GEOTECHNICAL FEATURES OF SOILS AND ROCKS RELATED TO LANDSLIDES OF TERTIARY FRACTURE ZONE TYPE IN JAPAN

Abstract

Index properties and shearing strength of soils and mudstone taken from several landslides of Tertiary fractured region were investigated. The results showed that the sliding soils, often referred to as "blue-black clays", have similar properties, and that the sliding diatomaceous earth has properties considerably different from the "blue-black clays". The bed rock of sliding areas, being mudstone in most cases, shows the phenomenon of slaking. The features of slip planes were found in some of the test pits burrowed in sliding areas.