1. School of Civil Engineering, Central South University, Changsha 410075, China
2. Xinyun Engineering Co., Ltd. of China Railway First Group Co, Ltd., Xianyang 712000, China
3. National Engineering Laboratory for High-Speed Railway Construction, Central South University, Changsha 410075, China
4. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
5. Changsha Metro Group Co., Ltd., Changsha 410019, China