Coupled hydro-mechanical analysis of two unstable unsaturated slopes subject to rainfall infiltration

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• 作者：Kuo-Hsin Yang^a ; ^{khy@mail.ntust.edu.tw} ; Ryosuke Uzuoka^b ; ^{uzuoka@tokushima-u.ac.jp} ; Joseph Ng'ang'a Thuo^a ; ^{d10305813@mail.ntust.edu.tw} ; Guan-Liang Lin^a ; ^{andy540882003@gmail.com} ; Yuta Nakai^b ; ^{nakaitoku@gmail.com}
• 关键词：Coupled hydro-mechanical analysis ; Unsaturated soil ; Finite element ; Slope instability
• 刊名：Engineering Geology
• 出版年：2017
• 出版时间：12 January 2017
• 年：2017
• 卷：216
• 期：Complete
• 页码：13-30
• 全文大小：2864 K
• 卷排序：216

文摘

Couple hydro-mechanical analyses of two unstable unsaturated slopes are performed. Failure mechanism and deformation characteristics of the two slopes are investigated and discussed. The accumulated positive porewater pressure at the soil-rock interface mobilized a considerable soil plastic deformation. A positive correlation exists between the slope factor of safety and accumulated rainfall. The infinite slope equation using the porewater pressure obtained from the lower half of the slope could effectively predict the slope factor of safety.