铜陵公铁两用长江大桥桁片式钢桁梁立体试拼装工艺

发布时间：2019-08-13 07:36

【摘要】：铜陵公铁两用长江大桥为五跨连续钢桁梁三索面斜拉桥,钢桁梁采用板桁结合形式,由3片主桁、上层正交异性公路板式桥面、下层正交异性铁路钢箱桥面及横联构成。钢桁梁采用整体焊接式桁片结构,每2个节间的主桁上、下弦杆,斜杆,竖杆通过整体节点焊接成桁片上桥安装。为验证制造工艺和精度并指导实桥施工,选取3.5个连续节间钢桁梁在工厂内一次完成立体试拼装。由于主桁桁片采用水平拼装制作工艺,采用800t龙门吊机2×200t吊钩提升加横移对桁片进行90°转体翻身后试拼装。试拼装过程中设置了抗推拉刚性斜撑增强桁片与铁路桥面的稳定性;在斜杆件加垫片,通过调整间隙控制桥梁预拱度。试拼装过程中设置了测量控制网,检测结果满足设计和验收标准,达到了立体试拼装目的。
[Abstract]:Tongling Public Railway dual-purpose Yangtze River Bridge is a five-span continuous steel truss three-cable-stayed bridge. The steel truss is composed of three main trusses, the upper orthotropic highway slab bridge deck, the lower orthotropic railway steel box bridge deck and the transverse connection. The steel truss beam adopts the integral welded truss structure, and the upper, lower chord, inclined bar and vertical bar of the main truss of every two joints are welded into the truss bridge through the whole joint. In order to verify the manufacturing process and accuracy and guide the construction of the real bridge, 3.5 continuous Internode steel trusses were selected to complete the three-dimensional trial assembly in the factory at one time. Because the main truss adopts horizontal assembly technology, 800t gantry crane 2 脳 200t hooks are used to lift and move the truss plate for 90 掳turning and assembling. In the process of trial assembly, anti-push-pull rigid oblique brace is set up to enhance the stability of truss and railway bridge deck, and gasket is added to the inclined bar to control the pre-arch of the bridge by adjusting the clearance. The measurement control network is set up in the process of trial assembly, and the test results meet the design and acceptance standards, and achieve the purpose of stereoscopic assembly.
【作者单位】：中铁山桥集团有限公司;中铁大桥局集团有限公司;
【分类号】：U448.121;U445

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