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基于莫尔-库仑破坏准则得到的边坡稳定分析,与实际结果有一定的差距;而统一强度理论,考虑了中间主应力的影响,已较广泛运用于工程实践当中,取得了较好的效果,并得到了很好的评价。因此本文利用统一强度理论,采用边坡稳定分析中使用的毕肖普法的基本假定,建立了稳定安全系数的统一表达式。利用此解可以更加合理地分析土质边坡的稳定性,并且能充分发挥材料自身的强度潜力,对实际工程具有重要意义。计算结果表明,中间主应力对边坡的稳定安全系数有较大的影响,随着中间主应力的影响增加,安全系数也相应的增加。本文对土质边坡稳定分析和工程应用有很好的参考价值。
The slope stability analysis based on the Mohr-Coulomb failure criterion shows a certain gap from the actual results. The unified strength theory, which takes into account the influence of the intermediate principal stress, has been widely used in engineering practice and achieved good results , And got a good evaluation. Therefore, by using the unified strength theory and using the basic assumptions of Bishop method used in slope stability analysis, this paper establishes a unified expression of the stability safety factor. The solution can be used to analyze the stability of soil slope more reasonably, and it can give full play to the strength potential of the material itself, which is of great significance to practical engineering. The calculation results show that the middle principal stress has a great influence on the slope safety factor, and the safety factor increases with the increase of the middle principal stress. This article has a good reference value for the stability analysis and engineering application of soil slope.