Isolating type triaxial test device

A triaxial test, isolated technology, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of large volume of the test device, cumbersome and time-consuming operation, oil filling and draining, etc. The effect of work efficiency and simple structure

Inactive Publication Date: 2016-11-23
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test device with this structure has three major deficiencies: first, oil must be filled and drained for each test; second, the sample needs to be tightly wrapped and not necessarily effective; third, the test device is large in size and heavy in weight
Therefore, cumbersome and time-consuming operations and low efficiency are the inherent weaknesses of this structure

Method used

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  • Isolating type triaxial test device

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0031] 1. Overall

[0032] Such as figure 1 , the device includes a press A, a pressurizing device B, hydraulic oil C, a pipe joint D, a strain gauge E and a strain gauge F;

[0033] It is equipped with an upper pressure head 1, an upper transparent cover 2, a pressure chamber 3, a plug 4, a plug seat 5, an isolation sleeve 6, a sample 7, a lower transparent cover 8, a lower pressure head 9 and an elastic pad 10;

[0034] Its location and connection relationship are:

[0035] The upper and lower parts of the pressure chamber 3 are respectively connected with upper and lower transparent covers 2 and 8 to form an overall space, and along the center line of the overall space from bottom to top, the lower indenter 9, the sample 7 and the upper indenter 1 are arranged in sequence. , the lower pressure head 9 is covered with an elastic pad 10, and is isolated from the inner wall of the pres...

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Abstract

The invention disclose an isolating type triaxial test device, and relates to a device for carrying out mechanical property tests on rock and concrete materials in a pressure state. According to the main structure of the device, the upper portion and the lower portion of a pressure chamber are connected with an upper penetrating cover and a lower penetrating cover respectively to form an overall space, a lower pressing head, a sample and an upper pressing head are sequentially arranged along the center line of the overall space from bottom to top, and the lower pressing head is sleeved with an elastic cushion and isolated from the inner wall of the pressure chamber through an isolating sleeve; hydraulic oil is injected into the space formed by the pressure chamber and the isolating sleeve through the pressurizing device; a strain gage attached to the side face of the sample is connected with a strain gauge to test strain; a press applies test axial pressure to the sample through the upper pressing head. According to the device, pressure oil is located in an airtight space, repeated oil charge or drainage is not needed, and the sample does not need to be wrapped. Due to the fact that the device is simple in structure, small in size and light, operation is easy and convenient, and working efficiency is greatly improved.

Description

technical field [0001] The invention relates to a device for testing the mechanical properties of rock and concrete materials under pressure, in particular to an isolated triaxial test device. Background technique [0002] The real stress state of rock and concrete materials in nature and engineering and the mechanical properties in this state are important indicators of geotechnical engineering design; the main method to obtain this indicator is to apply a certain lateral pressure to the sample Carry out a compressive strength test, that is, a professionally called triaxial compressive strength test. The usual practice of the triaxial compression test is to place the sample in a pressure chamber, pressurize the hydraulic oil in the pressure chamber, form a lateral pressure on the sample, and then apply an axial force to test its mechanical properties. In the test device with a known structure, the sample is placed in a pressure chamber filled with hydraulic oil, and the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
CPCG01N3/12
Inventor 李海波周百海
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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