摘要
采用数值计算和监控量测方法对六车道双连拱隧道施工过程进行分析,得到了施工过程中围岩的变形和支护结构的受力状态。结果表明,随着开挖的推进,围岩变形和支护结构受力较大的部位均是中隔墙的上方以及左、右洞外侧边墙。因此,在类似工程设计施工过程中,应加强此部位的支护参数和施工质量。软弱地层条件下六车道双连拱隧道的中隔墙底部底鼓严重,应加强对中隔墙底部的加固措施,必要时可开挖一定深度施做浅基础。
This paper presents the numerical analysis and construction monitoring results of a six-lane double arch expressway tunnel. The surrounding rock mass deformation and the stress in the supporting structures are estimated by numerical analysis and verified throughout the construction monitoring. The results indicate that, during the tunnel excavation, the largest deformation and the highest stressed locations are at the top of median wall and the outer wall at both sides. As a results, special strengthening design is required at these locations. In soft soils, the median wall of the double arch tunnel might experience heaving and improvement measures are necessary.
出处
《土工基础》
2016年第3期345-348,共4页
Soil Engineering and Foundation
关键词
双连拱隧道
围岩
数值计算
施工监测
Double-Arched Tunnel
Surrounding Rock Mass
Numerical Analysis
Construction Monitoring
