1. Ph.D. Candidate, School of Highway, Chang’an Univ., Xi’an 710064, China.
2. Professor, School of Highway, Chang’an Univ., Xi’an 710064, China (corresponding author).
3. Ph.D. Candidate, College of Civil and Construction Engineering, Oregon State Univ., Corvallis, OR 97331.
4. Engineer, State Key Laboratory of Rail Transit Engineering Informatization, China Railway First Survey and Design Institute Group Co., Ltd., No. 2 Xiying Ave., Xi’an 710043, China.
5. Engineer, China Gezhouba Group Investment Holdings Co., Ltd., Gezhouba Tower, No. 558 Jiefang Ave., Wuhan 430000, China.