ИСТИНА

Thawing of frozen soils due to global climate change or violation of the rules of operation of structures built according to the first principle poses the task of finding new geotechnical solutions to ensure or restore bearing capacity. In recent decades, the main method for stabilizing and preserving frozen soils in the design temperature regime has been the use of thermal stabilizers. But as the practice of constructing and operating engineering structures on permafrost soils shows, this method, having the temporary inertia of setting the required temperature regime, cannot always quickly solve the problem of ensuring bearing capacity in short periods of time. This is what happened with the building of the historical and cultural heritage of the Palace of Culture in Norilsk (Russia). An inspection of this structure showed its pre-emergency condition. Prompt measures were required to restore the load-bearing capacity of the building's foundation. The task of restoring the bearing capacity of the foundation of building structures in the zone of thawing soils has additional limitations - when developing strengthening technology, the following factors must be taken into account: heat generation - when performing work in the zone of permafrost soils, it is necessary to strictly limit additional heating of the soil; heat transfer – the use of methods and technologies that increase the heat transfer of the base to the permafrost soil is not allowed. To solve this problem, it was proposed to use modern technology for strengthening thawing soils using controlled hydraulic fracturing - ThawingJET® based on a special expanding polymer composition.