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一、概述下洞水电站为长江支流龙溪河上的第四个梯级电站,下距长江边羊角堡码头6km,上距狮子滩电站26km。电站枢纽由混凝土重力坝和左岸引水发电系统等建筑物组成。大坝全长209m,自左岸至右岸共分成18个坝段,其中1～6坝段为左岸挡水坝,长76.9m;7～14坝段为溢流坝,长85.8m;15～18坝段为右岸挡水坝,长46.3m。坝顶高程225.00m,最大坝高39.5m。厂房位于左岸,距大坝120余米,厂内装两台1.5万kW混流式水轮发电
I. Overview Hsiandong Hydropower Station is the fourth cascade station on the Longxi River, the tributary of the Yangtze River. It is 6km away from the Sheangjiapo Ferry Pier on the Yangtze River and 26km away from the Shizitan Hydropower Station. Power station hub by the concrete gravity dam and left bank diversion power generation system and other buildings. The dam has a total length of 209m and is divided into 18 sections from the left bank to the right bank. Among them, sections 1 to 6 are left-bank dam with a length of 76.9m; spillway sections 7-14 are spillway 85.8m long; Section of the right bank retaining dam, length 46.3m. Dam crest elevation 225.00m, the maximum dam height 39.5m. Plant located on the left bank, more than 120 meters away from the dam, the plant installed two 15000 kW Francis turbine