一、施工程序在软弱围岩中修建隧道的传统施工方法是隧洞开挖后首先用木排架作为临时支护,然后再灌注混凝土衬砌作为永久支护。为了能及时架设木支撑,必须采用导坑引进,逐步扩大,分部开挖的施工方法。这种施工方法费工,费料,特别是木料消耗大;工序繁杂,劳动条件恶劣,施工进度慢;由于木支撑堵塞了隧道净空,难以使用大型施工机具 First, the construction program In the weak surrounding rock tunnel construction of the traditional method is the first after the tunnel excavation with wooden shelves as a temporary support, and then re-injection of concrete lining as a permanent support. In order to be able to set up wooden support in time, the introduction of guide pits must be adopted to gradually expand the construction method of excavations at the divisions. This method of construction work, expenses, especially the consumption of wood; complex processes, harsh working conditions, the construction schedule is slow; due to wood blockage of the tunnel clearance, it is difficult to use large-scale construction machinery