全焊接钢桁梁斜拉桥主梁整节段施工技术.pdfVIP

学兔兔 全焊接钢桁梁斜拉桥主梁整节段施工技术 陈理平 73 文章编号：1003—4722(2010)04—0073—04 全焊接钢桁梁斜拉桥主梁整节段施工技术 陈理平 (中铁大桥局股份有限公司上海分公司，上海 200071) 摘 要：上海闵浦二桥主桥为独塔双索面连续钢板桁组合梁斜拉桥，跨径组合为251．4 m(主 跨)+(147+38．25)m(锚跨)，其主梁为全焊接结构，主梁施工采用工厂整节段预制，现场整节段 安装的方法，节段预制在工厂先进行平面桁片拼装，再进行立体总拼，拼装时采用N+1匹配技术， 现场吊装支架段采用1 200 t浮吊安装，标准段采用260 t步履式桥面吊机安装，钢梁节段在工地采 用对接焊接施工。 、 关键词：斜拉桥；钢桁梁；组合梁；焊接；桥梁施工 中图分类号：U448．27；U445．4 文献标志码：A Construction Techniques for Integral Blocks of Main Girder of an All_-Welded Steel Truss Girder Cable--Stayed Bridge CHEN Li—ping (Shanghai Company，China Railway Major Bridge Engineering，Inc．，Shanghai 200071，China) Abstract：The main bridge of the Second Minpu Bridge in Shanghai is a continuous composite steel plate and truss girder cable—stayed bridge with a single pylon and double cable planes and with span arrangement 251．4 m (main span)4-(147+38．25)m (anchor spans)．The main girder of the bridge is an all—welded structure that was constructed by the method of manufacturing each integral truss block in shop and installing the block in field．At the time each block was manufac— tured in shop，the plane trusses were firstly assembled and then the space trusses were generally assembled，for which the N+1 matching technique was used．In field，the sections of the truss girder used as the lifting and installation supports were installed by the 1 200一t capacity floating crane，the standard sections of the girder were installed by the 260一t capacity walking type deck crane and al1 truss blocks were connected by but