Research On Guarding Measures Of Flood Plain In BinyinZhou In The Middle Reaches Of Yangtze River

Damazhou river course,which located in the central of jingjiang reach in the middle reach of Yangtze river waterway, belong to a single curved river type, Is the famous navigation-obstructing shallow water in the middle reach of Yangtze river. To curb Damascus chau beach groove pattern to the adverse direction of the channel change trend, and Eliminating the adverse impacts on the downstream channel, we Intend to implement high beach beach guard engineering BingYinzhou. This topic based on a high BingYin chau beach guardian engineering, combining the local model test and theoretical calculation, the method of optimization to protect, has important practical significance.By establishing high BingYin chau beach generalized flume model, do tank test under different conditions. Adjust the inlet boundary conditions were used, the change on the beach, water depth, flow velocity and direction, under the condition of fixed bed measuring various sectional velocity distribution situation, under the condition of fixed bed scouring and silting in observation terrain deformation, To analyze the structure of the flow in the vicinity of the camp and the scour mechanism, provides the basis for the stability analysis of safeguarding engineering. BingYin Zhou upstream section is the key of the beach face guard, low beach for flood land to the top of slope protection in flood season linking to the beach face velocity of the area of 1.2 ~ 1.4 m/s, experiments show that protect beach with spacing guard measures are feasible.Put forward different guardian of bank revetment type, low water level in the design, design high water level, any static water level under different conditions, such as the use of mechanical knowledge for force analysis, numerical simulation analysis was carried out on the bank slope stability, finally obtains the best guardian through the theoretical calculation model.According to the existing soft mattress length determination method, and connecting with the existing bank protection over bottom protection application situation, through the bank slope stability calculation, to determine the best guard over the bottom protection part of the row length.The results of this study would safeguarding structure design of engineering plan and provide a scientific basis for protecting beach layout optimization, also for the middle and lower reaches of the Yangtze river curved reach high beach guard engineering provide certain reference for the design of regulation structures.