野三河大桥非对称坡拱拱肋钢管骨架吊装方案研究  

Study on Steel Tube Skeleton Hoisting and Erecting Scheme of Yesanhe Asymmetric Gradient Arch Bridge

作　　者：上官涛 彭学理 葛凯[2] 陈强 

机构地区：[1]中国铁路总公司工程管理中心,北京100844 [2]中国铁道科学研究院,北京100081 [3]蒙西华中铁路股份有限公司,北京100073

出　　处：《施工技术》2013年第17期85-88,共4页Construction Technology

基　　金：铁道部科技研究开发计划项目(2004G019-O)

摘　　要：野三河大桥为国内第一座非对称坡拱结构桥,钢管拱肋骨架成型的质量至关重要。根据吊装方案,将扣索作为结构整体模型的一部分,通过迭代计算给出了一组优化扣索索力,确保骨架的线形和应力状态较好地满足合龙要求;并通过倒拆计算得到骨架吊装过程中扣索的张拉控制力及扣点标高控制值,取得了良好的控制效果,保证了骨架成型质量,并避开了了繁琐的扣索索力调整工序,为大跨度铁路拱桥的骨架吊装控制提供了可靠、有效的方法。Yesanhe Bridge is the first gradient arch bridge in China, and construction quality of its＇ asymmetric gradient arch rib is vital in the whole process of bridge construction. In this paper, taking stayed-buckle cable as part of whole model, FEM is applied to simulate hoisting process of the steel- tubular skeleton, and optimized stayed-buckle cable forces are obtained after several iterating procedures. Before the closure of arch rib frame which is lifted by a set of stayed-buckle cable forces, the deformation and stress status of steel-tubular arch rib frame can meet the requirement of closure. From the demolishment computation of steel-tubular skeleton frame, tension control value of stayed-buckle cables and levels of steel arch rib frame, which are the key control index during the steel-tubular skeleton hoisting process, are acquired, and thus arch rib forming qualities are guaranteed without any tension adjustment of stayed-buckle cables. It proves that such control method of steel-tubal arch rib is efficient.

关 键 词：桥梁工程 拱桥 拱肋 钢管骨架 吊装控制 优化 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]