Abstract: The seepage of Yunfeng dam was serious, especially of the left dam abutment. By geological investigation and water pressure test, high uplift pressure and dam stress, fragmentized bedrock and seepage were found. Aiming at the seepage, combined with seepage prevention and decrease of uplift pressure, comprehensive treatment measures were adopted, and good effect was achieved.

摘要： 近年来，云峰大坝坝体渗水问题一直比较严重，特别是左坝头即2 号坝段。经过地质勘探、芯样分析及压水试验等，左坝头坝基扬压力大，基础岩石破碎，渗水比较严重，坝体应力超标。针对左坝肩渗漏问题，采取“堵、拦、排”等综合治理方法，兼顾坝基加固和降低扬压力，使问题得到了彻底解决。