大断面黄土隧道施工技术分析

Analysis of the Construction Technology of Large Section Loess Tunnel

以甘肃平天路天水2^#隧道工程为例,基于黄土隧道的特点及该工程的施工难点,决定使用台阶法进行隧道挖掘,并围绕黄土隧道施工技术进行了详细探讨,包括套拱及管棚施工、初期支护等环节,最终取得了良好的施工效果.

Taking Tianshui 2#Tunnel Project of Pingtian Road in Gansu Province as an example,based on the characteristics of the loess tunnel and the construction difficulties of the project,the benching tunnelling method was adopted to excavate the tunnel.The construction technology of the loess tunnel was discussed in detail,including arch sleeving,pipe shed construction,initial support and so on.Finally,good construction results were achieved.