STUDY OF THE VARIOUS PROTECTIVE LAYERS OF THE TRACK FORMATION FOR BALLAST TRACK

UNTERSUCHUNG VERSCHIEDENER PLANUMSCHUTZSCHICHTEN FUER DEN SCHOTTEROBERBAU

The authors apply several sub-soil deformation modules to calculate stress for the following types of ballast track: without protective layer; with a 30 cm gravel layer; with a 20 cm or 25 cm cemented protective layer. Proposals are made for applications of the various types of protective layer. A cemented protective layer (with an elasticity module of 60,000 kp/sq cm) on ground of average hardness can account for a characteristic ballast coefficient of up to 30 kp/cu cm and a ballast pressure of 3.2 kp/sq cm which can be considered a maximum limit. Therefore, it is advisable to use cemented layers only when the elasticity module of the track formation is less than 500 kp/sq cm under 20 t axle loads. However, above 150 kp/sq cm, the ground must be stabilized and deep draining is necessary.

  • Corporate Authors:

    Hestra Verlag

    Holzhofallee 33, Postfach 4244
    6100 Darmstadt 1,   Germany 
  • Authors:
    • EISENMANN, J
    • SCHNEIDER, E
  • Publication Date: 1975-4

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00129414
  • Record Type: Publication
  • Source Agency: International Union of Railways
  • Files: TRIS
  • Created Date: Feb 19 1976 12:00AM