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Monitoring of ballasted rail track with geosynthetic reinforcement

Conference Paper


Abstract


  • Large repetitive stresses induced from heavy train traffic can cause significant degradation of ballasted rail

    tracks, leading to poor track geometry and stability. This, in turn, results in decreased track performance and

    increased maintenance costs. Inclusions of geosynthetics in the track substructure can decrease the impact

    of these adverse effects. Thus, understanding the effects of geosynthetic reinforcement becomes necessary

    for improved design procedures and construction practices for ballasted rail tracks. However, the complex

    nature of the stress-strain response of composite track system is often difficult to assess using only

    laboratory tests on reduced-scale models. It is imperative to also understand this behaviour through in-situ

    monitoring of rail tracks. A series of full-scale field experiments was undertaken on track sections near

    Singleton, New South Wales to investigate the effects of geosynthetic reinforcement on the performance of

    the track. These experimental track sections were built on subgrade soils with varying stiffness, and various

    types of geosynthetics were installed at the ballast-subballast interface. Transient and accumulated

    deformations of the track substructure as well as variation of traffic-induced stresses in the track were

    routinely monitored. It was found that geogrids can decrease vertical strains of the ballast with obvious

    benefits of reduced track maintenance costs. It was also found that a few selected types of geogrids can be

    effectively used for soft subgrade soils.

Authors


  •   Anantanasakul, Pongpipat (external author)
  •   Indraratna, Buddhima N.
  •   Nimbalkar, Sanjay S. (external author)
  •   Neville, Tim (external author)

Publication Date


  • 2012

Citation


  • Anantanasakul, P., Indraratna, B., Nimbalkar, S. & Neville, T. (2012). Monitoring of ballasted rail track with geosynthetic reinforcement. In M. Dhanasekar, T. Constable & D. Schonfeld (Eds.), Conference on Railway Engineering (CORE) (pp. 367-374). Australia: The Railway Technical Society of Australiasia (RTSA).

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4998

Start Page


  • 367

End Page


  • 374

Place Of Publication


  • Australia

Abstract


  • Large repetitive stresses induced from heavy train traffic can cause significant degradation of ballasted rail

    tracks, leading to poor track geometry and stability. This, in turn, results in decreased track performance and

    increased maintenance costs. Inclusions of geosynthetics in the track substructure can decrease the impact

    of these adverse effects. Thus, understanding the effects of geosynthetic reinforcement becomes necessary

    for improved design procedures and construction practices for ballasted rail tracks. However, the complex

    nature of the stress-strain response of composite track system is often difficult to assess using only

    laboratory tests on reduced-scale models. It is imperative to also understand this behaviour through in-situ

    monitoring of rail tracks. A series of full-scale field experiments was undertaken on track sections near

    Singleton, New South Wales to investigate the effects of geosynthetic reinforcement on the performance of

    the track. These experimental track sections were built on subgrade soils with varying stiffness, and various

    types of geosynthetics were installed at the ballast-subballast interface. Transient and accumulated

    deformations of the track substructure as well as variation of traffic-induced stresses in the track were

    routinely monitored. It was found that geogrids can decrease vertical strains of the ballast with obvious

    benefits of reduced track maintenance costs. It was also found that a few selected types of geogrids can be

    effectively used for soft subgrade soils.

Authors


  •   Anantanasakul, Pongpipat (external author)
  •   Indraratna, Buddhima N.
  •   Nimbalkar, Sanjay S. (external author)
  •   Neville, Tim (external author)

Publication Date


  • 2012

Citation


  • Anantanasakul, P., Indraratna, B., Nimbalkar, S. & Neville, T. (2012). Monitoring of ballasted rail track with geosynthetic reinforcement. In M. Dhanasekar, T. Constable & D. Schonfeld (Eds.), Conference on Railway Engineering (CORE) (pp. 367-374). Australia: The Railway Technical Society of Australiasia (RTSA).

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4998

Start Page


  • 367

End Page


  • 374

Place Of Publication


  • Australia