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抗剪强度是土的重要力学性能之一,室内剪切试验主要有直剪试验、三轴试验、无侧限抗压强度试验。实际工程中常采用较为简便的室内直剪试验来确定土体抗剪强度中内摩擦角φ和黏聚力c。试验表明,对同样性质土样进行直剪试验和三轴压缩试验得出的内摩擦角φ和黏聚力c相差较大。说明了两者之间的差异。
Shear strength is one of the important mechanical properties of soil, indoor shear tests are mainly direct shear test, triaxial test, unconfined compressive strength test. In the actual project, the simpler indoor direct shear test is often used to determine the internal friction angle φ and the cohesion c in the soil shear strength. The test shows that the difference between the internal friction angle φ and the cohesion c obtained by the direct shear test and the triaxial compression test on the same kind of soil samples is quite different. Explain the difference between the two.