港珠澳大桥正交异性钢桥面板制作技术

发布时间：2018-02-25 20:28

本文关键词： 桥面板正交异性板 U形肋焊接制造焊接机器人船位焊接技术疲劳试验　出处：《桥梁建设》2015年05期 　论文类型：期刊论文

【摘要】：针对港珠澳大桥长寿命的设计要求,对桥面板U形肋加工技术及桥面板自动化焊接技术进行研究,分析如何通过提高U形肋与桥面板的焊接质量和稳定性来提高正交异性钢桥面板的抗疲劳性能。U形肋的加工工序为:钢板校平→预处理→钢板切割→边缘加工→钻孔→坡口加工→压型。U形肋的组装、定位焊在专用机床上完成,定位焊由焊接机器人完成,突破了制约U形肋焊接熔深难于达到设计要求80%的瓶颈及焊接质量不稳定的难题。采用船位焊接技术,保证了焊缝外观成型,使桥面板与U形肋间连接焊缝的焊趾过渡更加平顺,应力集中大大降低。对U形肋角焊缝进行疲劳试验,结果表明采用新工艺后U形肋焊缝的抗疲劳性能大幅提升。
[Abstract]:According to the long life design requirements of HongKong-Zhuhai-Macao Bridge, the processing technology of U-shaped rib and the automatic welding technology of deck slab are studied. This paper analyzes how to improve the fatigue resistance of orthotropic steel bridge panel by improving the welding quality and stability of U-shaped rib and bridge deck. The processing procedure of U-shaped rib is as follows: steel plate leveling. 鈫扨retreatment. 鈫扴teel plate cutting. 鈫扙dge machining. 鈫払orehole. 鈫扜roove processing. 鈫扵he assembly of the pressure shape. U rib, the position welding is completed on the special machine tool, the localization welding is completed by the welding robot. It breaks through the bottleneck which restricts the penetration depth of U-rib welding which is difficult to reach the design requirement of 80% and the difficult problem of unstable welding quality. The welding toe transition between bridge slab and U-shaped rib joint weld is more smooth and the stress concentration is greatly reduced. The fatigue test of U-ribbed fillet weld shows that the fatigue resistance of U-shaped ribbed weld is greatly improved after adopting the new technology.
【作者单位】：中铁山桥集团有限公司;
【分类号】：U443.31

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