我国水力资源十分丰富,但多数水电站处于深山峡谷之中,厂房及开关站的布置十分困难.为了减少大量的开挖和投资,有的水电站厂房和主变压器只得布置在地下和混凝土大坝内,如渔子溪、乌江渡水电站.有的水电站厂房、主变压器及开关站均布置在地下或混凝土坝内,如刘家峡、凤滩水电站.由于受岩层地质或受坝体结构的应力的控制,不可能在地下或坝内开设大面积的裸 China’s hydropower resources are very rich, but most of the hydropower stations are in the mountains and valleys, plant and switchgear layout is very difficult.In order to reduce the large amount of excavation and investment, some hydropower plant and main transformer had to be arranged in the underground and concrete dams, Such as Yuzi River and Wujiangdu Hydropower Station.Many hydropower station buildings, main transformers and switchgear are all arranged in underground or concrete dams, such as Liujiaxia and Fengtan Hydropower Stations.Because of the strata geology or the stress of the dam structure, It is possible to open a large area of ​​nakedness underground or in a dam