Instability of unsaturated soil slopes due to infiltration

This paper presents a procedure for calculating the safely factor for an unsaturated slope suffering from rainfall infiltration. The process of infiltration into a slope due to rainfall and its effect on soil slope behavior were examined using a two-dimensional finite element flow deformation coupled analysis program. The modified Mohr-Coulomb failure criterion was adopted for unsaturated soil strength to consider variations in strength due to the presence of matric suction. A safety factor was calculated based on the smoothed stress field obtained from finite element analysis, and an optimization technique was used to search for a critical slip surface. Some numerical examples are analyzed. The results illustrate a typical process of infiltration into unsaturated soil slopes and the effect of hydraulic conductivity on slope stability during rain-induced infiltration. (C) 2001 Elsevier Science Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2001
Language
ENG
Keywords

FINITE-ELEMENT ANALYSIS; STABILITY; SEEPAGE

Citation

COMPUTERS AND GEOTECHNICS, v.28, no.3, pp.185 - 208

ISSN
0266-352X
DOI
10.1016/S0266-352X(00)00027-6
URI
http://hdl.handle.net/10203/9755
Appears in Collection
CE-Journal Papers(저널논문)
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