砂卵石地层超深防渗墙工艺试验研究

Experimental study on ultra-deep cut-off wall in sandy cobble stratum

针对襄阳市东西轴线东汊干坞超深防渗墙地质环境及施工工艺要求,进行了原位工艺试验,验证了砂卵石地层超深防渗墙成槽可行性。结合工艺试验,总结出了在砂卵石易透水、易塌孔地层中进行超深防渗墙施工工艺的要点,比选确定了防渗墙墙体材料,为防渗墙施工提供了试验数据及理论支撑。

According to the geological environment and construction technology requirements of the ultra-deep cut-off wall in the east branch dry dock along the east-west axis of Xiangyang,the in-situ process test was carried to verity the feasibility of trenching ultra-deep cut-off wall in sandy cobble stratum.Combined with the process test,the key points of the construction technology of the ultra-deep cut-off wall in the sandy cobble stratum which is easy to penetrate and collapse were summarized,and the material of the cut-off wall was determined by comparison,which provides experimental data and theoretical support for the construction of the cut-off wall.