大跨度地铁车站主体结构施工动力响应与优化措施研究  

Research on Dynamic Response and Optimization Measure of the Main Structure Construction of Large Span Subway Station

作　　者：刘军涛 LIU Juntao(Shaanxi Huashan Road and Bridge Group Co.,Ltd.,Xi’an,Shaanxi 710026,China)

机构地区：[1]陕西华山路桥集团有限公司,陕西西安710026

出　　处：《施工技术(中英文)》2025年第3期101-107,共7页Construction Technology

摘　　要：大跨度地铁车站结构体系复杂,施工难度大,为研究大跨度盖挖逆作地铁车站主体结构施工动力响应,采用数值模拟计算方法分析水平位移、竖向位移和剪应力变化规律,并给出基坑开挖和主体结构施工优化措施。研究结果表明,随着施工的进行,车站主体结构发生挤压变形,水平位移与竖向位移均满足要求;车站主体结构剪应力以中轴线为基准呈对称分布,且随着基坑开挖深度的增加而增大;与其他施工阶段相比,临时立柱拆除时车站主体结构水平位移和竖向位移均达到最大。通过采用基坑分层分段开挖、施工过程监测、混凝土配合比优化等措施,保证施工安全,减小施工影响。The structural system of large span subway stations is complex and the construction difficulty is high.In order to study the construction dynamic response of the main structure of large span cover and cut⁃top down subway stations,numerical simulation calculation methods are used to analyze the changes in horizontal displacement,vertical displacement and shear stress,and optimization measures for foundation excavation construction and main structure construction are proposed.The research results show that as construction progresses,the station main structure undergoes compression deformation,and both horizontal and vertical displacements meet the requirements.The shear stress of the station main structure is symmetrically distributed based on the central axis,and increases with the depth of construction of the foundation excavation.Compared with other construction stages,the removal of temporary pillars resulted in the maximum horizontal and vertical displacement of the station main structure.By adopting measures such as layered and segmented construction of foundation excavations,monitoring of construction processes,and optimization of concrete mix proportions,construction safety is ensured and construction impacts are reduced.

关 键 词：地铁车站 主体结构 基坑 剪应力 数值模拟 

分 类 号：U231[交通运输工程—道路与铁道工程]