Abstract:The deep-water channel phase II project plays a significant role in the Belt and Road Initiative,and is an important part of comprehensive three-dimensional transport corridors in the Yangtze River economic belt.Mainly for the four reaches which have navigation obstruction,we analyze the characteristics of hydrology-sediment upstream,the flow-sediment distribution and the river evolution process,also study the features of navigation obstruction and the trends of river bed revolution.Afterwards,we propose regulation occasion and key locations of each water reach,as well as the thinking of navigation regulation project.The results offer technical support for the design and construction of channel regulation programs,and provide good experiences for channel regulation of tidal rivers.

Abstract:It lacks the dynamic monitoring for the underwater soft foundation deformation,and it is difficult to be implemented.In order to solve this problem,we carry out the reach on the dynamic monitoring technology for deepwater breakwater soft foundation deformation.We apply the way of layered settlement deformation and parallel shift of deep water level,select the shape by underwater equipment and build up observation platform above water,and optimize the installation,protection,adoption and monitoring for the equipment above water.Thus this technology can develop the dynamic monitoring technology under deep water.It has changed the traditional way of monitoring from on land to be under water.It is not only safe,reliable and accurate in data,but also suitable for large scale deep water monitoring conditions.It has significant meaning to the reference and guidance for similar soft foundation deformation monitoring projects.

Abstract:It is quite essential to calculate wave forces for the design and stability of breakwater.With the aid of physical model test,we study the distribution and influence factors and calculation method of wave trough pressure on the large diameter cylinder breakwater with different spacing under irregular wave,in view of the imperfection of design and calculation method of wave trough pressure on the cylinder breakwater.The results show that the transverse distribution of wave trough pressure on the large diameter cylinder structure is related to the spacing of the cylinder under the action of the waves.The longitudinal distribution appears that wave trough pressure is linearly enhanced and then linearly dropped off with the increase of water depth,and the position of the maximum wave trough pressure arises about the depth of wave height below static water level.The relative spacing,relative depth and wave steepness of the cylinder are great influence on the wave trough pressure on the large diameter cylinder breakwater with different spacing.The wave trough pressure calculation formula of the cylinder breakwater is provided with the reduction coefficient on the basis of the theoretical wave trough pressure formula of the vertical wall structure.

Abstract:The formation mechanism and significance of ship-generated waves are expounded.Based on engineering cases,the ship-generated wave force on moored ships and tension of mooring lines are calculated by software OPTIMOOR,and the four influence factors of ship-generated waves on moored ships are concluded.It suggests that the tension of mooring lines rises with the increase of the navigational speed and displacement tonnage,and it declines with the increase of the transverse distance and water depth.Thus proper vessel pilotage and efficient control of above influence factors are necessary for safe operation.

Abstract:This study proposes a new perforated structure with wave dissipating ability which can be enhanced by changing the structure inside.A series of up-slope plates or down-slope plates were installed behind the openings of the front wall and several holes above the bottom are kept as discharge holes.With these sloping plates,the intruding waves may be forced to change directions of their motions,and running-up-like motions will happen in up-slope plates.Using the down-slope plates,the wave’s water particle movement is induced downward,then affects the structure of its fluctuation,thus affects the reflected wave energy.We also set a short slit caisson for comparison.By means of hydraulic model test,it is found that changing wave intrusion into multi-pore structure can help reduce the reflection wave.The related experiments can help further improve the new structure and can be used as a new way to reduce the fluctuation of the harbor by using the dissipative wharf structure.

Abstract:Aiming at the problem of inadequate detection method of the plastic drainage belt in the deepwater area of the Yangtze estuary,we propose a new method of underwater acoustic imaging detection,by which we realize the visualization and measurement of underwater drainage belt adopting the high-resolution side-scan sonar system and DIDSON (dual-frequency identification sonar),obtain the clear image of the underwater drainage belt,and realize the quantitative detection of the plastic drainage belt by the DIDSON using a fixed-point full loop imaging mode.The new method makes up the insufficiency of the existing detection means,and can be used as an important supplement to the existing detection methods.

