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Enhancement of rail track performance through utilisation of geosynthetic inclusions

Journal Article


Abstract


  • In coastal regions of Australia, high population density and increased traffic volumes have led to rapid expansion of rail

    transport. Use of artificial inclusions such as polymeric geosynthetics for enhanced soil-structure interaction and rubber shock mats for

    absorbing energy with the aim of reducing particle breakage is described in this paper as a cost-effective option. This paper highlights the

    results of a laboratory study on the deformation of coal fouled ballast stabilised with geogrids, at various degrees of fouling. A novel Track

    Process Simulation Apparatus (TPSA) was employed to reproduce realistic rail track conditions under cyclic loading, and the Void

    contaminant index (VCI) was used to assess the level of ballast fouling. The beneficial aspects of the geogrid inclusion are discussed in the

    paper. Laboratory results showed that biaxial geogrids can reduce the deformation of fresh ballast, but their effectiveness diminishes with an

    increase of VCI. A threshold value of VCI was proposed in view of track maintenance. Comprehensive field trials were executed on two fullscale

    rail tracks in the towns of Bulli and Singleton in New South Wales. These trials facilitated the evaluation of the relative performance of

    different types of geogrids, geocomposites and shock mats installed in fully instrumented track sections. Field trials showed that the use of

    recycled ballasted in rail tracks was a feasible and effective alternative. The performance of geogrids and geocomposite was found to be

    associated with their geometrical and mechanical properties as well as with the type of subgrade. The distributions of vertical and lateral

    stresses in the track were also assessed. In addition, effects of magnitude of axle load and train speed on stress distributions were studied.

Publication Date


  • 2014

Citation


  • Indraratna, B., Nimbalkar, S. & Rujikiatkamjorn, C. (2014). Enhancement of rail track performance through utilisation of geosynthetic inclusions. Geotechnical Engineering, 45 (1), 17-27.

Scopus Eid


  • 2-s2.0-84900628202

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2145

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 17

End Page


  • 27

Volume


  • 45

Issue


  • 1

Place Of Publication


  • Thailand

Abstract


  • In coastal regions of Australia, high population density and increased traffic volumes have led to rapid expansion of rail

    transport. Use of artificial inclusions such as polymeric geosynthetics for enhanced soil-structure interaction and rubber shock mats for

    absorbing energy with the aim of reducing particle breakage is described in this paper as a cost-effective option. This paper highlights the

    results of a laboratory study on the deformation of coal fouled ballast stabilised with geogrids, at various degrees of fouling. A novel Track

    Process Simulation Apparatus (TPSA) was employed to reproduce realistic rail track conditions under cyclic loading, and the Void

    contaminant index (VCI) was used to assess the level of ballast fouling. The beneficial aspects of the geogrid inclusion are discussed in the

    paper. Laboratory results showed that biaxial geogrids can reduce the deformation of fresh ballast, but their effectiveness diminishes with an

    increase of VCI. A threshold value of VCI was proposed in view of track maintenance. Comprehensive field trials were executed on two fullscale

    rail tracks in the towns of Bulli and Singleton in New South Wales. These trials facilitated the evaluation of the relative performance of

    different types of geogrids, geocomposites and shock mats installed in fully instrumented track sections. Field trials showed that the use of

    recycled ballasted in rail tracks was a feasible and effective alternative. The performance of geogrids and geocomposite was found to be

    associated with their geometrical and mechanical properties as well as with the type of subgrade. The distributions of vertical and lateral

    stresses in the track were also assessed. In addition, effects of magnitude of axle load and train speed on stress distributions were studied.

Publication Date


  • 2014

Citation


  • Indraratna, B., Nimbalkar, S. & Rujikiatkamjorn, C. (2014). Enhancement of rail track performance through utilisation of geosynthetic inclusions. Geotechnical Engineering, 45 (1), 17-27.

Scopus Eid


  • 2-s2.0-84900628202

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2145

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 17

End Page


  • 27

Volume


  • 45

Issue


  • 1

Place Of Publication


  • Thailand