RING SHEAR APPARATUS CONSIDERING WALL-SLIP EFFECT

摘要

PURPOSE: A ring shearing testing device is provided to accurately measure the shearing strength of soil because a soil sample is prevented to be slip from a wall when an upper ring and lower ring are relatively rotated by forming protrusions in the inner wall of the upper and lower rings. CONSTITUTION: A ring shearing testing device comprises an upper ring(20), a lower ring(30), a rotating device, and a shearing strength measuring sensor(60). The upper ring forms a first housing of a ring shape where a soil sample can be housed. The lower ring forming a second housing is closely adhered to the lower part of the upper ring, thereby being installed to be rotated with respect to the upper ring. The rotating device rotates the lower ring with respect to the upper ring. The shearing strength measuring sensor is joined to the upper ring, thereby measuring the shearing strength of the soil sample.