Abstract:The permeable framework with six sides has good scour and silt action under the action of water flow.In recent years,it obtains a large area application in the Yangtze River channel regulation project,which becomes gradually as an indispensable engineering component in waterway regulation engineering.Because the prefabrication is used pure manual production,the process is relatively backward.This paper introduces the integral six-side permeable frame prefabricated pumping fabric technique to achieve the mechanical prefabrication.Compared with the traditional process,the mechanization of prefabrication can ensure the quality and working schedule,and reduce the cost.

Abstract:Taking Damazhou waterway as the research object,based on the study of measured data such as sediment,river terrain,etc.，we analyze the basic characteristics of river bed evolution.Focusing on the river bed evolution after implementation of the Jingjiang River regulation project,and combining with the results of the physical model of the Jingjiang phase II regulation project,we predict the development trend.The results show that:after the Jingjiang phase II regulation project，on the right side of Damazhou waterway Bingyin beach tends complete,and the river regime is effectively controlled.

Abstract:To counter the problems in mosaic gabion construction and riprapping construction,the paper proposes a new technology about filling mosaic gabion and mosaic gabion equipped with lining.Combining with the Yangtze River Jingjiang reach Qixingtai beach revetment engineering,we draw the conclusion that the new technology about filling mosaic gabion can improve the construction efficiency and mosaic gabion equipped with lining,and reduce the construction cost

Abstract:In recent years,Dongbei waterway beach III to Xinba coastline collapses seriously,and the left edge of beach III continues to wash back,which leads to a significant increase in the river width.Based on the analysis of river bed evolution,and combining with physical model test results,we discuss the effect of waterway regulation of Dongbei waterway in the lower reach of the Yangtze River.After the implementation of the regulation engineering,Dongbei waterway’s channel scale can reach 4.5 m × 200 m × 1050 m.

Abstract:During implementing Yanglinyan Waterway and channel regulation project,a collision accident may occur among the construction ships to lead to the risk of fuel leakage in the environment of the project river section.This paper analyzes the risk points and the probability of accidental cost during the project construction,builds the oil spilling forecasting model,calculates the accident risk and consequence，and provides the data for construction and environmental management of Yanglinyan project in order to reduce the danger and hazard.

Abstract:To counter the problem of uneven distribution and safety risk of artificial throwing in the Jingjiang reach channel regulation project in the middle reaches of the Yangtze River,a special throwing hanger is designed.The construction adopts group throwing technology which can control the splash of pervious frame and guarantee the accurate positioning and even throwing.Meanwhile,it avoids the personnel or deck operation which are needed in the traditional construction,and thus reduces the safety risks during construction.

Abstract:After the impoundment of the Three Gorges Reservoir,scouring often exists in Jingjiang River channel,in which the promoting siltation effect needs to be improved. A new type of controllable net cage structure which is ormed by meshes with equal interval is proposed.By flume experiment,the decelerating and promoting siltation effect has been analysed in different velocity,water depth and positions.The structure can improve water flow conditions in engineering areas,lower the low rate in the large spce,and achieve the purpse of siltation promoting.

Abstract:The construction area of environmental dredging engineering in Caohai of Dianchi Lake can be divided into three parts.The construction area is 700,000 square meters,the volume of work is 2.2 million cubic meters,and the transport distance is from 8 km to 15 km.In order to solve the problem of the limitation on the roadway,the long distance transport technology has been analyzed and discussed.On the basis of the practical problem of the construction site,the boost pumping is chosen which is efficient for long distance dredging soil transportation.

Abstract:Aiming at the problems such as high drilling depth,high safety requirements,large amount of engineering,tight schedule for Linchijiao Reef project of Meizhouwan Channel Phase III，this paper analyses field geological conditions,pore network parameters,differential time,explosive consumption of single-stage,seismic wave intensity etc.The millisecond blasting technique,which combines inside the hole with outside the hole,can effectively solve the problems in the construction，to ensure the safety of the surrounding wharf,tanker ships and submarine pipelines.The construction progress is accelerated,and the construction tasks are completed successfully.

Abstract:As the key technology in the environmental dredging project,the mud flocculation construction with belt filter press is affected by many factors,such as mud concentration,flocculants selection,dosage and flocculation time.Under the condition of choosing selected type of belt filter press,mud characteristics and flocculants,the relevant technical study and improvements are made on Nanhu environmental dredging construction project in Wuhan.It can save the use of flocculants,reduce the workload,and improve construction efficiency and quality in the mud flocculation as well as in the entire environmental dredging dehydration curing section.

Abstract:In view of the problems in the embankment construction such as the lack of sand,the far-away sand source and unsuitable soil condition for the site getting of sand applied to the bagged sand,and based on the PMB petrochemical project in Brune,this paper carry out a research on the cutter suction dredger combined with bagged sand for the embankment,i.e.，adopting large cutter suction dredger to fill the bagged sand embankment to probe into the new technology for the bagged sand embankment and the control of the construction efficiency,construction quality,as well as the construction cost.

Abstract:In order to ensure the construction quality of the north bank revetment of the reclamation project in Dalian airport industrial park,end blasting substitutes side blasting in the construction of the blasting and siltation.The construction technologies of side blasting and end blasting are introduced,and the construction quality,schedule and cost are discussed under the same conditions.By using the method of comparative analysis,it is concluded that it is necessary to give priority attention to selecte the end blasting in the case that the width and depth of body have high requirements by blasting silting removal method,and the body section cannot be taken shape through a side blasting.

