一、概述 龙羊峡水电站底孔泄水道位于右岸11~#坝段内呈非径向布置,出坝后沿岸坡傍山开挖而成的基岩平台上,紧靠坝后厂房端墙边通过,至下横围堰堰顶处设曲面贴角斜鼻坎,将水流挑入下游河床。底孔是龙羊峡水电站最低层的泄水设施,担负着导流洞下闸蓄水后,向下游供水、初期泄洪、排沙,放空水库及正常运行时备用泄洪等任务。 I. Overview Longyangxia Hydropower Station bottom hole drains located on the right bank 11 ~ # dam section was non-radial layout, out of the dam along the slope of the hillside excavation made of bedrock platform, close to the dam after the edge of the plant wall Through to the top of the weir at the top of the horizontal cross-weir slope angle nose corner ridge, the water flow into the downstream riverbed. The bottom hole is the lowest-level drainage facility of Longyangxia Hydropower Station. It undertakes the tasks of downstream water supply, initial discharge, sediment discharge, emptying reservoirs and standby spillway in normal operation following the impoundment of the diversion tunnel.