厦深铁路榕江特大桥主桥连续钢桁梁柔性拱施工关键技术

发布时间：2018-06-09 23:16

本文选题：铁路桥 + 连续钢桁梁　；参考：《世界桥梁》2014年04期

【摘要】：厦深铁路榕江特大桥主桥为(110+220+220+110)m连续钢桁梁柔性拱桥。主桥钢梁由连续钢桁梁、V形加劲弦钢梁和柔性拱钢梁三部分组成,连续钢桁梁为N形结构,其正交异性整体钢桥面板顶面与下弦杆顶面平齐;柔性拱钢梁由箱形拱肋、吊杆和平联组成,拱肋按二次抛物线布置。针对主桥钢梁结构复杂、连续钢桁梁与柔性拱合龙难度大等技术难题,制定了将连续钢桁梁与柔性拱分层架设、分次合龙的架设方案,先施工连续钢桁梁,再施工柔性拱钢梁。连续钢桁梁用4台全回转架梁起重机,分4个架梁作业面进行架设,分别在两主跨的跨中进行合龙;2个柔性拱钢梁用2台全回转架梁起重机分别从2个柔性拱的外则向主桥中间架设,在主桥中墩处进行对接合龙。
[Abstract]:The main bridge of Rongjiang Super Bridge on Xiamen and Shenzhen Railway is a flexible arch bridge with continuous steel truss beam of 110 220 220 110m. The steel beam of the main bridge is composed of continuous steel truss beam with V-shaped stiffened string beam and flexible arch steel beam. The continuous steel truss beam is N-shaped structure, and the top face of orthotropic integral steel bridge is flat with the top surface of the lower chord, and the flexible arch steel beam is box-shaped arch rib. The arch rib is arranged according to the second parabola. In view of the technical problems such as complex structure of steel beam of main bridge and difficulty of continuous steel truss beam and flexible arch closing, the erection scheme of continuous steel truss beam and flexible arch is established, which is divided into several times, and the continuous steel truss beam is constructed first, and then the flexible arch beam is constructed. The continuous steel truss is set up by four fully rotating girder cranes, which are divided into 4 working surfaces. The two flexible arch steel girder cranes are installed from the outside of the two flexible arch to the middle of the main bridge respectively, and the docking closure is carried out at the middle pier of the main bridge.
【作者单位】：中铁科工集团有限公司;
【分类号】：U448.22;U445.4

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