Freezing and thawing cycle frozen soil shearing device capable of reducing normal pressure errors

A freeze-thaw cycle, normal pressure technology, used in the direction of using a stable shear force to test the strength of materials, measuring devices, instruments, etc.

Pending Publication Date: 2021-04-23
SHANDONG TRANSPORT VOCATIONAL COLLEGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the shear sample is subject to less restrictions, stress distribution and shear band state during the shear deformation process, its loading stability, convenience, and intuitive measurement data are insufficient, and it cannot be well passed through data collection.

Method used

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  • Freezing and thawing cycle frozen soil shearing device capable of reducing normal pressure errors
  • Freezing and thawing cycle frozen soil shearing device capable of reducing normal pressure errors
  • Freezing and thawing cycle frozen soil shearing device capable of reducing normal pressure errors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The upper shear box 1 and the lower shear box 2 all include a box body 3, one end of the box body 3 is provided with a connecting block 4, and the middle part of the box body 3 is provided with a placement groove 5, so that The bottom end of the placement groove 5 is provided with an annular groove 6, and a collar 7 connected to the annular groove 6 is arranged in the placement groove 5, and a cutter head 8 is arranged at the middle part of the collar 7, and the cutter head 8 is provided with a number of inclined slots 9, and the box body 3 is located in the middle of the placement slot 5 and is provided with a shaft hole 10 connected with the cutter head 8. Both the upper shear box 1 and the lower shear box 2 are made of stainless steel, and the connection between the upper shear box 1 and the lower shear box 2 adopts a rolling structure that ensures a gap. Both ends of the collar 7 are provided with a number of installation holes 11 , and the obliquely symmetrical end...

Embodiment 2

[0035] A shearing displacement sensor 22 matched with the shearing pushing device is arranged in the middle of the upper end of the supporting block one 18 . A horizontal load sensor 23 is arranged between the support block 2 19 and the upper shear box 1 . A normal displacement sensor 33 is arranged on one side of the upper end of the cross bar 27 , and an electric proportional valve is arranged on the rolling diaphragm cylinder 30 .

Embodiment 3

[0037] The cold bath device 16 includes a cold bath box located outside the upper shear box 1 and the lower shear box 2, a circulation pump inside the support box 13, the upper shear box 1 and the lower shear box 1. A shear circulation pipeline is arranged inside the shear box 2, and the circulation pump is connected with the shear circulation pipeline through a connecting pipe. The lower ends of the support boxes 13 are provided with several bearing blocks 34 , the number of the bearing blocks 34 is four, and the bottom ends of the bearing blocks 34 are provided with universal wheels 35 . The number of the receiving gear 47 connected to the rotating gear 48 is four, and the threaded cylinder 49 is matched with the normal plate 26 .

[0038] In order to facilitate the understanding of the above-mentioned technical solution of the present invention, the working principle or operation mode of the present invention in the actual process will be described in detail below.

[0039...

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PUM

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Abstract

The invention discloses a freezing and thawing cycle frozen soil shearing device capable of reducing normal pressure errors. The freezing and thawing cycle frozen soil shearing device comprises a supporting box; a cold bath device is arranged in the middle of the upper end of a workbench; an upper shearing box and a lower shearing box are both located in the middle of the cold bath device, and the cold bath device is internally provided with the upper shearing box and the lower shearing box; a synchronous adjusting device matched with bolt columns is arranged in a normal plate; a plurality of bearing gears matched with linkage gears are arranged at the upper ends of supporting shafts; rotating gears are arranged at the ends, away from the linkage gears, of the bearing gears, and threaded cylinders matched with the bolt columns are arranged in the middles of the rotating gears. The device has the beneficial effects of being stable and convenient in loading and visual in measurement data. A computer collects data and displays test data and curves so as to conveniently output the test data, so that synchronous height lifting is carried out on the bolt columns, the normal pressure errors are effectively reduced, and the effect of synchronous movement is achieved.

Description

technical field [0001] The invention relates to the technical field of rock-soil ring shear testing, in particular to a freeze-thaw cycle frozen soil shearing device capable of reducing normal pressure errors. Background technique [0002] The mechanical characteristics of soil and the deformation state when subjected to external force are the basic subjects in the field of rock and soil mechanics, and are also one of the most concerned conditions in geotechnical engineering construction. For this reason, people have developed a variety of instruments and equipment such as direct shear test, triaxial test, simple shear test, and ring shear test to explore the above content, and have a mechanical model based on material mechanics for analysis. The ultimate goal is to simulate as much as possible The stress-strain characteristics of the soil in actual conditions, so as to obtain its strength parameters. [0003] The direct shear test is an indoor model test for measuring the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/24
CPCG01N3/02G01N3/24
Inventor 郭聚坤魏道凯陈争王晓伟于明策杨青潮刘进朝
Owner SHANDONG TRANSPORT VOCATIONAL COLLEGE
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