1. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
2. Key Laboratory of Road and Railway Engineering Safety Control of Ministry of Education, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
3. China Railway Fifth Survey and Design Institute Group Co., Ltd., Beijing 102600, China
4. School of Transportation Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China