Abstract:Ocean data is a multi-scale dynamic signal representation,with strong instability and non-linearity.As a new development time-frequency analysis method,Hilbert-Huang transform (HHT),by virtue of well behavior in nonlinear and instability analysis,plays an important role in many fields.The end effect is the difficult problem in the HHT.In the cubic spline,“flying wing” phenomenon will pollute the internal data,resulting in a large amount of data distortion.Therefore,we propose a new approach which is called five-points-symmetry extending.Simulation results show that improved HHT method has better performance in analyzing harmonics to traditional HHT method which provides theoretical and practical significance for the wave signal processing.

Abstract:Due to the influence of tide and topography,the accuracy and reliability of synchronized hydrometry are greatly limited in broad tidal river reach.In order to obtain higher precision to make the data of synchronous observation and time series good comparability,it is necessary to establish high-precision plane datum,elevation datum and velocity datum.Theory and practice show that it is an effective way which can carry out three dimensional depth measurement based on the RTK technology and flow measurement based on the velocity reference of GNSS RTK through establishment of a wide range of high precision GNSS control network.

Abstract:In order to reduce the quarry-run quantities of traditional sloping riprap,a research about deep water sand-core breakwater has been conducted.Based on the optimization design process of the cross section of sand-core breakwater in a practical engineering project,a comparative analysis has been adopted among design section selection,construction feasibility,cost and overall stability under high tidal range.The results show that the sand-core breakwater sections with rock bund can fulfill the project design requirements under the high tidal range conditions,and the conclusion can provide a reference for the similar projects.

Abstract:The bucket-based structure is successfully applied to the breakwater construction.In order to discuss the possibility of this structure to be applied in wider construction field,we analyze the data of unilateral riprap loading monitoring to the east breakwater project in Xuwei,Lianyungan Port,conclude the horizontal movements,rotary motions,internal forces,surrounding soil pressures and soil parameter variation regularity of bucket-based structure under unilateral riprap loading condition,and validate that the bucket-based structure can be applied and popularized in port structures which mainly bear horizontal forces such as revetment and cofferdam.

Abstract:Taking a certain wharf project for example,the transverse bent is considered by the flexible pile platform,the actual structure diagram is simplified and the simplified calculation diagram is obtianed.Based on the m method and hypothetical embedded point method，we use fixed end constraint modeling and elastic build-in modeling respectively to simulate the pile-soil interaction.Two kinds of finite element model are established based on ANSYS to calculate the internal force and deformation of the transverse bent frame under the horizontal force.Finally,SPSS statistical analysis is carried out on the calculation results.The results show that when the significant level α is taken as 0.05,there is little difference of influence on the internal force and deformation of the transverse bent frame under the horizontal force when using m method and hypothetical embedding method to calculate the pile-soil interaction.

Abstract:This paper has discussed difficult construction and other issues in the reinforcement scheme for traditional high-piled pier wharf,and puts forward a new scheme in which a flexible structure is constructed in front of the pier to bear additional loads.The advantages and disadvantages and adaptability of this new scheme with flexible clustered fender piles in front the pier have been analyzed from aspects of safety,applicability,economy and construction convenience.

Abstract:In view that marine products are characterized by large size,great weight,and high technical requirements in shipment,we probe into the characteristics of marine products,transportation technology,and transportation wharf structure based on the practical engineering.Through analysis and comparison,we obtain the technology of shipment port,summarize characteristics of the drilling platform in deep & shallow water,the status quo and the selection principle of ship transportation,and expound main characteristics of three kinds of slip transportation systems and corresponding typical wharf structures.By Comparing the process systems and structure plans from multiple angles,we propose the applicable conditions of various schemes to providing safe,applicable and demonstrative technical methods for the design and construction of the marine terminal.

Abstract:The paper analyzes the layout,intelligence control and working procedure in the mechanical automated stereo garage project of Shanghai Waigaoqiao Port phase VI project which influence the overall planning and design of the mechanical automated stereo garage,probes into the automated control system of the process system and process automated control system of the garage,and puts forward design ideas and strategies for the mechanical automated stereo garage,could be a practical reference to the field of mechanical automated garage.

