Sample production apparatus suitable for jointed rock direct shear test, sample production and shearing apparatus, and sample production and shearing test method

Abstract

The invention provides a sample production apparatus suitable for jointed rock direct shear test. The apparatus comprises a sample production assembly and a joint molding assembly, wherein the joint molding assembly is fixed through upper and lower positioning members. The invention also provides a sample production and shearing apparatus. A direct shearing device conversion assembly is arranged on the basis of the sample production apparatus, the joint molding assembly is dismounted from a model molded through a die of the sample production apparatus, the conversion assembly is fixedly arranged to form a shear box, and the shear box is used for direct shear test. The invention also provides a method for carrying out sample production and direct shear test by using the sample production and shearing apparatus. The problems of change of the jointing shape in the molding process and difficult formation of multiple joints in the model are well solved, and the apparatuses realize direct shear test without removing the sample production assembly from the model, and solve the problem of the influence of damages of demoldling and sample loading to the structure of the rock in the prior art on a test result.

Description

technical field [0001] The invention relates to the technical field of direct shear test of jointed rock mass, provides a sample preparation device and a sample preparation and shearing device suitable for jointed rock mass direct shear test, and also provides a sample preparation and shearing test using the sample preparation and shearing device Methods. Background technique [0002] The engineering mechanical parameters of jointed rock mass are the premise and foundation of engineering design, and whether the value is reasonable or not is directly related to the economy and safety of the project. [0003] As the product of long-term geological tectonic movement, rock mass contains a large number of discontinuous structural planes such as faults, joints, bedding, fissures, etc. These structural planes intersect each other to form a specific rock mass structure. This complex rock mass medium is unique. Its structural characteristics make it very difficult to determine its e...

AI Technical Summary

Problems solved by technology

[0006] (1) The mold of the prefabricated jointed rock mass lacks a joint positioning device, which may cause changes in the geometry of the joints during the molding process;

[0007] (2) The existing technology is not suitable for the production of multi-joint rock mass models;

[0008] (3) In the existing technology, during the test process, the jointed rock mass sample needs to be demolded and loaded, which may cause damage to the rock mass structure and affect the test results

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