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为圆弧形（干和湿边坡）和楔形（干边坡）边被破坏直接估计安全系数，提出了简单、新颖的经验公式。估计边坡安全系数的这些新公式是采用统计学最大似然估计方法获得的。收集了23个干边坡（破坏13，稳定10）和23个温边坡（破坏16，稳定7）圆弧形破坏实例，以及14个干边坡（破坏8，稳定6）楔形破坏实例数据。可以看出，采用新公式预测的安全系数与采用极限平衡方法计算的安全系数颇为一致。
A simple and novel empirical formula is put forward to directly estimate the safety factor for arc-shaped (dry and wet slopes) and wedge-shaped (dry slopes) sides. These new formulas for estimating slope safety factors are obtained using the statistical maximum likelihood estimation method. Examples of circular arc failure of 23 dry slopes (V13, V10) and 23 warm slopes (V16, V7) and wedge fracture data of 14 dry slopes (V8, V6) were collected . It can be seen that the safety factor predicted by the new formula is quite consistent with the safety factor calculated by the limit equilibrium method.