摘要
为研究后续基坑工程对临近既有地铁区间隧道造成的影响,以厦门轨道交通某线站区间基坑支护工程及配套项目上部主体结构工程为例,通过有限元结构分析软件MIDAS GTS进行数值模拟分析,建立有限元模型来研究基坑二次开挖和上部结构建筑对盾构区间隧道产生的影响,验算围护结构及盾构隧道的变形位移,并结合现场监测数据对计算结果进行了比较分析,探究了一种基于有限元理论有效解决基坑开挖对既有地铁区间隧道可靠性的分析方法,现场监测结果表明,基坑施工对既有地铁区间隧道的影响计算结果和实际监测结果比较接近,基坑开挖对隧道的影响符合规范沉降限值要求。
In order to study the impact of the follow-up foundation pit project on the tunnels adjacent to the existing subway section,taking the foundation pit support project and the upper main structure project of the supporting project of a certain subway station section of Xiamen Rail Transit as an example,the numerical value was analyzed by the finite element structural analysis software MIDAS GTS Simulation analysis,establishment of a finite element model to study the impact of the second excavation of the foundation pit and the superstructure on the tunnel between shields,verification of the deformation and displacement of the enclosing structure and shield tunnel,and the calculation results were combined with on-site monitoring data.Through comparative analysis,we explored an analysis method based on the finite element theory to effectively solve the reliability of the excavation of the existing subway section tunnel based on the foundation pit excavation.The on-site monitoring results show that the calculation results and actual monitoring of the impact of the foundation pit construction on the existing subway section tunnel The results are relatively close,and the impact of the excavation of the foundation pit on the tunnel meets the requirements of the standard settlement limit.
作者
韩伟
王余鹏
石端文
HAN Wei;WANG Yupeng;SHI Duanwen(Fujian Forestry Vocational and Technical College,Nanping 353000;China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan 430000)
出处
《福建建筑》
2020年第7期78-84,共7页
Fujian Architecture & Construction
基金
福建省中青年教师教育科研项目(编号:JAT191258)。
关键词
基坑开挖
区间隧道
有限元
计算模型
变形位移
可靠性分析
Excavation of foundation pit
Interval tunnel
Finite element
Calculation model
Deformation displacement
Reliability analysis
