Abstract:The submerged breakwater intended to be built in the north branch of Hechangzhou waterway located at deep water with more than 40 m depth and high local velocity,which makes the construction of the submerged breakwater difficult.Based on a three-dimensional hydrodynamic model,we analyze the changes of hydrodynamic structures in different stages of “gradually raise” construction sequence.The results show that surface slope of local water near submerged breakwater during the construction process is up to 3‰.With the advancement of the construction process,the main flow velocity and velocity gradient of deep water area are increasing gradually.Especially in the range of 30 m in front of the breakwater,the maximum vertical mean velocity and surface velocity are 1.85 m/s and 2.1 m/s respectively.The results can be used to provide reference for the adjustment of construction measures caused by local hydrodynamic changes during the construction of submerged breakwater in deep water,so as to improve the construction accuracy.

Abstract:The general construction technology of bed leveling is rails-scraping method.Research on automated bed leveling system underwater by floating intelligent control is blank.This project exploited a combination of theoretical analysis,system design,process test and other means of combining the development of positioning,riprapping，rubble-bedding leveling construction,detecting technology,coming to be the construction method of underwater bed leveling by floating intelligent control.This method has enriched the construction technology of deep water hollow composite breakwater,and will provide an important reference for leveling construction project of underwater bed leveling with small amount of construction on the similar condition.

Abstract:Based on the quantitative calculation results and the measured data,the influence factors and quality control methods of the offshore water-level measurement using pressure sensor gauge in estuarine and coastal area are analyzed.It can provide theoretical guidance and reference for offshore water level measurement using pressure sensor gauge in estuarine and coastal area with complex and varied water temperature,salinity,suspended sediment concentration and so on.The results show that:1)Errors of the offshore water-level measurement using pressure sensor gauge mainly caused by the aging of the pressure sensor,the variation of the water’s temperature,salinity and suspended sediment concentration,inaccurate estimates of the gravity acceleration,bed-sitting frame instability and etc.Among them,the variation of water density caused by variations of water temperature,salinity,suspended sediment concentration and the bed-sitting frame instability are the most important error sources to the offshore water-level measurement using pressure sensor gauge in estuarine and coastal area.2)Feasible quality control methods of the offshore water-level measurement using pressure sensor gauge in estuarine and coastal area include:①verifying and calibrating the pressure sensor’s piezoelectric conversion data periodically;②in advance testing all the pressure sensor in a same indoor environment for several hours,and refusing to use the ones that air pressure test value are significantly different from the majority ones;③simultaneously measuring the surface air pressure of the measuring station;④deploying the pressure sensor as shallow as possible,and simultaneously measuring the water temperature,salinity and suspended sediment concentration at the measuring station;⑤estimating gravity acceleration based on the actual latitude of the survey area;⑥enhancing the stability of the bed-sitting frame,and dynamically measuring the pressure sensor measurement datum.

Abstract:For the structures of submerged breakwater which are widely used in practical engineering,this paper studies the interaction between wave and permeable submerged breakwater under regular waves through a series of sectional model tests.The relationships between the transmission coefficient of submerged breakwater and dimensionless factors are discussed.These factors include the ratio of submergence depth to wave height RC/H,the ratio of wave height to the square of wave period H/(gT2),the ratio of crest width to wavelength B/L,the ratio of the grain diameter of core material to wave height D/H and the slope of submerged breakwater m.Then the improved empirical formulas on the basis of previous researches are proposed to provide theory reference for the design of submerged breakwater.

Abstract:Following the national strategy of ecological civilization,the environmental compensation artificial beaches construction at coastal harbor shoreline is beneficial for the integrative growth of the harbor and city.Focusing on the theory and technology of the artificial beach engineering,we have made a series of achievements through self-development,including development of the beach morphodynamic theory especially under the coexistence of sand and mud,creation of the innovative numerical and physical modeling technologies,propose of the designing principle for beaches under different sediment environment,and development of a series of regulation scenarios for preventing beach erosion and siltation.The above technologies have been successfully applied to a series of practical beach engineering cases,and obtained significant economic,social and environmental benefits.

