长江大堤巨厚粉细砂层混凝土防渗墙施工

Construction of Yangtze River levee thick silty sand layer concrete cut-off wall

湖北省监利县段长江大堤作为塑性混凝土防渗墙施工的试验段,国内首次将纵向封闭式塑性混凝土防渗墙作为堤防防渗工艺,解决大堤内侧农田及村落的管涌险情。该工程地层以巨厚的粉细砂层为主,防渗墙厚度薄、深度深,接近最新修订的防渗墙施工技术规范(SL 174—2014)对应墙厚的极限值,防渗墙在施工过程中,针对主要工序采取的措施,成功解决了施工中出现的困难。

Hubei Jianli County segment Yangtze River levee is regarded as the test section of plastic concrete cut-off wall construction. Longitudinal closed plastic concrete cut-off wall is regarded as levee seepage control technology for the first time in China,thereby solving the piping risk of farmland and village inside the levee. The project formation is mainly composed of thick silty sand layer. Anti-seepage wall is characterized by thin thickness and deep depth,which are similar to the extreme value of corresponding wall thickness in the latest revision of anti-seepage wall construction technical specification（ SL 174-2014）. Measures are adopted aiming at main procedures for successfully solving the difficulties during construction.