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TRACK STRUCTURE FOR HIGH SPEED RUNNING

Numerous experiments on gradual growth of track irregularities show that the vibration with very large acceleration of the track, which occurs by the shock of running wheels, brings an extreme reduction of load bearing power of the ballast, and that the ballast surface suffers settlement under train loads. The amount of ballast settlement is proportional to the load, the number of repetition and the acceleration of ballast vibration, and the acceleration increases proportionally to the train speed. By using 70 kg rails, with sleepers wider by 20% than the present ones and rubber pads having one half of the present coefficient of spring; the track destruction caused by the same train load becomes 35% of that of the present standard track. By decreasing spring coefficient of one. The method of fastening a rail elastically to a vibration becomes as small as 40% of that of the present one. The method of fastening a real elastically to a sleeper using rubber pads and metallic springs has already been standard for a concrete sleeper, but as the action of load at the portion of fastening was not hitherto known well, the design should be regarded as rather empirical.

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  • Corporate Authors:

    JAPANESE NATIONAL RAILWAYS

    TOKYO,   Japan 
  • Authors:
    • Hoshino, Y
  • Publication Date: 1960-4

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Filing Info

  • Accession Number: 00040559
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM