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滑坡的类型一般可分为牵引式滑坡、推移式滑坡和复合式滑坡,根据其滑面的发展形态,依次表现为前进式渐进破坏模式、后退式渐进破坏模式和复合式渐进破坏模式。基于岩土体应变软化特性,揭示了滑坡渐进破坏过程的本质是滑带力学参数弱化的过程,初步探讨了3种类型滑坡渐进破坏过程的远动特点和力学特征和滑坡渐进演化过程。以不平衡推力法和3种类型滑坡的演化特征为基础,提出3种类型滑坡渐进破坏过程中临界状态条块确定方法,通过建立滑坡渐进破坏稳定性计算模型和计算公式,提出滑坡随着渐进演化过程的滑带参数取值方法,并阐述了渐进破坏过程的稳定性计算实现过程,实现不同类型滑坡渐进破坏过程的稳定性分析。以3个典型滑坡为例,分析得出滑坡渐进破坏过程中牵引式滑坡和复合式滑坡稳定性降低速率由大到小再到大和推移式滑坡稳定性降低速率由小到大的过程,3种类型滑坡在渐进破坏过程中不同部位对稳定性的贡献不同,验证了不同类型滑坡的变形规律。研究结论可对不同类型滑坡的稳定性发展进行初步预测和为滑坡治理提供指导意义。
The types of landslide can be divided into towed landslide, sliding landslide and composite landslide. According to the development pattern of landslide, progressive progressive failure mode, progressive progressive failure mode and composite progressive failure mode are shown in turn. Based on the strain softening characteristics of rock and soil, it is revealed that the essence of the progressive failure process of landslide is the process of weakening the mechanical parameters of the landslide. The teleconnection and mechanical characteristics of the progressive destruction process of the three types of landslides and the progressive evolution of the landslide are discussed. Based on the unbalanced thrust method and the evolution characteristics of three types of landslides, three methods for determining the critical state of landslides during progressive failure are proposed. By establishing progressive failure stability calculation model and calculation formula of landslide, The method of taking the value of the sliding zone parameter in the evolution process and the stability calculation and calculation process of the asymptotic failure process are expounded and the stability analysis of the progressive failure process of the different types of landslide is realized. Taking the three typical landslides as an example, we conclude that the decreasing rates of the stability of the traction landslide and compound landslide during descending landslide are from small to large, and the decreasing rates of stability of the large and sliding landslides are from small to large. Three kinds of landslides, The types of landslides in the process of progressive failure of different parts of the contribution to the stability of different, validated the deformation of different types of landslides. The conclusion of the study can predict the stability of different types of landslides and provide guidance for landslide control.