LI Zheng-liang1, 2 ,YU Wei1,HU Hao1,LIU Xin-peng1, WANG Ling-xi1
(1. College of Civil Engineering, Chongqing Univ, Chongqing400045, China;2. Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing Univ), Ministry of Education, Chongqing400045, China)