ОЦІНКА СТІЙКОСТІ ДІЛЯНКИ СХИЛУ ОДЕСЬКОГО УЗБЕРЕЖЖЯ

Abstract

Currently, there is a reduction in sites convenient for the construction of facilities. In this regard, the question of the development of new territories that were previously considered unsuitable or economically unprofitable for construction is increasingly being raised. Very often it is necessary to build buildings and structures on or near slopes. The development of landslide and landslide-prone slopes requires a comprehensive study, the results of which should be used in the selection of measures for the engineering protection of territories, as well as design and construction on slopes. The main task of engineers, when performing design and survey work in landslide-prone areas, is to assess the stability of the slope and the magnitude of the landslide pressure. The article calculates the stability of the landslide-prone slope of the Odessa coast for the purpose of further construction development. The slope in question is located on the Franzysky Boulevard, in the area of the Chkalov resort. The site features are in complex engineering and geological conditions (loess soils, collapsing properties of soils, several water-bearing layers). It has been established that deep block landslides of extrusion occurred earlier in this area. After landslide control measures consisting in construction of marine cost protection and drainage structures, an increase in slope stability was observed. Despite the measures taken, there is a beach erosion with partial destruction of coast protection structures, which can lead to increased abrasion and negatively affect the stability of the entire slope. Slope stability calculations are performed in two-dimensional and three-dimensional formulation. According to the flat schemes, calculations were performed in the Slide software package using Bishop and Janbu methods. The slope stability assessment in a three-dimensional formulation was performed by the finite element method using the Midas GTS NX calculation program and consists of determining the stress-strain state of the soil mass and the stability margin factor. Based on the calculation results obtained, the slope stability is assessed and options for landslide control (retaining) structures are proposed.