Abstract:The study of overtopping is of great importance to the design of sloping dikes.Through the physical model test,the influence of wave height,wave steepness and superelevation of embankment on the wave length of slope is studied and the effect of four different types of protection surface is compared.The results of the test show that:the overtopping of sloping dike decreases with the decrease of effective wave height and the increase of wave steepness;the wave of the slope increases with the rise of the top of the embankment and decreases exponentially;the protection form has certain influence on the wave length of the slope dike,and the effect of wave elimination between the accoropode and the barrier plate is not very different,and both are better than the four corners.Comparing the result of the physical model test and that calculated by the exiting formulas about the overtopping volume,Chen Guo-ping’s formula is recommended as the calculation formula for the wave overtopping on sloping dikes.

Abstract:The yard of a port project in Kenya requires high-compressive-strength CBGM.Since the compressive strength of cement bound material is generally low in China,the mix ratio is difficult to satisfy the technical specifications.Therefore,we analyze the influence of skeleton structure on material strength from the aspect of aggregate grading through a large amount of tests and design the proper mix ratio of CBGM which satisfies the technical requirements.It is known from summarization of laws for multiple groups of mix ratios that CBGM of skeletal dense structure has higher compressive strength.

Abstract:Compared with foreign countries’seismic design of slope,there are significant differences in Chinese design concept and design method.Therefore,it is difficult for the designers to adapt to the seismic design requirements of overseas projects,which greatly restricts the smooth implementation of overseas projects.We have collected and summarized the process and specific operation methods of quay slope seismic design in American standard,mainly have introduced the liquefaction evaluation,quasi-static method,the undrained residual strength(Sr)and Newmark method.We provide a case of seismic design of the slope according to the American seismic standard,which can provide reference for future seismic slope design of foreign project.

Abstract:Gravity quay wall is a kind of commonly used wharf structure.How to effectively control the post-construction settlement of gravity quay wall is very important to ensure the quality of wharf construction.This paper introduces the differences between the Chinese and English standard in the settlement control of gravity wharf.Taking Phase IV project at the port of Saudi Arabia as an example,this paper presents a method of gravity wharf settlement control based on the combination of the Chinese and English standard.The theoretical calculation based on finite element method and field observation test are carried out,which agree well with the field observation data.Settlement control method for gravity quay wall based on combination of the Chinese and British standard can guarantee the construction quality and shorten the construction period,and has good implementation.

Abstract:According to the complicated natural conditions,complex navigation environment and typical mountainous terrain construction conditions,we analyze the main factors and technical problems concerning the general layout of a port area on the upper Yangtze River and propose a reasonable arrangement scheme for the wharf,which solves the problem of hydraulic structure and handling technology design of large range of stage.Through the concept innovation and technological innovation,we propose the double“C”type 12 m heavy vehicle spacing of two-fulcrum double-car dumper,and successfully adopt the optimization plan of land saving,such as the combination of windbreak foundation and pipeline belt and the drain inside the track foundation,so as to give full play to the value of land reclamation on the upper reaches.

Abstract:With the tendency of large-size ro-ro ship,the “T” type of plane layout in wharf cannot appease the current development needs.Therefore,we put forward the layout plan of “L” wharf.According to the features of plane design of this kind of wharf,we analyze transportation equipment selection,plane transportation simulation and determination of top elevation of wharf in design of a certain wharf,and consider that the “L” plane layout can be applied to the design of large and medium-sized ro-ro terminal.Relevant design experience can be used for reference.

Abstract:A slope seawall project is near a bridge,and may have a negative impact on the bridge.We analyze two typical sections of excavation and cement mixing pile by a three-dimensional finite element model established by Plaxis 3D,and obtain the maximum displacement results of bridge pile foundation.The results show that the horizontal displacement of the bridge pile is much larger than the vertical displacement.The horizontal displacement of the cement pile is smaller than that of the cement mixing pile.The displacements of two typical sections are both less than 5 mm requirements.

