天津地区某地下五层站超深基坑设计方案研究  

Study on design of ultra-deep excavation of an underground five-story station in Tianjin

作　　者：王昌[1] Wang Chang(Railway 18th Bureau Group Corporation Limited,Tianjin 300222,China)

机构地区：[1]中铁十八局集团有限公司,天津300222

出　　处：《山西建筑》2024年第21期63-67,88,共6页Shanxi Architecture

摘　　要：以天津地铁某车站基坑为工程实例,此工程车站主体结构共地下五层,是目前国内软土地区最深的地铁车站。采用Plaxis 3D软件构建三维有限元模型,针对天津滨海地区特有的软土地质条件下的窄深基坑工程进行了模拟分析。研究了四种基坑开挖策略对基坑稳定性及变形的影响,并评估了施工过程对周围环境的潜在影响。结果表明,在天津软土地区采用全逆方案更能抑制基坑围护结构变形,以及最大程度降低对周边重要建构筑物的影响,可以为天津软土地区同类工程建设提供参考。This paper takes the excavation of a station as an engineering example.The main structure of the station has five floors underground,which is the deepest subway station in the soft soil area in China.The three-dimensional finite element model is established by using the finite element software Plaxis 3D to simulate the narrow strip deep excavation built in the typical coastal soft soil area of Tianjin.The influence of four different excavation schemes on the deformation of excavation and the influence of excavation construction on the surrounding environment are analyzed.The results show that the total inverse scheme can better restrain the deformation of the retaining structure of the excavation and minimize the impact on the surrounding important buildings in the soft soil area of Tianjin.It can provide a reference for the construction of similar projects in the Tianjin soft soil area.

关 键 词：有限元 软土 基坑 地铁 逆作法 

分 类 号：TU473.2[建筑科学—结构工程]