Centrifuge model tests on stability of soil structure due to heavy rainfall

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A series of centrifuge model tests were carried out to investigate the performance of embankment and multi-anchored soil wall during rainfall. The conclusions of this study are followed. 1)It is necessary to consider the apparent cohesion of soil for surface failure of embankment, because it would lose with disappearance the suction originated from increasing the degree of saturation. 2)Surface failure was occurred suddenly in the case with the embankment which structured with low degree of saturation in spite of difference intensity of the rain. 3)Heavy rain that classified the terribly rain (over 80mm/hr) caused the surface failure immediately despite of same amount of rain. 4)It is important to maintain the drainage of reinforced soil wall for stable condition during rain.