Through CT scanning, digital image processing, reverse engineering reconstruction, and 3D meshing, the numerical model of the mixed soil was established. On this basis, a numerical simulation of the triaxial testing was carried out. The movement of the 70 gravels was monitored and analyzed based on the proposed geometric feature point method (GFPM). The interaction between the gravels and soil during the triaxial testing was explained according to the spatial attitude of the gravels. The top gravels showed a dominant detachment with soil in the axial direction and an increasing detachment in the lateral direction. The gravels close to the side face of the triaxial specimen showed a dominant detachment in the lateral direction. The gravels rotated during the triaxial shearing process. The deformation of the gravel-soil interfaces near the shear zone was more significant. At the bottom of the specimen, the gravel-soil interface had no obvious deformation.

通过CT扫描，数字图像处理，逆向工程重建和3D网格划分，建立了混合土的数值模型。在此基础上，进行了三轴试验的数值模拟。根据提出的几何特征点方法（GFPM）监测并分析了70个砾石的运动。根据砾石的空间姿态，解释了三轴试验中砾石与土壤之间的相互作用。顶部砾石在轴向上显示出主要的土壤剥落，而在横向上则显示出增加的剥落。靠近三轴试样侧面的砾石在横向上显示出明显的脱离。砂砾在三轴剪切过程中旋转。剪切带附近砾石-土壤界面的变形更为显着。在标本的底部，砾石-土壤界面没有明显的变形。