小浪底水库蓄水初期运用坝基渗流分析与安全性评价

Seepage Analysis of Dam Foundation at Early Stage Operation for Xiaolangdi Reservoir and Safety Assessment

针对小浪底水库蓄水运用初期坝基渗流异常问题,在分析坝基防渗体系基础上探讨了坝基渗流原因,介绍了三个阶段帷幕补强灌浆等工程措施及处理效果,从渗水量变化、典型库水位下的防渗效果、防渗墙下游侧坝基渗透比降分析、库水位275m时防渗效果预测等角度综合评价补强灌浆后坝基防渗效果很好,因而得出坝基渗流安全的结论。

Aiming at the seepage anomaly of dam foundation at early stage operation for Xiaolangdi reservoir, the seepage cause of dam foundation is discusses in terms of analyzing seepage prevention system. The engineering measures of curtain reinforcement grouting at three stages and its effects are introduced. The seepage prevention effect of dam foundation is assessed comprehensively from the aspects of infiltration variation, seepage prevention effect at typical reservoir level, gradient analysis of dam foundation seepage in downstream of cut-off wall, prediction of seepage prevention effect at 275m reservoir level. The seepage prevention effect is good. So, it draws a conclusion that the seepage of dam foundation is safety.