1. Lecturer, College of Civil Engineering, Wuhan Univ., Wuhan 430072, P.R. China.
2. Professor, College of Civil Engineering, and Director, Institute of Geotechnical Engineering, Wuhan Univ., Wuhan 430072; and Professor, Dept. of Hydraulic and Civil Engineering, Tsinghua Univ., Beijing 100084, P.R. China.
3. Practitioner Engineer, Yuncheng Bureau of Highway, Yun-cheng 044000, P.R. China.