托巴大桥双向移动缆索吊机的设计与应用

发布时间：2018-05-12 06:15

本文选题：拱桥 + 钢筋混凝土结构　；参考：《桥梁建设》2017年02期

【摘要】：澜沧江托巴大桥为主跨100m的上承式钢筋混凝土预制箱拱桥,全桥共30个拱箱,采用斜拉扣挂缆索吊装法施工,最大吊重74t。由于施工现场的限制以及传统缆索吊机的不足,为实现缆索吊机可负载条件下往复式实时横移,提出采用双向移动缆索吊机进行吊装。双向移动缆索吊机主要由主索(跨度281m,设计垂度17.5m)、横移系统(由台车和油缸步进液压千斤顶组成)、地锚系统(由地锚梁及预应力锚索构成)、起重及牵引系统、机电设备等构成。按照实际工况设计双向移动缆索吊机的各组件,在双向移动缆索吊机安装后进行测试试验,通过试验后,将该吊机应用于该桥的吊装施工。实践证明,双向移动缆索吊机可以承担吊装任务,实现全桥吊装范围无死角覆盖,可节约工期。
[Abstract]:The Toba Bridge of Lancang River is an overbearing reinforced concrete prefabricated box arch bridge with a main span of 100m. There are 30 arch boxes in the whole bridge. The cable-stayed cable hoisting method is used to construct the bridge with a maximum lifting weight of 74 t. Because of the limitation of the construction site and the deficiency of the traditional cable crane, in order to realize the reciprocating real-time transverse movement of the cable crane under the loadable condition, a bidirectional moving cable crane is proposed for hoisting. The bidirectional moveable cable crane is mainly composed of main cables (span 281 m, design sag 17. 5 m / m), transverse displacement system (composed of hydraulic Jack with walking hydraulic jacks and oil cylinders), ground anchor system (composed of ground anchor beam and prestressed anchor cable), lifting and traction system, electromechanical equipment and so on. According to the actual working conditions, the components of the bidirectional moving-cable crane are designed and tested after installation of the bidirectional moving-cable crane. After the test, the crane is applied to the hoisting construction of the bridge. It is proved by practice that the bidirectional moving-cable crane can take the lifting task and realize that the whole bridge hoisting range has no dead angle coverage and can save the construction period.
【作者单位】：昆明理工大学建筑工程学院;云南公路开发投资有限公司;
【基金】：国家自然科学基金项目(50878152)~~
【分类号】：U445.32

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