以某水电站坝址左岸堆积体为例，采用室内土工试验中大剪试验和三轴试验 2 种试验方法，测得碎石土的抗剪强度参数并进行对比分析。试验结果表明，三轴试验比大剪试验测得的碎石土抗剪强度参数值更真实、准确。并进一步提出 2 种试验结果的适用条件：大剪试验中的快剪适用于渗透系数小、受荷速度快的高塑性粘土，各向异性且剪破面未知的土体不宜采用快剪，对于渗透性较强的粗粒土 , 快剪的结果较三轴试验差异较大；三轴试验中的不固结不排水试验适合于一般粘性土、砂类土，但特易扰动土除外 , 其试验结果较接近实际。

 With a stack body of some hydroelectric power station left bank as an example,in order to obtain rubble anti-hear intensity parameters, the results of the direct shear test and triaxial compression test were compared and analyzed. Experimental results show that: the rubble anti-hear intensity parameters measured by the triaxial compression test are more true and accurate and the applicable conditions of the two test results are also expounded; fast-hear test is fit for a high-peed plastic clay which has a smaller permeability coefficient and is to be loaded fast, but it is not fit for the soil which possesses anisotropy and unknown shear-reaking surface,in addition, in comparison with triaxial compression test,the results of fast-hear test are quite different for coarse-rained soil which possesses stronger permeability; the non-onsolidated and undrained shear test is suit for general clay and sand soil, except soil disturbed easily, and the test results are closer to the real.