To accurately simulate the mechanical properties of rockfill materials under triaxial stress using the discrete element method (DEM), the microparameters of the rockfill material DEM model are calibrated based on the macroparameters of a constitutive model. For the calibration model, a refined 3-D numerical triaxial test is established to obtain the deformation curves of the rockfill under different confining pressures. Deformation curves with different microparameters in the contact model are then calculated by numerical triaxial tests to determine the macroparameters of the constitutive model. Then, a nonlinear relationship between the macroparameters of the E-B model and the microparameters of the contact bond model is built by a relevance vector machine. A memetic algorithm is employed to calibrate the microparameters of the rockfill, thereby establishing a calibration model based on a relevance vector machine and a memetic algorithm. Afterwards, a numerical triaxial test example of rockfill materials is used to verify the feasibility of this calibration model, and then the fabric microparameters under different confining pressures are analysed. In addition, to determine the influence region, a failure process of a rockfill slope is simulated with the calibrated microparameters of the DEM model. In summary, this calibration method substantially improves the numerical results, thereby enhancing the ability to determine the mechanical properties of construction materials and solve various problems in engineering.

为了使用离散元方法（DEM）准确模拟堆石料在三轴应力下的力学性能，基于本构模型的宏观参数对堆石料DEM模型的微观参数进行了校准。对于标定模型，建立了改进的3-D数值三轴试验，以获得堆石在不同围压下的变形曲线。然后通过数值三轴试验计算接触模型中具有不同微参数的变形曲线，以确定本构模型的宏观参数。然后，利用相关向量机建立了EB模型的宏观参数与接触键模型的微观参数之间的非线性关系。采用模因算法来校准堆石场的微观参数，从而基于相关矢量机和模因算法建立校准模型。之后，以堆石料的三轴数值试验为例验证了该标定模型的可行性，然后分析了不同围压下织物的微观参数。另外，为了确定影响区域，利用DEM模型的校准微参数模拟了堆石场边坡的破坏过程。总之，该校准方法大大改善了数值结果，从而增强了确定建筑材料的机械性能并解决工程中各种问题的能力。以堆石料的三轴试验数值实例验证了该标定模型的可行性，然后分析了不同围压下织物的微观参数。另外，为了确定影响区域，利用DEM模型的校准微参数模拟了堆石场边坡的破坏过程。总之，该校准方法大大改善了数值结果，从而增强了确定建筑材料的机械性能并解决工程中各种问题的能力。以堆石料的三轴试验数值实例验证了该标定模型的可行性，然后分析了不同围压下织物的微观参数。另外，为了确定影响区域，利用DEM模型的校准微参数模拟了堆石场边坡的破坏过程。总之，该校准方法大大改善了数值结果，从而增强了确定建筑材料的机械性能并解决工程中各种问题的能力。利用DEM模型的校准微参数模拟了堆石场边坡的破坏过程。总之，该校准方法大大改善了数值结果，从而增强了确定建筑材料的机械性能并解决工程中各种问题的能力。利用DEM模型的校准微参数模拟了堆石场边坡的破坏过程。总之，该校准方法大大改善了数值结果，从而增强了确定建筑材料的机械性能并解决工程中各种问题的能力。