斜井挑顶进正洞的施工技术探讨

摘要

以银西客专庆阳隧道1号斜井进正洞的挑顶施工方案为背景,介绍了在软弱黏质黄土围岩中,斜井与正洞斜交的情况下,采用小导洞扩挖法挑顶进正洞的施工步骤及注意事项,为同类条件下的隧道施工提供参考.%By taking the roof ripping construction project of No.1 inclined shaft into the main tunnel of Qingyang Tunnel on Silver Passenger Dedicated Line as the example,the construction procedures and precautions of inclined shaft ripping roof into the main tunnel by the small tunnel excavation method are introduced in condition of the skew of incline shaft and main tunnel in the soft clay loess surrounding rock.And it provides the reference for the tunnel construction in similar conditions.