新疆某水利工程垂直防渗方案比选

新疆下坂地水利枢纽工程坝址较特殊,为150 m深砂卵石地层,工程地质条件复杂,坝基防渗难度巨大。针对该复杂地质条件,施工单位认为应该采取墙幕结合的垂直防渗方案。墙体深度80 m,幕体深度70 m。运用岩土工程数值分析软件Geo Studio对幕体设置方案进行了分析计算,最终确定采用3排帷幕的施工方案。新疆下坂地水利枢纽工程的成功兴建对我国其他地区同类工程的建设具有重要的参考意义和借鉴价值。

Comparison and Selection of Vertical Seepage Control Plans in a Hydraulic Engineering Located in Xinjiang

There is a 150 meters deep sand and gravel under the Xiabandi hydro-junction which located in Xinjiang which has very high hydraulic conductivity,thus make the seepage control problem very challenging.A seepage control plan has been recommended by the constructor which combines diaphragm wall and impervious curtain.The wall is 80 meters deep and the curtain is 70 meters in the plan.This paper compare and select another plan by adopting GeoStudio software which has three lines impervious curtains.