Assessment of Stability of the Area Near Sinkholes in the Village of Berezniki, Gaginskiy District

The article provides with the results of a comprehensive assessment of the stability of the area near the karst sinkholes at Berezniki, Gaginsky district. The materials of geophysical surveys obtained by the method of vertical electric sounding were interpreted taking into account the karstological drilling data. Weakened zones are outlined along the apparent resistivity sections. Dependence of sounding results on the distance from the nearest sinkhole was analyzed. The intensity of sinkhole formation and the average diameter of the karst sinkhole were calculated

Meadows of the Crimean Yaila

A comparative analysis of the vegetation composition in the meadow steppe community and the meadow in the middle in a karst sinkhole was made. The appearance of the meadow, which is formed by its coenogenous elements, is contrasted with the steppe. The compositions of the elements in two neighboring coenoses are also not similar. Obviously, the examined communities have different genesis. These differences are due to environmental conditions of karst depression. Yaila meadows are here indigenous primary vegetation of azonal origin.

Assessment of karst hazard in engineering surveys: a review of Russian regulatory technical documents

Engineering surveys are a required part of the construction activity in accordance with the Urban Planning Code of the Russian Federation No. 190-FZ of December 29, 2004 and the Technical Regulations on the Safety of Buildings and Structures No. 384-ФЗ of December 30, 2009.The analysis of domestic regulatory technical documents containing the terms, requirements for the composition, volume and methods of studying hazardous territories is presented. Requirements for engineering surveys in karst development areas are most fully set out in SP 11-105-97 (Part II); TCH 302-50-95 RB; TSN 22-308-98 NN; TSN 11-301-2004Po, which are currently not valid. Issues of terminology are considered, problems in determining the normative indicators (sinkhole formation intensity and average diameter of karst sinkhole) are covered during the karst hazard assessment, in accordance with SP 11-105-97 (Part II). It is noted that it is necessary to make changes to a number of regulatory technical documents to eliminate contradictions and inconsistencies, especially in SP 22.13330.2016 "SNiP 2.02.01-83* Foundations of buildings and structures", SP 116.13330.2012 "SNiP 22-02-2003 Engineering Protection of Territories, buildings and structures from hazardous geological processes. Fundamental principles". The need to develop a new set of rules for the implementation of engineering surveys for construction on karst territories, in which it is supposed to take into account regional features of engineering surveys, is shown. It is proposed to take SP 11-105-97 (Part II) as a basis, in which the composition and volume of engineering and geological surveys are described in most detail and have not lost their relevance to the present.