铜陵公铁两用长江大桥主桥钢梁架设方案研究

发布时间：2018-04-10 15:32

本文选题：公路铁路两用桥 + 斜拉桥　；参考：《桥梁建设》2014年05期

【摘要】：铜陵公铁两用长江大桥主桥为630m五跨连续钢桁梁斜拉桥,采用三主桁三索面结构型式。3片主桁均由全焊桁片拼装而成。通过对备选方案的研究和比选,铜陵岸钢梁架设采用"边跨全顶推法架设+中跨悬臂法架设"方案,无为岸钢梁架设采用"边跨部分拖拉法架设+中跨悬臂法架设"方案,中跨合龙采用"桁片整体合龙"方案。在4号桥塔墩设置顶推平台和顶推装置,将铜陵岸边跨和次边跨钢梁分段安装、分次顶推至全部就位,然后将中跨钢梁悬臂架设至合龙口;在2号墩前方设置安装平台、1号墩墩顶布置拖拉装置,将无为岸边跨和部分次边跨钢梁分段安装、分次拖拉至全部就位,然后将3号墩前后两侧钢梁双悬臂架设至边跨合龙,再将剩余中跨钢梁单悬臂架设至跨中合龙口;最后吊装合龙段桁片进行中跨合龙。
[Abstract]:The main bridge of Tongling Yangtze River Bridge is 630m continuous steel truss girder cable-stayed bridge with three main trusses and three cable planes.Based on the research and comparison of the alternative schemes, the "middle span cantilever erection" scheme is adopted for the Tongling shore steel beam erection, and the "side span partial towing method for the mid-span cantilever erection" scheme is adopted for the shore steel beam erection.Middle-span closure of the use of "truss piece integral closure" scheme.At the pier of No. 4 bridge tower, a pushing platform and a pushing device are set up to install the steel beam of Tongling shore span and the second side span in sections, pushing the steel beam into full position step by step, and then erecting the cantilever of the mid-span steel beam to the closing Longkou.Installation platform is installed in front of Pier 2, and the top of Pier 1 is placed with towing device. The steel beam with no shore span and partial secondary side span will be installed in sections, dragging to full position in stages, and then double cantilever of steel beam on both sides of Pier 3 will be set up to close the side span, and then the steel beam on both sides of Pier 3 will be set up to close the side span.Then the single cantilever of the remaining middle span steel beam is set up to the middle span closing port, and finally the hoisting closure section truss plate is mounted for the middle span closure.
【作者单位】：中铁大桥局集团有限公司;
【分类号】：U448.27;U445.46

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