浅埋暗挖隧道施工过程数值模拟分析  

Numerical Simulation Analysis of the Construction Process of Shallow Tunnels Excavated from the Underground

作　　者：何桥[1] 叶明亮[1] 田凯[2] 苟巧妮 

机构地区：[1]贵州大学资源与环境工程学院,贵州贵阳550025 [2]贵州大学教育部喀斯特环境与地质灾害防治重点实验室,贵州贵阳550025

出　　处：《水利与建筑工程学报》2015年第6期36-41,共6页Journal of Water Resources and Architectural Engineering

基　　金：贵州矿山开采成灾模式及预警预报关键技术研究(黔科合重大专项[2011]6004)

摘　　要：为了分析浅埋暗挖隧道施工过程中围岩稳定性,以贵阳地铁1号线8标段浅埋隧道暗挖区间为工程背景,运用ADINA有限元软件建立二维分析模型,对隧道中隔墙法施工过程进行动态模拟。结合数值模拟结果与现场监测数据分析了施工过程中围岩应力、位移的变化情况,偏压作用及软弱夹层对隧道施工的影响。研究表明,中隔墙法施工能够很好地控制地层变形,但该法中4部开挖对拱顶、地表变形影响较大,施工时应引起重视。In order to analyze the surrounding rock stability of shallow tunnels excavated from the underground during the process of construction,the finite element software ADINA was adopted to establish a two-dimensional analytical model based on the section 8,line 1 tunnel of Guiyang metro. The construction process of the tunnel was simulated dynamically with the model. Based on the simulation results and the on-site monitoring data,the change of stress and displacement of the surrounding rocks during the construction process was analyzed,and the impact of bias voltage and weak interlayer on the construction of the tunnel was studied. The results indicate that with the middle partition method,the stratum deformation can be effectively controlled,but the partial excavation part 4has a large impact on the deformation of the vault and ground surface,hence,special attention should be paid to the construction of that part.

关 键 词：隧道开挖 ADINA 应力场 位移场 地表沉降 拱顶沉降 水平位移 监控数据 

分 类 号：U455[建筑科学—桥梁与隧道工程]