Skip to main content
placeholder image

From theory to practice in rail geotechnology

Conference Paper


Download full-text (Open Access)

Abstract


  • In recent times the increase in axle loads and train speeds have posed serious

    geotechnical issues with ballasted railway tracks, both in Australia and the world. The large

    deformations and degradation of ballast under cyclic and impact loads, and the low bearing

    capacity of compacted ballast and impaired drainage often exacerbate track maintenance. In

    recent times in Australia, geosynthetics have been trialed in ballasted tracks constructed on

    soft and saturated formations to help improve stability and longevity. Comprehensive field

    studies on instrumented tracks at Bulli (near Wollongong) and Singleton (near Newcastle)

    supported by RailCorp and ARTC, were carried out to measure the in-situ stresses and

    deformation of ballast embankments. The findings of the Bulli Study indicated that recycled

    ballast could be effectively reused in track construction if it was re-graded and reinforced with

    geocomposites. The results of the Singleton Study showed that geogrids with an optimum

    aperture size can significantly reduce deformations of ballast layer by proving improved

    interlock with the particles. It was also found that the strains accumulated in geogrids were

    influenced by deformation of the subgrade, whereas the induced transient strains were mainly

    affected by the stiffuess of the geogrids. A better understanding of such performance would

    allow for a safer and more effective design and analysis of ballasted rail tracks with

    geosynthetic reinforcement and resilient shock mats.

Publication Date


  • 2013

Citation


  • Indraratna, B., Nimbalkar, S., Tennakoon, N. & Sun, Q. D. (2013). From theory to practice in rail geotechnology. Ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields (pp. 1-20). Norway: Akademika Publishing.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2143&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1134

Start Page


  • 1

End Page


  • 20

Place Of Publication


  • Norway

Abstract


  • In recent times the increase in axle loads and train speeds have posed serious

    geotechnical issues with ballasted railway tracks, both in Australia and the world. The large

    deformations and degradation of ballast under cyclic and impact loads, and the low bearing

    capacity of compacted ballast and impaired drainage often exacerbate track maintenance. In

    recent times in Australia, geosynthetics have been trialed in ballasted tracks constructed on

    soft and saturated formations to help improve stability and longevity. Comprehensive field

    studies on instrumented tracks at Bulli (near Wollongong) and Singleton (near Newcastle)

    supported by RailCorp and ARTC, were carried out to measure the in-situ stresses and

    deformation of ballast embankments. The findings of the Bulli Study indicated that recycled

    ballast could be effectively reused in track construction if it was re-graded and reinforced with

    geocomposites. The results of the Singleton Study showed that geogrids with an optimum

    aperture size can significantly reduce deformations of ballast layer by proving improved

    interlock with the particles. It was also found that the strains accumulated in geogrids were

    influenced by deformation of the subgrade, whereas the induced transient strains were mainly

    affected by the stiffuess of the geogrids. A better understanding of such performance would

    allow for a safer and more effective design and analysis of ballasted rail tracks with

    geosynthetic reinforcement and resilient shock mats.

Publication Date


  • 2013

Citation


  • Indraratna, B., Nimbalkar, S., Tennakoon, N. & Sun, Q. D. (2013). From theory to practice in rail geotechnology. Ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields (pp. 1-20). Norway: Akademika Publishing.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2143&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1134

Start Page


  • 1

End Page


  • 20

Place Of Publication


  • Norway