INFLUENCE OF FABRIC ORIENTATION TO THE PERMEABILITY AND DYNAMIC CHARACTERISTICS OF HYDRAULIC-FILLED SAND

概要

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In this research, several different kinds of specimen's preparation methods which include the hydraulic transportation method (HY), multiple sieving pluviation method (MSP) and wet-tamped method (WT) were used to compare their initial fabric. Moreover, the anisotropic permeability test was performed to those three kinds of specimens. Then, a series of cyclic simple shear tests was conducted on the specimens of HY and WT to investigate the dynamic deformation properties of the sand. The influence of fabric orientation for each kind of specimens to both permeability and dynamic deformation properties were discussed based on the testing results. It is observed that the difference in fabric orientation of the testing soil given by various sample preparation methods results in the difference of permeability and liquefaction resistance. On the other hand, the strength as well as deformation properties obtained by different shearing apparatus appear to have different results. Nevertheless, from the viewpoint of fabric orientation with respect to flowing direction and shearing force direction, an identical conclusion can be obtained. These phenomena demonstrate that the anisotropic characteristics of the soil have significant effect on the permeability, shearing strength and deformation behavior.