1. School of Resource and Environmental Engineering, Hefei University of Technology, Hefei, China
2. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai, China
3. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, China
4. Geotechnical Institute, China Jikan Research Institute of Engineering Investigations and Design Co., Ltd, Xi’an, China