Abstract:During the flood season in 2016,the Yangtze River had caused floods in the whole basin,and the 12.5 m deepwater channel regulation project phase II downstream of Nanjing had been suspended as required for environmental protection purposes,during which abnormal scouring occurred in the submerged dike area at the head of Shuangjiansha in the Yangtze River.Using flow mathematical model and theoretically analytical methods,we simulate the flow field and regime of the construction area on various water conditions during different execution stages of the project,and find the reasons for the abnormal scouring arising within and out of the limits of the bottom protection,which will give new insights into the design of mattress for bottom protection.We further discuss new jobs that designers,owners,contractors,and all the other parties concerned may encounter owning to the ecological requirement for construction suspension,which can be used as a reference for similar large-scaled inland channel regulation projects.

Abstract:With building of regulating structure in Luocheng Shoal,the flow field distribution will be changed in this area,and it can have some effect on the navigation and berthing of ships.We apply the computational fluid dynamics software to simulate the flow field distribution of the area in this paper.The results show that the regulating structure can effectively prevent the erosion of the flow on Luocheng Shoal,and make the channel more stable.However,the water velocity of Zhenjiang dangerous chemicals anchorage will obviously increased,and the anchorage is located in the left branch channel of Luocheng Shoal.Especially in flood season,adverse affect of berthing will be produced because of the changes of flow field.So it is very necessary to monitor the flow field and manage the berthing ships.

Abstract:In view of the bottleneck problem of the lock and dam,this paper summarizes the main key technologies and innovative design of the construction of the ship lock expansion and reconstruction project which includes the general layout involving the retaining of the existing ship lock and the construction of a new large scale ship lock,the design of lock structure,the connecting water system of the new old locks,strengthening of old ship lock,construction cofferdam under the dam etc.The project can not only meet the navigation safety requirement,but also avoid the adverse impact on dam safety,flood prevention and power generation.And it has a typical demonstration effect to solve the navigation obstruction problems in many of our country’shubs.

Abstract:The factor of runoff and sediment changes of the Yangtze River is numerous,and influence from human activities to water and sediment movement is becoming more and more obvious besides natural factors.Runoff and sediment changes of the Yangtze estuary are influenced by natural and human activities.Comparing and analyzing the runoff and sediment discharge of Xuliujing station and Datong station,we know that Datong station can be used as the control station of the Yangtze estuary.Based on the hydrological data of Datong station,this paper analyzes the variation of runoff,sediment discharge and suspended sediment particle size in the the Yangtze estuary during 1950—2011,and obtains the runoff,sediment discharge and sediment diameter of the Yangtze estuary.The results show that there is no trend change of runoff in the Yangtze River basin.After 2003,the Three Gorges reservoir plays a regulating role,and the distribution of runoff during the year shows the decrease in the flood season and the increase in the dry season.Since 1986,the sediment discharge in the Yangtze River basin has been greatly reduced.The seasonal variation proportion generally shows that it’s decreasing in the flood season and increasing in the dry season.After the impoundment of the Three Gorges reservoir in 2003,the sediment discharge has been further reduced and during flood season sediment discharge is decreasing obviously.The average suspended sediment particle size in Datong station is not obvious before and after 2003,and the grain size is slightly coarser from grain size component.

Abstract:In view of the complex problems of the structure and stress of the lower lock head of Dongfei River,the displacement and stress field under different working conditions are analyzed by 3-d nonlinear finite element ABAQUS software.Calculation results show that using three dimensional finite element analysis software for complex structure has more advantages than in the past the traditional two-dimensional graphic calculation analysis method,the horizontal displacement and vertical displacement of lower lock head of Dongfei River can satisfy the requirements of specification.The results of three-dimensional finite element analysis can be more intuitive and accurate to reflect the overall strength and displacement of the lower lock head,which can provide a basis for evaluating the security state of the structure.

