FIELD INVESTIGATION OF WEATHERING IN HIROSHIMA GRANITE

Abstract

A set of field investigations was carried out for more than two years at a site of weathered granite in the vicinity of Hiroshima City to examine geological and mineralogical characteristics of weathering. Field investigations include geological survey, borehole lateral load test, cone penetration test, in-situ elastic wave exploration test, insitu density test and plate loading test. The geological investigation shows that the site weathering is characterized by several clay veins and the test results indicate that the initial value gradually deteriorates down as time goes by. The results of plate loading test show that failure pattern observed was typical of local shear failure and significant particle crushing was observed beneath the footing.