1. Senior Geotechnical Engineer, Wood E&IS, #401, 1925 18th Ave. NE, Calgary, AB, Canada T2E 7T8; Assistant Professor, Dept. of Civil Engineering, Faculty of Engineering-Shoubra, Benha Univ., Banha 13511, Egypt (corresponding author).
2. Professor, Dept. of Civil and Environmental Engineering, Western Univ., London, ON, Canada N6A 5B9.