1. Department of Geotechnical Engineering, School of Civil Engineering, Central South University, Changsha, Hunan, China
2. MOE Key Laboratory of Engineering Structures of Heavy-haul Railway, Central South University, Changsha, Hunan, China
3. School of Civil Engineering, Changsha University of Science and Technology, Changsha, Hunan, China
4. China Railway Siyuan Survey And Design Group Co.; LTD, Wuhan, China