Chapter
Mar 30, 2017
Performance Assessment of Geocell-Reinforced Subballast: Modeling and Design Implications
Authors: Ngoc Trung Ngo, Ph.D. [email protected], Buddhima Indraratna, Ph.D., F.ASCE [email protected], and Michael M. Biabani, Ph.D. [email protected]Author Affiliations
Publication: Geotechnical Frontiers 2017
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.
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© 2017 American Society of Civil Engineers.
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Published online: Mar 30, 2017
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Research Fellow, Centre for Geomechanics and Railway Engineering, Faculty of Engineering and Information Sciences, Univ. of Wollongong, Wollongong City, NSW 2522, Australia; ARC Centre for Excellence for Geotechnical Science and Engineering, Australia Faculty of Engineering, Australia. E-mail: [email protected]
Research Director, Distinguished Professor of Civil Engineering, Centre for Geomechanics and Railway Engineering, Faculty of Engineering and Information Sciences, Univ. of Wollongong, Wollongong, NSW 2522, Australia; ARC Centre for Excellence for Geotechnical Science and Engineering, Australia. E-mail: [email protected]
Coffey Geotechnics Private Ltd., Australia. E-mail: [email protected]
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