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山岭工法一般来讲是以爆破为主体,同时采用锚杆、喷射混凝土、钢拱架支护及衬砌混凝土等的隧道施工方法。山岭工法采用的前提条件是隧道从开挖到实施初期支护前,围岩应具有保持自身稳定的性能,如果不能保持围岩的自稳。则不适宜采用山岭工法。因此,软土层、未经压实的冲积层、松弛的崩积土的岩体不适宜采用山岭工法。即使是密实但伴随有地下水的涌出呈液化地层、火山泥流堆积、崩积土形成的山体,如不采用相应的辅助工法使山体得到稳定,实施山岭工法也比较困难。
In general, the mountain work method is based on blasting as the main method, and at the same time uses tunnel construction methods such as bolt, shotcrete, steel arch support and lining concrete. The prerequisites for the mountain working method are that the surrounding rock should have its own stable performance before tunneling from excavation to initial support, if it can not keep its own stability. It is not appropriate to use the mountain method. Therefore, it is not suitable for the rock mass in the soft soil layer, the unaccompacted alluvium and the loosely-collapsed soil to adopt the mountain working method. Even dense but with the groundwater gushing liquefied formation, the accumulation of volcanic mud flow, the formation of collapsible soil of the mountain, if not using the appropriate helper method to stabilize the mountain, the implementation of the mountain method is also more difficult.