跨越运营高铁的铁路钢箱梁桥顶推施工风险分析  

RISK ANALYSIS OF JACKING CONSTRUCTION OF RAILWAY STEEL-BOX GIRDER BRIDGE FOR A RAILWAY CROSSING EXISTING HIGH-SPEED RAILWAY

作　　者：王春生[1] 唐友明[1] 崔文科[1] 刘冬冬[1] 

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,西安710064

出　　处：《钢结构》2015年第4期34-39,共6页Steel Construction

基　　金：交通运输部应用基础研究项目(2014319812080);中央高校基本科研业务费专项资金创新团队项目(2013G3212002)

摘　　要：大西客专联络左线特大桥连续跨越已投入运营的郑西高速铁路,采用顶推法施工,钢箱梁在钢厂分节段预制,运至施工现场节段拼装,根据施工现场情况采用专家调查法确定施工风险,并采取相应控制措施。对钢箱梁顶推全过程进行有限元数值分析,并结合现场线形和应力监测,对顶推施工全过程进行实时监控,保证施工安全。研究成果对首次跨越运营高速铁路顶推施工钢箱梁桥提供了技术支持,积累了工程经验。The steel-box girder bridge for Daxi passenger railway line is crossing above three existing railways, the jacking method was used to erect this bridge, The sections of steel-box girder were precast in steel mills, then the sections were transported to the construction site to he assembled. Whose construction risk was determined based on the engineering background through expert investigation method, and the corresponding control measures were also taken. In order to have a real time monitoring and ensure the safety of the construction, the finite element analysis was done for the whole process of the jacking construction and the deformation and stress of the steel-box girder bridge were monitored. The achievements could provide some important references for the jacking construction of similar steel-box girder bridges,

关 键 词：钢箱梁 高速铁路 顶推施工 风险分析 施工监控 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]