1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
3. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
4. School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China