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

A test method and shear strength technology, applied in the field of geotechnical engineering, can solve the problem of inability to obtain the three-dimensional shape gradient law of the structural surface.

Active Publication Date: 2018-10-02
SHAOXING UNIVERSITY
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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 mea

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

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[0026] Example: The whole process of the sight-tracking test method of the structural surface shear strength test of the present embodiment includes the following steps:

[0027] (1) Select an engineering rock mass structure surface with a side length of 100mm*100mm, perform 3D scanning of the original rock structure surface to obtain a model, and then 3D print the 3D model with a transparent material to obtain a similar model structural surface sample. A CCD camera is placed in the front and rear, which is responsible for the change of the structure surface in the two regions and the shooting of the crack expansion around the structure surface during the test process, so as to obtain the three-dimensional surface shape change in the shear progressive process. Camera A is responsible for the first half area, B The rear half of the camera, such as figure 1 shown.

[0028] (2) Based on the whole-process visualization test method, the self-developed indoor rock structure plane d...

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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...

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Application Information

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IPC IPC(8): G01N3/06
CPCG01N3/068G01N2203/0025G01N2203/0067G01N2203/0075G01N2203/0647
Inventor 黄曼马成荣刘燕强杜时贵夏才初罗战友
Owner SHAOXING UNIVERSITY
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