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