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边坡是一个具有明显不确定性、模糊性和时变性的系统,安全系数及可靠度理论在边坡稳定评价上各有优缺点。二元体系是基于确定性指标(安全系数)和不确定指标(可靠度)建立的边坡稳定综合评价指标体系,兼有二者的优点,具有重要的理论意义和实践价值。考虑到边坡材料指标具有区间分布及稳定边坡的安全系数不能小于其临界值的特点,对纯数学理论模型进行修正,提出了一种更加符合工程实际的边坡稳定二元评价体系,同时选取蒙特卡罗模拟法,将该二元评价体系融入GeoStudio软件,借助GeoStudio软件强大的计算能力,形成一套完整而高效的边坡稳定二元指标分析方法。采用该方法进行了降雨条件下花岗岩残坡积土边坡稳定性分析,得出了有益的结论,验证了该方法的可行和高效。
Slope is a system with obvious uncertainty, fuzziness and time-varying. The safety factor and reliability theory have their own advantages and disadvantages in slope stability assessment. Binary system is an index system of comprehensive evaluation of slope stability based on certainty index (safety factor) and uncertain index (reliability), which has both advantages and has important theoretical and practical values. Considering that the slope material index has the interval distribution and the safety factor of the stable slope can not be less than its critical value, the pure mathematical theory model is modified and a more stable binary evaluation system of slope stability is proposed. Meanwhile, Select Monte Carlo simulation method, the binary evaluation system into GeoStudio software, with GeoStudio software powerful computing power to form a complete and efficient method of slope stability binary index analysis. This method is used to analyze the slope stability of granite residual slope soil under rainy conditions, and the useful conclusions are obtained. The feasibility and efficiency of the method are verified.