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采用PFC2D程序对泥岩-土混合料试样的室内直剪试验进行了仿真模拟,将模拟结果与室内试验结果进行了比较,得出PFC2D方法可以较好地模拟出这种特殊的散体材料的直剪特性。通过改变PFC2D颗粒的细观参数得到泥岩-土混合料试样的不同直剪强度,其结果对于研究这种特殊路基填料的力学特性以及采用仿真模拟取代室内常规直剪试验有一定的应用价值。
PFC2D program was used to simulate the indoor direct shear test of mudstone-soil mixture samples. The simulation results were compared with the indoor test results. The results show that the PFC2D method can simulate this special kind of dispersion material Direct shear characteristics. By changing the mesoscopic parameters of PFC2D particles, the different direct shear strength of mudstone-soil mixture samples is obtained. The results have certain application value for studying the mechanical properties of this special subgrade filler and using simulation to replace the conventional direct shear tests in the laboratory.