摘要
随着中国超长隧道的建设,难免会穿越不同构造地层以及一些软弱夹层、断层。软弱夹层本身是一种结构松散、力学性能弱、易变性强存在不同岩层之间的弱性地质结构,在隧道施工过程中,开挖扰动对原岩造成了应力重分布,使得软弱夹层处在不稳定或欠稳定状态,对隧道施工安全具有潜在威胁。因此,通过三维数值计算分析的方法,对跨软弱夹层隧道开挖扰动过程中结构不同部位的应力分布规律以及变形规律进行分析,基于应力、位移分布特征对隧道施工过程提出针对性支护措施,为隧道开挖稳定性研究提供参考。
With the construction of Super long tunnel,different structural strata as well as some weak interlayers and faults inevitably pass through.The soft interlayer itself is a kind of weak geological structure with loose structure,weak mechanical properties and strong variability between different layers.In the process of tunnel construction,excavation disturbance causes stress redistribution to the original rock,which makes the weak interlayer in unstable,which has potential threat to the safety of tunnel construction.Therefore,by using the method of three-dimensional numerical analysis,tunnel excavation disturbance across the weak intercalated structure stress distribution and deformation law of different parts are analyzed。Based on the characteristics of stress and displacement distribution,targeted support measures are put forward for the tunnel construction process,and provides a reference value for the study of the stability of tunnel excavation.
作者
王智
黄承忠
江立群
WANG Zhi;HUANG Chengzhong;JIANG Liqun(CMCU Engineering Co.,Ltd.,Chongqing 400039,China;Chongqing CCTEG Engineering Technology Consulting Co.,Ltd.,Chongqing 400042,China)
出处
《科技和产业》
2023年第5期228-233,共6页
Science Technology and Industry
关键词
软弱夹层
隧道
开挖扰动
应力分布
变形规律
weak interlayer zone
tunnel
excavation disturbance
stress distribution
deformation law
