1. Professor, Dept. of Geotechnical Engineering, College of Civil Engineering, Tongji Univ., 1239 Siping Rd., Shanghai 200092, PR China.
2. Senior Engineer, CREEC East China Survey and Design Co., Ltd., Floor 24, Haili Bldg., 88 Dapu Rd., Shanghai 200023, PR China.
3. Associate Professor, Dept. of Civil Engineering, Shanghai Univ., 99 Shangda Rd., Shanghai 200444, PR China (corresponding author).
4. Graduate Student, Dept. of Geotechnical Engineering, College of Civil Engineering, Tongji Univ., 1239 Siping Rd., Shanghai 200092, PR China.