An Australian update of geosynthetic solutions to prevent mud pumping and prolong maintenance cycles

Geosynthetics have been used in railway trackbed for about forty years. When they were first introduced there were many site trials, but few were documented and there was a lack of understanding of the way that they performed. Those trials that were reported were often hailed as a complete success, based on the evidence of early performance of the track. Some claims were subsequently shown to be unfounded, because the failure of a geosynthetic treatment can take many years to become evident. As a result of failure of early trials much research was undertaken to understand the fundamental behaviour of trackbed layers and how geosynthetic trackbed treatments could improve the performance of granular layers, or even replace them completely. Geosynthetics fall broadly into two categories: (a) filtration/separation over fine grained soils to prevent mud pumping and (b) reinforcement to improve track performance over soft subgrades. This paper describes how the understanding of fundamental behavior of traditional trackbed layers has led to the products that are available today. Case histories are described which show how customized solutions have been developed to address particular problems encountered in Australia.

Media Info

  • Pagination: 9p. ; PDF
  • Monograph Title: Maintaining the momentum: CORE 2016: conference on railway excellence, 16-18 May 2016, Melbourne, Victoria, Australia

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Filing Info

  • Accession Number: 01636856
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: May 30 2017 3:29PM