1. Lecturer, Geotechnical and Structural Engineering Research Center, Shandong Univ., Jinan 250061, China; and Lecturer, State Key Laboratory for Geomechanics and Deep Underground Engineering, China Univ. of Mining and Technology, Xuzhou 221116, China (corresponding author).
2. Associate Professor, Geotechnical and Structural Engineering Research Center, Shandong Univ., Jinan 250061, China.
3. Ph.D. Candidate, Geotechnical and Structural Engineering Research Center, Shandong Univ., Jinan 250061, China.