市政技术2024，Vol.42Issue(5)：92-103,12.DOI:10.19922/j.1009-7767.2024.05.092
断层破碎带形态对隧道围岩变形影响研究
Study on the Influence of Fault Fracture Zone Morphology on Tunnel Surrounding Rock Deformation
廖秋林 1蒋坪临 2武福美 1张亚鹏 3徐嘉彬 3宋国奥3
作者信息
- 1. 北京城建设计发展集团股份有限公司,北京 100037||北京城建轨道交通建设工程有限公司,北京 102600
- 2. 北京城建设计发展集团股份有限公司,北京 100037
- 3. 中国矿业大学(北京)力学与建筑工程学院,北京 100083
- 折叠
摘要
Abstract
Because of the characteristics of surrounding rock crushing,low intensity,fault fracture zone is easy to cause large deformation of tunnel surrounding rock,thus induce engineering disasters.Therefore,based on the Yun-wushan Tunnel project of Bitong Line of Chongqing suburban railway,PLAXIS3D numerical analysis software was used to establish the calculation model of tunnel through different fault fracture zones.The calculation results show that the dip angle and thickness of fault fracture zone have significant influence on the deformation of tunnel sur-rounding rock,while the angle between fault strike line and tunnel axis has little influence.With the increase of the dip angle of the fault fracture zone,the range affected by the fault fracture zone obviously reduce,and the vertical and horizontal displacement values of the tunnel surrounding rock gradually reduce.When the dip angle of the fault fracture zone is 90 °,the range affected by the fault fracture zone is the smallest;With the increase of the thickness of the fault fracture zone,the range affected by the fault fracture zone increases,and the vertical and horizontal dis-placement values gradually increase and reach the maximum value when the thickness of the fault fracture zone is 22 m.The deformation control effect of surrounding rock will be better when the tunnel crosses the weak part of the fault fracture zone.The research results can provide some reference for the design and construction of mountain tunnel through fault fracture zone.关键词
断层破碎带/隧道围岩变形/数值分析/断层形态/竖向位移/水平位移Key words
fault fracture zone/tunnel surrounding rock deformation/numerical analysis/fault morphology/vertical displacement/horizontal displacement分类
交通工程引用本文复制引用
廖秋林,蒋坪临,武福美,张亚鹏,徐嘉彬,宋国奥..断层破碎带形态对隧道围岩变形影响研究[J].市政技术,2024,42(5):92-103,12.
