摘要
随着我国高速铁路的不断建设,高速铁路高墩长联大跨桥梁日益增多。鉴于该类桥梁上无缝线路设计经验较少,桥梁与无缝线路相互作用机理不易准确分析,无缝线路纵向附加力及墩台承受的纵向附加力分配不明确,导致了该类桥上无缝线路设计困难。文中选取了典型高墩长联大跨桥梁——贵广铁路幸福源双线特大桥作为研究对象,对该桥无缝线路布置进行了不设伸缩调节器铺设常阻力构件和部分常阻力部分小阻力扣件的计算分析研究。主要比较了轨道伸缩力,挠曲力以及轨道的稳定与强度等指标,通过研究得到了该桥无缝线路在不设伸缩调节器时,部分采用常阻力部分采用小阻力扣件的合理布置形式。
With the continuous development of high-speed railway in China, the increasing number of high pier and long span multi-continuous beams bridges contrasts greatly with the lack of experience of CWR design, the interaction mecha- nism between bridge and CWR can not be exactly analyzed, Longitudinal additional forces of CWR and that supported by abutment are not distributed definitely, leads to difficulty in the design of CWR track on such bridges. This paper selects a typical high pier and long span bridge-- Xingfuyuan double-line super large bridge on Guiyang-Guangzhou railway as the research object, for CWR track without expansion joint on the bridge, calculation analysis research on laying reg- ular resistance fastening and part regular resistance-part slightdrag fastening is performed, such indexes as track expan- sion force, bending force and track stability and intensity are compared, finally rational layout form of part regularresistance -part slightdrag fastening is obtained.
出处
《高速铁路技术》
2013年第5期42-45,共4页
High Speed Railway Technology
基金
铁道部科技研究开发计划课题资助(2010G018-A-4)
关键词
高速铁路
长联大跨桥
桥上无缝线路
设计研究
high-speed railway
long span multi-continuous beam bridge
CWR track on bridge
research and design
