Testing method capable of realizing whole-process tracing of shear strength test of structural plane

Abstract

The invention provides a testing method capable of realizing whole-process tracing of a shear strength test of a structural plane. The method comprises the following steps: (1) acquiring a model by three-dimensional scanning of an original rock structural plane, and acquiring the morphology changes of a three-dimensional surface in the progressive process of shearing; (2) based on a whole-processvisualization testing method, testing a transparent sheared sample by using a direct shear tester for indoor rock structural planes; (3) recording test data and carrying out multi-directional CCD photographing synchronously; (4) comparing the morphology of the structural plane by regions, and visually describing the surface damage conditions of the structural plane in each region, respectively; (5) integrating each shooting region and visually describing the location, number and expansion of cracks; and (6) carrying out shear test research under the conditions of different surface morphologies and different stresses. The testing method provided by the invention analyzes the gradual change process of the shear morphology characteristics of the structural plane and the extension and changerules of cracks around the structural plane under the conditions of different structural plane morphologies and different stresses.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering in civil engineering, in particular to a whole-process vision trace test method for a shear strength test of a structural plane. Background technique [0002] Rock mass is the product of geological history, and it is a geological body that exists in the geological environment, has undergone deformation and destruction, and has certain rock composition and structure. Rock mass is composed of rock and structural plane, and the structural plane is the weak link in the rock mass, which often controls the deformation and failure of the rock mass. Over the years, many scholars have done a lot of research on the mechanical behavior of structural surfaces, using many means including experiments and numerical simulations to reveal the mechanical properties of structural surfaces. Some studies have shown that the failure characteristics of the surface morphology of the structural surface d...

AI Technical Summary

Problems solved by technology

Studies have shown that the failure characteristics of the surface morphology of the structural surface during the shear process determine the peak shear strength. However, the current direct shear test can only measure the final failure form of the surface of the structural surface, and cannot obtain the damage characteristics of the structural surface during the shear process. Gradual change law of three-dimensional shape in

Images