为研究植被根系对边坡稳定和水土保持的作用,该文通过根土复合体的三轴实验分析了根对土体的加强作用,得到了含根体积比为0.5%和1%的根土复合体在10 kPa围压下的轴压极限载荷。同时使用基于周期性复合材料的均匀化理论,建立了根土复合材料胞元的数值计算模型。利用该模型,对两种含根体积比情况下的轴压极限载荷进行了数值计算,其结果和实验比较吻合。该文实验在青海进行,研究结果为将来治理青海水土保持问题提供了数据基础。 In order to study the effect of vegetation root on the slope stability and water and soil conservation, this paper analyzed the strengthening effect of root on soil by triaxial experiment of root complex, and obtained the root soil with root volume ratio of 0.5% and 1% Axial Compressive Load of Composites under Confining Pressure of 10 kPa. At the same time, using the theory of homogenization based on periodic composite materials, a numerical calculation model of cell composite is established. The model was used to calculate the ultimate axial compressive loads of two kinds of specimens with different root volume ratios. The results are in good agreement with the experimental ones. The experiment is carried out in Qinghai. The results provide the data basis for the future control of soil and water conservation in Qinghai.