Random Generation and Stability Analysis of Soil Rock Mixture Slope Model
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摘要: 本文针对不同含石量的土石混合体边坡展开研究。首先，采用数字图像处理的方法，获取了自然界真实块石的数字化模型；然后，基于MATLAB 编程，采用蒙特卡洛方法随机生成特定级配与含石量的土石混合体边坡模型；接着，将模型分别导入数值计算软件FLAC2D 与OPTUM G2，并分别采用有限差分（FDM）与极限分析有限元（FELA）的方法对边坡进行计算，最后对计算结果进行了分析。研究表明：均质土体边坡的塑性区为一条类圆弧滑动带，而土石混合体边坡的滑动带沿着块石周围进行扩展；FELA 方法计算得到的边坡安全系数的平均值大于FDM 方法计算得到的安全系数的平均值。Abstract: This paper focuses on the study of the soil rock mixture slope with different rock contents . Firstly, digital image processing method is used to obtain the digital model of natural rock blocks. Then, based on MATLAB programming, Monte Carlo method is used to randomly generate the slope model of soil rock mixture with specific gradation and rock content. After that, the model is imported into the numerical calculation software FLAC2D and OPTUM G2 respectively, and the finite difference method and finite element limit analysis method are used to calculate the slope. The calculation results are analyzed and show that the plastic zone of homogeneous soil slope is a arc-like sliding zone, while the slip zone of soil-rock mixture slope extends around rocks; and that the mean value of safety factor calculated by FELA method is greater than that calculated by FDM method.
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