FIELD: determination of mechanical and physical properties of grounds under field conditions. SUBSTANCE: auger head is screwed into ground to depth equal to its height, additionally loaded, and break-off force is applied. Break-off force is applied by conical screw in direction coinciding with its one generating line with opening angle of 90 deg. Knowing the geometric parameters of auger head and shear strength by the results of cylindrical head testing, tensile strength is calculated. EFFECT: higher efficiency. 1 dwg
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