摘要
兰渝线兰广段通过板岩、碳质板岩等软岩区段的隧道极易发生大变形。在现场工程实践和试验的基础上,文章对该区段地质条件的特殊性进行了分析,并对目前隧道围岩基本分级及在施工过程中的设计变更修正进行了阐述,着重对软岩大变形隧道的围岩分级标准和选用支护参数的适宜性进行了探讨,以期能为今后同类工程提供参考和借鉴。
Tunnels located in soft rock such as slate and carbonaceous slate are susceptible to large deformations, and this is true of the Lanzhou-Guangyuan section of the Lanzhou-Chongqing railway. Based on site practice and experiments, this paper analyzes the specific geological characteristics of this section and introduces the classification of the tunnel surrounding rock and design alternatives during construction, with a focus on the standard for classification and support parameter selection process of tunnels in soft rock with large deformation.
出处
《现代隧道技术》
EI
北大核心
2012年第4期10-16,共7页
Modern Tunnelling Technology
关键词
隧道变形
围岩分级
支护参数
Tunnel with rock deformation
Classification of rock mass
Support parameter
