Development and evolution of landslides formed in Neogene clay

Abstract

The main schemes and models of landslide processes in Chernivtsi region of Ukraine in the soils composed mainly of Neogene age clay have been identified. Three main schemes and corresponding models of sliding process development mechanisms ("slip", "flow", "cut") can be distinguished within the territory of the Chernivtsi region Polevetskyy (2009). Mathematical modelling of the Neogene clay slope cut" slide slip surface formation mechanism has been performed. Stability index is changing from 1.31 to 0.92 depending on the length of formed slip surface. Accordingly, the physical-mechanical characteristics of the slopes soil are decreased and the value of the landslide pressure is increased in the course of the cycle development. Slope engineering protection is carried out at one of the stages of this sequence, which accordingly increases the period of the cycle of landslides development. It should be noted that the existing methods of engineering geological surveys cannot at this time clearly determine whether the slide surface was completely formed for cut slides, or to fix their manifestations. Since the slopes of the area, as a rule, are already complicated by flow or slip slides. In order to prevent cut"slopes manifestations it is very important to identify sites on the slope surface where there is formed slip surface and to take appropriate actions for their stabilization.In order to prevent cut" slopes manifestations it is very important to identify sites on the slope surface where there is formed slip surface and to take appropriate actions for their stabilization.