摘要
以成都地铁1号线穿越某条形基础框架结构为背景,通过有限元数值模拟,选取侧下方穿建筑物和正下方穿建筑物两个不同截面进行计算,分析盾构隧道穿越建筑施工引起的地表沉降、建筑物变形、差异沉降及建筑结构内力。研究表明:盾构穿越施工引起的建筑沉降大于设计要求,侧下方穿越建筑物情况下建筑变形较大。通过采取地面跟踪注浆措施可以有效减小盾构隧道施工引起的建筑沉降,对建筑物起到有效的保护作用。
Taking Chengdu metro Line 1,which crosses a strip foundation frame structure,as a background,this paper analyzes the surface subsidence,the building deformation,the differential settlement and the internal force of building structure.By using the finite element numerical simulation,this paper choses two different sections for calculation:one is crossed from the side bottom of the building,the other is crossed from the right bottom of the building.The results show that the building subsidence caused by shield tunneling is more than the design requirement.It is necessary to reduce the building subsidence by tracing the grouting,which can effectively protect the building.
出处
《城市轨道交通研究》
北大核心
2009年第9期47-51,共5页
Urban Mass Transit
关键词
盾构隧道
条形基础
差异沉降
结构内力
shield tunneling
strip foundation
differential settlement
internal force
