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 within the limits of frosting-defrosting soil layer depth when steady-state negative temperatures of ambient air appears; providing freezing speed exceeding speed of moisture transference to freezing front; cooling-down freezing soil area up to temperature of -3 - -5^o C; maintaining the soil frozen condition up to approach of positive daily mean ambient air temperature. EFFECT: simplified technology, increased productivity, reduced labor consumption and cost, increased efficiency and reliability. 4 cl, 1 ex