1. Ph.D. Candidate, School of Transportation, Southeast Univ., Nanjing 211189, China.
2. Assitant Professor, State Key Laboratory of Silicate Materials for Architectures, Wuhan Univ. of Technology, Wuhan 430070, China.
3. Engineer, Changjiang Institute of Survey, Planning, Design and Research, No. 1863, Jiefang Ave., Wuhan 430010, China.
4. Professor, School of Transportation, Southeast Univ., Nanjing 211189, China (corresponding author).