深大基坑突涌水应急处理技术研究

Research on Emergency Treatment Technology for Water Inrush in Deep and Large Foundation Pit

随着我国城市化建设进程的不断加快,地铁深大基坑开挖项目不断增多,深大基坑突涌水事故为基坑开挖及地铁施工带来巨大阻碍。文章以广州某灰岩区深大基坑项目为例,讨论主要采取“涌水应急抢险+钻孔施工+改性砂浆和水泥黏土膏浆施工”的方法,实现基底绕流涌水封堵,旨在为我国地铁基坑开挖施工突涌水封堵提供实践经验。

With the continuous acceleration of urbanization construction in China,the number of subway deep and large foundation pit excavation projects is increasing,and the water inrush accident in deep and large foundation pit has brought great obstacles to foundation pit excavation and subway construction.Taking a deep and large foundation pit project in a limestone area of Guangzhou as an example,this paper discusses to mainly adopt the method of"emergency water inrush rescue+drilling construction+modified mortar and cement clay paste construction"to realize the blocking of water inrush around the basement,aiming to provide practical experience for the blocking of water inrush in the excavation construction of subway foundation pits in China.