摘要
洞口开挖破坏了原有的稳定状态,加之洞口段围岩条件的复杂性,极易造成洞口段岩层的失稳。结合不良地质条件下某隧道洞口开挖时覆盖层坍塌的情况,通过对洞口段处治过程进行分析,提出了洞口失稳的综合治理方案,取得了较好的效果。可供同类隧道地质灾害处理借鉴和参考。
The steady state is changed during the tunnel portal excavation. And the instability of surrounding rock is easy to occur at the tunnel portal with complex geological conditions.Based on a tunnel portal construction at special geometrical place,the collapse of the reasons and process before the reasonable measures are taken has been analyzed,which can be referred to other tunnels in the undergoing construction of highway,and in the similar situations of excavation of tunnel portals.
出处
《四川建材》
2015年第6期139-141,共3页
Sichuan Building Materials
关键词
公路隧道
洞口段
不良地质
处治技术
highway tunnel
tunnel portal
unfavorable geology
treatment technology
