双层小导管超前支护在杨白线杨树庄隧道浅埋洞口段施工中的应用

The Application of Two-layered Small Ductule Advanced Support in Yangshuzhuang Tunnel Shallow Buried Hole Section Construction of Yangbai Line

结合杨白线杨树庄隧道工程实例,介绍了隧道浅埋洞口段采用双层小导管超前支护的施工方法,并对其工艺进行了详细阐述,实践证明,该施工方案在隧道浅埋洞口段对围岩起到很好的加固作用,保证隧道安全顺利的施工。

Combined with Yangshuzhuang tunnel engineering examples of Yangbai line, this paper introduced the construction method of using two-layered small ductule advanced support in the tunnel shallow buried hole section. It also elaborated its process in detail. The practice proved that the construction scheme had very good reinforcement effect of surrounding rock in the tunnel shallow buried hole section and guaranteed safe and smooth tunnel construction.