1. Doctoral Candidate, Highway School, Chang’an Univ., Xi’an, Shaanxi 710064, China.
2. Professor, Key Laboratory of Road Structure and Material Ministry of Transport, Chang’an Univ., Xi’an, Shaanxi 710064, China (corresponding author).
3. Master Degree, Highway School, Chang’an Univ., Xi’an, Shaanxi 710064, China.