Ballast formation-track interaction mechanism based on large-scale laboratory testing

The major part of rail track maintenance cost is associated with ballast related problems and subgrade failure. The maintenance cost of substructure of ballasted railway tracks can be significantly reduced if a better understanding of the physical and mechanical properties of the substructure, in particular the ballast layer is obtained. This study addresses some promising findings of the dynamic behaviour of ballasted tracks, based on large-scale laboratory testing. The geotechnical characteristics of ballast, under cyclic loading and the role of geosynthetics in reduction of ballast particle breakage and track settlement are presented. Furthermore, based on a large-scale consolidometer rig, the effect of prefabricated vertical drains to optimise primary consolidation in soft formation soils is investigated. The main factors affecting the efficiency of prefabricated vertical drains including smear effects when employed in rail tracks with soft formation are also discussed.

Media Info

  • Pagination: 12p.
  • Monograph Title: New horizons for rail: CORE 2004: conference on railway engineering, June 20-23 2004, Darwin, Northern Territory, Australia

Subject/Index Terms

Filing Info

  • Accession Number: 01517216
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Mar 4 2014 8:13PM