1. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, China
2. School of Qilu Transportation, Shandong University, Jinan, China
3. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China
4. Technology r&d center, Shandong Provincial Transportation Planning and Design Institute, Jinan, China