岩溶隧道正洞绕行小断面掘进施工方法研究

Research on construction methods of main tunnel bypassing small-section tunneling in karst tunnels

通过介绍隧道正洞遭遇岩溶后,除正面处理溶腔外同时实施绕行迂回小断面掘进的施工方案,为岩溶地区修建隧道遭遇大型溶腔时能够及时恢复掘进提供了一种安全可行的处理方案,对今后同类工程的施工有一定的指导作用。

After the introduction of the main tunnel encounters the karst,the paper introduces the direct treatment of the dissolved cavity,implements the construction scheme of the bypassing small-section tunneling,and provides a safe and feasible treatment scheme to resume the tunneling when the tunnel runs across large dissolved cavity in karst areas,so as to have certain role for similar projects in future.