Abstract
When a road embankment fails due to earthquake, it influences a road network by cutting off traffic at many places. Especially, the failure of trunk road must be prevented against any earthquakes. Therefore, it is necessary to develop an effective countermeasure which restrains a deformation of sliding of the road embankment due to earthquake. This paper proposes a new reinforcement method for existing embankment in which the upper part of embankment is reinforced by a geosynthetics. This method prevents the failure of road embankment by installing the geosynthetics in a shoulder of road embankment. At first, we carried out a full scale model test of the reinforcement method. To apply the reinforcement method to actual embankment, the procedure of construction for the reinforcement method is proposed. Secondary, we carried out a centrifuge model test to verify an effect of this reinforcement method against earthquake. As a result, it was confirmed that the embankment reinforced by the geosynthetics has high earthquake-resistance.
