深基坑局部桩间出现流砂处理技术

Treatment Technology of flowing Sand between Local piles in Deep Foundation Pit

在一些深基坑施工过程中,常会遇到流砂问题出现,造成支护边坡局部出现孔洞,严重情况还可能造成基坑周边地面塌陷、支护结构坍塌、周边建筑物倾斜等事故。文章针对北京新机场旅客航站楼及综合换乘中心(指廊)工程在深基坑桩间支护施工过程中遇到的桩间流砂问题以及所采取的处理措施进行了总结。

During the construction of some deep foundation pit, the problem of flow sand is often encountered, which causes the local occurrence of holes in the supporting side slope, which can also cause the ground collapse of the foundation pit, the collapse of the supporting structure and the inclination of the surrounding buildings. In this paper, the problems of inter-pile sand-flow encountered during the construction of deep foundation pit and the treatment measures taken are summarized in this paper.