Modulus of Deformation Determined by Unconfined Compression Test Using Specimen Trimmed Out Horizontally

Abstract

A method to determine the modulus of deformation for horizontal direction required in the design of steel sheet pile using the horizontal specimen by unconfined compression test was invented, and the modulus of deformation obtained from the normal test using the vertical specimen and borehole horizontal load test were compared. It was shown that a specimen with a diameter of 35 mm and a height of 63 mm can be made by utilizing the usual method of trimming out a specimen from a thin-wall sampling of soil material. From the results of the unconfined compression test using horizontal and vertical specimens, a significant difference in unconfined compression strength by the soil anisotropy was observed, but a significant difference in modulus of deformation was not observed. The modulus of deformation obtained from the borehole horizontal loading test was about 1/5 small value of the average modules of deformation obtained from the unconfined compression test using the horizontal specimen.