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基于大坝变形失稳的简化力学模型，考虑裂隙的非线性应变软化和渗水软化，根据突变理论推导了大坝变形失稳的尖点突变模型，并利用该模型对大坝变形失稳的机理和力学条件进行了分析，从整体上深化了对大坝变形失稳机制的认识。
Based on the simplified mechanical model of the dam deformation instability and considering the nonlinear strain softening and seepage softening of the crack, the cusp catastrophe model of the dam deformation instability is deduced according to the catastrophe theory. The model is applied to the dam deformation instability mechanism And mechanical conditions were analyzed, deepening the understanding of the dam instability mechanism as a whole.