摘要
基坑开挖对既有隧道的影响作用已成为近年来城市快速发展过程中所出现的新型问题。如何控制与减小基坑施工期间所引起的既有隧道变形至关重要。本文于此背景下建立了数值计算模型,并从影响既有隧道变形的各种因素分析入手,研究分析基坑开挖对既有隧道衬砌的变形影响。论文通过ANSYS软件模拟基坑开挖施工,获得了隧道水平以及竖直方向上的位移变形沿隧道纵轴的变化曲线,分析了基坑开挖对既有隧道所产生的位移影响,并基于结论提出了减小隧道变形的施工控制措施。
With the development of city, a new problem which arose is the influence of foundation excavation on existing tunnel. Consequently, how to predict and control the displacement of the existing tunnels becomes crucial. In this context, starting with the various influential factors of existing tunnel de- formation, this paper analyzes the deformation influence of construction of adjacent foundation by setting up a numerical calculation model. Through the research of ANSYS simulation, we achieve the change curve of the displacements of horizontal and vertical along the longitudinal axis of tunnel, the displace- ment impact on existing tunnel are analyzed. Based on the conclusion, it proposes some measures to minimize the tunnel＇s deformation.
出处
《低温建筑技术》
2014年第7期108-110,共3页
Low Temperature Architecture Technology
关键词
深基坑开挖
地铁隧道
变形
数值模拟
deep excavation
tunnel
deformation
numerical simulation
