Assembled variable dimension direct shearing compression apparatus

Abstract

The invention discloses an assembled variable dimension direct shearing compression apparatus for performing shearing test and compression test on multiple types of variable dimension rock soil samples. Each of the upper shearing box and the lower shearing box of the main body of the apparatus adopts an assembled variable dimension sample box suite consisting of at least two sets of sample box rigid components which can be connected with each other in a laminated mode, each set of sample box rigid component comprises a plurality of sample loading rings which are nested by one another, and each inner sample loading ring is axially limited by each outer sample loading ring in a single direction; the rigid components which form the upper shearing box and the lower shearing box respectively are anchored together, and one set of rigid component is arranged in each of the upper shearing box and the lower shearing box; and a rolling support matching structure is arranged on the outermost sample loading ring, water draining grooves are formed on the sample loading rings which are positioned at the bottom of the lower shearing box, and the water draining function can be closed according toa test requirement. The direct shearing test and the compression test of soil samples and soft rock, the direct shearing test of rock joints and the in-situ direct shearing test of soil bodies and the soft rock can be performed. The apparatus is easy to operation and convenient to maintain, dismount and assemble and has high environment adaptability.

Description

technical field [0001] The invention relates to a test device, which is mainly used for indoor or field direct shear compression test of rock and soil. Background technique [0002] In the field of geotechnical engineering, it is often an essential way to obtain the mechanical parameters of rock and soil in the target engineering area through experiments. At present, the strength index of rock and soil mass is obtained mainly through laboratory tests. Indoor tests include large and small triaxial tests, direct shear tests, compression tests, etc. Indoor direct shear tests include standard ring knife direct shears and large-size square box direct shears. These tests are performed on the sample under fixed sample size by shearing or compressing, and the change in sample size cannot be realized. [0003] At present, there is still a lack of instruments and equipment that can be used for direct shear tests in the field, such as the field in-situ direct shear instrument that u...

AI Technical Summary

Problems solved by technology

These tests are performed on the sample under fixed sample size by shearing or compressing, and the change in sample size cannot be realized.

[0003] At present, there is still a lack of instruments and equipment that can be used for direct shear tests in the field, such as the field in-situ direct shear instrument that uses the principle of leverage. The vertical pressure is applied by weights, and the horizontal thrust is applied by manpower. Small, especially lack of instruments and equipment with the function of combined shearing and compression of soil samples with variable dimensions, and can also perform shearing and compression tests of soft rocks

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