浅论预防高水头承压水地区基坑突涌的关键技术

Discussion on Key Technology Preventing Foundation Pit Surge in High Water Head Confined Water Area

基坑突涌是承压水水头顶裂或冲毁基底土体造成地基强度破坏和影响基础施工的一种不良地质现象。在高水头承压水地区,控制基坑突涌事故是基坑顺利开挖的一个重要因素。文章首先分析了基坑突涌控制的总体思路,然后从止水帷幕的选型、止水帷幕渗漏的检测、降水井的设计和运营管理等方面,介绍了预防基坑突涌的关键技术。

The foundation pit inrush is a kind of bad geological phenomenon that the foundation strength is destroyed and the foundation construction is affected by the top crack of the confined water head or the foundation soil body is destroyed. In the area of high head confined water, it is an important factor to control the surge of foundation pit. This paper first analyzes the overall idea of foundation pit surge control, and then introduces the key technologies to prevent foundation pit surge from the selection of water stop curtain, the detection of water stop curtain leakage, the design and operation management of dewatering well, etc.