里畈水库大坝扩建的基础防渗处理

Foundation Impermeability Treatment in Lifan Dam Extension Works

里畈水库扩建工程的大坝防渗处理是一项重要的技术措施 .为不影响原水库在施工过程中对下游的灌溉和供水功能 ,设计采用在原老坝上游面高程 185 4m的灌浆平台砌体上修建砼防渗面板 ,并和原坝防渗心墙基础的防渗帷幕进行联接灌浆 ,使之形成新的防渗帷幕 ,同时对原灌浆平台的砼浆砌石体进行加固和防渗灌浆 ,从而加快了工程进度 ,节省了投资 ,对整个大坝扩建工程的提前完成起到了重要作用 .

The dam impermeability treatment in Lifan Reservior extension is one of the most important technical measures.To protect the construction from impacting the irrigation and water supply downstream,it is designed to constract an impermeable concrete plate in the grouting platform at the level 185.4m of the dam,and connecting grouting is conducted so that the concrete plate and the existing impermeable core could form a new impermeable curtain.In addition,consolidation and impermeable grouting are conducted.All these technical measures speed up the construction progress,reduce the investment and play an important role in finishing the extension in advance.