1. Research Assistant, Highway Engineering Key Laboratory of Sichuan Province, School of Civil Engineering, Southwest Jiaotong Univ., Chengdu 610031, China.
2. Professor, Highway Engineering Key Laboratory of Sichuan Province, School of Civil Engineering, Southwest Jiaotong Univ., Chengdu 610031, China (corresponding author).
3. Asistant Professor, Highway Engineering Key Laboratory of Sichuan Province, School of Civil Engineering, Southwest Jiaotong Univ., Chengdu 610031, China.
4. Professor, Highway Engineering Key Laboratory of Sichuan Province, School of Civil Engineering, Southwest Jiaotong Univ., Chengdu 610031, China.