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Use of geosynthetics in railways including geocomposites and vertical drains

Conference Paper


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Abstract


  • Australia relies heavily on rail for the transportation of bulk commodities and

    passenger services, and has introduced faster and heavier trains in recent years due to a

    growing demand. Large cyclic loading from heavy haul and passenger trains often

    leads to progressive deterioration of the track. The excessive deformations and

    degradations of the ballast layer and unacceptable differential settlement or pumping

    of underlying soft and compressible subgrade soils necessitate frequent costly track

    maintenance works. A proper understanding of load transfer mechanisms and their

    effects on track deformations are essential prerequisites for minimising maintenance

    costs. The reinforcement of the track by means of geosynthetics leads to significant

    reduction in the downward propagation of stresses and assures more resilient longterm

    performance. The geocomposite serves the functions of reinforcement, drainage

    and separation, thereby reducing the vertical and lateral deformations. Stabilization of

    soft subgrade soils by using prefabricated vertical drains (PVDs) is also essential for

    improving the overall stability of track and to reduce the differential settlement during

    the operation of trains. The effectiveness of using geocomposite geosynthetic and

    PVDs has been observed through field measurements and finite element analyses.

    These have been the first fully instrumented, comprehensive field trials carried out in

    Australian Railways, and it was very encouraging to see the field observations

    matching the numerical predictions.

Publication Date


  • 2011

Citation


  • Indraratna, B., Rujikiatkamjorn, C. & Nimbalkar, S. (2011). Use of geosynthetics in railways including geocomposites and vertical drains. In J. Han & D. E. Alzamora (Eds.), Geo-Frontiers 2011: Advances in Geotechnical Engineering (pp. 4733-4742). USA: American Society of Civil Engineers.

Scopus Eid


  • 2-s2.0-79956368580

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1935&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/898

Has Global Citation Frequency


Start Page


  • 4733

End Page


  • 4742

Place Of Publication


  • USA

Abstract


  • Australia relies heavily on rail for the transportation of bulk commodities and

    passenger services, and has introduced faster and heavier trains in recent years due to a

    growing demand. Large cyclic loading from heavy haul and passenger trains often

    leads to progressive deterioration of the track. The excessive deformations and

    degradations of the ballast layer and unacceptable differential settlement or pumping

    of underlying soft and compressible subgrade soils necessitate frequent costly track

    maintenance works. A proper understanding of load transfer mechanisms and their

    effects on track deformations are essential prerequisites for minimising maintenance

    costs. The reinforcement of the track by means of geosynthetics leads to significant

    reduction in the downward propagation of stresses and assures more resilient longterm

    performance. The geocomposite serves the functions of reinforcement, drainage

    and separation, thereby reducing the vertical and lateral deformations. Stabilization of

    soft subgrade soils by using prefabricated vertical drains (PVDs) is also essential for

    improving the overall stability of track and to reduce the differential settlement during

    the operation of trains. The effectiveness of using geocomposite geosynthetic and

    PVDs has been observed through field measurements and finite element analyses.

    These have been the first fully instrumented, comprehensive field trials carried out in

    Australian Railways, and it was very encouraging to see the field observations

    matching the numerical predictions.

Publication Date


  • 2011

Citation


  • Indraratna, B., Rujikiatkamjorn, C. & Nimbalkar, S. (2011). Use of geosynthetics in railways including geocomposites and vertical drains. In J. Han & D. E. Alzamora (Eds.), Geo-Frontiers 2011: Advances in Geotechnical Engineering (pp. 4733-4742). USA: American Society of Civil Engineers.

Scopus Eid


  • 2-s2.0-79956368580

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1935&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/898

Has Global Citation Frequency


Start Page


  • 4733

End Page


  • 4742

Place Of Publication


  • USA