1. Ph.D. Student, Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety, Institute of Geotechnical Engineering, Southeast Univ., Nanjing 210096, China.
2. Professor, Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety, Institute of Geotechnical Engineering, Southeast Univ., Nanjing 210096, China (corresponding author).
3. Professor, Dept. of Civil and Materials Engineering, Univ. of Illinois, Chicago, IL 60607.
4. Research Associate, State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; formerly, Ph.D. Student, Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety, Institute of Geotechnical Engineering, Southeast Univ., Nanjing 210096, China.