Results of the fatigue analysis of a series of traditional-type structures with different ballast thicknesses, whch reveal unsatisfactory fatigue behaviour of the ballast, leading to a rapid lowering of the track level. Its behaviour is quite different when there is a sub-ballast as the ballast works exclusively on the basis of compression without fatigue phenomena. The application of Miner's Law means that the theoretical use of the sub-ballast can be calculated at about a century. Another remarkable advantage of a sub-ballast lkayer is that it evens out the subgrade. The methodology adopted can easily be applied to different types of traffic and to different structure characteristics.

  • Corporate Authors:

    Collegio Ingegneri Ferroviari Italiani

    Via Giolitti 34
    Rome,   Italy 
  • Authors:
    • Orlandi, D
  • Publication Date: 1985-8


  • Italian

Media Info

  • Features: Photos; References; Tables;
  • Pagination: p. 447-453
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00456217
  • Record Type: Publication
  • Source Agency: International Union of Railways
  • Files: TRIS
  • Created Date: Jul 31 1986 12:00AM