Abstract:Offshore filling artificial island program is adopted in the new airport project construction,whose deep water cofferdam is constructed using blasting crushing and silting method.Effective determination of the amount of explosives and explosives buried depth and other related construction parameters in deep water cofferdam treatment process is key and difficult.Taking the B27 cofferdam midpoint as the research object,this paper calculates the blasting parameters,proposes construction process,and analyses the construction effect.

Abstract:To solve the problem of restoration of damaged bagged concrete revetment，this paper studies the design and construction of the bagged concrete combining with a practical project case,expounds the design mentality of inserting steel and hanging bagged concrete,analyzes the stability of revetment restoration and considers comprehensively the design of revetment restoration of newly placing bagged concrete.Adopting the construction technology of setting steel and hanging bagged concrete,the construction is easy and fast,and the cost is low.

Abstract:Dredging construction is one of the effective solutions to the water problems.In order to ensure the construction quality,improve the environment and develop the economy,we should grasp the key points of dredging engineering construction accurately,improve the skills of constructors,and select the suitable dredging equipments.By analysing of the Taipingkou history channel level,the natural conditions and this year’s dry season water level,we choose reasonable dredging ship and construction technique,which can ensure the smooth navigation Taipingkou channel in dry season.

Abstract:When a foundation pit is excavated in high water level,groundwater may cause drift sand and piping failure,even the slope instability or pit wall collapse due to the influent from seepage.Before the excavation of the foundation pit,the common effective way is to reduce the water level inside and outside the foundation pit adopting the light well point dewatering technology.Taking Venice Hengda sea drainage culvert construction engineering culvert excavation as an example,the design of the light well point precipitation scheme and the construction process of concrete is described.

Abstract:In the shoal reclamation project,due to the restriction of long distance and shallow water,the cutter suction dredger can’t take its full advantages in the construction efficiency,schedule and cost.Taking the land reclamation engineering of Tieshan Port in Beihai for example,and based on the research and practice on the feasibility of the joint construction by sand-blowing vessel,we draw the conclusion that the joint construction by the octopus ship and conveyor ship is applicable to the shoal reclamation.The method,process and key points control are expounded.

Abstract:Relying on Heishazhou waterway regulation project,BIM technology is used to solve several key problems in implementation and management of the construction,and plans of BIM application are put forward.The results show that the BIM technology has higher application value in waterway regulation construction organization simulation,construction schedule and cost management,collaborative work,construction quality management,etc.，and can be applied in the similar projects.

Abstract:To solve the problems of the great change of scouring and silting and the imprecise measurement of earthwork,we measure the earthwork accurately by the automatic measurement instrument,which is equipped in the trailing suction hopper dredger:Changjing No.6,in the 12.5 m deepwater phase-II project of the Yangtze River below Nanjing.We also discuss the principle of the measurement and summarize its applications

Abstract:The research of single image fog removal method for seaway has broad application in the field of the seaway construction.A single sea surface image denoising method based on sky region segmentation is proposed,which compares with the traditional methods in time consuming and image definition.The results show that the new method has some advantages over the traditional methods,such as multi-scale Retinex,tunnel priority and CLAHE.

Abstract:At present,due to the structural adjustment of the port freight companies along the Yangtze River,the change of the varieties of goods transported are not adapted to the wharf.In order to improve the utilization efficiency of the Yangtze River port shoreline,based on in-depth analysis of the requirements for technical renovation of the terminal,combined with the provisions of the relevant national standards and finite element calculation results of structural members,we adopt the method of strengthening or replacing the local component of the wharf and increasing the related facilities to the wharf.

Abstract:It is key to determine accurately the preformed settlement when sand bag embankment created on soft soil foundation.Relying on PMB petrochemical project in Brunei,the influence factors of preformed settlement during the embankment construction period are analyzed,and the preformed settlement of embankment is calculated by hyperbolic method.

Abstract:Due to the common grab dredger is not suitable for maintenance dredging in narrowness,shallowness and danger of upper stream river,a special dredger has been developed.The dredger integrates grab bucket,hoe shovel and steel harrow into a whole body,which is suitable for sandy gravel waterway maintenance.The performance analysis of positioning system,dredging equipment and Auxiliary dredging system is done.Based on the construction data,the social benefit is evaluated.

Abstract:Shenzhen Port Tonggu Channel is the main access for large cargo ships to the major ports in Shenzhen.In view of the influence of grappling dredger construction on the safe navigation,we calculate the safe distance of the navigation vessels and determine the grappling dredger construction scheme.Under the prerequisite of guaranteeing the safe navigation of vessels,we can improve the construction efficiency of the grappling dredger.By the precise positioning and reasonable avoidance program,we ensure the smooth construction and safe navigation.

Abstract:In the process of land reclamation construction,the site equipment and external force produce a large amount of dust.To counter the contradiction of the environmental protection and economic development,we probe into the construction scheme for the dust prevention and control in the loading period of large-area reclamation based on the Xiamen Dadeng and Xiaodeng reclamation and soil treatment project.