1. Candidate in Geotechnical Engineering, Dept. of Civil and Construction Engineering, Swinburne Univ. of Technology, Melbourne 3122, Australia.
2. Senior Lecturer in Geotechnical Engineering, Dept. of Infrastructure Engineering, Univ. of Melbourne, Melbourne 3010, Australia (corresponding author).
3. Senior Lecturer in Geotechnical Engineering, Dept. of Civil and Construction Engineering, Swinburne Univ. of Technology, Melbourne 3122, Australia.
4. Professor in Geotechnical Engineering, Dept. of Civil and Construction Engineering, Swinburne Univ. of Technology, Melbourne 3122, Australia.