摘要
江(门)罗(定)高速公路大石岭隧道因围岩破碎,施工期间正值雨季,连月大雨,使雨水往下渗,岩体遇水膨胀软化,导致隧道初支严重变形,侵入二衬界限内。为保证隧道的施工质量和安全,采用回填土反压初期支护,中管棚、小导管注水泥浆固结围岩,然后替换原有初期支护。
As for Dashiling Tunnel of Jiang （men ） - Luo （ding） Expressway, severe deformation of and intruding into the lining scope of the initial support occurred due to its weak and broken surrounding rock, which became swelling and softening with water seeping through from months of heavy rain during the construction. In order to ensure the construction quality and safety of the tunnel, backfilling to support the initial support and strengthening the surrounding rock with middle pipe shed and small pipe grouting have been carried out, then the original initial support has been replaced.
出处
《广东公路交通》
2016年第4期97-100,共4页
Guangdong Highway Communications
关键词
隧道工程
变形侵限
注浆加固
换拱
tunnel engineering
limit deformation
brouting reinforcement
replacing arch
