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Performance evaluation of railway subballast stabilised with geocell based on pull-out testing

Journal Article


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Abstract


  • A large-scale apparatus was designed and built at the University of Wollongong to evaluate the pull-out

    strength of rail subballast reinforced with geocells. A series of tests were carried out to investigate the

    pull-out resistance, mobilised tensile strength (ttensile) and passive strength (tpassive) of a subballastgeocell

    assembly under a given range of overburden pressure (1 kPa < q < 45 kPa). The interface was

    held in a vertical alignment to better simulate the interaction between subballast and geocell in accordance

    with routine track practices. The test results show that the geocell reinforcement provides a

    considerable degree of passive resistance, where the opening area (OA) and lateral pressure (sn) over the

    geocell strip are found to be influential factors. A three-dimensional finite element simulation was also

    conducted. The numerical results show that the tensile strength mobilised in the geocell will increase as

    the geocell stiffness increases, but causes a reduction in tpassive. A parametric study was also developed to

    investigate the impact of geocell stiffness and friction coefficient on the passive resistance and mobilised

    tensile strength. These results indicate that the passive resistance and mobilised tensile strength increase

    with the increase in overburden pressure (q) and friction coefficient (d).

Publication Date


  • 2016

Citation


  • Biabani, M. Mahdi., Ngo, N. Trung. & Indraratna, B. (2016). Performance evaluation of railway subballast stabilised with geocell based on pull-out testing. Geotextiles and Geomembranes, 44 (4), 579-591.

Scopus Eid


  • 2-s2.0-84963533219

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6795&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5767

Has Global Citation Frequency


Number Of Pages


  • 12

Start Page


  • 579

End Page


  • 591

Volume


  • 44

Issue


  • 4

Place Of Publication


  • United Kingdom

Abstract


  • A large-scale apparatus was designed and built at the University of Wollongong to evaluate the pull-out

    strength of rail subballast reinforced with geocells. A series of tests were carried out to investigate the

    pull-out resistance, mobilised tensile strength (ttensile) and passive strength (tpassive) of a subballastgeocell

    assembly under a given range of overburden pressure (1 kPa < q < 45 kPa). The interface was

    held in a vertical alignment to better simulate the interaction between subballast and geocell in accordance

    with routine track practices. The test results show that the geocell reinforcement provides a

    considerable degree of passive resistance, where the opening area (OA) and lateral pressure (sn) over the

    geocell strip are found to be influential factors. A three-dimensional finite element simulation was also

    conducted. The numerical results show that the tensile strength mobilised in the geocell will increase as

    the geocell stiffness increases, but causes a reduction in tpassive. A parametric study was also developed to

    investigate the impact of geocell stiffness and friction coefficient on the passive resistance and mobilised

    tensile strength. These results indicate that the passive resistance and mobilised tensile strength increase

    with the increase in overburden pressure (q) and friction coefficient (d).

Publication Date


  • 2016

Citation


  • Biabani, M. Mahdi., Ngo, N. Trung. & Indraratna, B. (2016). Performance evaluation of railway subballast stabilised with geocell based on pull-out testing. Geotextiles and Geomembranes, 44 (4), 579-591.

Scopus Eid


  • 2-s2.0-84963533219

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6795&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5767

Has Global Citation Frequency


Number Of Pages


  • 12

Start Page


  • 579

End Page


  • 591

Volume


  • 44

Issue


  • 4

Place Of Publication


  • United Kingdom