紫金山隧道进口滑坡及山体开裂处治技术探讨

The Discussion on the Treatment Technology of Landslide and Mountain Cracking for Zijinshan Tunnel Entrance

通过对紫金山隧道进口处滑坡及山体开裂成因的分析,结合山体裂缝的监控量测结果,考虑处治效果及施工安全,主要采用反压回填的方法控制山体裂缝的发展;左线以延长明洞的方法增加反压面积;右线浅埋段采用"盖挖法"进行施工,以消除洞口滑坡体对隧道施工及运营的威胁。

Through the analysis of landslide and the cause of mountain cracking for Zijinshan tunnel entrance, and combined with the monitoring measurement results of the mountain cracking, considering the treatment effect and construction safety, this paper controlled the development of mountain cracks mainly adopted the method of back pressure backfill. It increased the back pressure area with the method of extending Open-cut tunnel for the leftline, and it also had the construction with'cover excavation'for the rightline, which eliminated the threat of the mouth of the cave landslide on the tunnel construction and operation.