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新奥法是在利用围岩本身所具有的承载效能的前提下,采用毫秒爆破和光面爆破技术,进行全断面开挖施工,并以形成复合式内外两层衬砌来修建隧道的洞身,即以喷混凝土、锚杆、钢筋网、钢支撑等为外层支护形式,称为初次柔性支护,系在洞身开挖之后必须立即进行的支护工作。
The new Austrian law is the use of the surrounding rock itself has the bearing capacity of the premise, the use of millisecond blasting and smooth blasting technology, full-face excavation construction, and to form a composite inner and outer lining to build the tunnel tunnel body, that is Sprayed concrete, bolt, steel mesh, steel support for the outer support form, known as the first flexible support, Department of excavation in the hole must be carried out immediately after the support work.