策略3：过渡策略，提出的方向判断系数实现了策略1向策略2的有效过渡，使得总体计算效率和计算精度得到了有机协调。
The strategy 3 is for transition from the strategy 1 to the strategy 2: directional determination factor is created to achieve the valid transition.
采用有限元强度折减法进行边坡稳定分析，建立边坡内最大水平方向位移与折减系数尖点突变模型，并以此作为边坡是否失稳的判断标准。
A cusp catastrophe model of key points horizontal displacement and reduction coefficient is built by using the strength reduction finite element method to evaluate the slope stability.
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