结合工程实例,从Ⅴ级围岩黄土富水隧道的松散性、软化性,提出合理的施工对策和施工方法,即Ⅴ级围岩黄土富水隧道施工,按照“管预支、分部开挖、随挖随护、勤排水、喷闭支撑、及时成环”的原则,必须强化预注浆、台阶法留核心土、短进尺、强支护、早成环和勤量测工序。 Based on the engineering examples, from the looseness and softening of Ⅴ loess loess rich water tunnel, reasonable construction measures and construction methods are put forward, that is, Ⅴ loess loess water-rich tunnel construction, according to “pipe advance, , With digging care, drowned drainage, blasting support, timely into a ring ”principle, we must strengthen the pre-grouting, step method to leave the core soil, short footage, strong support, as early as ring and diligence measurement process.