METHOD OF FOUNDATION PROTECTION AGAINST FROST HEAVES IN SOIL Russian patent published in 2004 - IPC

FIELD: building, particularly protective arrangements for foundations or foundation structures against frost heaves in seasonal freezing soil. SUBSTANCE: method for foundation protection by freezing control of soil around foundation involves induced local freezing of soil surrounding foundation with depth equal to frosting-defrosting soil layer depth and width equal to two foundation widths when temperatures of ambient air becomes equal to from -2 to - 4 C in the daytime; providing soil freezing in upward direction from layer lower boundary up to temperature mot more than -6 C; maintaining the soil frozen condition up to positive mean daily temperature of ambient air approach. EFFECT: simplified technology, increased speed, reduced labor consumption and cost, increased efficiency and reliability. 4 cl, 1 ex