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临界滑动面搜索一直是边坡稳定性分析中十分重要的课题,由于极限平衡法具有理论简单,易于被工程师掌握的优点,因此,仍在工程应用中占主导地位。剩余推力法是国内学者提出的一种简单实用且有较高精度极限平衡法,已被纳入国家规范。针对目前剩余推力法条间力假设简单,只考虑了力的平衡而忽略力矩平衡的缺点,通过Spencer法迭代构造了严格剩余推力法边坡临界滑动面搜索优化的模型,并结合蚁群算法搜索出了最大的剩余推力相应的临界滑动面。该模型具有精度高,收敛快的特点。最后给出的两个算例与传统的蚁群算法直接搜索安全系数最小得到的结果做了比较,表明了本文方法的正确性。
Critical slip surface search has always been a very important issue in the slope stability analysis. The limit equilibrium method still occupies a dominant position in engineering applications because it has the advantages of simple theory and easy mastery by engineers. Remaining Thrust Method is a simple and practical and high precision limit equilibrium method proposed by domestic scholars and has been incorporated into national norms. In view of the simple hypothesis of the force between the remaining thrusts, only considering the balance of force and neglecting the moment balance, a model of the critical slip surface optimization of the remaining thrust method is constructed by Spencer method iteratively, and combined with ant colony algorithm The maximum remaining thrust corresponding to the critical slip surface. The model has the characteristics of high precision and fast convergence. The last two examples are compared with the results obtained by the direct search of the traditional ant colony algorithm with the lowest safety factor, which shows the correctness of the method in this paper.