Abstract:According to the current design field of high-head mixed chamber structure,taking the chamber wall of Liujiang Honghua Water Conservancy project as an example,we study the calculation method of anchor bar by combining with the finite element model of ADINA.The axial deformation of the anchor bar during tension is approximately proportional to the distance from the toe through the analysis of the ADINA finite element model,and we establish formula relation among axial tension of anchor bar,moment of anchor bar and the distance from the toe by the relationship between the axial deformation and the distance from the toe.To meet the requirement of stability against overturning in the chamber wall maintenance condition,according to the moment value of anchor bar,we derive the tension value.The tensile value of the anchor bar meets the design and application requirements,and the role of anchor bar becomes greater with the closer of the top row.The calculation method is relatively reasonable,accurate and more economical by comparing with existing methods of traditional anchor reinforcement.

Abstract:In the debugging process of the prestressed tie rod,the torsion deflection of miter gate that sets pontoon will change before and after the drainage.According to the structure characteristics of miter gate,it regards the diagonal pillar as approximate rigid body.Based on similar triangle law,this paper gets calculation formula of overall deflection deducted by local deflection and corrects respectively by straight and broken line fitting method.Combined with the engineering example,this paper verifies and analyzes the deformation characteristics of miter gate through ANSYS finite element software.The results show that the similar triangle law is generally applicable to miter gate’s torsion deflection control,and can provide a solution for the debugging process of the prestressed tie rod.

Abstract:Cross flow in waterway bifurcation region is unfavorable to the safety of ship navigation,thus influencing factors of flow field in bifurcation region require deep-going research.Using hydrodynamic mathematical model，based on the two-dimensional depth-averaged Saint Venant equation,distribution characteristics of cross flow fields during the orthogonal distributary were studied,and influences of the flow diversion ratio and the split width ratio on cross flow fields distribution were analyzed.The result indicates cross flow fields of waterway bifurcation region shows the distribution characteristics as follows:the closer away from the outlet is,the greater the cross velocity is and the denser the distribution is;the farther away from the diversion port is,the smaller the cross velocity is and the more sparse the distribution is.There is a good logarithmic relationship between the velocity ratio and the width ratio.With the increase of flow diversion ratio,the width of cross flow increases gradually.With the increase of split width ratio,the width of cross flow decreases gradually.

Abstract:This paper mainly explores the navigable long-term level of Fanshi waterway required for the Shenzhen-Zhongshan Passageway crossing the Pearl River Project (hereinafter referred to as “S-Z Passageway”) in order to avoid the influence of the S-Z Passageway on the safety and smoothness of the navigation of vessels on both sides of the Pearl River estuary.The paper comprehensively considers the current navigable condition of the Pearl River estuary and the long-term ports planning,and puts forward the necessity of reserving the navigable grade of 100,000-ton class for Fanshi waterway.Using numerical simulation and comprehensive geophysical prospecting,we analyze and demonstrate the deep trough stability of Fanshi waterway,water flow conditions,channel dredging and channel maintenance.At the same time,compared with the typical large-scale domestic ports,we clarifies the scale of the port throughput requirements for channel resources,and put forward the factors which should be considered in demonstration of the long-term level of Fanshi waterway.We think that it is necessary and feasible for Fanshi waterway to reserve channel level of 100,000-ton class.

Abstract:The overall fixed-bed model is established to study navigation condition of downstream approach channel and entrance area of Wacun hydro-junction to get good flow condition for navigation.According to the model test result:affected by water diffusion from power station tail and free jet from right bank slope of tail water outlet,the flow condition in downstream approach channel and entrance area with poorer flow regime and excessive amounts of longitudinal velocity and lateral velocity do not meet the requirements for ship safety navigation.This paper discusses the influence of engineering measures on water flow conditions,such as extending the length of the navigation wall,expanding the slope of the right bank,and adding the other piers.The recommended scheme determined by the comparison and optimization of model schemes solved the problem of larger cross flow in the entrance area well.The navigation flow conditions of downstream approach channel and entrance area meet the requirements of safe navigation for the ship.

Abstract:Aiming at the integration of multi-source measurement data in waterway engineering,an integrated method based on BIM technology is proposed.Through technical route design and engineering case analysis,the concrete implementation steps of BIM technology in multi-source data integration of waterway engineering are expounded.Taking a waterway regulation engineering in the downstream of the Yangtze river,we probe into the method of multi-source data integration,and conclude that the BIM technique has advantages and can provide reference for the construction of the digital waterway.