Abstract:Yangshan Deepwater Port phase IV project of Shanghai International Shipping Center is positioned in automated container terminal,its AGV navigation system is based on transponder technique.Combined with engineering practice,the paper focuses on the positioning method of transponder for navigation system，and an analytical method of static control under large range conditions is proposed.The positioning uses GPS static control and total station polar coordinates,which is proved to be able to meet the precision of transponder installation for AGV navigation by analysis and calculation.

Abstract:In order to mitigate the influence of the project construction inside or outside the reclamation area and meet the requirements of urbanization development,a sluice on the breaking seawall is often demanded.Anti-seepage and anti-wave are two major difficulties in the construction of open breaking seawall.Based on research results at home and abroad and similar engineering practice experience,and taking a sluice on the breaking seawall in Zhejiang for example,we describe the design process of anti-seepage and anti-wave on the filling with rubble stones.According to the comparison among similar sluices,we know that the measures adopted are reasonable.

Abstract:The hydro-junction for water diversion project located at branch entrance of the lower tidal reach usually faces flow condition problem through sluice gate.Due to limited land conditions,the hydro-junction has to be built closed to the main river outside the branch entrance and keeps an open layout.As a result,branch mouth flow is significantly affected by the asymmetric tidal flow of main river and the cross flow at the entrance area of the sluice gate.Based on Jiepai junction,downstream and upstream flow condition is studied.

Abstract:Based on a practical navigation lock with high-head and large scale in China,we use RNG k-ε model of turbulence flow and combine with VOF method to establish a corresponding 3d numerical model of the filling and emptying system,which is two areas through the ports introducing the water to the chamber from the main culverts designed at the bottom of lock chamber.We simulate the 3d hydraulic characteristics of the normal operation during the filling process,and analyze the flow field within the lock chamber,flow rate distribution of all the side ports and energy dissipation mechanism of ditches placed on the lock chamber bottom.The corresponding technical references from the research achievements can be provided for the design of the filling and emptying system.

Abstract:In order to analyze the mechanical characteristics of counter-pulled sheet pile structure in Xinxia Port double-lane lock,we model the structure of the dual chamber ABAQUS finite element software.We simulate the double-track synchronous excavation with modified Cam-Clay model,compare and analyze the difference of the structural characteristics of counter-pulled sheet pile and single-anchor sheet pile during the construction period.During the operating period,we bring water pressure to bear on the double sheet pile,and study the global deformation characteristic of mid-partition wall and the bearing and deformation characteristics of earth among piles.The results show that the displacement of counter-pulled sheet pile is far less than that of single-anchor sheet pile,but the deformation of them are similar,and the regularities of distribution of bending moment and earth pressure are coincident with little difference.During the operating period,the main lateral displacement to low water side chamber of the wide and shallow mid-partition wall is shear deformation.The increment of earth pressure on piles is related to the distribution of net hydrostatic pressure on them,and also affected by the force passed by the upper connecting rod and the counter-force of the lateral brace in low water side.Lateral compression is produced when the earth among piles deliver and diffuse the lateral pressure,the earth among piles can share most responsibility for shear force.The bending moment of the earth among piles is mainly bear by the two piles.The existing simplified calculating method of the double sheet pile cannot yet reflect the shearing resistance of the earth among piles,and it is worth studying further.

Abstract:The flow condition at downstream gate of ship lock is affected by diversion from bottom and peak of dams,which is easy to destroy the diversion effect of original river channel,and it is disadvantageous to navigation of downstream traffic area.In this paper,a new type of diversion structure,pile foundation through ventilation guide is introduced,and the water flow characteristic test and ship model test are carried out to test the engineering effect by taking Wuqiangxi hub lock as an example,with initial and optimized schemes.The experimental results show that the structure can improve the flow conditions of the downstream port,and the optimized scheme is more effective than the initial scheme in improving flow conditions in the downstream gate area of the Wuqiangxi hub,which is more conducive to ship navigation.

