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Middle-sized rock servo control true triaxial test device

A technology of servo control and test device, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve problems such as large size span, and achieve the effect of high degree of automation, high system rigidity and measurement accuracy, and simple equipment

Active Publication Date: 2015-05-06
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves many problems caused by the large size span of rock true triaxial samples in the field and indoor

Method used

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  • Middle-sized rock servo control true triaxial test device
  • Middle-sized rock servo control true triaxial test device
  • Middle-sized rock servo control true triaxial test device

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Experimental program
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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0026] The invention includes an axial reaction force system, a lateral reaction force system, a servo loading control system, a moving system and a measuring system. Applicable sample size is variable, sample size range: length 80~200mm, width 80~200mm, height 160~400mm; cavity or steel frame is used to provide axial reaction force, the maximum load of axial output jack is 12000kN, square The thick-walled hollow steel frame provides lateral reaction force, and four hollow jacks built into the reaction force frame act on the side of the sample respectively, with a maximum load of 4000kN; by changing the size of the pressure plates on the six sides of the test body, it is possible to carry out real tests of various sizes. In the triaxial test, the stylus passes through the force transmission device with through holes and one end of the force output device...

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Abstract

The invention discloses a middle-sized rock servo control true triaxial test device, which comprises a top plate, a base plate, a positioning pillar arranged between the top plate and the base plate, a top force transmission member, at bottom force transmission member, an axial jack arranged under the top force transmission member, a lateral arrow, an upper axial arrow, a lower axial needle arrow, a displacement sensor, a measuring bar matching with the displacement sensor, a computer, a servo control unit, a pulley fixed on the axial jack, a supporting frame for supporting the pulley, a lateral counter-force steel frame arranged surrounding the top of the bottom force transmission member, and a plurality of lateral jacks evenly arranged on periphery of the lateral counter-force steel frame. The device provided by the invention adopts three-dimensional load independent servo control, and can conduct true triaxial test on complex stress path, acquire data automatically and obtain a whole process stress-strain curve.

Description

technical field [0001] The invention relates to the technical field of rock mechanics test equipment, in particular to a servo-controlled true triaxial test device for medium-sized rocks. technical background [0002] At present, it tends to use the deformation parameters and strength parameters of rock mass under the three-dimensional stress state to study the excavation process and support effect of underground engineering under complex stress state, especially for super-large and super-long tunnels and large-scale tunnels under deep-buried and high-stress conditions. The true triaxial test of rock is necessary for the study of the failure form, failure mechanism and constitutive relationship of the stable state of caverns and steep slopes. For the triaxial strength and deformation parameter test research of other materials such as concrete under the complex stress path, the cubic standard test block specified in the code is often used, but the true triaxial test of this s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
Inventor 周火明李维树钟作武邬爱清丁秀丽黄书岭张宜虎郝庆泽
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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