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根据土体温度的截然不同,多年冻土区的斜坡稳定性可以简单地划分为正冻土斜坡稳定性和正融土斜坡稳定性两大类。正冻土斜坡的变形以蠕变为主,基于蠕变,文中介绍了坡体不同深度处变形速率的计算方法。正融土斜坡变形与失稳兼顾了蠕变、滑动、坍塌和倾倒等几种变形与破坏,其中地下冰的融化在斜坡失稳中起到了十分重要的作用。基于典型热融滑塌型斜坡失稳,针对不同的渗流条件建立了其稳定性评价方法。
According to the difference of soil temperature, the slope stability in permafrost regions can be divided into two categories: the slope stability of positive frozen soil and the stability of positive thawing slope. The deformation of the positive frozen slope is mainly creep, and based on the creep, the calculation method of the deformation rate at different depths of the slope is introduced. The deformation and instability of the positive thawing slope take into account the deformation and failure such as creep, sliding, collapse and pouring. The melting of the underground ice plays a very important role in the slope instability. Based on the typical thermal-slump-type slope instability, the stability evaluation method is established for different seepage conditions.