Assembled size-changeable double-face shear apparatus

Abstract

The invention discloses an assembled size-changeable double-face shear apparatus for performing a direct shear test on various size-changeable rock test samples. An upper shear box, a lower shear box and a middle shear layer are assembled size-changeable test sample box sleeve pieces consisting of stacked test sample box rigid components; each test sample rigid component comprises a plurality of embedded sample accommodating rings; the inner side sample accommodating rings is axially limited by the outer side sample accommodating rings in one direction; the rigid components forming the upper shear box and the lower shear box respectively are anchored together; rolling supporting matched structures are arranged on the outmost side sample accommodating rings of the rigid components in the upper shear box and the lower shear box; water drainage slots are formed in the sample accommodating rings at the bottom of the lower shear box; and the water drainage function is shut down according to a test requirement. The assembled size-changeable double-face shear apparatus can perform the double-shear-face direct shear test on a soil sample and soft rock, and a lateral-restrict-free single-shaft compression test on hard rock is easy to operate, convenient to maintain and detachable, has high environmental adaptability, and is suitable for being used in indoor and outdoor rock direct shear compression tests.

Description

technical field [0001] The invention relates to a test device, which is mainly used for indoor or field double shear plane direct shear 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, etc. Indoor direct shear tests include standard ring knife direct shears and large-size square box direct shears. These tests need to be done indoors, but: first, the samples are sheared under a fixed sample size, and the change in the sample size cannot be realized; second, double-sided shear tests are rarely carried out, especially At present, there are few reports about double-sided shearing instrument and related tests. [0003] According to...

AI Technical Summary

Problems solved by technology

These tests need to be done indoors, but: first, the samples are sheared under a fixed sample size, and the change in the sample size cannot be realized; second, double-sided shear tests are rarely carried out, especially At present, there are few reports about double-sided shearing instrument and related tests

[0003] According to the actual engineering situation, the conventional single-sided direct shear instrument may have inhomogeneity on the artificially set shear plane

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