1. Graduate Student, School of Civil Engineering and Architecture, Southwest Petroleum Univ., Chengdu 610500, PR China.
2. Professor, School of Civil Engineering and Architecture, Southwest Petroleum Univ., Chengdu 610500, PR China (corresponding author).
3. Associate Professor, School of Civil Engineering and Architecture, Southwest Petroleum Univ., Chengdu 610500, PR China.
4. School of Geoscience and Technology, Southwest Petroleum Univ., Chengdu 610500, PR China.
5. School of Mechatronic Engineering, Southwest Petroleum Univ., Chengdu 610500, PR China.