地铁出入口暗挖段施工对既有结构影响分析  

INFLUENCE ANALYSIS ON EXISTING STRUCTURE CAUSED BY UNDERGROUND EXCAVATION OF SUBWAY ENTRANCES

作　　者：李瑞超 陈伟 LI Ruichao;CHEN Wei(China Railway Fifth Survey And Design Institude Group Co.,Ltd.,Beijing 102627,China;Heilongjiang Pronince Academy of Cold Area Building Research,Harbin 150080,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102627 [2]黑龙江省寒地建筑科学研究院,哈尔滨150080

出　　处：《低温建筑技术》2021年第12期155-160,共6页Low Temperature Architecture Technology

摘　　要：为研究暗挖法施工地铁出入口对既有地下通道结构的影响。通过建立地下通道和地铁车站的三维有限元分析模型,分析了不同施工阶段地下通道、车站结构及区间结构位移分布及变化规律。结果表明既有结构竖向位移大于水平位移,横向水平位移大于纵向水平位移;出入口标准段施工引起既有结构位移占总位移60%以上,是安全控制的关键阶段。The purpose of this paper is to study the influence of underground tunnel construction on the existing underground tunnel structure.The three-dimensional finite element analysis model of underground passages and metro station is established,in which the displacement distribution,law of underground passages,and metro structures with different construction stages are analyzed in details.The results show that the vertical displacement of the existing structure is greater than the horizontal displacement,and the horizontal displacement is larger than the longitudinal horizontal displacement.The displacement caused by the standard section construction accounts for more than 60%of the total displacement,therefore,the standard section construction is the key stage for safety control.

关 键 词：地铁出入口 暗挖 既有结构 三维数值分析 

分 类 号：TU441.6[建筑科学—岩土工程]