大容山（高垌）水库均质土坝防渗设计

大容山（高垌）水库主坝为均质土坝,由于清基不彻底、坝体填土压实度和渗透系数不满足规范要求、坝基岩土渗透系数不满足要求,虽经1961年至1997年五次加固,坝体和坝基仍渗漏严重。为此,采用坝体塑性混凝土防渗墙与坝基帷幕灌浆进行防渗处理相结合的加固方案。经核算,加固后浸润线明显降低,渗漏量明显减少,防渗效果显著。同时对溢洪道、输水设施、管理设施、进库上坝公路等,进行全面彻底的加固和改扩建,使其功能和效益得到充分发挥。

Anti-seepage Design for Homogeneous Earth Dam of Darongshan(Gaodong) Reservoir

The main dam of Darongshan(Gaodong) reservoir is made of homogeneous earth,while neither the compactness and permeability coefficient of the dam filling nor the permeability coefficient of dam foundation rock mass is satisfied the specification requirements due to incomplete foundation clearing work.There is still serious seepage in dam body and dam foundation although five times reinforcements from 1961 to 1997.Therefore,a reinforcement scheme by combination of dam body plastic concrete anti-seepage wall and dam foundation curtain grouting is adopted.According to calculation,the seepage line is significantly dropped and the seepage is greatly reduced after reinforcement,the above scheme wins remarkable anti-seepage effect.Meanwhile,the spillway,water-carrying facilities,management facilities and access roads to the damsite are reinforced and extended completely,by which their functions and benefits are fully realized.