ABSTRACT
The article studies and analyses characteristic geotechnical, hydrogeological, and climatic conditions of the mountain cluster at Krasnaya Polyana settlement. The authors carried out the analysis of changes in the slope moisture content due to precipitation infiltration into the soil (based on the results of repeated sampling of soil monolith) after cutting the surface confining layers represented by the soil and vegetation layer and silt-clay soil. The mechanical characteristics of coarse clastic soils with clay fillers and silt-clay soils containing large inclusions are determined according to the DalNIIS method, depending on the moisture content of the filler (fraction Ø < 2 mm). The influence of wetting of coarse clastic soils with clay fillers on the design stability coefficient of the natural slope is estimated by the method of strength reducing in Plaxis 2D program. The existing regulatory document that settles the minimum standardized stability coefficient margin [kst ] – SP 116.13330.2012 “Engineering protection of territories, buildings and structures from dangerous geological processes” – was reviewed and analyzed. To assess the impact of soil wetting on the stability of cut slopes, taking into account changes in moisture content (due to precipitation infiltration), the design stability coefficients and theoretical sliding surfaces were determined in Plaxis 2D program, and a comparative analysis was performed with the results of field observations such as photographic recording of the slopes under consideration. The results of the study showed the need to take into account the effects of soil wetting for slopes composed of coarse clastic soils with clay fillers as a separate load factor in a subtropical climate.
