GROUND DAM IN THE PERMAFROST ZONE FREEZING SYSTEM AND DAM WITH ITS APPLICATION Russian patent published in 2018 - IPC E02B7/06 

FIELD: construction.

SUBSTANCE: invention relates to the field of hydraulic engineering construction, namely, to the structures operation under conditions of the northern construction and climatic zone. Ground dam freezing system in the permafrost zone on the permafrost base 1 contains the anti-filtration core 2 with built-in freezing columns 8, configured to pass the liquid cooling medium through the columns. As cooling medium (heat carrier), the natural (genuine) brine is used. Into the freezing system 8 the brines are supplied from the brine storage 15 by means of pump 10 via the brine supply pipeline 11 and the spent brines are taken back to the brine storage 15 via the brine outflow pipeline 12. Brine take-up unit can be designed in the form of telescopic pipe. As minimum, the brine take-up unit 9 can be located at a distance from the brine storage 15 bed bottom, which prevents solids ingress into the brine take-up unit 9. Anti-filtration core 2 of the dam can be backfilled from the soil (for example, loam), moistened with fresh water until the full moisture capacity state. Dam may contain the upper 4 and the lower 5 thrust prisms from the dispersed soil or rock filling, transition zones 6 and 7 from sand, from the upstream side in the transition zone, the anti-filtration geosynthetic salt shield 3 is established, which transits into the blanket. Year-round stability and reliability are achieved by using the natural year-round refrigerating machine, formed in the brine storage, and using the anti-filtration core from the soil moistened with fresh water to the full moisture capacity state, which provides year-round stability of the core. Invention can be applied during the dams in the permafrost zone construction.

EFFECT: increase in operation reliability and stability; obtaining the possibility of brines storing in the bounded by a dam water reservoir is provided by the anti-filtration geosynthetic salts protection screen, which transits into the blanket, providing the containing fresh ice dam core insulation.

5 cl, 1 dwg