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一、概况铜街子水电站系大渡河规划最末一个梯级,上游距已建龚嘴水电站33公里,装机容量60万千瓦。工程采用左岸明渠过水,上下游土石围堰断流,基坑全年施工的导流方式。明渠长590米,宽60米,按20年一遇洪峰流量9200米~3/秒设计,50年一遇洪峰流量10300米~3/秒校核。上下游围堰均建在覆盖层上,分别高30米和16米,总堆筑量83万米~3。覆盖层防渗采用混
I. Overview Tongjizi Hydropower Station Dadu River planning the last step, the upstream has been built Gongzui Hydropower Station 33 km, installed capacity of 600,000 kilowatts. The project uses the left bank open channel through the water, upstream and downstream rock and soil cofferdam cut off, foundation pit year-round construction of diversion. The open channel is 590 meters long and 60 meters wide. It is designed with a flood peak flow of 9200m ~ 3 / s in 20 years and a flood peak flow of 10300m ~ 3 / s in 50 years. Up and down cofferdam are built on the cover, respectively, 30 meters high and 16 meters, a total of 830000 m ~ 3. Cover seepage mixed use