Известия Томского политехнического университета: Инжиниринг георесурсов (Jul 2022)

ANTHROPOGENIC FACTOR IN ENHANCING LANDSLIDE ACTIVITY IN SAKHALIN REGION ON THE EXAMPLE OF A LANDSLIDES AND DESTRUCTION OF THE INFRASTRUCTURE OF A PURE WATER RESERVOIR IN SINEGORSK

  • Valeriy A. Sakharov,
  • Vladimir V. Ilin,
  • Nikolay V. Ilin,
  • Konstantin B. Strokin,
  • Denis G. Novikov

DOI
https://doi.org/10.18799/24131830/2022/7/3782
Journal volume & issue
Vol. 333, no. 7
pp. 178 – 184

Abstract

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The relevance of the study is caused by the activation of landslide processes as a result of human engineering activities, leading to the destruction of infrastructure facilities for the life support of cities and settlements in the Sakhalin Region, as exemplified by a landslide in the area of ​​the clean water reservoir in the village of Sinegorsk in July 2017. At present, the Sakhalin Region is intensively developing the slopes of mountain spurs and sections of the foothills adjacent directly to the slopes. For example, the development of the «Mountain Air» sports complex and the construction of ski slopes cover the slopes that are part of the territory of the city of Yuzhno-Sakhalinsk, and, accordingly, are in close proximity not only to infrastructure facilities, but also to residential areas of the city. Other slopes with built tracks descend into river valleys with equipped reservoirs (the Rogatka and Elanka rivers). The development of unfavorable processes in the form of landslides in these areas can lead to the formation of debris flows of catastrophic proportions, directed also to the districts of the city. Purpose: to study the conditions for the formation of a landslide, evaluate its parameters, identify the reasons for the descent and give a forecast for the development of similar catastrophic processes in the future. Object: reservoir of clean water in the village of Sinegorsk, southern slope. Methods: route reconnaissance surveys, drilling of wells up to 10 m deep with sampling every 0,3 ... 0,5 m, geophysical studies by an OKO-2 GPR installation, laboratory tests of the physical and mechanical properties of soils. Results. According to the research data, the study of the engineering-geological structure of the landslide development site in the clean water reservoir area was carried out. The parameters of the descended landslide were studied, the conditions and reasons for its formation were revealed. A retrospective assessment of the stability of the slope before the descent of a landslide and assessment of the possible development of dangerous geological processes in the studied area in the future are given.

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