摘要
为揭示深埋软岩螺旋隧道地应力场分布规律,依托老营盘1号隧道,基于现场实测数据,建立三维地质模型,依据多元线性回归理论反演隧址区地应力场。研究表明:基于多元回归分析法的原岩应力反演结果与实测结果对比,误差在10%以内,可用于螺旋隧道地应力场反演;隧址区地应力场主要受水平构造应力作用,并由构造应力和自重应力共同组成的高地应力场;隧址区最大主应力方向与隧道轴线方向夹角变化较大,夹角范围在28.4°~88.9°之间,极差为60.5°,应根据该夹角对各段受挤压构造作用影响最大的部位进行加固。
In order to reveal the distribution law of in-situ stress field of deep-buried soft rock spiral tunnel,based on the Laoyingpan No.1 tunnel,a three-dimensional geological model was established based on the field measured data,and the in-situ stress field of the tunnel site was inverted according to the multiple linear regression theory.The results show that the error between the inversion results of the original rock stress based on the multiple regression analysis method and the measured results is less than 10%,which can be used for the inversion of the in-situ stress field of the spiral tunnel.The in-situ stress field of the tunnel site is mainly composed of horizontal tectonic stress and high in-situ stress field composed of tectonic stress and gravity stress.The angle between the direction of the maximum principal stress in the tunnel site and the direction of the tunnel axis varies greatly.The angle range is between 28.4°and 88.9°,and the range is 60.5°.According to this angle,the parts of each section that are most affected by the extrusion structure should be reinforced.
作者
冯建平
Feng Jianping(China Railway Urban Development Investment Group Co.,Ltd.,Chengdu Sichuan 610000,China)
出处
《山西建筑》
2026年第2期157-160,193,共5页
Shanxi Architecture
关键词
螺旋隧道
初始地应力场
现场测试
数值模拟
多元回归分析
spiral tunnel
initial geo-stress field
on-site testing
numerical simulation
multiple regression analysis
