TITLE

Slope Stability Analysis of a Weathered Granitic Hillslope as Effects of Soil Thickness

AUTHOR(S)
Mukhlisin, Muhammad; Taha, Mohd. Raihan
PUB. DATE
May 2009
SOURCE
European Journal of Scientific Research;May2009, Vol. 30 Issue 1, p36
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Modeling rainwater infiltration in slopes is vital to the analysis of slope failure induced by heavy rainfall. In weathered granitic soil formation, typical slope failures that occurred in Japan are on ranging between 50 and 300 cm depths. In this study, a numerical model was developed to estimate the extent of rainwater infiltration into an unsaturated slope, the formation of a saturated zone, and the change in slope stability. This model is then used to analyze the effects of soil thickness on the occurrence of slope failure. Results showed that the thickness of soil is a significant parameter in slope stability analysis. A shallow soil depth resulted in greater discharge volume and a lower peak pore water pressure during the major rainfall event, and consequently the slope failure tends not to occur. However a deeper soil depth increased the weight of solids and the soil moisture conditions in the slope and the pore water pressure which the increased likelihood of slope failure.
ACCESSION #
41036005

 

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