铜陵公铁两用长江大桥钢桁梁全焊桁片制造技术

发布时间：2018-03-20 01:35

本文选题：铁路公路两用桥　切入点：斜拉桥　出处：《桥梁建设》2014年01期 　论文类型：期刊论文

【摘要】：铜陵公铁两用长江大桥主桥为(90+240+630+240+90)m五跨连续钢桁梁斜拉桥。主梁采用3片主桁,N形桁架,3片主桁均为双节间全焊桁片结构,双节间全焊桁片长30m、宽2.85m、高18m,单榀桁片最重360t,每榀桁片由上、下弦杆及腹杆全焊接而成。主桥钢桁梁采用双节间全焊桁片及上、下桥面板分块整体制造技术,为了保证桁片制造精度,全焊桁片采用"2+1"匹配制造技术,将桁片上(下)弦杆、竖腹杆及斜腹杆单件制造成型后再进行桁片总拼,3个全焊桁片在胎架上制造完后,其中前两个全焊桁片出胎,最后一个桁片移至前端作为母梁,匹配拼装后续桁片,直至全部匹配完成。目前,该桥钢桁梁已安装完成,制造精度满足规范要求。
[Abstract]:The main bridge of Tongling Yangtze River Bridge is 90 240 630 240 90 m continuous steel truss girder cable-stayed bridge. The main girder adopts 3 main truss N-shaped trusses and 3 main trusses are all two-node full-welded truss structures. The steel truss of the main bridge is made up of the upper truss, the lower chord and the web bar. The steel truss beam of the main bridge adopts the technology of making the steel truss beam with double intersections, full welding truss pieces, upper and lower deck plates, and the whole manufacture technology of the steel truss plate of the main bridge by using the full welding truss plate length, the width of 2.85 mm. the height of the truss plate, the maximum weight of the truss plate, and the weight of each truss piece. In order to ensure the manufacturing accuracy of the truss plate, the "21" matching manufacturing technology is adopted for the full welded truss sheet. The top (bottom) chord of the truss plate, the vertical web rod and the sloping web rod are made into a single piece and then the total truss pieces are assembled. After the three full truss pieces are manufactured on the tire frame, The first two full welded truss plates are out of tire, the last one is moved to the front end as the parent beam, and the subsequent truss plates are matched and assembled until all the matching is completed. At present, the steel truss beam of the bridge has been installed and the manufacturing accuracy meets the requirements of the specification.
【作者单位】：中铁科工集团有限公司;
【分类号】：U445.583

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