CALCULATION OF STABILITY OF SLOPES OF THE ODESSA COAST

Abstract

There are a huge number of landslide slopes on the Black Sea coast, particularly in Odesa region. Almost the entire undeveloped part of the coast is slopes where landslides have occurred or are occurring. Most landslides are caused by the geological structure of the soil. The types of coastal landslides are shear and rotation landslides and slip landslides. Most landslides are active. The most obvious traces of landslide processes are seen in the popular suburban villages of Kryzhanivka, Dofinivka, Sanzheika, and Simon. Recently, some experts have expressed the opinion that there cannot be any pronounced sliding surface. During a landslide, soil layers are deeply affected by deformations, the magnitude of which continuously decreases as they move away from the soil surface. These collapses of masses of soil without fixing sliding surfaces can occur only when the soil is visco-plastic. The landslides are caused by development without a groundwater drainage system, negligence of bank protection and chaotic construction without bank protection systems. Previously, mainly lightweight wooden structures were allowed to be built in such landslideprone areas. Now the entire coast has become a zone of heavy cottage construction. Gullies like the one in Chornomorsk are filled in, and there are no water drainage systems in place. But they served as buffer areas for water accumulation during heavy rains and heavy rainfall. Also, intensive construction on the shore changed the course of the river, and the lack of bank protection structures led to the fact that in the new situation the bank was defenceless The nature of soil deformations that occur during the collapse of earth masses depends heavily on the properties of the soil. It is impossible to create a calculation model that could reflect the wide variety of soil properties found in nature.