Key Technology Research And Application Of The Yalu River Flood Prevention And Protection Project

The Yalu River is the border between China and Democratic People's Republic of Korea,the border border land erosion not only threatens people's lives and property safety,but also affect the normal production and living stability and our border boundary,it is detrimental to the image of the country.Therefore,the completion of the flood control and revetment works in the Yalu River has important practical significance for safeguarding the territorial integrity of the state and maintaining the national dignity.The the Yalu River flood control and revetment project was approved by the national development and Reform Commission in 1998 to implement the flood control emergency project.The planning scope of the project is from the dam to the Donggang River dividing line,and the length of river regulation is 118.3km.The main content of the project is to renovate and reinforce the flood control works in the urban and rural areas of Dandong City,and build the bank protection works along the the Yalu River coast and the middle reaches of the river.The main task is to protect the lives and property of the people along the coast,prevent the loss of land,and promote the economic development in Dandong.Considering the geographical conditions of the Yalu River and the hydrological conditions of the Yalu River flood control project to Revetment still faces many problems in construction,such as the the Yalu River River belongs to the tidal river section in Dandong City,the maximum tidal range 4.2m,close to the downstream of the maximum tidal range reaches 7.4m.Therefore,it is necessary to optimize the design and study the structure and construction methods of bank protection works along the river and island in the high tide differential tidal river;For the need of foundation seepage prevention and foundation backfill for the new city flood control wall engineering,it is necessary to study the anti-seepage engineering form and the mechanical construction scheme;According to the construction condition of the urban flood control project reinforcement project,the construction condition of the surrounding buildings is more,the scheme should be reasonable,feasible and convenient for the masses to be strengthened by the scheme comparison;At the same time also should study and solve method for levee embankment materials and embankment slope protection filter layer of new materials,new technology and downstream of the Yalu River estuary area of levee project.According to the technical problems of the Yalu River flood prevention and protection engineering,through investigation and field experience,project reference experience at home and abroad,is the basis of a large number of relevant literature,the full research and preliminary test are discussed and necessary,formulate key technical scheme of Dandong city of the Yalu River flood prevention and protection engineering.The contents include: the climax of poor tidal river without a cofferdam under water bag revetment construction technology,small excavator grab and chain slot machine with construction mode,anti slide pile wall,cut-off columns hanging geomembrane,geotextile filter layer and the beach slope local earth embankment constructed in winter and other single technology,the the focus is put forward for the first time and create a climax difference in tidal river without a cofferdam under water bag revetment construction technology,small excavator grab and chain slot machine with the construction mode,the tidal reach of the Yalu River River and the foundation of flood control wall anti-seepage engineering project can be successfully completed in the construction of a special case.From the point of view of the effects of the project,research on comprehensive technology successfully,solved the the Yalu River flood prevention and protection engineering in the tidal river along the Yangtze River and island revetment,city flood control engineering reinforcement,new flood wall engineering foundation seepage,embankment slope filter and estuarine areas of levee engineering projects are the key technical problems.Not only can save the engineering materials,engineering,engineering and other temporary relocation projects,and improve construction efficiency,reduce project cost,and can effectively solve the problem of tidal river flood prevention and protection engineering construction of the Yalu River along the Yangtze River and island revetment,reinforcement,and there are new urban flood control flood control wall foundation anti-seepage,embankment slope filter and estuary regional project technical problems in levee engineering.The Yalu River flood control and revetment engineering comprehensive technology has achieved successful experience,and can be widely used in engineering construction and production practice in the future,can achieve significant economic,social and environmental benefits,and has broad prospects for promotion and application.