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Tension-shear test device and test method for jointed columnar rock

A test device and test method technology, applied in the direction of using a stable shear force to test the strength of materials, measuring devices, and using a stable tension/pressure test to test the strength of materials, etc., can solve the problems affecting the accuracy of the tensile shear test results, etc., To facilitate the study of other mechanical properties, avoid the effect of eccentricity, and simplify the structure of the device

Pending Publication Date: 2020-12-01
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the deformation of the rock mass in the horizontal direction during the loading process of this device, the tensile force in the vertical direction will not continue to act on the center of the rock mass specimen, so it will have an eccentric effect on the tension loading of the entire specimen. And then affect the accuracy of the tensile and shear test results

Method used

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  • Tension-shear test device and test method for jointed columnar rock
  • Tension-shear test device and test method for jointed columnar rock
  • Tension-shear test device and test method for jointed columnar rock

Examples

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Embodiment 1

[0056] Embodiment 1: see Figure 1-5 , a tensile-shear test device for columnar rocks containing joints, comprising a test structure, a hydraulic servo control system 15, a data collector 16, a computer host 17 and a computer display 18.

[0057] The test structure includes a sample fixing unit, a tension generating unit, a supporting unit and a conversion unit.

[0058] The sample fixing unit includes an upper bonding block 9 and a lower bonding block 12, both of which are of stepped shaft structure, and the stepped shaft has two sections, and the upper bonding block Block 9 is positioned at the top of following bonding block 12, and one end that last bonding block 9 diameters is little and the end that lower bonding block 12 diameters are little are opposite, the lower surface of last bonding block 9 and the upper surface of following bonding block 12 Both are provided with vertical circular grooves, and the two circular grooves on the upper bonding block 9 and the lower bo...

Embodiment 2

[0069] Example 2: see Figure 1-5 , a tensile-shear test method for columnar rocks containing joints, using the tensile-shear test device for columnar rocks containing joints described in Example 1, the method steps are as follows.

[0070] S100: making a rock sample 11 containing joints.

[0071] S200: Install and fix the rock sample 11 into the test device.

[0072] S300: The host computer 17 sets a contraction rate for the hydraulic cylinder 1 through the hydraulic servo control system 15, and the hydraulic servo control system 15 controls the piston end 4 of the hydraulic cylinder 1 to contract at the set rate, so that the rock sample 11 is vertically Under tension, when the rock sample 11 is damaged by tension and shear, the hydraulic servo control system 15 controls the piston end 4 of the hydraulic cylinder 1 to stop shrinking, and the hydraulic servo control system 15 feeds back the shrinking time of the hydraulic cylinder 1 to the computer host 17.

[0073] S400: At...

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Abstract

The invention discloses a tension-shear test device and a tension-shear test method for jointed columnar rock. The tension-shear test device for the jointed columnar rock comprises a test structure, ahydraulic servo control system, a data collector, a computer host and a computer display; the test structure comprises a sample fixing unit, a tension generation unit, a supporting unit and a conversion unit; the sample fixing unit is used for fixing a rock mass sample, the tension generation unit is used for applying tension to the rock mass sample, the supporting unit provides a supporting effect for applying the tension, and the conversion unit is used for converting mechanical changes of the rock mass sample into data information; according to the test method, the test device is used forcarrying out the rock tension-shear test, the operation is simple, and the obtained test data can truly reflect the stress characteristics of the rock in the tension-shear process; and for obtaining amore accurate and perfect rock constitutive model and establishing a corresponding strength criterion, the method has very important significance.

Description

technical field [0001] The invention relates to the technical field of rock mass tension-shear strength testing, in particular to a tension-shear test device and a test method for columnar rocks with joints. Background technique [0002] With the rapid development of social economy and the sharp consumption of resources, people have carried out a large number of geotechnical engineering activities, such as tunnel engineering, mining engineering, slope engineering and so on. Most geotechnical engineering activities involve the excavation of rock mass, but during the excavation process of rock mass, different parts of the rock mass are subjected to different forces, resulting in different deformation and damage inside the rock mass. same. Among them, the tensile-shear failure of rock is very common in the actual excavation process. For example, the excavation process of rock tunnel will cause the normal stress unloading of the side wall of the cavern, and the tangential stres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G01N3/10G01N3/04G01N3/06
CPCG01N3/24G01N3/10G01N3/04G01N3/06G01N2203/0017G01N2203/0048G01N2203/0067G01N2203/0298G01N2203/0429G01N2203/0676G01N2203/0682
Inventor 赵瑜全大国王超林毕靖滕明阳李佳申杨进强丁丁
Owner GUIZHOU UNIV