沙溪口大坝19号坝段渗流成因分析及处理

Seepage Causes Analysis and Treatment at No.19 Dam Block of Shaxikou Dam

沙溪口大坝自首次蓄水以来,19号坝段基础排水孔的排水量较其他坝段大,占溢流坝段坝基总排水量的50%左右。通过分析基础渗流监测资料,复查基础水文地质和工程地质条件,初步分析探讨了渗漏成因,并提出采用现场钻孔、测压、连通性等试验进一步验证。根据试验成果查明了基础排水孔水量大的原因,提出了合理的处理意见。

Since the first impounding of Shaxikou dam, the seepage from the dam base drainage holes of No.19 dam block has been much more than other drainage holes, which is about 50% of the total seepage from spillway dam blocks. The seepage causes are initially analyzed and discussed by analysis Of dam base seepage monitoring data, re-referring to data of dam base hydrogeology and engineering geology.Field drill test,Water pressure measuring and communicating holes tests are put forward.The seepage causes which are much more than other dam blocks are found out.Furthermore,Reasonable treatment advices are advanced.