1. School of Engineering and Technology, Zunyi Normal College, Xinpu, Zunyi, China
2. College of Civil Engineering, Chongqing University, Shazhengjie, Shapingba, Chongqing, China
3. Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Shazhengjie, Shapingba, Chongqing, China