METHOD FOR PRODUCING A CLAY SOIL PILE Russian patent published in 2022 - IPC E02D5/46 

FIELD: fixed construction.

SUBSTANCE: invention relates to the field of environmental protection, in particular, to creation of anti-filtration curtains in soil masses for the purpose of localising and preventing the migration of polluting substances from buried, underground, and aboveground sites of accumulation (pools, barns, storages, tanks, containers, hoppers, landfills, buildings, and structures) and disposal of waste of various classes. The technical result is achieved due to the application of natural mineral components, e.g., bentonite and/or other clay, as an insulating agent, thereby filling the voids of the processed soil with a gel-like structure. Said technical result is also achieved due to the flexible approach to the formulation of the drilling mud during drilling prior to the actual injection. The substance of the approach consists in the fact that process water is used as drilling mud during construction of clay soil piles in conditions of drilling in dense, water-free soils. Drilling mud based on a mixture of a base solution of a binder composition with process water with a base composition:water ratio from 1:0 to 1:0.5, respectively, is used during construction of clay soil piles in loose watered soils. The drilling mud based on a basic solution of a binder composition therein performs the function of primary edging of the ground water from the pore space during drilling in order to improve the uniformity of the gel-like structure of the clay coil pile as a result of injection. Active absorption of the ground water by the material of the clay soil pile occurs according to the crystalline and osmotic mechanisms of swelling due to the presence of a highly colloidal component in the composition. The binding of the absorbed water due to the electrostatic forces by the components of the mixture leads to a reduction in the permeability coefficient. Application of highly plastic clay materials provides a high sorption capacity of the clay soil pile in relation to the main radionuclides and heavy metals.

EFFECT: increase in the durability of the waterproofing screen due to the structure of the elements of the screen (clay soil piles) not subjected to the impact of vibration loads without "cold" junction seams.

3 cl, 3 dwg