黄河小浪底水利枢纽西霞院围堰粉煤灰混凝土防渗工程施工技术

Anti-seepage construction technique of Xixiayuan cofferdam's cut-off wall by flying ash-concrete in Xiaolangdi water control project of Yellow River

西霞院反调节水库围堰工程地质条件复杂,由覆盖层和基岩层组成。地层含有大量块漂石,粒径大含量高。采用粉煤灰混凝土防渗墙垂直防渗,成槽难度极大。主要介绍采用"两钻一抓"快速成墙方法以及粉煤灰混凝成墙的经验。

The cofferdam project of Xixiayuan inverted adjustment reservoir is with a complex geologic structure,which is made up of overburden and rock.There are lots of large-sized intensive rock masses.It is very difficult to trench with the excavation of vertical anti-seepage by the cut-off wall by flying ash-concrete.This paper mainly introduced the rapid method into wall by adopting the technique of ＂two drills with one grab＂ and the experience of method into wall by cut-off wall by flying ash-concrete.