摘要
渝怀铁路歌乐山隧道出口洞顶位于滑动带 ,且出口段地层为泥夹砂岩 ,设计为V级围岩 ,进洞条件差。本文介绍了通过采用高压旋喷桩加固 ,小导管超前支护 ,超短三级台阶开挖以及监控量测等措施实现了顺利进洞 ,可供同类地质条件下隧道施工时的参考。
The crown of the tunnel at the portal of Geleshan tunnel in Yuhuai railway is situated in landslide zone and the stratum at this section is mudstone-sandstone. The rock designed is of V class. There is a poor condition for the tunnel entry. In this paper the advanced support by small pilot pipes, consolidation with high pressure bored shotcrete pile and extra short excavation on three terraces and monitoring measurement were presented for successful entry. It can serve as reference for similar tunnel construction.
出处
《地下空间》
CSCD
2002年第4期303-305,共3页
Underground Space
关键词
渝怀铁路
歌乐山隧道
洞口
滑坡
施工技术
V级围岩
portal of Geleshan tunnel
landslide
V class surrounding rock
construction technique
