METHOD FOR CREATING INTRAGROUND PROTECTION OF HYDRAULIC STRUCTURES IN CRYOLITHOZONE Russian patent published in 2023 - IPC E02B3/16 E02D31/02 E02D37/00 

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to methods for eliminating leaks and increased filtration of ground hydraulic structures located in the permafrost zone, and includes, in addition to preliminary studies to determine the filtration zone, the selection of components of the grouting composition based on polymer compositions with the addition of tailings of concentration. drilling and filling of injection wells, drilling of observation wells for the subsequent control of subsoil protection, periodic geophysical surveys by near-field time-domain electromagnetic sounding (NFTDES) to determine the channels of bypass filtration and control the water saturation of soils, electrical tomography and seismic surveys to determine the location boundaries of blocks, cracks and associated channels of bypass filtration in the area of the hydraulic structure, hydrogeochemical studies to determine the properties of the rocks of the base of the dam of the hydraulic structure and the compatibility of the components of the grouting mixture, and well thermometry. Injection wells according to the method are drilled in the area of open fractures of the block along the strike of the fracture. The cement composition into wells is injected by mixing tailings supplied through side cuts in the lower part of the pre-laid slurry conduit and polymer resin supplied in a non-pressure mode directly into the wells. To study the state of the filler and subsequent control of the subsurface protection of the hydraulic structure, confirmatory wells are drilled along the route of the injection wells. As a polymer composition, Aquidur is used in the amount of 5% of the volume of the supplied grouting composition, and the ratio L:H in the enrichment tailings is 7:1.

EFFECT: reliability of operation of a hydraulic structure located in the permafrost zone, for example, a tailing dump, is increased by improving the physical and mechanical properties of the soils of the hydraulic structure dam base, and the negative impact on the environment is reduced due to a decrease in bypass filtration and the accompanying hydrogenous thawing of permafrost.

3 cl, 2 dwg