贵州黔中大坝左岸帷幕充砂溶洞段处理技术

Curtain sand-filling karst cave segment treatment technology on the left bank of Guizhou Qianzhong Dam

岩溶地区筑坝建库,防渗处理是工程技术的重点、难点,尤其是遇到(充填)溶洞、岩溶管线等复杂地质情况时,处理结果的好坏将直接影响工程能否正常运行。处理方案的选择受溶洞成因分析、边界条件调查、施工条件等诸多因素影响,本文介绍了黔中水利枢纽工程大坝左岸帷幕灌浆工程ZPD4灌浆平洞大型充砂溶洞处理方案,并进行了经验总结。

Anti-seepage treatment is the emphasis and difficulty of engineering technology during dam and reservoir construction in karst regions. The treatment result will directly affect whether the project can be operated normally or not especially in the case of （filling） karst cave, karst pipeline and other complex geological conditions. The selection of treatment plan is affected by cause analysis of karst caves, boundary condition investigation, construction conditions and other factors. In the paper, experience is summarized aiming at ZPIM grouting foot-rill large-scale sand-filling karst treatment plan in curtain grouting projects on the left bank of Qianzhong Key Water Control Dam.