Research on Design of CWR on High Pier and Long Span Continuous Rigid Frame Bridge on High-speed Railway

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 mechanism 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 regular resistance fastening and part regular resistance-part slightdrag fastening is performed,such indexes as track expansion force,bending force and track stability and intensity are compared,finally,the rational layout form of part regular resistance- part slightdrag fastening is obtained.