浅埋双连拱隧道地质灾害成因分析与整治对策

The Reasons of Geological Disaster and Treatment Measures for a Shallow Buried Double-Arch Tunnel

某浅埋双连拱隧道在右侧正洞开挖过程中,掌子面前方突发地质灾害,给隧道工程的正常开挖施工以及隧道上方地表建筑物的安全与稳定造成重大影响。针对该隧道的工程实际情况,采用有限元分析方法模拟了隧道施工力学性态,通过对隧道开挖面附近围岩位移及地表沉降等进行分析,探讨了隧道施工过程中地质灾害发生的原因,并结合工程实际提出了有效的整治对策。

A geological disaster was occurred unexpectedly on the front of excavating face,during the right hole construction for a shallow buried double - arch tunnel.It had heavily influence on the normally excavation of the tunnel and the safety - stability of the surface buildings upon the tunnel.Based on this condition,the FEM was adopted to simulate the construction mechanical behaviors of this tunnel.And then,the displacement of surrounding rockmass and the settlement of the earth's surface was analysed in order to find out the reasons for the deformation of tunnel and the cause of the geological disaster.Finally,the effective treatment measures were put forward to solve this problem.