沪通长江大桥主航道桥钢桁梁制孔精度控制

发布时间：2018-05-15 12:48

本文选题：钢桁梁 + 栓焊结构　；参考：《世界桥梁》2017年01期

【摘要】：沪通长江大桥主航道桥为主跨1 092m的双塔三索面斜拉桥,采用3片"N"形主桁结构,钢桁梁采用整节段架设方案,节段内焊接、节段间栓接的组合连接方式。为确保钢桁梁制孔精度并消除后续焊接收缩影响,通过对杆件状态钻孔、桁片或节段状态钻孔2种方案比选,确定了在杆件状态钻孔并配合节段连续匹配制造的总体方案。钻孔时,普通箱形、工形杆件采用单龙门数控钻床钻孔;整体节点杆件采用双龙门三维数控钻床钻孔,对于无法使用双龙门三维数控钻床两端同时钻孔的上弦杆采用双龙门三维数控钻床配合U形样板钻孔。实践表明,该控制技术有效保证了制孔精度。
[Abstract]:The main waterway bridge of Hutong Yangtze River Bridge is a cable-stayed bridge with two towers and three cable planes with a main span of 109.2 m. Three "N" shape main truss structures are adopted. The steel truss beam adopts the whole section erection scheme, the welding in the segment, and the combination connection between the segments. In order to ensure the hole-making accuracy of steel truss beam and eliminate the influence of subsequent welding shrinkage, the overall scheme of continuous matching manufacturing of member state drilling and matching segment is determined by comparing and selecting two kinds of schemes, namely, the state of member drilling, the truss piece or segment state drilling. When drilling, the common box-shaped, the workpiece uses the single gantry NC drilling machine to drill, the integral node member uses the double gantry three-dimensional numerical control drilling machine to drill hole, the whole node member uses the double gantry three-dimensional numerical control drilling machine to drill hole, For the upper chord which can not be drilled simultaneously at both ends of the double gantry 3D NC drilling machine, the double gantry 3D NC drilling machine is used to drill with U shape template. Practice shows that the control technology can effectively ensure the accuracy of hole making.
【作者单位】：江苏中铁山桥集团有限公司;中铁大桥局集团有限公司;
【分类号】：U445.4

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