1问题的提出从隧道施工实践可知,采用柔性结构作为隧道支护,容许考虑支护与周围地层的共同作用,从而调整作用在支护上的地层压力,降低对支护承载能力的要求。采用矿山法开挖隧道时,上述情况在新奥法施工工艺中表现得最充分。在此 1 PROBLEM PROBLEM From the tunnel construction practice, we can see that adopting the flexible structure as the tunnel support allows the joint action of the support and the surrounding strata to be considered, so as to adjust the formation pressure acting on the support and reduce the requirement for the support load capacity. When using the mining method to excavate a tunnel, the above situation is most fully demonstrated in the construction of the new Austrian law. here