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Improved Performance of Railroad Ballast Using Geogrids

  • Chuhao Liu
  • Ngoc Trung Ngo
  • Buddhima IndraratnaEmail author
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 29)

Abstract

Geogrids are commonly used to stabilise and reinforce ballast, and over the various laboratory tests have been carried out to determine how geogrids affect the interface between geogrid and ballast aggregates. This paper presents a critical review and interpretation of the results of large-scale direct shear tests and cyclic tests on key parameters such as the interlocking effects of aperture size and the location of geogrids. Field investigations from sites at Bulli and Singleton as well as findings from Discrete Element Modelling, including the influence zone of geogrid and the linear relationship between geometric anisotropy and stress ratio, are examined and discussed. It also includes a presentation and discussion of analytical modelling for quantifying the geogrid reinforcing effect (pullout tests).

Keywords

Geogrid Ballast Rail transport Discrete element modelling 

Notes

Acknowledgements

The authors greatly appreciate the financial support from the Rail Manufacturing Cooperative Research Centre (funded jointly by participating rail organisations and the Australian Federal Government’s Business Cooperative Research Centres Program) through Project R2.7.1. The performance of stabilised ballast in rail tracks. The author would also like to thank A/Prof Cholachat Rujikiatkamjorn for his guidance and support at various times. The Authors are also grateful to UOW technical staff, namely, Mr. Alan Grant, and Mr. Cameron Neilson for their assistance during the laboratory study.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Chuhao Liu
    • 1
  • Ngoc Trung Ngo
    • 1
  • Buddhima Indraratna
    • 1
    Email author
  1. 1.Centre for Geomechanics and Railway Engineering, University of WollongongWollongongAustralia

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