The rig incorporates one hydraulic jack capable of imposing repeated loads in one direction only, the jack being connected to a pulsator. Because the jack must always exert some load, it has been necessary to resort to pre-loaded springs to provide an upward force counteracting the minimum exerted by the jack; these springs also provide the upward force equivalent to that normally due to the precession wave between the applications of the downward loads. The arrangement is illustrated. The pulsator gives 250 loadings per minute. Effects of corrosion are not simulated. The test-rig has been working for only a few months but it has indicated weaknesses in rail-sleeper assemblies very like those occasionally found in service, even though, sometimes, the service conditions have not, nominally, been nearly as severe as those simulated in the tests.

  • Corporate Authors:

    Temple Press Limited

    161-166 Fleet Street
    Longon EC4,   England 
  • Authors:
    • Loach, J C
  • Publication Date: 1965-4-2

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 274
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00037859
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM