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结合山西天桥水电站除险加固工程中的土石围堰的边坡,提出了采用安全系数和失效概率来综合评价其安全性。采用工程上常用的瑞典条分法建立极限状态方程,考虑土体内摩擦角、粘聚力为随机变量,利用蒙特卡罗法求解边坡的可靠度指标,并对边坡稳定性分析中最重要的评价指标安全系数与可靠指标的关系进行了探讨。结果表明,采用安全系数和可靠概率综合评价土石围堰边坡的稳定性能更好地了解工程的实际安全状况。该方法为土石围堰边坡的安全性评价提供了一种参考。
Combining with the slope of earth-rock cofferdam in the project of reinforcement and reinforcement of Shanxi Tianqiao Hydropower Station, the safety factor and failure probability are proposed to comprehensively evaluate the safety. The equation of state of state is established by the commonly used Swedish piecewise method. The internal friction angle and cohesion are considered as random variables, and the reliability index of slope is calculated by Monte-Carlo method. The most important factor in slope stability analysis The relationship between the safety index and the reliability index of the evaluation index was discussed. The results show that the comprehensive evaluation of the stability of rocky cofferdam slope with safety factor and reliable probability can better understand the actual safety status of the project. The method provides a reference for the safety evaluation of rockfill cofferdam slope.