THE BALLAST COEFFICIENT AND ITS APPLICATION TO THE STUDY OF RAILWAY TRACK MECHANICS

EL COEFFICIENTE DE BALASTO Y SU APPLICACION AL ESTUDIO DE LA MECANICA DE UNA VIA FERREA

The studies carried out to date on the dependent relationship existing between the ballast coefficient, or the track modulus and the parameters on which they depend are critically analysed. Referring to the present state of knowledge, the author makes a historical analysis divided into two periods (1867-1940 and 1940-1975), in which he covers the theories of the various researchers who have worked on the subject. In more detail he examines critically the ballast coefficient, dealing with its origin and meaning, the first experiments, the formula of Wasiutynski, the observations of Bauchal and Eisenmann's results, relating them to the Winkler School. Later he deals with the track modulus, its origin and meaning; the first experiments, Wasiutynski's results, the studies of M.I.V. (1967) and Timoskenko's values and the relationship between the track modulus and the stiffness coefficient of a sleeper. Finally, critical comments are made on the various theories and methodologies previously explained and an analysis is set forth on the advantages and limitations which both the method of the ballast coefficient and that of the stiffness coefficient present. It is concluded, in synthesis, that the only way of accounting for the specifications of the various elements (track-survey, ballast-platform) is by applying multi-layer elastic theories.

  • Corporate Authors:

    Asociacion de Investigacion del Transporte

    Alberto Alcocer 38
    Madrid,   Spain 
  • Authors:
    • Lopez, A
  • Publication Date: 1976-10

Language

  • Spanish

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 53-68
  • Serial:
    • AIT-Revista
    • Issue Number: 12
    • Publisher: Asociacion de Investigacion del Transporte

Subject/Index Terms

Filing Info

  • Accession Number: 00176916
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Jun 14 1978 12:00AM