Abstract
The peculiarities of soil state and strength and its role as a “weak” layer in the groundmass are often represented as the main factor that determines the occurrence of a landslide or its activation. These concepts are usually extended both to shallow shear landslides and liquefaction-flow types, as well as to deep block landslides, such as compression-extrusion type, with the release of so-called “the main deformable horizon” of soils in the latter. The formation of a new landslide block is accompanied by the occurrence of destructive displacements in the landslide cirque, involving in displacements of the whole slope. Such events are common in urbanized areas, on slopes with the development of deep compression-extrusion landslides. This article discusses the mechanism of formation of a landslide block and the geological features of transformation of the stress-strain state of the ground mass. New data on the behavior of soils at various stages of dissipation are presented, including the case when the dissipative geological structure is separated from the bedrock in the form of a landslide block.
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