Sample preparation device, sample preparation shear device and sample preparation shear test method suitable for direct shear test of jointed rock mass

Abstract

The invention provides a sample preparation device suitable for direct shear test of jointed rock mass, which comprises a sample preparation component and a joint forming component, wherein the joint forming part is fixed by the upper and lower positioning parts. The present invention also provides a sample preparation and shearing device, which is based on the above sample preparation device plus a conversion assembly of a straight shear device, after the model formed by the above sample preparation device is removed from the joint forming assembly, the conversion assembly is fixed to form A shear box, on which a direct shear test is performed. The invention also provides a method for sample preparation and direct shear test with the sample preparation shearing device. The present invention well solves the problems that the shape of the joints changes during the molding process and it is difficult to form multi-joints in the model, and the device can make the model do not need to come out of the sample preparation assembly to carry out the direct shear test, which solves the problem of the prior art The demoulding and sample loading will cause damage to the rock mass structure and affect the test results.

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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