大峪隧道的施工

The Construction of the Dayu Tunnel

大峪隧道所贯通的大峪岭，地质复杂，软弱围岩、夹泥带、破碎带及断层多。隧道按新奥法设计，但由于过去一直沿用矿山法施工隧道的习惯，对新奥法的基本原理及优点没有充分认识和理解，特别是短台阶开挖，喷射混凝土等未能认真执行，导致发生大小塌方十数起，严重危及隧道质量及工期。本文结合施工实践的体会和总结经验，对新奥法施工的基本原则，与矿山法施工的根本区别，新奥法设计矿山法施工的后果、塌方的预防及处理等进行了论述。

Da yu mountain range is Penetrated by Da yu Tunnel,with Complex geology,poor Surrounding rock,clamping mudielt,broken belt and fault.Because of tunnel Construction had adopted habit of mine Construction method defore,in tunnel design with New Austrian Tunnelling Method,basic Principles and merit of the NATM has not been known and understand, especialy the excavation of short steps and spraying concrete Cannot be done Carefully, So more than ten times of big and small Collapses happened, it will endanger quality and time limit of tunnel Construction. The paper discuss prevention and processing of tunnel collapse, result of NATM design and mine method construction;basic principle of NATM Construction and basic difference between NATM and mine method construction in the light of experience of the Construction and Summary.