Current stability evaluation methods are unable to consider the progressive developing process of the bulking landslide and lack progressive evaluation method. Based on the strain-softening constitutive model and energy conservation theory, this study proposes a progressive evaluation method for buckling landslide stability considering the shear mechanical characteristics of the slip zone with large displacement, enabling progressive evaluation of landslide stability as the buckling landslide deforms. Proposed method was validated based on the good agreement between evaluation result and observation from the critical displacement of Baiyangou landslide in the Three Gorges Reservoir area in China, as a case study. The results also suggest a displacement distribution along the slip zone presenting a two-step growth feature from the front edge to rear edge; in contrast, the shear strength distribution presents a two-step decline feature. In addition, the parameter sensitivity analysis of slip zone and slide mass of buckling landslide shows that buckling landslide stability is directly proportional to the thickness of slip zone and elastic modulus of slide mass and inversely proportional to the length of slide mass.

中文翻译：

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考虑滑移带应变软化行为的屈曲滑坡稳定性渐进评价

目前的稳定性评价方法无法考虑膨体滑坡的渐进发展过程，缺乏渐进评价方法。本研究基于应变软化本构模型和能量守恒理论，提出了一种考虑大位移滑移带剪切力学特性的屈曲滑坡稳定性渐进式评价方法，实现了屈曲滑坡变形过程中滑坡稳定性的渐进式评价。以我国三峡库区白岩沟滑坡临界位移评价结果与观测结果吻合较好的情况为例，对所提方法进行了验证。结果还表明，沿滑移带的位移分布呈现出从前缘到后缘的两步增长特征；相比之下，抗剪强度分布呈现两步递减特征。此外，屈曲滑坡滑带和滑体参数敏感性分析表明，屈曲滑坡稳定性与滑带厚度和滑体弹性模量成正比，与滑体长度成反比。