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A Pseudo Triaxial Testing Method Based on Dynamic Fatigue Testing Machine

A technology of dynamic fatigue and testing methods, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., to achieve the effects of strong reliability, high control precision and complete protection functions

Active Publication Date: 2019-05-17
PLA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional triaxial rock mechanics tests generally apply a certain confining pressure to the rock, and then keep the confining pressure constant (that is, σ2 = σ3) to increase the maximum principal stress σ1 to cause rock damage. This test method can only study axisymmetric stress state, not applicable to the influence of intermediate principal stress on rock mass strength and deformation

Method used

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  • A Pseudo Triaxial Testing Method Based on Dynamic Fatigue Testing Machine
  • A Pseudo Triaxial Testing Method Based on Dynamic Fatigue Testing Machine
  • A Pseudo Triaxial Testing Method Based on Dynamic Fatigue Testing Machine

Examples

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Embodiment 1

[0026] This embodiment provides a pseudo-triaxial testing device based on a dynamic fatigue testing machine, the structure of which is as follows: figure 1 , figure 2 As shown, including the column 6, the upper and lower ends of the column 6 are respectively provided with an upper hydraulic chuck and a lower hydraulic chuck 13, the upper hydraulic chuck is connected to the upper end of the upper pressure column 7, and the lower end of the upper pressure column 7 is connected to the upper connection block 3, The lower end of the upper connection block 3 is fixedly equipped with a pressure chamber main body 8, and the pressure chamber base 9 is correspondingly provided below the pressure chamber main body 8, and the pressure chamber base 9 is fixedly installed on the trolley, and at least two square axles 4 and square axle 4 Wheels 11 are respectively installed at both ends, and the wheels 11 are arranged on the guide rail 10, and the guide rail 10 is horizontally installed in ...

Embodiment 2

[0030] The present embodiment provides a pseudo-triaxial test method based on a dynamic fatigue testing machine, comprising the following specific steps:

[0031] Step (1), assembling the sample into a sample assembly as required;

[0032] Step (2), install pads on the pressure chamber base 9, and then place the sample assembly on the pads, the pads include a first pad 901 and a second pad 902, and the pressure chamber base 9, the first pad The cylindrical pin 903 is used for connection and positioning between the block 901 and the second pad 902, and the total height of the "pad + sample assembly + upper pad 809 + joint bearing seat" is 290±20mm, wherein the joint bearing seat includes The cushion cover 805, the outer spherical body 806 and the inner spherical body 807 are installed sequentially from the inside to the outside;

[0033] Step (3), hoist the main body 8 of the pressure chamber on the base 9 of the pressure chamber, close and tighten the bearing bush 905, and ho...

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Abstract

The invention discloses a pseudo-triaxial test method based on adynamic fatigue testing machine. The method comprises the steps of assembling specimens into a specimen assembly according to the requirement; installing the specimen assembly; charging liquid; powering on for operation, conducting a test, and saving data after the test is finished; after the test is finished, unloading a loading force and emptying hydraulic oil in a pressure chamber; disassembling the specimen assembly to finish the test. According to the test method provided by the invention, equipment is refitted on the basis of the dynamic fatigue testing machine, so that an elastic parameter of a rock can be measured, and a strain test, a creep test and a relaxation test are finished at different confining pressures, and a flow parameter of a stratum is tested, and the breaking tenacity of the rock and the in-situ stress of the stratum are tested under a simulated in-situ stress level.

Description

technical field [0001] The invention belongs to the technical field of rock pseudo-triaxial testing equipment, and relates to a pseudo-triaxial testing method based on a dynamic fatigue testing machine. Background technique [0002] Under natural conditions, the crust and engineering rock mass are deformed and destroyed under complex combined stress states. Rock mass is a complex geological body, which is in a complex three-dimensional stress field, and the failure of rock mass is usually caused by the change of its existing stress state. Conventional triaxial rock mechanics tests generally apply a certain confining pressure to the rock, and then keep the confining pressure constant (that is, σ2 = σ3) to increase the maximum principal stress σ1 to cause rock damage. This test method can only study axisymmetric stress State, not applicable to the influence of intermediate principal stress on rock mass strength and deformation. Contents of the invention [0003] The techni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0048G01N2203/0073
Inventor 马林建王明洋张宁赵跃堂吕亚茹王亚松董璐
Owner PLA UNIV OF SCI & TECH