Lab large-scale direct shear tests are broadly adopted in engineering due to their obvious advantage, even though the test principle is slightly departure from the Mohr-Coulomb law.

• 但由于大型直剪仪自身结构及性能存在许多问题，使直剪试验及结果与其试验原理的应用条件及混合料的实际强度具有一定的偏差。