1. Professor, Institute of Geotechnical Engineering, Southeast Univ., Nanjing, Jiangsu, China, 210096 (corresponding author).
2. Lecturer, Institute of Geotechnical Engineering, Southeast Univ., Nanjing, Jiangsu, China, 210096.
3. Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Kansas, Lawrence, KS 66045.
4. Ph.D. candidate, Institute of Geotechnical Engineering, Southeast Univ., Nanjing, Jiangsu, China, 210096.
5. Ph.D. student, Institute of Geotechnical Engineering, Southeast Univ., Nanjing, Jiangsu, China, 210096.