ABSTRACT
Histories from earthquake disasters worldwide have reported to civil infrastructures that sever large deformations, and liquefaction can occur in embankments, traffic road basements, and residential land, which are constructed in unsaturated soils with matric suction. Japan has often received large damage induced by huge earthquake such as the Great Hanshin Awaji Earth-quake and Great East Japan Earthquake. Prediction of the liquefaction potential cyclic strain accumulation characteristics for full-saturated soils and saturated sandy soils are advantage com-parison to full saturated soils. This study conducted out-measure cyclic triaxial tests on unsaturated soil and clear saturated soil subjected to seepage using the microporous membrane technique. The specimens were applied to the matric suction of 10 kPa. Variations in the cyclic stress ratio were applied to the specimen, and the pore water pressures were measured through a cyclic loading test. Finally, the relationship between the cyclic stress ratio and the number of cycles was verified, and saturation application induced a reduction in the cyclic loading resistance.
