1. Research Associate, Faculty of Engineering, Univ. of Wollongong, Wollongong City, NSW 2522, Australia.
2. Professor of Civil Engineering, Faculty of Engineering, Univ. of Wollongong, Wollongong City, NSW 2522, Australia (corresponding author).
3. Associate Professor, Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati—718 039, India.
4. Geotechnical and Civil Engineer, Hazelbrook, NSW 2779, Australia; Formerly, Senior Geotechnical Advisor, RailCorp, NSW 2777, Australia.