A STUDY OF STRESSES AND DEFORMATIONS UNDER DYNAMIC AND STATIC LOAD SYSTEMS IN TRACK STRUCTURE AND SUPPORT

An investigation of the selection of ballast using standard and modified standard classification tests is reported. The results enable ballasts to be selected with better reliability in regard to their satisfactory performance in the railroad bed. Where necessary, the tests were performed on ten ballasts in order to see which, if any, correlated with their field performance. The field performance in terms of stability and in terms of breakdown of the ten ballasts was obtained from a CN field test. In addition, the behaviour of a layer of ballast was investigated under ideal loading conditions. Standard and repeated loading triaxial tests investigate the fundamental stress-strain characteristics of the ballast. These were supplemented by a model full-scale test. The results of this additional work will improve the specifications for the initial compaction of a layer of ballast and for the tie configuration to give the best subsequent performance under load. In the future it should lead to the development of a theoretically valid design method for the complete road bed.

  • Corporate Authors:

    Canadian Institute of Guided Ground Transport

    Queen's University
    Kingston, Ontario K7L 3N6,   Canada 
  • Authors:
    • Raymond, G P
    • Gaskin, P N
    • Van Dalen, K
    • Davies, J R
  • Publication Date: 1975-9

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 53 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00141130
  • Record Type: Publication
  • Source Agency: Canadian Institute of Guided Ground Transport
  • Report/Paper Numbers: No. 75-10
  • Files: TRIS
  • Created Date: Feb 1 1977 12:00AM