サーチャージ除荷後の体積変化と有効応力経路

概要

論文の詳細を見る
The principal purpose of this study is to investigate the effects of dilatancy which exert influence on the settlement after surcharge unloading and reloading. In this paper, the characteristic of dilatancy and the volumetric change which occurs under the condition that the effective mean normal stress and principal stress ratio is held constant, are examined performing stress-controlled drained triaxial loading, unloading and reloading tests on IK_0 and isotropic consolidated clays. The main results obtained can be summarized as follows : 1) The void ratio change differs with each effective stress path in surcharge unloading. Moreover, it was also indicated that Modified Cam Clay Model can not explain this phenomenon well. 2) Volumetric change after surcharge unloading increases with the decreases in effective mean normal stress and decreases with the deviator stress decrease. 3) The negative dilatancy was obserebed in unloading and reloading tests that was applied under the condition of constant effective mean normal stress.
東海大学の論文