1. State Key Laboratory of Moutain Bridge and Tunnel Engineering, Chongqing, P.R. China
2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing, P.R. China
3. Guangzhou North Second Ring Traffic Technology Co., Ltd, Guangzhou, P.R. China
4. School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing, P.R. China
5. Department of Track and Electrical Engineering, Chongqing Jianzhu College, Chongqing, P.R. China