一、前言以充分发挥围岩自身承载能力为基本原理,以锚杆喷混凝土支护及柔性内衬砌为主要特征的新奥法(New Austrian Tunnelling Method),在许多国家已作为标准方法而普遍采用。我国公路隧道也在开始采用这一新技术。如图1所示,新奥法并不仅仅是用锚喷柔性支护来代替传统的整体式厚壁模筑衬砌,它在设计的基本概念上也与传统方法不同。即按传统设计思想,支护结构是用来支撑由开挖引起的山体松弛岩体的,所以在传统设计中,松 I. Preface Taking the basic principle of fully exerting the bearing capacity of the surrounding rock itself, the New Austrian Tunnelling Method, which is mainly characterized by shotcrete supporting and flexible lining, has been adopted as standard method in many countries . China’s road tunnel is also beginning to adopt this new technology. As shown in Fig. 1, the new Austrian law not only replaces the traditional monolithic thick-wall construction with flexible support for anchor injection, but also differs in its basic concept from the traditional method. That is, according to the traditional design concept, the supporting structure is used to support the rock slab caused by excavation of the mountain, so in the traditional design, pine