天津建设科技2025，Vol.35Issue(4)：21-24,4.DOI:10.3969/j.issn.1008-3197.2025.04.006
基坑开挖方式对既有下卧地铁隧道变形的影响研究
The Influence of Foundation Pit Excavation Methods on Deformation of Existing Underlying Subway Tunnel
摘要
Abstract
To investigate the influence of foundation pit excavation methods on the deformation of existing underlying subway tunnels,a three-dimensional strata-tunnel-foundation pit analysis model was established using the MIDAS GTS NX finite element software,focusing on a proposed deep and large foundation pit excavation di-rectly above a shield tunnel in Tianjin.By comparing two excavation schemes—conventional excavation with-out ground reinforcement and excavation with depth zoning combined with portal-type reinforcement using ce-ment-mixing piles—the study analyzes the effects of foundation pit excavation on the horizontal and vertical deformation as well as longitudinal differential settlement of the tunnel.The results indicate that conventional excavation without reinforcement caused tunnel deformations exceeding control limits,while the reinforce-ment scheme effectivelled controls tunnel deformations,ensuring compliance with requirements.关键词
盾构隧道/基坑开挖/地层加固Key words
shield tunnel/foundation pit excavation/stratum reinforcement分类
建筑与水利引用本文复制引用
李永波,张家威,赵歆,徐少云..基坑开挖方式对既有下卧地铁隧道变形的影响研究[J].天津建设科技,2025,35(4):21-24,4.基金项目
南通市自然科学基金和社会民生科技计划项目(MSZ2023055)、南通市社会民生科技计划项目(MSZ2023108、MSZ2024078)、江苏工程职业技术学院校级教学改革研究课(GYJY202328) （MSZ2023055）
