Test apparatus for studying the relationship between force and deformation during frost heaving of soil body

A test equipment and frost heave technology, applied in the direction of material thermal expansion coefficient, measuring device, instrument, etc., can solve the problem of inconsistent research direction, unable to better monitor the synchronous change of frost heave amount and frost heave force, and the test equipment cannot be installed and other problems, to achieve the effect of light weight, small error, convenient and safe installation

Active Publication Date: 2018-09-11
NORTHWEST INST OF ECO-ENVIRONMENT & RESOURCES CAS
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AI Technical Summary

Problems solved by technology

In addition to the above-mentioned studies, there are many related studies on frost heave tests on soil or other media, and the research directions are different. relatively few reports
[0004] In the existing rock and soil frost heave test equipment, especially the frost heave test based on the freeze-thaw cycle test machine, due to the limitation of the structure of the test box, some larger test equipment cannot be installed, and the existing test equipment functions Roughly divided into two categories, one is to monitor the change of frost heave force by controlling the amount of frost heave deformation, and the other is to monitor the development of frost heave amount by controlling the amount of frost heave force, but neither can monitor the frost heave process well Synchronous change of medium frost heave amount and frost heave force

Method used

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  • Test apparatus for studying the relationship between force and deformation during frost heaving of soil body
  • Test apparatus for studying the relationship between force and deformation during frost heaving of soil body
  • Test apparatus for studying the relationship between force and deformation during frost heaving of soil body

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Embodiment Construction

[0027] Such as Figure 1~7 As shown, a set of test equipment is used to study the relationship between force and deformation in the process of soil frost heaving. Bearing system6.

[0028] The upper carrying system 1 includes a carrying column 13 and a peg I14 placed on the upper tray 16; the interior of the carrying column 13 is hollowed out as a limit hole 12, and its upper end is provided with an upper carrying column external thread 11, and its lower end is provided with a peg I14. I14 matches the keyhole I15. The external thread 11 of the upper bearing column is matched with the reserved hole on the upper part of the pressure freeze-thaw test machine. The components are all made of high-strength, corrosion-resistant and wear-resistant alloy steel.

[0029] The spring restraint 2 comprises a spacer post 22 placed at the center of the bottom tray 25, a spring spacer ring 27 sleeved on the spacer post 22, and a spring 26 sleeved on the spring spacer ring 27; the upper end...

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Abstract

The present invention relates to a test apparatus for studying the relationship between force and deformation during frost heaving of a soil body. The apparatus comprises an upper load bearing system,a spring restraint, a pressure system, a test tank, a refrigeration system and a lower load bearing system connected together. According to the invention, the synchronous change of the frost heavingdeformation and the frost heaving force during the frost heaving process of the soil body can be greatly monitored, and components can be detachably combined. The apparatus is convenient and safe to install, is simple to operated, is small in size, and has good stability and high measurement precision.

Description

technical field [0001] The invention relates to indoor geotechnical test equipment, in particular to a set of test equipment for studying the relationship between force and deformation in the process of frost heaving of soil. Background technique [0002] Since the 1980s, with the rapid development of various monitoring methods, the experimental research technology of frozen soil has also undergone tremendous improvement. In recent years, the research on the mechanism of frost heave has been a focus of the field of permafrost research. Scientists from many countries have also conducted a large number of experimental studies and accumulated a large amount of frost heave test data on various soils. At the same time, they have also established The relationship between frost heave and various physical parameters of many soils (Li Ping et al. Research status and progress of frozen margin and frost heave models[J]. Glaciology and Geocryology, 2000, 22(1): 90-95.) . At the same t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/16G01N25/14
CPCG01N25/14G01N25/16
Inventor 黄龙盛煜
Owner NORTHWEST INST OF ECO-ENVIRONMENT & RESOURCES CAS
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