Development of several scenarios for the landslide slope digital transformation

The object of research is a section of a soil slope, prone mainly to landslides and partially to landslides, on the edge and at the foot of which administrative buildings are located. The landslide limited the full operation of the buildings, and further deformations of the landslide massif could threaten their destruction. The research aim is the applied methods development for surveying the technical state of the site and landslide prevention structures that underwent a soil accident, accident causes identification and options development for the site further stabilization and reconstruction depending on its intended use in the future. The landslide phenomena that led to a soil accident in the dense development conditions of the city of Kyiv were visually inspected. The physical and mechanical characteristics of soils composing the landslide slope, groundwater regime and other features of the site with landslide soils, as well as the landslide protection structures and drainage system state in the landslide lower part were determined. The scenario analysis based on the mathematical numerical modeling and PLAXIS software package was used to build the digital model of the landslide disaster site and identify the causes that led to the disaster. The scenario analysis combined with the mathematical numerical modeling was used to assess the possible options for stabilizing and reconstructing the soil accident site depending on its further intended use. The stabilization of the landslide slope was achieved through the use of engineering measures: removal of landslide masses, arrangement of additional retaining walls using soil anchors, terraced slope and installation of gabions, arrangement of drainage systems. The qualitative effectiveness of the results obtained by the author is based on a scenario analysis to consider from the unified positions of modern experimental and computational capabilities of soil mechanics the elimination of a soil accident, which can lead to many human losses and economic losses in further development. The main options and sequence of actions for its elimination are analyzed. The quantitative effectiveness of the proposed measures is proven by the reduction of landslide hazard, which is contained in the generally accepted in the world indicator of the coefficient of stability of a landslide-prone soil area. And, as a result, this indicator meets the regulatory requirements of Ukrainian construction standards, which confirms the effectiveness of approaches and methods for eliminating a complex soil accident. The slope stability coefficient kst was increased from 0.989…0.991 to 1.474…1.88, which exceeds the regulatory value of 1.2. Based on the research, project documentation for stabilizing the landslide slope was developed, engineering preparation of the territory was carried out, which included the installation of retaining walls with soil anchors and terracing of the slope. Construction work on the arrangement of the underground part of the building has begun