AVOIDANCE OF EXPANSION JOINTS IN HIGH-SPEED CWR TRACK ON LONG BRIDGES

Due to temperature variations, considerable longitudinal rail forces and displacements may develop in continuous welded rail (CWR) track on long-span bridges or viaducts. Excessive relative displacements between sleepers and ballast bed may disturb the stable position of the track in the ballast which results in a lower frictional resistance. Generally, these problems are solved by installing rail expansion devices in the track. For high-speed track, however, this is not an attractive solution as these devices cause local disturbance of the vertical track stiffness and track geometry which would require intensive maintenance. Initiated by a railway bridge situation near Antoining, Belgium, Delft University of Technology carried out a theoretical study, sponsored by Belgian National Railways (SNCB), to assess the possibility of avoiding expansion joints on long bridges.

Language

  • English

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Filing Info

  • Accession Number: 00715150
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Jan 3 1996 12:00AM