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Application of geoinclusions for sustainable rail infrastructure under increased axle loads and higher speeds

Journal Article


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Abstract


  • Given the ongoing demand for faster trains for carrying heavier loads, conventional ballasted railroads require considerable

    upgrading in order to cope with the increasing traffic-induced stresses. During train operations, ballast deteriorates due

    to progressive breakage and fouling caused by the infiltration of fine particles from the surface or mud-pumping from the

    underneath layers (e.g. sub-ballast, sub-grade), which decreases the load bearing capacity, impedes drainage and increases

    the deformation of ballasted tracks. Suitable ground improvement techniques involving geosynthetics and resilient rubber

    sheets are commonly employed to enhance the stability and longevity of rail tracks. This keynote paper focuses mainly on

    research projects undertaken at the University of Wollongong to improve track performance by emphasising the main research

    outcomes and their practical implications. Results from laboratory tests, computational modelling and field trials have shown

    that track behaviour can be significantly improved by the use of geosynthetics, energy-absorbing rubber mats, rubber crumbs

    and infilled-recycled tyres. Full-scale monitoring of instrumented track sections supported by rail industry (ARTC) has been

    performed, and the obtained field data for in situ stresses and deformations could verify the track performance, apart from

    validating the numerical simulations. The research outcomes provide promising approaches that can be incorporated into

    current track design practices to cater for high-speed freight trains carrying heavier loads.

Publication Date


  • 2018

Citation


  • Indraratna, B., Ferreira, F. Bessa., Qi, Y. & Ngo, T. Ngoc. (2018). Application of geoinclusions for sustainable rail infrastructure under increased axle loads and higher speeds. Innovative Infrastructure Solutions, 3 69-1-69-21.

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2992&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1988

Start Page


  • 69-1

End Page


  • 69-21

Volume


  • 3

Place Of Publication


  • Germany

Abstract


  • Given the ongoing demand for faster trains for carrying heavier loads, conventional ballasted railroads require considerable

    upgrading in order to cope with the increasing traffic-induced stresses. During train operations, ballast deteriorates due

    to progressive breakage and fouling caused by the infiltration of fine particles from the surface or mud-pumping from the

    underneath layers (e.g. sub-ballast, sub-grade), which decreases the load bearing capacity, impedes drainage and increases

    the deformation of ballasted tracks. Suitable ground improvement techniques involving geosynthetics and resilient rubber

    sheets are commonly employed to enhance the stability and longevity of rail tracks. This keynote paper focuses mainly on

    research projects undertaken at the University of Wollongong to improve track performance by emphasising the main research

    outcomes and their practical implications. Results from laboratory tests, computational modelling and field trials have shown

    that track behaviour can be significantly improved by the use of geosynthetics, energy-absorbing rubber mats, rubber crumbs

    and infilled-recycled tyres. Full-scale monitoring of instrumented track sections supported by rail industry (ARTC) has been

    performed, and the obtained field data for in situ stresses and deformations could verify the track performance, apart from

    validating the numerical simulations. The research outcomes provide promising approaches that can be incorporated into

    current track design practices to cater for high-speed freight trains carrying heavier loads.

Publication Date


  • 2018

Citation


  • Indraratna, B., Ferreira, F. Bessa., Qi, Y. & Ngo, T. Ngoc. (2018). Application of geoinclusions for sustainable rail infrastructure under increased axle loads and higher speeds. Innovative Infrastructure Solutions, 3 69-1-69-21.

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2992&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1988

Start Page


  • 69-1

End Page


  • 69-21

Volume


  • 3

Place Of Publication


  • Germany