1. Ph.D. Student, Dept. of Geotechnical Engineering, Tongji Univ., Shanghai 200092, China; Ph.D. Student, Dept. of Civil Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan.
2. Professor, Dept. of Geotechnical Engineering, Tongji Univ., Shanghai 200092, China (corresponding author).
3. Professor, Dept. of Geotechnical Engineering, Tongji Univ., Shanghai 200092, China; Professor, Dept. of Civil Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan.
4. Ph.D. Student, Dept. of Geotechnical Engineering, Tongji Univ., Shanghai 200092, China.