1. Civil Engineering Institute of Transportation, Shandong Jiaotong University, Jinan 250357, China
2. Department of Highway and Architecture, Shandong Transport Vocational College, Weifang 261206, China
3. Highway College, Chang’an University, Xi’an 710064, China
4. School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750014, China
5. School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China