ZHAI Yue1,2, AI Xiao-qin1, DENG Zi-chen2, HE Wei3
(1. School of Geology Engineering and Geomatics, Changan Univ, Xi’an,Shaanxi710054, China; 2.School of Mechanics and Civil & Architecture, Northwestern Polytechnical Univ, Xi’an,Shaanxi710061 China; 3. Hualu Engineering Technology Co.,LTD, Xi’an,Shaanxi710065, China)