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A series of centrifuge model tests were carried out to investigate effectiveness of toe drainage as countermeasure against failure of embankment and behavior of slopes reinforced with geotextile due to seepage flow, and to evaluate the contribution of reinforcement to the stability of these slopes. It was found that the toe drainage contributes for the stability of the slopes and the embankment which reinforced with toe drainage fails suddenly along a well-defined and large slip surface. In the case with reinforced with geotextiles, smaller shear deformation in the toe area of embankment and the smaller settlement at the top of embankment were observed. It indicate that the pull-out resistance of reinforcements make the slope stability increase. Especially, the embankment that installed non-woven fabrics, which has lager tensile stength, with less reinforcement spacing is highly stable in this study. The factor of safety that obtained by means of limit equilibrium could not accurately evaluate the stability of embankments which installed geotextiles. The reason is that in the stability analysis that on the basis of limit equilibrium, the deformation of embankment that is required to produce the reinforcement force of geotextile was not taken into account

Centrifugal Modeling of Geotextile reinforced Slopes subjected to Seepage Flow.