1. Associate Professor, College of Civil and Transportation Engineering, National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai Univ., Nanjing, China 210098 (corresponding author).
2. Professor, Key Lab of Ministry of Education for Geomechanics and Embankment Engineering, Geotechnical Research Institute of Hohai Univ., Nanjing, China 210098.
3. Assistant Professor, Dept. of Civil Engineering, Ryerson Univ., Toronto, Canada.
4. Associate Professor, Geotechnical Research Institute of Hohai Univ., Nanjing, China 210098.