Abstract:The study of design lowest navigable stage in water and sediment variation environment is an important issue in waterway regulation engineering.Based on analyzing the riverbed scour and silting evolution in the key reaches of Xijiang River from Jieshou to Zhaoqing,and according to the hydrological regimes characteristics,we use the synthetic duration curve method to calculate the minimum design navigable discharges.Then we obtain the influence magnitude and range of tide,unsteady flow,waterway regulation engineering on design lowest navigable stage by means of flow mathematical model.Finally we get the design lowest navigable stage along the river.The study is a good reference for the calculation of design lowest navigable stage in tidal reaches below the dam in water and sediment variation environment.

Abstract:According to Guniusha waterway problem and the topographic data of the observed over the past 50 years,this paper analyzed the Guniusha waterway evolution characteristics and the causes of navigation obstacle property and genesis of shallow region.The results show:the main obstruction of Guniusha waterway is due to its transition section wider and shallower.In recent years,the retreat of the Guniusha side foreland is confined by the first phase projects,but the framework of river reach is not changed due to the low elevation of the first phase projects.The water flow in the transition section is scattered,and the channel of flood and dry water is inconsistent,and the first phase projects are not yet fully effective in guiding water flow scoured the transition section of shallow ridge,these phenomena causes the transition section navigation channel become shallower sometimes.In addition,the descending phase of flood becomes shorter after the operation of the TGR,which weakens the erosion rate of the channel,and makes maintaining the 4.5 m waterway depth condition difficult.

Abstract:For the change of fluvial sedimentation characteristics and the channel condition in the typical reach of fluctuating backwater zone in the Three Gorges Reservoir after the 175 m impoundment,and based on the recent continuous maps of Luoqi reach,we carry out a comparative analysis of the annual fluvial sedimentation process in Luoqi reach and study the characteristics of annual fluvial sedimentation,and obtain the influence on the channel condition,which may serve as reference for the maintenance of the channel and navigation safety of the ship.

Abstract:AGV is an equipment of the horizontal transportation,and is mainly responsible for the transportation of containers.Due to the factors of the loading capacity of QCs and YCs,the distance of horizontal transportation and the increasing capacity of container,the horizontal transportation is the bottleneck which restricts the development of the automated terminal.Combined the actual operation of the terminal,we adopt the method of “model + instance + simulations” to study the AGV path optimization problem of automation terminal problem.We combined with the theory of road traffic flow,and put forward the virtual traffic circle strategy to avoid conflict and congestion of AGVs.Under the unloading process,we use the eM-Plant simulation software to simulate the traffic control strategy from different views.Experiment results show that the different AGV paths affect the working efficiency of automated terminal.And it can further improve the efficiency of terminal operation,and provide certain reference for AGV path optimization in automation terminal.

Abstract:Port & waterway engineering is characterized by a long construction period,tough construction conditions,field construction,over water work and it is affected by the topography,geology,climate,etc.,so the BIM technology of architecture can’t be directly applied to it.This paper analyzes the current application of BIM in port & waterway engineering in the design phase,construction phase and design & construction collaborative application， points out the existing problems of BIM application in the port & waterway engineering and presents corresponding solutions,elaborates the chances of the application of BIM technology in port & waterway engineering to“the Belt and Road”overseas projects,and proposes the idea of 10D-BIM.

Abstract:The lattice shaped diaphragm wall is a kind of new revetment structure,which has high rigidity.The structure can be safe and environment-friendly with the help of soil reinforcement in front of revetment to reduce the horizontal displacement of the lattice shaped diaphragm wall.The paper introduces the application of the lattice shaped diaphragm wall revetment based on an engineering project of the water intake in an electricity plant.A 3D model is established by software Plaxis3D and soils are constituted by HS model.The design method of soil reinforcement is given to analyze the influence of the replacement rate,width and depth on the horizontal displacement.Since the revetment in soft clay is sensitive to the soil strength indicators,the sensitivity analysis is carried out.