Abstract:Based on an engineering project of the container port,we adopt the 3D software such as inventor and revit to explore the application of BIM technology in the design of the ground marking system in the container port.Through an exposition of the design process and a comparative analysis of the output results by the BIM technology and traditional design method,we point out the advantages of the BIM design method and provide a new 3D design method and corresponding technological route for the detailed design of ground marking system in the container port,and thus to improve the insufficient of traditional design method.

Abstract:Based on the supply chain management in China and abroad and actuality of port business in Hebei port group,the current problems of port coal supply chain operation and management are analyzed.Focusing on the coal supply chain pattern formation process of Hebei port group,we analyze the port’[KG-*3]s coal supply chain management process,to accomplish the construction of Hebei port group supply chain management mode,logistics cooperation mode,as well as the logistics system and logistics supply chain collaborative information supporting mode,to solve the problems such as the delay of information sharing and poor circulation of information of the port’s coal supply chain.We also design the overall framework of collaborative operation information system of the coal supply chain in port,and discuss the construction of the information system of supply chain collaborative operation based on typical platform construction to form an efficient,scientific and advanced coal supply chain management model of Hebei port group.

Abstract:With the advantages of high bearing capacity and small settlement,the socketed piles are widely used in basic structures.However,due to the complexity of geological conditions,the diversity of construction process and the difference of industry requirements,the vertical bearing capacity of different calculation methods is very different.Based on the collected 193 groups of socketed piles static load test data,the applicability of the existing prediction method of ultimate lateral resistance and ultimate end resistance is analyzed,respectively,different types of rock ultimate lateral resistance,ultimate end resistance and the relationship between unconfined compressive strength of rock mass is set up.Based on this,the proposed calculation method of vertical bearing capacity of socketed piles is given,and the feasibility of the proposed method is verified with the measured data,and the results are compared with the current standard method.The results show that the ultimate bearing capacity is overestimated by general standard methods for hard rock,which is dangerous for engineering design.The calculation method in this paper is recommended.

Abstract:The shear dilatancy is one of the important features of soil.However,it has been overestimated by the classic plastic mechanics,thereby causing the deviation of soil strength from practice.We modify the shear strength parameters of Mohr-Coulomb criterion by the using of equivalent internal friction angle,which reflects the influence of dilatancy on soil strength.Based on the failure mechanism with a logarithmic spiral shape,we use the equations to calculate the internal dissipation,derive external work of slopes,and establish a method to evaluate the safety factor of slop by the theories of limit analysis and of strength reduction.The results show that the results computed by numerical modeling test are reasonable.The safety factor increases more slowly with the increasing of the dilatancy angle,and the trend is non-linear.The recommendations of the values of dilatancy angle are given in practice work.

Abstract:The prediction of the load capacity of single pile in the costal reclamation area is significant,especially at the preliminary design stage for the reclamation project.In this paper,we study the variations of vertical and horizontal ultimate load capacity of single pile with different consolidation degree of soil.Based on one reclamation project dealing with soft soil foundation under sluice,we analyze the relations of shear strength indexes and compression modulus of soft soil with consolidation degree,and use the geotechnical professional finite element software MIDASGTS NX to establish the soil-pile interaction model.Through the reasonable values of compression modulus,shear strength indexes and soil-pile interaction parameters,the vertical and horizontal load capacity of single pile can be predicted effectively under different consolidation degree.The results show that at consolidation degree of 80%,the vertical and horizontal load capacity of single pile are respectively about 1.8 times and 1.7 times higher than that at original state without consolidation.The load capacity of single pile is greatly increased with the consolidation of the soil around the pile.

Abstract:The alternation of hydraulic gradients and high tidal range in the intertidal zone leads to the bad effect of foundation vacuum preloading,so we probe into the process optimization in fields of driving of the plastic drainage plate,and construction of the lateral sealing system and vacuum system.Verifying by the whole construction process monitoring,we obtain some positive results.The results show that the effect of vacuum preloading can be improved by adjusting the filter spacing of horizontal drainage system and adding double row sludge mixing pile as lateral sealing wall and adjusting the layout of vacuum pump.

