长距离深大基坑开挖下卧隧道上浮控制措施研究

Research of floating control technology of the tunnel under deep excavation

基坑进行开挖时,将不可避免的对周边土层产生一定的影响,并可威胁位于土体中隧道的运营安全。以深圳某道路快速化改造明挖基坑项目为背景,通过三维数值模拟分析,研究了地基加固措施对控制隧道上浮变形的效果。结果表明,采用"门式"地基加固可有效控制隧道上浮变形。

When excavating the foundation pit,it will inevitably influence the surrounding soil layer and threaten the operation of the tunnel in the soil. Based on the rapid transformation project of a road in Shenzhen,we have studied the effect of foundation reinforcement on controlling the floating deformation of the tunnel through a 3-d numerical simulation. The results show that the "gate"foundation reinforcement can effectively control the floating deformation of the tunnel.