西南山区公路隧道软岩大变形设计处治措施研究
Research on the design and treatment measures for large deformation of soft rock in highway tunnels in southwestern mountainous areas
周威锦 1郑国强 1李俊兵 1陈柯竹 1高美奔2
作者信息
- 1. 四川省交通勘察设计研究院有限公司,四川 成都 610017
- 2. 西华大学应急管理学院,四川 成都 610039
- 折叠
摘要
大变形作为一种常见的隧道地质灾害,是软弱围岩受挤压、褶皱、揉皱等因素共同作用产生的变形现象,处理不当会导致初支侵限、围岩失稳垮塌等灾害;为此,以西南山区高速公路典型大变形隧道为例,系统总结围岩变形特征及原因,分析变形规律,对不同大变形类型提出具有针对性的结构设计,形成系统性的软岩大变形隧道处理对策,最终应用于现场.处治效果表明隧道结构变形得到了较好的控制,其相关设计措施可供同类隧道软岩大变形处理借鉴与参考.
Abstract
Large deformation is a frequent tunnel geohazard.It is a deformation phenomenon produced by the joint action of extrusion,folding,kneading and other factors of the weak surrounding rock.Improper handling can lead to disasters such as initial support encroachment and surrounding rock destabilization and collapse.Taking the typical large deforma-tion tunnel of southwest mountain highway as an example,systematically summarize the characteristics and causes of sur-rounding rock deformation,analyze the deformation law,put forward targeted structural design for different types of large deformation,and form systematic countermeasures to deal with large deformation tunnels with soft rock,which are finally applied to the field;the effect of treatment shows that the deformation of the tunnel structure is under good control,and the relevant design measures can be used for reference and treatment of the large deformation of the soft rock of the same kind of tunnels.The relevant design measures can be used as reference for similar tunnels with large soft rock deforma-tion.
关键词
西南山区/软岩大变形/变形特征/结构设计Key words
southwestern mountainous/large deformation of soft rock/deformation behaviour/structural design引用本文复制引用
出版年
2025
NETL
NSTL
万方数据