다짐 화강풍화토의 비등방성 거동특성 = Anisotropic Behavior of Compacted Decomposed Granite Soils

다국어 초록 (Multilingual Abstract)

In order to investigate the strength and deformation anisotropy of compacted decomposed granite soils, a series of unsaturated-drained triaxial compression tests were performed. The sample used in the study was decomposed granite soil from Shimonoseki in Yamaguchi prefecture. The sample had three different angles of the axial (major principal) direction to the sedimentation plane (compaction plane), 0, 45 and 90 degrees. The compression strain of specimens subjected to isotropic compression was strongly influenced by the sedimentation angle. In addition, the time dependence was independent of the sedimentation angle in relation to the deformation behavior during the secondary compression process. The effect of the sedimentation angle on the triaxial compression strength and deformation was clear with low confining stress. Moreover, it was recognized that although the sedimentation angle and preparation methods were different, the dilatancy rate was relative to the increment of strength due to dilatancy. Therefore, it may be concluded that the compacted specimen has anisotropic mechanical properties similar to those of sand with initial fabric anisotropy.

참고문헌 (Reference)

1 "Vibration modulus of normally consolidated clay Journal of the SMF Div." 95 (95): 1531-1537, 1969

2 "The structure of compacted clay" 84 : 1655-, 1958

3 "The strength of compacted cohesive soils Research Conf. On the Shear Strength of Cohesive Soil" 169-273, 1960

4 "Studies on compression and strength Anisotropy of compacted soils" (3) : 113-123, 1979

5 "Strain rate effects on shear modulus and damping of normally consolidated clay" 18 (18): 365-375, 1995

6 "Single particle crushing and mechanical behavior of decomposed granite soil Proceedings of the international symposium on problematic soils" 483-497, 1998

7 "Inherent and induced anisotropy of sedimentary softrock Proc. of 10ARC" 33-36, 1995

8 "Experimental study of anisotropic shear strength of sand by plane strain test" 18 (18): 25-38, 1978

9 "Elastic wave velocities in granular soils Journal of SMF Div." 89 (89): 33-65, 1963

10 "Deformation characteristics of soils and rocks from field and laboratory tests Proc. of 9th Asian Regional Conf. on SMFE" key 2 (key 2): 101-170, 1992

11 "Anisotropic strength of compacted clay 3rd ASIAN Reg. Conf. On SMFE" 1 : 298-304, 1967