摘要
隧道软弱围岩强度低、自稳能力差,开挖后隧道周边产生较大的松动圈,常因工程措施和施工方法不当引发初期支护变形侵限和隧道坍方等工程问题。尚岗一号隧道软岩地层主要有泥岩、砂岩等,有微膨胀性。软岩隧道施工中存在的主要问题是变形大、易坍塌、进度慢,软岩变形侵限、塌方处理时间长、安全隐患大。因此软岩隧道施工首先是控制变形和预防坍塌,其次是加快施工进度。
The weak surrounding rock of the tunnel has low strength and poor self-stability. After the excavation, there is a large loose circle around the tunnel. Engineering problems such as initial support deformation and tunnel collapse are often caused by improper engineering measures and construction methods. The soft rock strata of Shanggang No. 1 Tunnel are mainly mudstone, sandstone and so on.The main problems in soft rock tunnel construction are large deformation, easy to collapse, slow progress, soft rock deformation, long time to deal with collapse and large hidden danger of safety.Therefore, the construction of soft rock tunnel is to control deformation and prevent collapse first, and then to accelerate the construction progress.
作者
李成业
LI Cheng-ye(The 4th Engineering Co.,Ltd.of China Railway 25th Bureau Group,Liuzhou 545007,Chin)
出处
《价值工程》
2018年第16期139-141,共3页
Value Engineering
关键词
软弱围岩
变形
坍塌
预防
soft surrounding rock
deformation
collapse
prevention
