1. Professor, Dept. of Geotechnical Engineering, Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji Univ., Shanghai 200092, China; College of Engineering, Tibet Univ., Lasa 850000, China.
2. Dept. of Geotechnical Engineering, Tongji Univ., Shanghai 200092, China.
3. Associate Professor, Dept. of Geotechnical Engineering, Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji Univ., Shanghai 200092, China (corresponding author).
4. Engineer, Dept. of Geotechnical Engineering, Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji Univ., Shanghai 200092, China.
5. Professor, Dept. of Civil and Environmental Engineering, Univ. of Miyazaki, Miyazaki 889-2192, Japan.