Abstract
Seismic slope stability of a high-rise fill embankment was thoroughly investigated. The high-rise fill embankment was constructed on a ravine with mountain stream for the development of a housing lot thirty-five years ago. Since the fill embankment is located in the middle part of Japan, a seismically active area, possible failure during earthquake has been carefully examined through geotechnical surveys, field and laboratory tests, and calculations of vibration behavior and slope stability for two years. In this paper, we present the applicability of these survey and analysis methods to assess a failure risk of fill embankments as well as the results of the investigation and calculation conducted in this study.