METHOD TO TAKE SAMPLE BLOCKS OF MINERAL SOILS Russian patent published in 2012 - IPC E02B11/00 E02D1/04 

FIELD: construction.

SUBSTANCE: method provides for taking sample blocks by a cylinder-sample block picker with the inner diameter D and the height H, with thickness of its wall h and angle of sharpening of its external cutting edge U°. In soils enriched with a rock material, sample blocks are taken with a cutting cylinder-sample block picker with D=180…220 mm, H=D, h=3…4 mm and U=40…45°. In soils with cracks, galleries of shrews, worms and root tubes of plants with D=180…220 mm, H=(0.8…1.0)D, h=1.5…3.0 mm and U=25…30°. In soils with less developed cracks and single root tubes of plants with D=130…180 mm, H=(0.8…1.0)D, h=1.5…3.0 mm and U=25…30°. In soils without cracks and other secondary pores, practically with no coarse soil with D=75…130 mm, H=(0.8…1.0)D, h=1.5…2.0 mm and U=25…30°. When developing a calculation method to determine a filtration ratio, with D=180…220 mm, H=(0.8…1.0)D, h=1.5…3.0 mm and U=25…30°. In all instances D does not exceed the capacity of a genetic horizon or a layer, from where a sample block is taken.

EFFECT: elimination of gross errors to determine a filtration ratio and water-physical properties of reclaimed soils and higher efficiency of mineral soils drainage.