Direct Shear Test and Apparatus
The geotechnical direct shear test is a mechanical test used to study the shear strength and deformation characteristics of soil or geosynthetics. The principle of the direct shear test is to place the sample in a shear test frame, apply two parallel horizontal forces above and below, so that the sample undergoes shear failure in a direction perpendicular to the horizontal plane, and calculate the shear strength of the sample based on the stress-strain curve obtained in the experiment.