STABILITY EVALUATION OF REINFORCED EMBANKMENTS BY CENTRIFUGE EXPERIMENT

As to an embankment reinforced with extensible materials like geogrids, reinforcement effect appears with deformation occurring in the embankment. In order to evaluate the actual stability of reinforced embankments, it is necessary to take account of the embankment deformation, In this paper, the influence of slope gradient and reinforcement length on the failure mode and the failure height of embankments on hard ground was investigated by centrifuge model tests. As a result, in case that the slope gradient is steep, slip surface approximately becomes plane. Also, it was found that the embankment deformation increasing with the gravitational acceleration could be expressed by a method with consideration for deformation.