摘要
城市地铁盾构施工将会对下穿地层的岩土体产生扰动,不可避免地诱发地表沉降变形。文章以深圳市某线路区间地铁盾构施工为研究背景,通过ABAQUS数值分析软件建立三维数值分析模型,研究不同的盾构顶进压力和注浆压力对隧道地表沉降的变形规律。研究结果表明:在掘进压力不变的条件下,盾构施工在纵向的沉降值随着距离的增加逐渐减小,并趋于稳定;掘进压力和注浆压力的增加对于隧道沉降值控制效果较为显著;过大的掘进压力和注浆压力将会导致地表发生隆起变形。研究结论可为类似工程提供参考。
The construction of urban subway shield tunnels can disturb the underlying geological formations,inevitably inducing surface settlement and deformation.This paper takes a section of a subway tunnel construction project in Shenzhen as its research context.By employing the ABAQUS numerical analysis software,a three-dimensional numerical analysis model is established to investigate the deformation patterns of tunnel-induced surface settlement under varying shield tunneling face pressures and grouting pressures.The research findings reveal the following:Under constant tunneling face pressure,the longitudinal settlement values decrease gradually with increasing distance and tend to stabilize;Increasing tunneling face pressure and grouting pressure have a significant effect on controlling tunnel-induced surface settlement;Excessive tunneling face pressure and grouting pressure can cause surface uplift deformation.The conclusions drawn from this study can serve as a reference for similar engineering projects.
作者
张卓军
ZHANG Zhuojun(Shanghai Metro Consulting and Supervision Technology Co.,Ltd.,Shanghai 200000,China)
关键词
沉降值
盾构施工
掘进压力
注浆压力
settlement value
shield tunneling construction
excavation pressure
grouting pressure
作者简介
张卓军(1968-),男,湖南沅江人,上海地铁咨询监理科技有限公司高级工程师,研究方向:地下工程与隧道工程。
