METHOD OF TESTING LOOSE GROUND.

摘要

The method provides for introducing, by means of screwing-in, into the ground (2) a barrel (3) with a screw-shaped blade (4) on its end. At a depth (L3) of the ground (2, 9) which is smaller than the depth (L1) of location of the layer (1) of the ground (2) to be tested and which exceeds the pitch (t1) of the blade by a value (L4) the pressure (P3) of the ground (2) on the lower surface (7) of the blade (4) is measured and in the event that it is not equal to the pressure (P1) of the column of the ground (2) above the blade (4) in a non-deformated condition an axial force (P4) is applied to the blade (4) through the barrel (3) so as to ensure the equality of these pressures (P1, P3). When the blade (4) reaches the depth (L1) of location of the layer (1) of the ground (2) to be tested the process of screwing-in is discontinued and the barrel (3) is subjected to the influence of static forces directed downwards, the value of each subsequent force exceeding the value of the previous one by an equal value and the displacement of the barrel (3) is measured.