[Wang, Zhi-Chao;Kuang, Du-Min;Wang, Wei-guo] Xiangtan Univ, Hunan Key Lab Geomech & Engn Safety, Xiangtan 411105, Peoples R China.^[Wang, Zhi-Chao;Luo, Ying-She] Cent South Univ Forestry & Technol, Hunan Prov Key Lab Engn Rheol, Changsha 410004, Hunan, Peoples R China.^[Zhao, Tao] Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China.