盾构隧道穿越条基框架结构影响研究  

Shield Tunneling Influence on Strip Foundation Frame Structure

作　　者：王春凯[1] 许恺[1] 周冠南[1] 侯刚[2] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海硕士研究生200092 [2]中铁十三局集团第二工程有限公司,深圳518083

出　　处：《城市轨道交通研究》2009年第9期47-51,共5页Urban Mass Transit

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.

关 键 词：盾构隧道 条形基础 差异沉降 结构内力 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]