SYSTEM OF SOILS FREEZING Russian patent published in 2011 - IPC E02D3/115 

FIELD: construction.

SUBSTANCE: system of soils freezing comprises wells drilled equidistantly along the contour of a mine or a pit. Freezing columns are lowered into wells, and they contain feeding pipes, and brine cooled at a freezing station circulates in the columns. The system of soils freezing also comprises headers that connect the outlet of the freezing columns with the freezing station. The brine is the solution of calcium chloride salt. The brine is cooled at freezing stations with refrigerating machines. Freezing columns are made of titanium-nickel alloy with shape memory effect and initially have tubular cylindrical shape with longitudinal corrugation. Alloy of freezing columns is given phase conversion at critical temperature into cylindrical shape. The system of soil freezing differs from the prototype by improved design of a freezing column, providing for increased resource of freezing columns at cyclic variation of soil temperatures.

EFFECT: increased reliability and efficiency of soil freezing system operation due to usage of deformations that occur in tubular column design made of alloy with shape memory effect with expanded volume of ice and soil barrier.

2 dwg