METHOD FOR EVALUATION OF EXTENT OF CLAY SOILS REPACKING IN NATURAL DEPOSIT Russian patent published in 2010 - IPC E02B1/02 G01N33/24 

FIELD: construction.

SUBSTANCE: in method samples of soil are picked, density and humidity are determined in natural condition, as well as density of soil particles, overburden pressure at the depth of sample picking and preconsolidation pressure. Additionally humidity is determined at liquid limit, as well as size composition, content and density of particles of fine, with size of less than 2 mm, and coarse, with size of more than 2 mm, fractions, steady-state density of sample. Balance pressure for overburden density of picked soil sample is defined according to the formula: coefficient of repacking is determined by ratio of picked sample density and balance density for overburden pressure: coefficient of tension by ratio of balance and overburden pressures: and then, having obtained values of these coefficients, extent of sample repacking is defined.

EFFECT: increased efficiency and accuracy, reduced labour intensiveness and duration of balance pressure determination, wider interval of pressure values and preconsolidation properties.

3 cl, 4 dwg, 2 tbl, 2 ex