金安桥水电站工程截流施工技术及特点

金安桥工程利用1号导流洞单洞分流下进行大江截流,截流流量为829 m3/s,龙口最大落差4.72 m,最大流速达7.15 m/s,截流段河床地形、地质条件复杂。在截流模型试验各种工况的试验成果基础上,结合截流的现场地形条件、分流特点、截流填筑材料等方面的分析比较后确定了上、下游土石围堰一次断流、右岸2条导流洞全年导流和60 m宽戗堤右岸单向进占立堵的截流方案,顺利实现了大江截流。

River Closure Construction and Characteristics of Jin'anqiao Hydropower Station

The river closure for Jin'anqiao Project was conducted on the conditions of using one diversion tunnel for water discharge,and with the flow rate of 829 m3/s,the maximum gap drop of 4.72 m and the maximum flow velocity of 7.15 m/s.Based on the model tests for river closure under different conditions and the analysis on field topography,diversion features and filling materials,the closure schemes with end-dumping closure by an 60 m-width dike from right bank,full river closed by upstream and downstream earth...