhancement of the confining pressure；The damping ratio increases along with the accretion of the shear strain γ；With the increase of gravel content,the maximum dynamic shear modulus enhances,but the maximum damping ratio decreases.The results may serve as reference for similar projects.

Abstract:This paper introduces the application,structural engineering and project benefits of the geo-textile tube cofferdam,the main filling of which are dredged materials of the Dianchi Lake dredging project.A comparison is made with the traditional structure of rolled earth-rock filling in various aspects to introduce the advantages of geo-textile tube technology in the dredging project.

Abstract:To improve the TSHD’s construction productivity and reduce the construction cost,we analyze the TSHD construction data,carry out soil sampling test,and optimize the construction technology of TSHD.The implementation of the new construction technology has increased the construction productivity of Tianjin Port 300 000 DWT waterway by 37%,speeded up the construction progress,and cut down the construction cost.

Abstract:Based on the structure,shape,size and fixing method of the work basket in an anticorrosive construction site of Hong Kong-Zhuhai-Macao bridge,we analyze the support,basket and wire rope as the main force components,and calculate the static stresses in symmetric and asymmetric construction conditions by MIDAS FEM software,to ensure the safety of construction.By studying the swing amplitude of work basket in different wind speeds,loads and pendulum lengths,we get the restrictive condition that there is no harmful collide between the work basket and pier shaft,which provide useful reference for the design and check computation of similar construction.

Abstract:This paper introduces the use of pin roll in the hauling caisson technology on land,which overcomes the disadvantages of low efficiency,high cost and complicated operation of surrounding-rope-method and also the disadvantages of high cost,un-turnover of pre-buried pull nose method.This new method provides an efficient way for hauling caisson and other large prefabricated concrete units on land,which has wide expansion and application space and great practical value.

Abstract:As a mature foundation treatment technology,the bored pile is widely used in the foundation treatment of industrial and civil buildings.With the development of the port,the bored pile is put into use increasingly.At the present stage,the port land is usually newly formed with block stones or backfilling of rocks and earth,which is loose and unconsolidated.Some special construction technologies are taken to ensure the bored piles’ pore-forming successfully.This paper probes into the main technological feature of caisson pile drilling construction on loose land area.

Abstract:For high quality and efficient completion of prefabricated caissons in the temporary caisson precasting yard，to overcome the disadvantages of the traditional caisson bedding craft,like waste of resources,high cost,pollution precast yard,slow construction progress,etc.,we carry out an in-depth investigation on the caisson bedding craft by computational analysis,and innovatively use H-beam and square wooden for bunking the caisson and lifting up caissons by the lifting gas bag to extract square wooden,and the square wooden can be recycled for the next caisson bedding.Practice proves that the technology is reliable,practical,and cost-saving,thus it’s better than the traditional one.