Abstract
This study aims to estimate the sample quality of the stiff clays obtained in Amagasaki site, Osaka Bay site, and Kyoto site, and examines if the variation in its consolidation yield stress profile was caused by the variation in residual effective stress of the sample. The samples of these stiff clays have good quality from the practical viewpoint. Within the range of this sample quality, the over consolidation ratio is constant regardless of the degree of disturbance. We conducted three sets of constant strain rate consolidation tests at different setting conditions, with and without soaking in water. From these tests, we could confirm that the consolidation yield stress do not change due to the variation in degree of release of the effective stress.
