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A rock true triaxial test system and method with CT real-time scanning system

A test system and scanning system technology, applied in the field of rock true triaxial test system, can solve problems such as not being able to represent rock

Active Publication Date: 2017-10-27
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0011] Although the experimental systems involved in the above two patents can realize CT real-time scanning of rock sample loading, they mainly involve conventional triaxial or false triaxial test devices. Testing the strength and deformation laws under the axisymmetric stress state does not represent the general stress state that the rock is actually subjected to, that is, the true triaxial

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  • A rock true triaxial test system and method with CT real-time scanning system
  • A rock true triaxial test system and method with CT real-time scanning system
  • A rock true triaxial test system and method with CT real-time scanning system

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specific Embodiment approach

[0051] Step 1: first fix the bottom plate 2 on the base 1, cover the ends of the four carbon fiber columns 9 with metal sleeves 16, and bond them with epoxy structural adhesive 21 to enhance the compression and shear resistance of the ends of the columns 9 , the metal sleeves 16 are respectively fixed on the bottom plate 2 and the top plate 8, and the vertical spacer 7 is welded and fixed on the bottom of the top plate 8; the bottom plate 2, the top plate 8 and the vertical spacer 7 are all made of Q460 high-strength steel, and the four columns 9 are made of High tensile strength carbon fiber (T800) material;

[0052] Step 2: Fix the vertical electric jack 3 on the bottom plate 2, and fix the vertical measuring device 4 on the vertical electric jack 3;

[0053] Step 3: Weld and fix one of the lateral reaction walls 10 located at the front, rear and left and right to the top plate 8 and the bottom plate 2 respectively, and set the lateral reaction wall 10 on the other side as a...

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Abstract

The invention relates to a rock true triaxial test system and method with a CT real-time scanning system, comprising a true triaxial pressure box, a true triaxial mainframe frame, a loading device, and a CT scanning device; the true triaxial mainframe frame includes a bottom plate and a top plate and supported on the bottom plate and the column; the loading device includes a reaction force device, as well as a jack and a measuring device; the pressure box, the column, and the reaction force device located in the scanning area of ​​the CT scanning device are all made of carbon fiber materials. The specially designed lateral loading system, carbon fiber force transfer plate and upright column solves the problem that X-rays cannot penetrate the traditional true triaxial testing machine, and overcomes the need to unload and remove the rock sample from the true triaxial test bench in the traditional test. The drawbacks of CT scanning test are to realize the real-time cooperation of true triaxial rock and CT scanning test, which is of great significance to study the real-time expansion and evolution of micro-cracks and micro-cavities in rock under true triaxial stress state.

Description

technical field [0001] The invention belongs to the field of rock mechanics and rock testing, in particular to a rock true triaxial testing system and method with a CT real-time scanning system. Background technique [0002] The true triaxial tester can simulate the real three-dimensional stress state of the engineering rock mass, analyze the strength and deformation characteristics of the rock under three different principal stress conditions, and can perform independent tests on each surface of the rock sample according to certain changes during the true triaxial test. The principle stress is applied accurately, and the corresponding principal strain is measured to realize various complex stress loading paths, so as to reveal the deformation and failure characteristics of rock more systematically, comprehensively and deeply. [0003] The failure of rock mass is usually caused by the initiation, development and final interconnection of micro-cracks and micro-cavities in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12G01N23/04
Inventor 陆银龙李兆霖王连国蒋邦友
Owner CHINA UNIV OF MINING & TECH
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