Abstract:When determining the characteristic value of subsoil bearing capacity by using the empirical statistical relationship of loading test or in-situ test,the value of corresponding to the basic condition is considered.While the foundation design is carried out,the standard combination of the ultimate bearing capacity is considered,namely,the load design value is adopted.In view of this problem,the failure modes of foundation soil under horizontal force of the hydraulic retaining wall is analyzed,and the influence of embedded depth and width on the bearing capacity of foundation is studied.In order to improve the bearing capacity of the hydraulic retaining wall,the method of introducing basic embedded depth correction coefficient is adopted.

Abstract:We study the basic characteristics of load displacement curve(P-S curve) of uplift anchor in this paper.According to the property of rock mass,we analyze the development trend of two kinds of curves.Based on the basic characteristics of P-S curve of uplift anchor,we verify theoretically the feasibility of hyperbola model,exponent model and power function model,compare the advantages and disadvantages of the three models at Pu/2 position(the half of ultimate bearing capacity),and use the three models to fit the measured data to further verify the accuracy and applicability of each model.The results show that the power function model has the highest precision and wide range of application,while exponent model is moderate in accuracy,and hyperbola model is relatively worse than the aforementioned ones.The steepness of the P-S curve of the uplift anchor is related to the upper convex exponent of the power function,and the curve is steeper when the upper convex index is between 0.75-1.It is suggested that the proper mathematical model shall be selected to describe the curve type according to the actual rock mass properties,and the power function model is preferred when describing the P-S curve of anchor bolt.

Abstract:The pit for the culvert of the fish way entrance is extremely large,beside which power station’s typical buildings and Sanmenqu lock chamber are built,and the approaching road is built above the culvert.In view of the problems such as narrow construction site and multiple limitations,we study the type of the supporting structure and corresponding application conditions.Conducting the detailed design of the brace type structure,double-row pile type structure,and the construction scheme of jacking box culvert,and carrying out the scheme comparison and selection based on the qualitative analysis and reviewing calculation,we determine to adopt the twin-bracing scheme for implementation.Meanwhile,the observation requirement and matters needing attention are also presented.

Abstract:of dredging and reclamation project in Kuwait,we analyze the geological sampling and testing result in discharging outlet or formed reclaimed slope underwater,and monitor the dredging material in the whole process.Combining with evaluating the suitability of backfill material for vibro-flotation by pre-CPT,which can provide basis and guidance for dredging operation and subsequent ground treatment,it ensures the quality of hydraulic fill material meet the vibro-flotation’[KG-*3]s requirements,and makes greater economic or rationality for ground treatment.The introduced monitoring methods and measurements for dredging material can provide meaningful reference for similar overseas projects.

Abstract:For the construction of the track foundation of fully automatic terminal storage yard under complex foundation condition,we put forward the test standard for the construction of sleeper and the ballast foundation of the terminal storage yard project,and establish the track construction technology and procedures based on the design scheme of the new U-shaped groove track.The monitoring results of parameters including the track elevation,span,inclination and flatness tolerance show that the proposed construction technology can ensure the accuracy of the track,and the settlement of track during operation is stable.The average settlement of 38#～53#storage yards is about 16 mm,and the maximum average settlement of all monitored boxes can be controlled within 80 mm.The construction technology of the track construction for the automatic terminal yard suggested in this paper can ensure that the track settlement during operation be controlled within the allowable range.

Abstract:Based on the effect of high piled wharf construction on navigation safety of inland waterway,and navigation conditions of the Xiangshui high piled wharf project in Jiangsu,this paper analyzes the occupation waters of the construction vessels in different construction stages,such as dredging,piling,precast member hoisting.According to ship flow in inland waterway,it proposes the appropriate assurance measures of navigation safety,so it can ensure the channel unobstructed and navigation safety in high piled wharf construction stages.

