白云水电站混凝土面板堆石坝渗漏处理技术

白云水电站混凝土面板堆石坝最大坝高120 m,加固前大坝渗漏量达1 240 L/s,且快速增长,大坝安全受到严重威胁。论述了大坝除险加固中的一些新技术、新方法,如大水深渗漏声纳检测技术、水下起吊封堵门、水下堵头岩塞爆破等,以及混凝土面板大范围塌陷修复、面板裂缝处理、面板脱空检测与灌浆处理、疏松垫层料加密灌浆处理和止水修复等面板堆石坝系统治理技术。目前,经过系统治理,大坝渗漏量降至50L/s以内,加固治理效果显著,其渗漏检测和系统治理技术可供其它混凝土面板堆石坝的加固处理借鉴。

Seepage treatment technology for RCC dam of Baiyun Hydropower Station

The RCC dam of Baiyun Hydropower Station, with the largest height of 120m, reached a maximum seepage volume of 1240L/s with further rising before the reinforcement, thus it threatens the dam safety seriously. We introduce some new tech-nologies in the reinforcement, namely seepage detection by sonar in deep water, underwater lifting of closure gate, underwater blasting-demolition of rock plugging, also present some systematic RCC treatment technologies such as large scale renovation of concrete slab, slab crack treatment, hollow detection under slab and its grouting treatment, dense grouting for loose cushion lay-er, renovation of water-sealing. Until now, the seepage volume of the dam has lowered to 50L/s after systematic reinforcement, showing perfective effect, so the seepage location and treatment technologies could provide valuable references to other RCC dams.