Device and method for measuring high-temperature creep volume deformation of rocks

A technology of volume deformation and high-temperature creep, which is applied to the device for measuring high-temperature creep volume deformation of rocks, and in the field of rock experiment devices, can solve the problems of direct measurement of sample creep volume deformation and inability to achieve simple installation and connection, high precision High, small size effect

Inactive Publication Date: 2020-06-12
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the existing rock strain measurement device can only measure the axial and radial deformation of the sample, but cannot accurately and directly measure the creep volume deformation of the sample for a long time, and provides a method for measuring high temperature rock Apparatus and method for creep volume deformation

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  • Device and method for measuring high-temperature creep volume deformation of rocks

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Such as figure 1 As shown, a device for measuring high-temperature creep volume deformation of rock in this embodiment includes a triaxial test kettle, an axial displacement sensor 9, a magnetic liquid level gauge 11, a confining pressure control port 13, and a gas loading system 14. Liquid loading system 15, data acquisition and processing system 12 and five control valves. The triaxial test kettle is composed of the outer cavity of the test kettle 1, the inner cylinder of the test kettle, the pressure transmission cylinder 2, and the upper pad 3-1 , lower pad 3-2, rubber sleeve 5, bottom contact pad 7, cover 16 and heating device 10, the upper pad 3-1 and lower pad 3-2 are respectively arranged in the inner cavity of rubber sleeve 5 The upper and lower ends of the test kettle are composed of an upper cover 8-1, a cylinder body 8-2, a lower cov...

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Abstract

The invention relates to a device and a method for measuring high-temperature creep volume deformation of rocks. The technical problem that creep volume deformation of a sample cannot be directly measured by an existing device is solved. According to the scheme adopted by the invention, the device for measuring the high-temperature creep volume deformation of the rocks comprises a triaxial test kettle, an axial displacement sensor, a magnetostrictive liquid level meter, a confining pressure control port, a gas loading system, a liquid loading system, a data acquisition and processing system and five control valves. The method comprises the following steps: 1) firstly, connecting all parts; 2) carrying out gas and liquid loading on a confining pressure cavity of the triaxial test kettle, sothat the confining pressure cavity is loaded to the target confining pressure of the sample; 3) applying axial pressure to carry out a creep test under target temperature and pressure, 4) recordinginitial data of the sample in a data acquisition and processing system, setting a data recording interval and carrying out automatic data recording, and 5) calculating high-temperature creep volume deformation and volume strain of the rock sample through a formula according to the recorded data.

Description

technical field [0001] The invention relates to a device and a method for measuring high-temperature creep volume deformation of rock, which belong to the technical field of rock experiment devices and methods. Background technique [0002] In geotechnical projects such as slopes and mining, rock materials are extremely prone to time-dependent creep deformation. Creep mechanics test results of laboratory-scale rock samples can provide effective reference for prediction of field deformation data. In indoor rock material creep experiments, the axial strain and radial strain of the sample are mostly measured by the displacement sensor of the rock testing machine, and rarely directly involve the measurement of the volume deformation of the sample, and most of them are indirectly measured through the volume strain formula of rock mechanics. Calculate the volume deformation, or use the accelerated deformation critical point of the axial or radial strain of the sample to predict t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01F17/00
CPCG01N3/12G01F17/00G01N2203/0256G01N2203/0682
Inventor 蔡婷婷冯增朝姜玉龙赵东苏晓玉
Owner TAIYUAN UNIV OF TECH
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