大渡河沙湾水电站右岸山体防渗施工

Anti-seepage Construction of Shawan Hydroelectric Power Station,Daduhe

大渡河沙湾电站一期围堰工程防渗体系由混凝土防渗墙和右岸山体组成,本文介绍了右岸山体防渗施工技术。右岸山体设计帷幕灌浆,上下游堰体基岩帷幕灌浆与防渗墙搭接,先开挖灌浆平洞,再采用帷幕灌浆法,对地质缺陷部位进行有效的防渗处理,确保了基坑施工安全和顺利地进行。

Anti-seepage system of the cofferdam of Shawan Hydroelectric Power Station phase one,Daduhe consists of concrete cutoff wall and mountain on the right bank.The article describes anti-seepage technology used for the mountain on the right bank,including curtain grouting to make rock curtain grouting of both upstream and down stream cofferdam be well integrated with the cutoff wall.The grouting begins with excavation of horizontal opening,followed by curtain grouting with special design for geological defect locations.