FIELD: determining physical-mechanical properties of soils in the field. SUBSTANCE: method involves screwing a screw-blade conical point into ground to a depth equal to its height, ballasting it, applying a breakaway force and determining resistance to shear and tension. Breakaway force is applied to screw-blade point in the direction opposite to generating line with a cone-opening angle from 0 to 90 deg. EFFECT: higher accuracy of test results achieved by producing clearly-defined surfaces characteristic of such deformations of soil. 3 dwg
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