探讨超大断面小净距隧道新奥法施工技术控制

Discussion on New Austrian Tunneling Technology Control of Super-large Cross-section Tunnel

在全世界新奥法已成为山岭隧道施工的主流方法,对新奥法施工过程中的各种问题进行研究势在必行。以贵阳市某环线道路3段隧道的设计和施工为依托,通过归纳出新奥法施工的基本原则、施工要点以及超大断面小净距隧道开挖方法、爆破方法、隧道洞口明暗交界里程的选择和施工等内容,总结得出在贵州为主的山地隧道,适宜采用新奥法为主的超大断面小净距隧道施工方法。以便为今后山区高速公路、市政道路等隧道施工提供经验和参考。

New Austrian Tunneling Method has become the mainstream method of mountain tunnel construction all over the world,and it is imperative to conduct research on various problems during the construction of the New Austrian Tunneling Mthod.Based on the design and construction of the third tunnel of a ring road in Guiyang City,summarizes the basic principles and key points of the New Austrian Tunneling Method,as well as the excavation method,blasting method,and distance selection of the tunnel entrance between light and dark.It is concluded that the construction method of super-large cross-section and small-distance tunnels based on the New Austrian Tunneling Method is suitable for mountain tunnels mainly in Guizhou.In order to provide experience reference for the future tunnel construction of mountain highways and municipal roads.