1. School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, Sichuan, PR China
2. Department of Geological Engineering and MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu, Sichuan, PR China
3. State–Province Joint Engineering Laboratory of Spatial Information Technology for High-Speed Railway Safety, Chengdu, Sichuan, PR China (corresponding author: )
4. Department of Geological Engineering, Southwest Jiaotong University, Chengdu, Sichuan, PR China
5. State–Province Joint Engineering Laboratory of Spatial Information Technology for High-Speed Railway Safety, Chengdu, Sichuan, PR China