某水电站溢洪道牛腿与大坝碾压混凝土整体上升施工方案

摘要

杨家园水电站位于贵州省习水县二郎乡，地处赤水河一级支流桐梓河下游河段。水电站大坝为碾压混凝土椭圆双曲拱坝，最大坝高66 m，坝底厚18.5 m，坝顶厚5 m，厚高比0.28，坝顶中心线弧长150.8 m，碾压混凝土浇筑量约7.2万m3。文章介绍了杨家园水电站碾压混凝土拱坝在施工过程中，提出的针对溢洪道牛腿部位与大坝整体上升的施工方案，达到了缩短工程工期、保证施工安全的效果。%Yangjiayuan Hydropower Station is located in Erliang Township, Xishui County, Guizhou Province,on the downstream of Tongzi River which is the first tributary of Chishui River.Roller compacted concrete dam is elliptic hyperbolic roller compacted concrete arch dam,the maximum dam height is 66m,the base of the thickness is 18.5m,dam crest 5 m thickness,thickness ratio of 0.28,the center line of the arc length 150.8 m,RCC was about 72 000 m3 .This paper introduces overall rising construction scheme of spillway corbel parts and dam in the Yangyuan Hydropower Station during RCC arch dam construction,so as to shorten the construction period,guarantee the safety of construction.