Comparison of Shear Strengths of Crushed Rock Determined by Large Triaxial Test and Direct Shear Test

대형삼축압축시험 및 대형직접전단시험에 의한 사석재료의 전단강도 평가

In this study the shear strengths of a poorly grad ed rock material(d/sub max/≤50.8mm, C/sub u/=1.86) were determined by large direct shear test and large triaxial test. The obtained stress-strain curves by the above large shear tests for the rock materials are similar to the loose sand's or normally consolidated clay's curve, in which the peak strength does not appear obviously. And for the uniformly graded rock material the shear strength by large direct shear test may be overestimated around 1.54∼1.70 times that of large triaxial test.