大峡水电站的枢纽布置

根据大峡坝址的自然条件，论述了在深覆盖层修建混凝土坝的合理性；指出大峡水电站枢纽左岸设置溢洪道，河床岩基上建泄水底孔及河床式电站厂房，机组段设排沙底孔，左、右岸挡水坝段设灌溉管的枢纽布置型式是恰当的；泄洪排沙设施采用立面上分层，平面上沿挡水前沿分散布置，顺应河势，运行灵活；在设计的全过程中，不断进行枢纽布置优化，为加快施工进度，提前发电创造了条件。

General project layout for Daxia Hydropower Station

This paper describes the reasonableness of building rock foundation concrete dam in the area with deep overburden layer on the basis of the natural conditions in the dam site of Daxia Hydropower Station.It points out that the project layout is very proper which the spillway is arranged in the left bank of power station;the flood relief bottom hole and the power house are built in the rock foundation in the river bed;bottom desilting outlet is arranged in the section of generating unit;irrigation pipes are set in the sections of water retaining dam in the right and left banks.The flood releasing and sediment flushing facilities are arranged in layers in vertical plane and scattered in the front of water retaining section in horizontal plane which conform to the flow direction of the river and could be operated flexibility.In the design,the project layout has been continuously optimized which provides the favorable conditions of quickening construction progress and moving up the power generation