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