1. Research Institute of Highway Ministry of Transport, Beijing100088, China
2. Hebei Expressway Jing-Xiong Management Center, Xiong’an, Hebei071700, China
3. School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei050018, China
4. College of Chemical & Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei050018, China