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Slope Stability Analysis of Embankment Resting on Granular Columns Using FEM
Date Issued
01-01-2020
Author(s)
Jayapal, J.
Rajagopal, K.
Abstract
A 2D finite element analysis was conducted to obtain the factor of safety against deep-seated failure of embankments resting on granular columns. Two methods, namely individual column method and equivalent area method, are used to compute the safety factor (FOS). The results of the parametric analysis with the prime factors that influence FOS say the undrained cohesion of soft deposit, friction angle of the granular column and embankment, the height of embankment, groundwater table variation have been examined. The comparative study shows that the individual column method yields a slightly high safety factor over the equivalent area method. Nevertheless, the equivalent area method is a quick, easy method to obtain a factor of safety which speaks on the overall improvement of the homogenized ground. Additionally, a reduction factor was proposed to account for the difference in FOS when individual column method is converted to equivalent area method.
Volume
85