天津建设科技2026，Vol.36Issue(2)：76-80,5.DOI:10.3969/j.issn.1008-3197.2026.02.015
破碎板岩隧道应力监测及大变形风险分析
Stress Monitoring and Risk Analysis of Large Deformation in Broken Slate Tunnels
翟小宁1
作者信息
- 1. 中铁北京工程局集团第二工程有限公司,湖南 长沙 410116
- 折叠
摘要
Abstract
To investigate the stress variation and large deformation risk of fractured slate tunnels during excavation,this paper utilized the Dali Tree Tunnel project as a case study,employing fiber Bragg grating(FBG)sensors to monitor and analyze the three-dimensional stress of the surrounding rock.The tunnel's large deformation risk was assessed based on the strength-to-stress ratio of the surrounding rock.The results indicate that the stress variation in the surrounding rock can be divided into compressive stress zones and tensile stress zones,with stress variation absolute values yet to converge.The maximum vertical stress variation at a depth of 0.6 m in the vertical borehole under the invert reached 1.514 MPa,while at a depth of 0.5 m in the horizontal borehole of the right-sidewall,it reached 0.461 MPa.When the tunnel's burial depth exceeds 86.11 m,there is a po-tential risk of Grade Ⅲ large deformation during construction.Therefore,enhanced monitoring of surrounding rock deformation during construction is recommended.关键词
破碎板岩隧道/应力监测/大变形风险/光纤光栅传感器Key words
fractured slate tunnel/stress monitoring/large deformation risk/fiber-optic grating sensor分类
交通工程引用本文复制引用
翟小宁..破碎板岩隧道应力监测及大变形风险分析[J].天津建设科技,2026,36(2):76-80,5.
