LIU Xiaoming1†,TU Shujie1,YANG Dong2,YANG Zexi1,LIU Tao3
(1.College of Civil Engineering, Hunan University, Changsha 410082, China; 2.China Construction Fifth Engineering Bureau Co. Ltd., Changsha 410004, China; 3.China Highway Planning and Design Insititute consultants Inc., Beijing 100088, China)