Abstract
In every year, the slope failure of embankment frequently took place in Japan. Main factors of such embankment failure are seepage flow in the embankment and surface erosion as well as lateral flow of the backfill due to saturation. It was considered that embankment stability against rainfall can be increase by draining of the porewater at the toe of slope as well as reinforcing of the backfill by using geosynthetics. In this paper, the effects of drainage of the porewater and reinforcing of the backfill with geosynthetics on embankment stability against rainfall were investigated by performing of a series of laboratory model tests. As the results of model tests, it was confirmed that drainage of the porewater and reinforcing of the backfill with geosynthetics is effective method to improvement embankment stability against rainfall.