Abstract:The existing prefabrication process of the concrete interlocking block is low,and the quality of construction is affected by human factors and the weather,which cannot meet the mass production demand.For this problem，we study the key technologies of mechanized production and steam curing of concrete interlocking blocks.We develop a whole mechanized production process for concrete interlocking block through the mechanization improvement of each production link and the adoption of steam curing technology,and make each process efficient and reasonable connection.Compared with traditional techniques,the new process can greatly improve the construction quality and production efficiency,save labor costs at the same time.Because the whole production process can be completed in the factory,it saves the site,is not affected by the bad weather,and reduces the cost and the working period.Therefore,the new process can meet the needs of mass production of concrete interlocking blocks.

Abstract:Considering to the breakwater projects at Maoming Bohe New Port area having been hit by four typhoons with large loss during the construction period,and the loss rate reaches about 5% of the sum of both the construction cost and period by the contract.We systemically analyze and carefully observe the destruction scene by typhoon,and find the basic route for the typhoons to destroy the breakwater:the huge wave breaks over the outer slope and crashes to the top of the breakwaters with both huge potential and kinetic energy,even both internal and outer slopes are basically protected,and they can also crumble the inside top and bring to the breakwater to collapse one section by one,for it becomes the weakness.Thus according to dynamically optimized precaution schemes against typhoon,we use the local stones with large size to pave on the top so as to strengthen it integrally,we increase its capability to withstand washing.It is counted that the loss rate both of the construction cost and period by the latter two typhoons greatly lower than that by the first two typhoons,and it has the obvious ettect and the beffer guide to the outstanding construction.

Abstract:During reclamation works，the abrasion to pipelines from dredged soil is an important influencing factor for project implementation.Currently,there is no study and research relating to abrasion of pipeline pumping sandy ball clay.On the basis of the statistic data of Xiamen Caicuo Project,we focuse on the study of abrasion from sandy ball clay,analyze the extent of abrasion to various parts of pipelines pumping such soil,and compare the soil with typical soils in the related standard form to determine the abrasion on pipelines,which can be used for adjustment and optimization of the deployment of pipelines.The research conclusion is instructive to similar projects,and such monitoring,comparison and analysis method for pipelines has common applicability.

Abstract:The dredging project of Biguiyuan in Malaysia has the characteristics of complex engineering soil and dry mud surface.In the construction site,a series of problems,such as prone to plugging,large fluctuation range of flow velocity,and muzzle,are easy to be encountered,which seriously affect the construction efficiency of ships.To solve the above problems,through the study of mining cutter-suction ship control technique,transmission technology,we changed the way mining stratification,transmission construction parameters such as flow rate and concentration of conveying to optimize its construction technology.After the process optimization,there were no problems such as collapse or blockage in the construction of the dredging ship of country garden in Malaysia,which accelerated the construction schedule and saved the construction cost.

Abstract:Usually，the slope of the hard rock is steep,or even vertical.The slope excavation method is pre-split blasting or smooth blasting.The center line of the borehole coincides with the slope line,and the construction is relatively simple.But for the soft rock or weathered rock slope,to ensure the stability of slope,the slope angle is smaller.It is difficult to make the center line of the borehole coincides with the slope line,so it is difficult to construct.For the soft rock or weathered rock,the construction method of controlled blasting with staged vertical borehole and flexible cushion is adopted,which is characterized by easy positioning,efficient drilling,short construction period and low cost.The purpose of setting flexible cushion on the bottom is to crush the upper rock without damaging the lower slope.By the method,73 000 m2 slope of Quanwan coal wharf project in Huizhou Port was successfully excavated.

Abstract:To solve the difficulties of limited schedule,work window and operation area,together with massive size and large quantity of rock and armor block,and high inspection acceptance requirement of the rock dumping and armor block installation construction between piles of Hadarom port at Ashdod,Israel,we put forward the solution which use separable composited steel plates onto the top of the temporary support of steel pipe piles as a working platform for crawler crane working with typical equipment for different types of rocks and armor block with the construction progress record and winter protection design,to serve as reference for the rock dumping and armor block installation construction between piles of standing pile wharf under similar wave condition.