云南水力发电2024，Vol.40Issue(4)：122-124,129,4.DOI:10.3969/j.issn.1006-3951.2024.04.029
含软弱夹层的隧道洞口边坡稳定性分析
Stability Analysis of Tunnel Entrance Slopes Containing Weak Interlayers
摘要
Abstract
The weak interlayer has a prominent impact on the stability of the slope and is a potential sliding surface of the slope.In order to study the stability of tunnel entrance slopes containing weak interlayers during excavation and tunnel excavation,MIDAS GTS/NX software was used to simulate the entire construction process,and the stability coefficient of the entrance slope was calculated using Strength Reduction Method(SRM).The results indicate that excavation construction at the entrance of the tunnel will disrupt the original stress balance,leading to tension cracks in the soil at the top of the slope.During tunnel excavation construction,the stability coefficient of the entrance slope will decrease with the excavation process.Considering the vibration caused by tunnel blasting construction and the adverse factors of weak interlayers,it is recommended to increase the length of anchor rods to 10 m in engineering design and construction to control the creep and sliding of weak interlayers and prevent slope instability.关键词
软弱夹层/洞口边坡/开挖施工/有限元模拟Key words
weak interlayer/slope at the entrance of tunnel/excavation construction/finite element simulation分类
建筑与水利引用本文复制引用
武靖勋..含软弱夹层的隧道洞口边坡稳定性分析[J].云南水力发电,2024,40(4):122-124,129,4.基金项目
四川省高校工程研究中心开放基金项目(SC-FBHT2022-06) （SC-FBHT2022-06）
