DETERMINATION OF THE STABILITY OF ROCK-FALL SITES ON THE MUGULE-MUKUNGA STRETCH OF THE FAR EASTERN RAILWAY

• Published in: Bulletin of the Tomsk Polytechnic University Geo Assets Engineering
• Main Authors: Aleksandr V. Sakharovskiy, Lyudmila A. Strokova
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Tomsk Polytechnic University 2022
• Subjects: engineering and geological conditions; regional factors; soil; landslide; slope stability assessment; simulation model; Engineering geology. Rock mechanics. Soil mechanics. Underground construction; TA703-712; permafrost
• Online Access: https://doi.org/10.18799/24131830/2022/11/3702; https://doaj.org/article/0efb5e5d2cd24411b2fe68f6d68bf58d

The relevance of studying gravitational processes lies in the fact that they lead to emergencies with the threat of destruction of structures, land use, and human safety. The question of a reliable quantitative forecast of their stability causes particular difficulties in the study of rock-collapse slopes. This study aims to assess the engineering-geological and hydrogeological conditions of dangerous slopes and calculate their stability. The object of the study is the geological environment of the railway route area. The main factors influencing the development of gravitational processes, geomorphological and tectonic conditions; lithological composition; physical and mechanical properties of rocks, permafrost, hydrological and hydrogeological conditions of the area are considered. Methods: brief review of the relevant literature; analysis of engineering and geological survey data; calculations of slope stability. The results. We considered the characteristics of the main factors of the landslide process of this territory, the results of calculating the stability of slopes along dangerous sections by various methods. We carried out the stability calculations; according to them the considered rock slopes in a static state and in a design seismic situation are stable across all sections. According to the results of the survey with the conducted measurements of fracturing at the reference sites, the estimated capacity of the potential capture of rock blocks, with the possible occurrence of collapses, is 2,0 m. It was determined in the field by measuring the degree of fracturing of the array. Summary. The main causes of deformations are: the steepness and aspect of the slopes, weakly lithified Jurassic sandstones composing the entire slope, and the nature of their fracturing, cutting of steep slopes in the lower part of the road. We proposed the measures to protect railway tracks.