复合土工膜在水库除险加固工程中的应用

Application of Composite Geomembrane in Risk Elimination and Reinforcement Work of Reservoirs

基于长顺县天生桥水库均质土坝坝体严重渗漏已造成坝后沼泽化、下游水塘积水等现象,采用复合土工膜除险加固初步设计方案,详细分析了复合土工膜的优缺点,并深入探讨了复合土工膜的铺设工艺、拼接工艺、施工中应注意的细节,以及复合土工膜与坝踵、坝肩的嵌固墙及其基础帷幕灌浆的有机结合,形成大坝完整的防渗结构,以有效解决该工程的渗漏问题,可供类似工程参考。

In Tianshengqiao Reservoir in Changshun County,Guizhou Province,the serious leakage of the homogeneous earth dam has caused swamping behind the dam and water accumulation in downstream ponds.In the risk elimination and reinforcement work of the dam,a preliminary design scheme with composite geomembrane is proposed.The advantages and disadvantages of the composite geomembrane are analyzed in detail.The laying process,splicing process and details to be noticed during the construction are discussed.Also,the connection of the composite geomembrane with the embedded walls of the dam heel and shoulders and the foundation curtain grouting is emphasized.So that,a complete seepage prevention structure can be formed for the dam.The leakage problem of the project is thus effectively solved.It can be useful reference for similar projects.