摘要
目前越来越多的深大基坑项目在既有隧道的附近施工,既有隧道的安全成为需要关注的重要问题。通过建立有限元模型,对基坑外不同位置处隧道变形特点以及位移影响区划分进行分析。计算结果表明:基坑开挖对隧道的水平位移影响要比对竖向位移的影响更加剧烈,随距基坑的距离增加影响逐渐减小,并且根据隧道变形的控制准则划分了隧道影响区范围。
As more and more large and deep excavation projects are constructed near by the existing tunnels,the safety of existing tunnels become an important issue needed attention. The deformation characteristics of the tunnel and the influence range caused by excavation are analyzed through FEM modeling. The calculation results show that the effect of horizontal displacement of the tunnels is more intense than vertical displacement,and the influence decreases gradually with the distance from the excavation increasing. According to the control criterion of tunnel deformation,the influence range is divided.
出处
《施工技术》
CAS
北大核心
2017年第S2期1094-1099,共6页
Construction Technology
基金
天津市建委科技项目(2014-9
2017-15)
关键词
基坑开挖
既有隧道
变形特性
影响区
excavation
existing tunnel
deformation characteristics
influence range
