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Device for applying prestress to rock sample in freezing and thawing test

A rock specimen and prestressing technology, applied in measuring devices, using stable tension/pressure testing materials, instruments, etc., can solve the problems of complicated operation, large space occupied by force stabilization devices, and low accuracy.

Pending Publication Date: 2019-01-04
CENT SOUTH UNIV
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Problems solved by technology

However, the actual engineering rock mass is often subject to the coupling damage of multiple factors, and the influence of only one factor is considered to deviate from the actual situation. Therefore, it is urgent to develop an experimental system that subjects rock specimens to the coupling effects of multiple factors such as freeze-thaw and load.
[0004] Some scholars proposed to apply prestress to the rock specimen first, and then put the specimen and the stabilizing device in the freeze-thaw test machine for testing. Although this method can realize the coupling effect of prestress and freeze-thaw environment, its operation is complicated. , the accuracy is low, and the space occupied by the stabilizing device is relatively large

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  • Device for applying prestress to rock sample in freezing and thawing test
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  • Device for applying prestress to rock sample in freezing and thawing test

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Embodiment Construction

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more fully and in detail below in conjunction with the accompanying drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0023] Such as Figure 1-4 , the device for applying prestress to the rock test piece in the freeze-thaw test includes a freeze-thaw test box 18, a hydraulic system and a control system, and the test piece support frame 20 and the test piece support frame 20 are arranged in the freeze-thaw test box The freezing pipe 19 below the support frame is connected to the external cooling system. The left and right sides of the top of the specimen support frame are respectively provided with a left pressing plate 16 and a right pressing plate 10, and the left pressing plate and the right pressing plate are pushed towards each other by the hydraulic system. Or away from...

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Abstract

The invention discloses a device for applying prestress to a rock sample in freezing and thawing test. The device comprises a freezing and thawing test box, a hydraulic system and a control system, asample supporting frame and a freezing pipe are arranged in the freezing and thawing test box, a left pressing plate and a right pressing plate are arranged on the left side and the right side of thetop of the sample supporting frame and pushed by the hydraulic system to oppositely draw close or keep away from each other to load or unload the sample, and the control system is in control connection with the hydraulic system. By the aid of the device for applying prestress to the rock sample in the freezing and thawing test, the prestress is applied to the sample during freezing and thawing, and the resistance of the rock sample in freezing and thawing and load coupling environments is comprehensively assessed.

Description

technical field [0001] The invention relates to the technical field of rock test pieces loading, in particular to a device for applying prestress to rock test pieces in freeze-thaw tests. Background technique [0002] In cold regions, the alternation of freeze-thaw changes can easily lead to a series of disasters such as mudslides, landslides, landslides, and ice cones, causing damage to construction and ecosystems in cold regions. With the increase of mining and geotechnical engineering activities in cold regions, more and more of these activities have touched the rock mass under the condition of alternating temperature, that is, frozen and thawed rocks have appeared, and landslides and landslides have also been exacerbated to varying degrees. , Earthquakes, mudslides and other geological disasters. [0003] The current freeze-thaw test machine can better test the resistance of rock specimens in freeze-thaw environments. However, the actual engineering rock mass is often ...

Claims

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Application Information

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IPC IPC(8): G01N3/18G01N17/00
CPCG01N3/18G01N17/002G01N2203/0019G01N2203/0048G01N2203/0228
Inventor 刘涛影周科平高峰熊信张朝阳蒋震
Owner CENT SOUTH UNIV
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