深基坑开挖对邻近双线地铁隧道变形影响实测分析

Influences of excavation of deep foundation pits on deformation of adjacent double-line subway tunnels through measurement analysis

基坑开挖卸载会导致周围土体以及邻近地铁隧道产生变形,过大的变形会严重危害地铁隧道的安全运营。为研究深基坑开挖对邻近双线地铁隧道变形的影响,以杭州某邻近已运营隧道的基坑工程为依托,结合施工现场的监测数据,对基坑开挖全过程中的基坑变形及隧道变形进行实测分析,探究基坑变形与旁侧地铁隧道变形数据的联系。

The excavation and unloading of foundation pits will lead to the deformations of the surrounding soil and the adjacent subway tunnels.The excessive deformation will seriously endanger the safe operation of subway tunnels.In order to study the influences of excavation of deep foundation pits on the deformation of the adjacent double-line subway tunnels,based on the foundation pit project adjacent to an operating tunnel in Hangzhou,combined with the monitoring data of the construction site,the deformations of the foundation pit and the tunnel during the whole process of excavation of foundation pit are measured and analyzed,and the relationship between the deformation of the foundation pit and the deformation data of the adjacent subway tunnel is explored.