1. School of Civil Enginnering, Chongqing Three Gorges University, Chongqing, China
2. Chongqing Engineering Research Center of Disaster Prevention & Control for Banks and Structures in Three Gorges Reservoir Area, China
3. School of Mathematics and Statistics, Chongqing Three Gorges University, Chongqing, China
4. Department of EOR, Research Institute of Shaanxi Yanchang Petroleum (Group) Company, Ltd, Xi’an,China
5. School of Safety Enginnering, Chongqing University of Science and Technology, Chongqing China