名山长江大桥主桥南边跨钢箱梁吊装施工方案比选与实施

发布时间：2018-03-16 04:12

本文选题：斜拉桥　切入点：钢箱梁　出处：《世界桥梁》2017年03期 　论文类型：期刊论文

【摘要】：名山长江大桥位于三峡库区内,其主桥为主跨680m的钢箱梁斜拉桥。受地形条件及水位变化的影响,低水位时,南边跨0号、1号墩之间的山侧陡坡区及1号、2号墩之间的水位涨落区钢箱梁无法按照常规的"桥面吊机+运梁船"方式进行梁段吊装施工,因此提出方案一(运梁滑道系统+变幅式桥面吊机+存梁支架)和方案二(运梁支架系统+变幅式桥面吊机+存梁支架)2种施工方案。通过安全风险、经济效益等方面的比选后,最终决定采用方案一,即首先利用浮吊将运梁船上的钢箱梁逐个吊放在滑道上的运梁小车上,其次通过牵引系统将运梁小车移到吊装位置正下方,最后通过变幅式桥面吊机将钢箱梁逐个起吊、变幅,存放至0号、1号墩之间的存梁支架上。
[Abstract]:The Mingshan Yangtze River Bridge is located in the three Gorges Reservoir area. Its main bridge is a steel box girder cable-stayed bridge with a main span of 680m. The steel box girder in the steep slope area of the mountain side between Pier 0 and Pier 1 and between Pier 1 and Pier 2 in the south cannot be hoisted in accordance with the conventional mode of "bridge deck crane carrying beam ship". Therefore, this paper puts forward two construction schemes: one (variable amplitude type bridge deck crane storage support) and two schemes (beam carrying support system, variable amplitude type bridge deck crane storage support) and two construction schemes. Safety risk, safety risk, safety risk, safety risk, safety risk, safety risk, safety risk, safety risk, safety risk, safety risk and safety risk are proposed. After the comparison of economic benefits and other aspects, it was finally decided to adopt the scheme one by one, that is, first, the steel box girder on the beam carrying ship was suspended one by one on the slide track by floating crane, and then, by means of the traction system, the beam carrier was moved directly below the hoisting position. Finally, the steel box girder is hoisted one by one by the variable amplitude bridge deck crane, and stored on the beam storage support between Pier 0 and Pier No. 1.
【作者单位】：中交路桥华东工程有限公司;
【分类号】：U445.4;U448.27

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