[1] Xian Univ Architecture & Technol, Sch Civil Engn, Xian, Peoples R China
[2] Shaanxi Key Lab Geotech & Underground Space Engn, Xian, Peoples R China
[3] Xian Univ Architecture & Technol, Sch Sci, Xian, Peoples R China
[4] King Abdulaziz Univ, Fac Sci, Dept Math, POB 80203, Jeddah 21589, Saudi Arabia