1. Associate Professor, Dept. of Civil & Structural Engineering, Hong Kong Polytechnic Univ., Hunghom, Hong Kong (corresponding author).
2. Chairman, Dae Won Soil Company Limited, 29-11 Karakbon-dong, Songpa-gu, Seoul, Korea.
3. Associate Professor, Dept. of Civil Engineering, Univ. of Hong Kong, Pokfulam Rd., Hong Kong.
4. Professor and Deputy Head, Dept. of Civil Engineering, Univ. of Hong Kong, Pokfulam Rd., Hong Kong.
5. Assistant Professor, Dept. of Civil Engineering, Univ. of Hong Kong, Pokfulam Rd., Hong Kong.