摘要
通过有限元软件ABAQUS,分别考虑软土地区基坑的不同围护结构和管线的不同下卧层土质等因素,对悬臂式基坑工程中临近的地下管线位移进行了三维有限元模拟分析,结果表明:围护结构刚度和下卧层土质均对临近管线位移有较大影响;距基坑越近,管线变形越大;出现了地表及管线的沉降,但在基坑端角附近有管线上浮现象;基坑端角部以外2/3的基坑开挖深度范围内,管线水平和竖向位移较大,但在1.2倍的基坑开挖深度之外,开挖对管线位移影响较小.
Using Finite element software ABAQUS,considering different factors of excavation in soft soil areas,pipeline envelope layer of soil,etc.,the underground pipeline displacement nearby cantilever excavation projects is analyzed through three-dimensional finite element simulation.The results show that the envelope and the underlying layer of soil stiffness make significant impacts on the pipeline nearby,and the pipeline has more serious deformation as they are closer to excavation.At the same time the results show that the pipeline nearby the corner of the foundation pit takes on rising phenomenon though the settlement of the surface and pipeline appears.Finally this paper also shows that the pipeline beyond the range of 2/3 depth of excavation has a bigger displacement horizontally and vertically,otherwise the excavation has less impact on the pipeline displacement beyond 1.2 times depth of excavation.
出处
《天津城市建设学院学报》
CAS
2010年第4期259-263,共5页
Journal of Tianjin Institute of Urban Construction
关键词
悬臂式基坑
下卧层
地下管线
位移
三维有限元模拟
cantilever foundation
underlying layer
underground pipeline
displacement
three-dimensional finite element simulation
