Abstract
The 2004 Niigata-Ken Chuetsu Earthquake caused great damage to embankments and retaining walls. The possible primary factor relevant to the great damage is loosened ground induced by a rain of typhoon before the earthquake. This paper describes the investigation of the relevance of the earthquake and heavy rainfall to the structures' damage and mainly reports results of the dynamic analysis. The locations of the analytical model are 220km300m and 221km000m of Jouetsu line. Response accelerations and deformation of the damaged and restored embankments were compared based on the results by the dynamic analysis. It is clearly shown that the seismic stability of the restored embankments significantly improved as compared to that of the damaged embankment.
