软弱富水地层邻近既有隧道深基坑围护设计

Design of Bracing Structure of Deep Foundation Pit Adjacent to Existing Tunnel in Weak Water Rich Stratum

针对软弱富水地层,为了确保旁侧基坑的施工不会影响周边既有隧道的正常运营及使用寿命,提出一套软弱富水地层邻近既有隧道的深基坑围护设计方案。现场监测数据表明,该深基坑围护实际方案保证基坑开挖对隧道的影响处于控制标准内,验证了本围护设计方案的可行性。

Aiming at weak water rich stratum,in order to ensure that the construction of the side foundation pit will not affect the normal operation and service life of the surrounding existing tunnels,a set of deep foundation pit bracing structure design scheme for the weak water rich stratum adjacent to the existing tunnels is put forward.The field monitoring data show that the actual scheme of deep foundation pit bracing structure ensures that the influence of foundation pit excavation on the tunnel is within the control standard,which verifies the feasibility of the design scheme.