屈服接近度在边坡失稳概率等级评价中的应用

The Application of Yield Approach Index in Probability Level Evaluation of Slope Instability

首先介绍了边坡失稳概率等级判定准则,总结并分析了概率等级的常用判定方法以及它们的优缺点。其次,结合具体分析实例,针对目前常用的概率等级判定方法所存在的不足,将屈服接近度应用到边坡失稳概率等级评价中,并将分析结果与安全系数法和蒙特卡洛法所得结果进行了对比分析。结果表明:与安全系数法相比,基于屈服接近度的概率等级判定法能为概率等级的判定提供更为准确的依据,同时也可以为制定具体的边坡失稳控制措施提供依据,而与蒙特卡洛分析法相比,它具有耗时短、效率高的特点。本文研究为类似工程的分析提供了新的角度,具有一定的参考价值。

Firstly, it introduces probability judgment criteria of slope instability. Common methods for determi- ning the level of probability are summarized and their advantages and disadvantages are analyzed further. Secondly, in order to overcome the shortcomings of the common methods mentioned above, a method based on yield approach in- dex is proposed and shown with specific examples, and the results got by the proposed method, method based on safe- ty factor and Monte Carlo are compared. The results showed that： compared with the method based on safety factor, the proposed method could supply us with more reliable basis to determine the level of slope instability probability and reference for proposing specific control measures to prevent landslide; compared with Monte Carlo analysis method, it has characteristics of short time-consuming and high efficiency. The research with some reference and academic value provides a new perspective for similar projects.