观音阁水库坝基防渗处理设计

观音阁系在岩溶地区建坝，关键在于坝基防渗的可靠性．坝基防渗包括溶洞处理、断层处理和坝基帷幕灌浆．坝基溶洞一般进行开挖、回填或灌浆处理．Ｆ８与Ｆ２６断层交会区，采取开挖防渗井、回填混凝土及高压团结灌浆进行处理．＃５４坝段以左坝基以“１０ｍ页岩”为隔水层，采用高压灌浆法，形成封闭式帷幕；以右采用悬挂式帷幕，防止坝基和绕坝渗漏。

Dam Foundation Impervious Treatment Design

Guanyinge Dam is built in the limestone area,so the realiability of the foundation impervious is the most important. The foundation impervious work includes the Karst caves treatment, faults treatment and foundation grouting curtain. As a general, foundation Karst caves are treated by excavation and backfill or grouting. The intersection of fault F, and F,6 is treated by means of excavating, filling with concrete and high pressure consolidation grouting. From the left bank to Block 54, a closed curtain is formed by high pressure grouting, which connecting with impervious 10m thick shales. To the right bank, a suspended curtain is used to used to prevent the foundation and damabutment leakage.