左江电站坝体横缝漏水化学灌浆处理

Chemical Grouting for leakage treatment of transverse joints inside dam body of Zuojiang Hydropower Station

分析了左江电站厂房和安装间横缝存在严重漏水的原因,论述了采取先在止水前钻减压排水孔将横缝内上游来水集中引出,再从横缝背水面逆向灌注LW、HW弹性聚氨酯材料的施工方案和施工工艺,并对化学灌浆防渗效果作了评价。

Based on an analysis of the causes for the serious leakage seen from the transverse joint between the erection area and main unit room of Zuojiang hydropower station, introduction was made on the treatment scheme and construction procedures, including drilling relief drainage holes until the front of the water seal to diverse the upstream water inflow from the transverse joint, then injecting LW and HW resilient polyurethane materials from the downstream side. The authors also assess the seepage-proof effect of chemical grouting.