洞桩法施工支护结构的受力特性及沉降分析  

Analysis of the Stress Characteristics and Settlement of the Supporting Structures in PBA Construction

作　　者：刘新虎 LIU Xinhu(NO.2 Engineering Co.,Ltd.of China Railway Seventh Group Co.,Ltd.,Shenyang,Liaoning Province,110000 China)

机构地区：[1]中铁七局集团第二工程有限公司,辽宁沈阳110000

出　　处：《科技资讯》2024年第18期154-156,共3页Science & Technology Information

摘　　要：采用Midas-GTS NX有限元模拟软件,建立三维模型,模拟洞桩法施工,对洞桩法地铁车站施工过程中的支护结构受力特性进行深入分析。研究涵盖了从边桩条基施工到钢管柱施工,再到扣拱施工和车站主体结构施工的整个过程。通过对拱部结构应力分析、边桩应力与沉降分析,以及钢管柱的轴力和沉降分析,揭示了施工过程中的应力转化、应力集中、应力突变和结构沉降差异性变化规律,为采用洞桩法进行地铁站施工提供技术指导。This paper utilizes the Midas-GTS NX finite element simulation software to establish a three-dimensional model to simulate Pile-Beam-Arch Approach(PBA)construction.It conducts an in-depth analysis of the stress characteristics of the support structures during the PBA construction process of subway stations.The re-search encompasses the entire construction process,from edge pile foundation construction to steel pipe column construction,to arch construction and station main structure construction.Through the analysis of the stress on the arch structure,the stress and settlement of the side piles,as well as the axial force and settlement of the steel pipe col-umns,it reveals the patterns of stress transformation,stress concentration,sudden stress changes,and the variability in structural settlement during construction,providing technical guidance for the use of PBA in subway station con-struction.

关 键 词：洞桩法施工 地铁车站 拱部结构 边桩 钢管柱 

分 类 号：U231.4[交通运输工程—道路与铁道工程]