1. Ph.D. Student, Institute of Geotechnical Engineering, Southeast Univ., Nanjing, Jiangsu 210096, China.
2. Professor, Institute of Geotechnical Engineering, Southeast Univ., Nanjing, Jiangsu 210096, China (corresponding author).
3. M.S. Student, Institute of Geotechnical Engineering, Southeast Univ., Nanjing, Jiangsu 210096, China.