Abstract:Because vertical deformation of reclaimed soil compression rate is difficult to accurately forecast,relying on a large number of large area in Tianjin region reclaimed land ground treatment engineering,we obtain corresponding reclaimed soil compression ratio by calculatiing settlement of vacuum preloading foundation treatment monitoring data.The soil compression ratio,the weighted average of the volume of the soil in situ and physical mechanical parameters are analyzed in multiple regression.The mathematical model formula for predicting the reclaimed soil compression rate formula according to the in-situ soil dredged soil level and four main associated physical mechanics parameters is obtained.The effective prediction of vacuum prepressure volume compression in Tianjin area is realized.

Abstract:The weak sandwich formed in the process of blowing sand reclamation in the coral sand foundation construction site has a poor engineering performance and leads to a low bearing capacity and large settlement of coral sand foundation.According to the research on soil property based on the physical experiment,we use four different technological parameters of vibroflotation compaction construction method.Results show that process three effects best.Therefore,arranging reasonably the vibrators and choosing coarser filler for the back-fill replacement can make the soft powder denser and improve the coral sand foundation’s bearing capacity significantly,and eventually meet the design requirements.

Abstract:The application and principle of vibro-compaction has been widely introduced in many domestic and international projects,while the comparison of spacing design principle for vibro-compaction among domestic and international standards has not been seen commonly in previous literature.We select the four standards comprising C573 of BS CIRIA standard,specification for ground treatment of BS ICE standard,soil dynamic and special design aspects of American NAVFAC standard and Chinese code for soil foundation of port engineering for comparison.In accordance with comparison result,it can be concluded that the BS CIRIA standard and American NAVFAC standard provide specified design tables which ares more practical,while for BS ICE standard and Chinese code only provide general requirements or spacing ranges.Further,the four design methods have been applied in Kuwait LNGI project in order to analyze the differences of spacing obtaining from different standards under the same density requirement.Therefore,it can provide significantly reference for domestic standard revision or ground improvement regarding vibro-compaction.

Abstract:In the process of vacuum preloading consolidation of soft soil foundation,because of the hydraulic fill mud spread and deposit complicatedly,drainage plate and mud layer at the bottom of the shallow foundation reinforcement area between the friction force is too small,resulting in soil entrainment,lead to “returning belt” phenomenon.Through the mechanical balance calculation and engineering practice,we take vibration,water injection and shoe transformation method to change the drainage plate bottom plate head structure or increase load measures,effectively solve the construction brought back the phenomenon of zone of plastic drainage plate shallow foundation.The measures can improve the plastic drainage plate design quality and efficiency.

Abstract:To counter the problem of channel revetment deformation due to swell-shrinking of expansive soil,we probe into the countermeasures.Appling a combined revetment structure,i.e.,multi-grade slope+backfill of improved soil+surface water drainage+pile foundation,to a channel engineering,we achieve the engineering effect of no deformation and no crack. It proves that such combined structure does resist swell-shrinking of expansive soil and is suitable for the key channel part with bridge or other crossing structures.

Abstract:In view that the strong ground vibration produced by dynamic compaction construction has adverse effects on the people nearby and the environment and the cost of the use of continuous barrier vibration isolation is high,we carry out dynamic compaction test and sand-gravel pile vibration isolation test to study the influences of sand-gravel pile materials and pile spacing on the vibration isolation effect.The results show that sand-gravel pile barrier provides a significant vibration isolation effect on the dynamic compaction,and the vibration isolation effect is enhanced with the decrease of pile spacing.

Abstract:In the revetment project of large diameter steel cylinder structure,it’s important to select the specifications of floating cranes during construction preparation,which directly affects the safety,quality and progress of the construction.Taking a large-scale artificial island project as an example,we describe the selection process,mooring layout,anchoring method,vibration sinking and one-shift costs of the revolving floating crane in detail.Compared with fixed derrick floating cranes,revolving floating cranes have advantages in large diameter steel cylinder vibration-sinking construction:1)Ships responsible for vibration hammers placing are not needed.2)Floating cranes won’t move frequently during hoisting and vibration sinking,which reduces risk as well as increases efficiency.3)It is beneficial to the positioning and deviation rectification of steel cylinders.