基坑开挖实体工程对相邻既有地铁站区间结构模拟评估分析
Evaluation and Analysis of Influence of Foundation Pit Excavation on Simulation Results of Adjacent Existing Subway Station Section Structure
王哲1
作者信息
- 1. 北京城建设计发展集团股份有限公司沈阳分公司,辽宁 沈阳 110031
- 折叠
摘要
本文采用MIDAS GTS NX有限元软件建立三维模型的方式,结合实体基坑开挖工程,模拟研究基坑开挖过程对临近地铁区间结构变形位移影响进行评估分析.结果表明:开挖基坑临近车站附属结构变形位移量整体大于车站主体和隧道区间,变形影响趋势呈平稳态势,其中竖向位移影响量大于横向位移,绝大多数影响量极值在拆除斜撑工况时产生,并且变化速率较大.研究结论可为以后类似工程提供关键工况的把控经验和技术指导.
Abstract
In this paper,the Midas GTS NX finite element software is used to establish a three-dimen-sional model.Combined with the solid foundation pit excavation project,the influence of the foundation pit excavation process on the adjacent subway section structure is simulated and analyzed,and the influence of its deformation and displacement is evaluated.The results show that the deformation displacement of the auxiliary structure of the station adjacent to the excavated foundation pit is larger than that of the main body of the station and the tunnel section as a whole,and the deformation influence trend is stable,in which the influence of the vertical displacement is greater than that of the horizontal displacement.Most of the extreme values of the influence occur when the diagonal bracing is removed,and the change rate is large.The research conclusion can provide control experience and technical guidance for similar projects in the future.
关键词
基坑开挖/既有地铁站/数值模拟/变形位移Key words
excavation of foundation pit/existing metro stations/numerical simulation/displacement due to deformation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据