1. Professor, Dept. of Civil Engineering, National Univ. of Singapore, Kent Ridge, Singapore (corresponding author).
2. Director, GeoSoft Pte. Ltd., 2 Kaki Bukit Place #07-00 Tritech Building, Singapore 416180.
3. Principal Geotechnical Engineer, AECOM Australia Pty Ltd., 3 Forrest Place, Perth, WA 6000, Australia.
4. Senior Geotechnical Engineer, Butler Partners Pty Ltd., 79 Doggett Street, Newstead, QLD4006, Australia.