六盘山隧道软弱围岩快速施工工艺

摘要

Combining with the Ⅴ-grade surrounding rock engineering characteristics of Liuoanshan tunnel,the oaoer mainly introduces the fast construction scheme and technology demands of weak surrounding rock tunnel. According to engineering oractice,it soecifically introduces the technological features,technological orincioles and construction technologies of three-stair and seven-steo excavation method,which has certain guiding value for similar tunnel construction.%结合六盘山隧道Ⅴ级围岩的工程特点，着重介绍软弱围岩隧道快速施工方案及技术要求，通过工程实践，详细地介绍了三台阶七步开挖法施工的技术特点、工艺原理、施工工艺等，对类似隧道施工有一定的参考价值。