论文部分内容阅读
土坝坝体填筑土与坝基接触带的防渗是土坝防渗的重点和难点。在近来的小型水库除险加固设计施工中,土坝防渗一般是采用坝体劈裂灌浆和坝基帷幕灌浆相结合的办法。土坝坝体部分劈裂灌浆形成的防渗泥墙与坝基帷幕灌浆形成的帷幕在坝体填筑土与坝基接触带处搭接,实施有效搭接并形成封闭防渗体是大坝防渗的关键。文章提出通过调整施工工序和利用坝体劈裂灌浆为静压注浆、可间歇反复灌浆的特点,使土坝坝体劈裂泥墙与坝基帷幕灌浆形成的防渗帷幕有效地搭接起来,形成完整的坝体坝基防渗帷幕墙。
Seepage control of earth dam body filling soil and dam foundation contact zone is the key and difficult point of earth dam seepage prevention. In the recent small reservoir reinforcement design and construction, earth dam seepage is generally used dam split grouting and dam curtain grouting combined approach. Earth dam dam split grouting formed impermeable mud wall and dam foundation curtain grouting formed in the dam filling soil and dam foundation contact zone overlap, the implementation of effective lap and the formation of closed seepage control body dam seepage key. The paper puts forward that by adjusting the construction process and using the characteristics of the grouting grouting of the dam body as static pressure grouting and intermittent grouting repeatedly, the anti-seepage curtain formed by the split mud wall of earth dam and the curtain grouting of dam foundation is effectively overlapped, A complete dam dam foundation impervious curtain wall.