穿越沈阳站既有站房地下通道施工技术  

CONSTRUCTION TECHNIQUE OF UNDERGROUND PASSAGE PASSING THROUGH EXISTING STATION BUILDING OF SHENYANG RAILWAY STATION

作　　者：庞小军[1] 苏浩[2] 

机构地区：[1]中铁建工集团有限公司北京分公司,北京100070 [2]北京市建筑工程研究院有限责任公司,北京100039

出　　处：《建筑技术开发》2014年第4期24-28,共5页Building Technology Development

摘　　要：沈阳站既有东站房下穿地下通道,工程采用MIDAS有限元分析软件建立托换体系三维实体模型,模拟分析既有桩基上部柱荷载传递至托换体系的变形,并对因通道开挖造成基坑底部土体应力卸载从而引起地铁结构整体产生向上位移进行了模拟分析。施工中通过设置托换体系,即设置托换桩及托换梁、板结构,分层盖挖土方和分段施工通道主体结构等施工措施,确保了下部地铁运营安全,为类似工程施工提供借鉴。An underground passage project passes through the existing station building of Shenyang Railway Station. In this project, finite element analysis software MIDAS is used to establish three - dimensional model for the underpinning system and to simulate and analyze the deformation caused by the upper column load on existing pile foundation to the underpinning system, stress unloading of foundation pit bottom soil due to excavation and upward displacement of whole subway structure. During construction, underpinning system is erected, namely setting underpinned pile, underpinned beam and plate structure, covered excavation in different layers, subsection construction of main pas- sage body, etc. , to guarantee safe operation of subway. Valuable references are provided for similar project.

关 键 词：桩基托换 盖挖 地下通道 既有建筑 沉降 上浮 

分 类 号：TU94[建筑科学—建筑技术科学]