下穿城市轨道交通车辆段道路隧道基坑支护工程变形监测及分析

Monitoring and Analysis of the Deformation of the Foundation Excavation Supporting System for a Tunnel Project Underneath a Depot of the Urban Rail Transit

以某下穿城市轨道交通车辆段道路隧道基坑工程为例,阐述了该隧道基坑开挖的变形监测过程,对基坑支护结构水平位移、沉降、周边建筑物沉降、地下水位、支撑轴力等项目的变形情况进行分析,根据监测数据反映出来的规律,及时掌握施工环境变化,确保城市轨道交通车辆段施工安全。

Based on the background of a foundation excavation for a road tunnel engineering underneath a depot of the urban rail transit, the deformation monitoring system and processes are elaborated in this paper. The monitored paramaters, e.g., horizontal displacement, settlement, surrounding building settlement, groundwater level, and sup- porting axial force, are comprehesively analyzed to reveal the underlying principles. As a result, the fluctuation and variation of the construction environment and conditions can be also handled in time to ensure the safety of urban rail transit depot during the construction of beneath foundation excavation.