断层对小净距隧道稳定性的影响

Stability analysis of the neighborhood tunnel through the fault zone

以温州市苍南县大坪尾隧道小净距穿越断层地带为工程背景,以Ⅲ级围岩为研究对象,建立隧道与断层区域斜交的数值模型。通过分析隧道断面中断层破碎带不同位置和面积大小对隧道围岩位移的影响,得到小净距隧道在穿越断层带时围岩位移的变化规律。该研究结果可为今后同类型工程施工提供参考和借鉴。

The numberical model between the tunnel and the oblique fault area is estab- lished, and the grade Ⅲ rock wall as a study object, Wenzhou Cangnan county neigh- borhood tunnel crossing the fault zone is regarded as the engineering background. The effects of the area on disaplacement of the sorrunding rocks by the different location and the size of the fault fracture zones is analysed. The small clear distance tunnel across the fault zone of surrounding rock displacement is obtained.The results can provide a reference for future similar engineering construction.