大跨度上承式铁路钢桁梁悬臂架设施工技术研究  

Research on Construction Technology of Cantilever Erection of Large Span Through Type Railway Steel Truss

作　　者：赵前进[1,2] 李敬伟[2] ZHAO Qianjin;LI Jingwei(Central South University,Changsha 410083,China;China Railway Kunming Group Co.,Ltd.,Kunming 650011,China)

机构地区：[1]中南大学,长沙410083 [2]中国铁路昆明铁路局集团公司,昆明650011

出　　处：《铁道标准设计》2021年第1期76-80,共5页Railway Standard Design

摘　　要：以玉磨铁路元江双线特大桥(108+151.5+249+151.5+108) m上承式连续钢桁梁为例,该桥跨越红河深切河谷,山高坡陡沟深,现场地形地貌复杂,地势高差较大,道路狭窄且急弯较多;具有结构体系新颖、辅助工程设计与施工难度大、钢桁梁悬臂架设施工安全风险高等难点,且目前国内外尚无此类上承式铁路桥施工经验可循。对该桥施工场地布置、临时墩布置、钢梁悬臂拼装方法、合龙方法等采用的钢桁梁悬臂架设技术进行系统分析,该桥已顺利合龙。This paper takes the Yuanjiang Double-Track Bridge(108+151.5+249+151.5+108)m continuous steel truss beam of Yuxi-Mohan Railway as the study objective.The bridge spans the deep river valley of Honghe River,accompanied by steep mountain slope,deep gully,complex site topography,large terrain height difference,and narrow and sharp turn roads.The bridge is characteristic of novel structure system,difficult aided engineering design and construction,and higher safety risk in cantilever erection of the steel girder construction.At present,there has been no construction experience of such upper bearing railway bridge at home and abroad.This paper conducts a systematic analysis of the site layout,temporary pier arrangement,method of cantilever assembly and beam closure by means of cantilever erection of the steel truss beam.The bridge has been closed successfully.

关 键 词：铁路桥 大跨度钢桁梁桥 上承式钢桁梁 悬臂架设法 施工 

分 类 号：U448.211[建筑科学—桥梁与隧道工程] U445.466[交通运输工程—道路与铁道工程]