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小型崩塌是低丘缓坡地区,特别是低丘缓坡开发利用中常见的一类地质灾害。本论文采用DDA方法对小型崩塌问题进行数值模拟和分析。模拟中通过增加重力的方法使得坡体逐渐破坏失稳;针对不同的岩土体类型进行不同的单元(块体)划分,并根据需要考虑岩土体的开裂形式破坏。研究对某真实坡体的小型崩塌过程进行了模拟预测和分析。研究表明DDA方法是模拟小型崩塌破坏的有效方法,可以在该类问题的分析中得到广泛应用。
Small-scale collapse is a kind of geological disasters that are common in the hilly gentle slope area, especially in the development and utilization of low hillside gentle slope. This thesis uses DDA method to simulate and analyze the small-scale collapse problem. In the simulation, the slope body is gradually destabilized by increasing the gravity method. Different unit (block) divisions are made for different types of rock and soil mass, and the cracking of the soil body is considered as necessary. The study simulated and predicted the small collapse process of a real slope. The research shows that DDA method is an effective method to simulate the collapse of small-scale collapse and can be widely used in the analysis of such problems.