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Performance Assessment of Geocell-Reinforced Subballast: Modeling and Design Implications

Conference Paper


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Abstract


  • This paper presents a study of the load-deformation behavior of geocell-stabilised subballast subjected to cyclic loads using a large-scale track process simulation apparatus and numerical modelling. The tests and numerical simulations were conducted to mimic the actual track conditions. Subjected to a given frequency and cyclic loads the predicted load-deformation behavior of the subballast with and without geocell inclusions match reasonably with those measured in the laboratory, and show that geocell could effectively decrease the lateral and axial deformations of the reinforced subballast. The results also provide an insight to design of rail tracks capturing the roles of geocell in decreasing lateral deformation of subballast. Additionally, the numerical modelling carried out in this study can be applied in the preliminary design of track substructure where a wide range of subballast aggregates and geocell mattresses with varying strengths and stiffness can be considered.

Publication Date


  • 2017

Citation


  • Ngo, N., Indraratna, B. & Biabani, M. (2017). Performance Assessment of Geocell-Reinforced Subballast: Modeling and Design Implications. In T. L. Brandon & R. J. Valentine (Eds.), Geotechnical Frontiers 2017: Transportation Facilities, Structures, and Site Investigation: Selected Papers from Sessions of Geotechnical Frontiers 2017 (pp. 374-383). Reston, United States: American Society of Civil Engineers.

Scopus Eid


  • 2-s2.0-85018774289

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1265&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/264

Start Page


  • 374

End Page


  • 383

Place Of Publication


  • Reston, United States

Abstract


  • This paper presents a study of the load-deformation behavior of geocell-stabilised subballast subjected to cyclic loads using a large-scale track process simulation apparatus and numerical modelling. The tests and numerical simulations were conducted to mimic the actual track conditions. Subjected to a given frequency and cyclic loads the predicted load-deformation behavior of the subballast with and without geocell inclusions match reasonably with those measured in the laboratory, and show that geocell could effectively decrease the lateral and axial deformations of the reinforced subballast. The results also provide an insight to design of rail tracks capturing the roles of geocell in decreasing lateral deformation of subballast. Additionally, the numerical modelling carried out in this study can be applied in the preliminary design of track substructure where a wide range of subballast aggregates and geocell mattresses with varying strengths and stiffness can be considered.

Publication Date


  • 2017

Citation


  • Ngo, N., Indraratna, B. & Biabani, M. (2017). Performance Assessment of Geocell-Reinforced Subballast: Modeling and Design Implications. In T. L. Brandon & R. J. Valentine (Eds.), Geotechnical Frontiers 2017: Transportation Facilities, Structures, and Site Investigation: Selected Papers from Sessions of Geotechnical Frontiers 2017 (pp. 374-383). Reston, United States: American Society of Civil Engineers.

Scopus Eid


  • 2-s2.0-85018774289

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1265&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/264

Start Page


  • 374

End Page


  • 383

Place Of Publication


  • Reston, United States