Research On Key Technologies Of Seamless Turnout On Bridge

With the development of rail transport, high-speed railway passenger dedicated line in China is being built widely. The location of Passenger Dedicated Line stations are restricted by the terrain conditions. Some stations on the throat area are located on the bridge, and that is a seamless turnout on bridge. It's the same to the station of city elevated railway. The technique of seamless turnout on bridge contains the technical characteristics and the difficulties of Continuous Welded Rail (CWR) on the bridge, seamless turnout and long-span bridges, which leads to a series of new technical challenges. The technique is a new hot topic in the field of bridge engineering research. The relation between turnout and bridge, the transmission mechanism are key technique in the design of seamless turnout on bridge.In this thesis, the development and current situation in seamless turnout on bridge, CWR on bridge, seamless turnout bridge on the ballastless track at home and abroad are summarized. On the basis of application and research about seamless turnout on bridge, combining with the computing theory about bridge of the Passenger Dedicated Line, taking BaijiaLang Major II on Wuhan-Guangzhou Passenger Dedicated Line as an example, using of finite element program ANSYS combined with of ANSYS parametric design language (APDL), establishing a "turnout - bridge - piers" integral consideration model, the mechanical properties of seamless turnout on bridge under temperature load and vertical vehicles load are calculated and analyzed . At last, some useful conclusions are drawn, and guidance for the design of seamless turnout on bridge is provided.Using of the space finite element calculation model, the space mechanical properties according to the style of bridge, section bending stiffness, the form of horizontal support layout are analyzed and therefore providing some useful suggestions for the structure design of seamless turnout on bridge.