THE BEHAVIOUR OF BALLAST UNDER LOADING

Studies have been carried out at the test rig of the department for construction of land traffic ways at Munich Technical University on behalf of the DB with the aim of determining the influence of axle forces on the settling of the ballast bed. Ballast and formation settlement and the influence of ballast wetting were investigated for three different simulated axle forces. The high initial rate of settlement, which also occurs in the track, permits the conclusion that the ballast is not adequately compacted during the usual track maintenance work. The stabilizer, which is already in use on various railways, can be a step toward improving track-bed stability. Good results have also been obtained with the formerly used sleeper-crib compactors. It is specially important that the behaviour of ballast and formation is as uniform as possible. On new routes, therefore, the ballast should be placed as homogeneous as possible with a finisher so as to counter as far as possible any segregation during off-loading which could result in uneven settlement. Also the effects of the rail profile and the sleepers on the ballast loading have to be considered. The influence of grain-size composition and aggregate strength on settling behaviour is at present being investigated.

  • Corporate Authors:

    Hestra Verlag

    Holzhofallee 33, Postfach 4244
    6100 Darmstadt 1,   Germany 
  • Authors:
    • EISENMANN, J
    • KAESS, G
  • Publication Date: 1980-3

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00316564
  • Record Type: Publication
  • Source Agency: British Railways
  • Files: TRIS
  • Created Date: Sep 16 1980 12:00AM