Abstract
Direct shear tests have been done to determine shearing properties of overconsolidated clays under consideration of microscopic view. The conditions of the clay are selected as follows. Kaolin clay is using as solid phase and conditions of liquid phase are selected for following three types, W-clay, Na-clay, and K-clay, The conditions of consolidation pressure are also selected five conditions. The microstructure of the clays are changed by these conditions. The degrees of the ped orientation are also changed. The results of the direct shear tests are shown different shearing characteristics that are selected different direction of ped (clay particle's orientation). The width of the shearing zone that the specimens with minus direction of ped are shown greater than plus conditions.
