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Strain-control-type low-temperature unconfined compressometer

A confining compression and strain control technology, used in instruments, scientific instruments, and testing the strength of materials by applying stable tension/pressure. and other problems to achieve the effect of a good temperature environment

Inactive Publication Date: 2018-09-04
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the indoor test, the operation is simple, the result is accurate, the operation is standardized, and the operation steps and test conditions of the rock compressive strength test are relatively mature, but there are still the following disadvantages: 1. The collection of rock samples at low temperature is prone to disturbance; 2. For In areas with low temperature, the disturbance to the sample is particularly serious, and the temperature has a great influence on the sample, and the mechanical properties of the sample are greatly affected after the freeze-thaw cycle; 3. The samples are generally at room temperature (20°C left and right), so that the analysis of mechanical properties of rock samples that have been in a low temperature state for a long time will cause errors, which are not enough to reflect the real compressive characteristics of the rock mass

Method used

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  • Strain-control-type low-temperature unconfined compressometer
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  • Strain-control-type low-temperature unconfined compressometer

Examples

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Effect test

Embodiment 1

[0022] The main structure of the strain-controlled low-temperature unconfined compression instrument involved in this embodiment includes a loading frame 1, a vertical force gauge 2, an upper pressure plate 3, a rock sample 4, an electric handwheel 5, a vertical displacement gauge 6, and a handle 7. Lifting plate 8, temperature insulation box 9, temperature display screen 10, temperature control button 11, moving wheel 12, temperature control body 13, connecting rod 14, lower transmission pressure plate 15 and fixed rod 16; temperature control body of box structure The bottom of 13 is provided with moving wheel 12; The upper side of temperature control body 13 is fixedly provided with the insulated box 9 of barrel-shaped structure, and insulated box 9 regulates temperature through temperature control body 13; One side of temperature control body 13 A temperature control button 11 is provided to select different temperatures, and the upper side of the temperature control button ...

Embodiment 2

[0032] Such as Figure 1 to Figure 3 As shown, a strain-controlled low-temperature unconfined compressor is characterized in that: the low-temperature refrigeration box is equipped with a heat insulating plate (9) to cut off the flow of air in the unconfined compressor and the outside air, and the low-temperature refrigeration box has The single door is controlled by an opening handle (7). The vertical dynamometer (2) is composed of a force measuring ring and a vertical displacement gauge, and the vertical load is calculated by the displacement of the vertical displacement gauge. The vertical displacement meter (6) is fixed on the fixed rod above the upper pressing plate (3). The lower end contacts with the lifting plate (8). The strain control type is controlled by an electric handwheel to control its lifting rate. The refrigerating case (13) has a temperature display screen (10), which shows the temperature in the low-temperature refrigerating case. The refrigeration cas...

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Abstract

The invention belongs to the field of geotechnical engineering and soil tests, and relates to a geotechnical engineering indoor testing device and a testing method, and particularly relates to a strain-control-type low-temperature unconfined compressometer. The major structure of the strain-control-type low-temperature unconfined compressometer comprises a loading frame, a vertical forcemeter, anupper pressure transferring plate, a rock sample, an electric hand wheel, a vertical displacement meter, a handle, a lifting plate, a heat-insulating box, a temperature display screen, a temperature control button, a moving wheel, a temperature control machine body, a connecting rod, a lower pressure transferring plate and a fixing rod. The strain-control-type low-temperature unconfined compressometer is capable of accurately measuring the compressive strength of rock soil (a soil body) in a severe cold area, and detecting the anti-pressure ability of the sample in a low temperature and the influence of the temperature to the strength of the rock soil (the soil body) in real time.

Description

Technical field: [0001] The invention belongs to the field of geotechnical engineering and geotechnical testing, and relates to a geotechnical engineering indoor test device and a test method, in particular to a strain-controlled low-temperature unconfined compression instrument. Background technique: [0002] In civil engineering tests, especially for rock mechanics engineering, it is a common method to study the mechanical properties of rock samples (soil samples) through in-situ tests and indoor tests. Especially the indoor test, the operation is simple, the result is accurate, the operation is standardized, and the operation steps and test conditions of the rock compressive strength test are relatively mature, but there are still the following disadvantages: 1. The collection of rock samples at low temperature is prone to disturbance; 2. For In areas with low temperature, the disturbance to the sample is particularly serious, and the temperature has a greater impact on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18G01N3/02
Inventor 冯磊王旭春唐强冯燕张鹏管晓明杜明庆于云龙李伟余志伟杨怀远孙健胡瑞
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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