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米家寨隧道是忻保高速公路中地质条件较差的隧道之一,具有明显的浅埋和偏压的特征。本文从米家寨隧道的地形地貌、地质条件等因素出发,分析了隧道洞口段大变形的发生机理,并对围岩大变形的治理措施进行了探讨。从后期的监控量测结果来看,该隧道大变形得到很好的控制,为类似工程的处理提供参考。
The Mijiazhai Tunnel is one of the tunnels with poor geological conditions in Xinbao Expressway, which has the obvious characteristics of shallow buried and biased. Based on the topography, geological conditions and other factors of Mijiazhai Tunnel, this paper analyzes the mechanism of large deformation at tunnel entrance, and discusses the treatment measures for large deformation of surrounding rock. From the monitoring results of the latter part of the monitoring point of view, the large deformation of the tunnel has been well controlled for the treatment of similar projects provide a reference.