白沙河水电站大坝渗漏治理技术

Treatment measures of dam leakage at Baishahe hydropower station

白沙河水电站自运行以来,大坝渗流量一直高于国内同等规模面板坝,影响工程正常运行。综合检测、检查及渗漏成因分析后,采取了周边缝集中渗漏点水下灌砂及灌浆、基础水下帷幕灌浆、接缝表层止水更换等治理措施。从目前运行情况来看,治理效果良好。笔者对治理技术进行了总结,为类似工程渗漏治理提供参考。

Since the operation of Baishahe hydropower station,its dam seepage had been greater than that of face slab dams of the same scale in China,which affected the normal operation of this project.Af⁃ter comprehensive detection,inspection and the analysis of leakage causes,treatment measures were ad⁃opted such as underwater sand filling and grouting at leakage points of peripheral joints,underwater cur⁃tain grouting of dam foundation,and replacement of the watertight seal on joint surface.Concluded from the current operation,the treatment effect is good.The author summarizes the treatment measures,which can provide reference for leakage treatment of similar projects.