Method for pretreating rock sample in rock shear test and fastening device

Abstract

The invention provides a method for pretreating rock samples in a rock shear test, which is used for loading a pair of rock samples through a tool machine, the tool machine comprises a case, a pressing structure is arranged on the case, and the pair of rock samples are correspondingly arranged in a left test box and a right test box; the method comprises the following steps: correspondingly arranging a left test box and a right test box between a pair of pressing structures, so that one ends, close to each other, of a pair of rock samples in the left test box and the right test box are attached to each other; turning over the tool machine to enable the pair of rock test blocks in the tool machine to form an up-and-down superposition form; paving a filling body between the pair of rock test blocks; the left test box and the right test box are correspondingly pressed through a pair of pressing structures; smearing sealant on the inner side and the outer side of the filling body between the pair of rock test blocks; and the left test box and the right test box are fastened through a fastening device, so that the pair of samples containing the filling body structural surfaces in the left test box and the right test box form an integrated structure.

Description

technical field [0001] The invention belongs to the technical field of rock shearing, and in particular relates to a method and a fastening device for preprocessing a rock sample in a rock shearing test. Background technique [0002] The shear strength of rock is one of the important indicators to evaluate the mechanical properties of rock, and the accurate acquisition of strength parameters has important practical significance for rock mass engineering. At present, the shear strength of rock is mainly obtained through laboratory tests. The main test types include: conventional triaxial test, direct shear test and wedge shear test. Analyzing the existing test implementation methods, the force on the shear surface of the rock is not uniform during the shearing process, and the deformation is delayed, which cannot accurately reflect the shear strength of the rock. The rock tension-compression ring shear tester adopts a ring sample and applies torsion to make the rock uniforml...

AI Technical Summary

Problems solved by technology

That is to say, for the rock ring shear test on the rock sample, in the prior art, there is still the inability to effectively fix the filling body on the rock sample before the test, resulting in the mechanical characteristics measured by the ring shear test on the rock sample. The disadvantages of inaccurate parameters;

[0003] In the direct shear test, the horizontal shear loading method also has the problem that the filling body on the structural surface is scattered due to gravity, which affects the accuracy of the mechanical characteristic parameters measured by the test.

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