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Middle-sized rock servo control true triaxial test device

A technology of servo control and test device, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of large size span, etc., and achieve the effect of high degree of automation, convenient installation and operation, and simple equipment

Active Publication Date: 2013-03-13
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • 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] The present invention will be further described in detail below in conjunction with the drawings and embodiments:

[0026] The invention includes an axial reaction force system, a lateral reaction force system, a servo loading control system, a movement system and a measurement system. Applicable sample size is variable, sample size range: length 80~200mm, width 80~200mm, height 160~400mm; use cavern or steel frame to provide axial reaction force, axial output jack maximum load 12000kN, square The thick-walled hollow steel frame provides lateral reaction force. Four hollow jacks are built in the reaction force frame to act on the side of the specimen respectively, with a maximum load of 4000kN; by changing the size of the six-sided bearing plate of the specimen, various sizes of real In the triaxial test, one end of the stylus passes through a force transmission device with a through hole and the output device directly contacts the center of the surface of the test body 11...

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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 the rock mass under the three-dimensional stress state to study the excavation process and support effect of underground engineering under complex stress conditions, especially the ultra-large and ultra-long tunnels and large-scale tunnels under deep and high stress conditions. The study of the failure form, failure mechanism and stable state constitutive relationship of caverns and steep slopes requires true triaxial tests of rocks. For other materials, such as concrete, under complex stress paths, the triaxial strength and deformation parameters of the experimental study often use standard cubic test blocks specified in the specification. However, the current domestic true triaxial i...

Claims

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Application Information

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Patent Type & Authority Applications(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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