Abstract
There are many uncertainties involved in the shear characteristics during the vane shear strength development. Therefore, when the mechanism of the vane shear strength development becomes further clarified in the future, the vane shear strengths may be calculated more reasonably than at present. In this study, the shear characteristic around the vane was observed in an experiment where a vane shear test was simulated for the reconstructed test specimen obtained from the X-ray CT scanning to examine the developmental mechanism of the torque involved in the vane shear test. As a result, it was found that the shear zone was not developed in the perimeter of the vane during development of the vane shear strength. During the maximum torque development, the shear zone was formed throughout the perimeter of the vane, and it was inferred that the majority of maximum torque was developed due to the resistance caused by the soil sample located in the front side of the vane.
