1. Ph.D. Candidate, Dept. of Geotechnical Engineering, College of Civil Engineering, Tongji Univ., Shanghai 200092, China.
2. Associate Professor, Dept. of Geotechnical Engineering, Tongji Univ., Shanghai 200092, China (corresponding author).
3. Senior Engineer, Dept. of Geology Survey and Design, Guizhou Transportation Planning Survey and Design Academy Co. Ltd., Guiyang 550001, China.