SHEAR CHARACTERISTICS OF SANDSTONE MATERIALS IN SLOPE FAILUER DURING THE 2004 NIIGATA-KEN CHUETSU EARTHQUAKE

Abstract

Many slope failures occared during the Niigata-ken Chuetsu Earthquake. The damage area is know as land slide -prone area of green-tuff, with geological structures of active folding. Slopes ara composed of weak sedimentation rock, alternative layers of strongly mudstone and sandstone materials.
In order to investigate shear characteristic of sandstones due to slope failures during earthquakes, a series of unconfined compression test and undrained shar triaxial test were performed in this study on intact samples of Higashi-Takezawa, Yamakoshi Villege.