INSTRUMENTAL OBSERVATIONS OF DEFORMATIONS OF A BUILDING IN THE AREA OF INFLUENCE OF OLD MINING WORKS

Abstract

The object of the study is a three-story building built in 2011 on the territory that used to be mined by the underground works at the beginning of the 20th century. Special soil studies were carried out before the construction of the building in 2011, which made it possible to conclude that the development of the land plot is safe. However, the constructed building is being constantly deformed, cracks form in the walls with an opening of up to several millimeters, and soil subsidence periodically occurs in the area around the building.
The purpose of the work is to establish the cause of the deformation of the building and assess the safety of the operation of the social facility.
Research methods: geodetic instrumental observations of displacements of wall benchmarks using leveling of the 3rd class of accuracy, analysis of mining and geological materials, visual observations of building deformations.
The analysis concluded that there is a whole range of factors affecting the deformation of the building, namely: the lithological diversity of loams and clays with different physical and mechanical properties, the likely presence of remaining voids and areas of decompaction due to the influence of mining, structural shortcomings of the building itself.