Vertical variable shear force type direct shear creepmeter

A creep meter, vertical technology, applied in the field of geotechnical laboratory test, can solve the problem that the shear stress cannot be kept constant, the loss of axial pressure, etc., to achieve the effect of ensuring the shear stress, reducing the shear force, and ensuring constant and constant

Pending Publication Date: 2020-11-17
CCCC FOURTH HARBOR ENG INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art, to provide an improved direct shear test creep instrument, which can overcome the defects of the prior art that the axial pressure loss and the shear stress cannot be kept constant during the test

Method used

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  • Vertical variable shear force type direct shear creepmeter
  • Vertical variable shear force type direct shear creepmeter
  • Vertical variable shear force type direct shear creepmeter

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Embodiment Construction

[0031] The following are merely examples of implementation of the present invention, and should not limit the scope of the present invention. That is to say, all non-substantial changes and modifications made according to the patent scope of the present invention should still fall within the scope covered by the patent of the present invention.

[0032] Such as figure 1 Shown is the vertical variable shear type direct shear creep meter of the present invention, which includes an instrument table 108, a shear box, a dial gauge 102 and a pressurization system.

[0033] An upright baffle 101 is provided on the instrument table 108 table, and the position of the table near the upright baffle has a perforation that runs through up and down. The instrument table table is supported by four legs, keeps level, and is perpendicular to the described upright baffle. The dial of the dial indicator 102 is fixed on the upright baffle, and the spring contact head of the dial indicator is in ...

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Abstract

The invention provides a vertical variable shear force type direct shear creepmeter which comprises an instrument table, a shear box, a dial indicator and a pressurization system; the shear box is composed of a first box body and a second box body, and the second box body slides downwards relative to the first box body under the action of gravity and a second weight set; the pressurizing system comprises a horizontal axial pressure weight system and a vertical shearing force weight system; the horizontal axial pressure weight system comprises a first weight group; the vertical shearing force weight system comprises a second weight set, the second weight set is placed in a weight container, the weight container is placed in a liquid container, and the bottom of the liquid container is communicated with a plurality of stress control containers in series through pipelines. Cut-off and communication mechanisms are arranged between the adjacent stress control containers and between the liquid container and the stress control containers. According to the invention, the loss of a force value of a traditional direct shear apparatus for converting vertical gravity into horizontal shear force can be avoided, and the shear stress of a soil sample in the shearing process can be controlled to be constant.

Description

technical field [0001] The invention relates to the technical field of geotechnical laboratory tests. Background technique [0002] The direct shear creep test refers to a test in which a soil sample is sheared on a specific surface, the shear stress is kept constant, and the shear displacement is measured as a function of time. The current direct shear creep meter adopts the basic force mode of applying axial pressure vertically and shearing horizontally. The weight is hooked through the pulley to convert the vertical gravity into horizontal force to provide shear force for the sample. Since the shear force is usually much larger than the axial pressure, there will be a certain loss after the pulley changes the direction of the force, and the actual shear force needs to be tested through the steel ring. [0003] In addition, the commonly used direct shear creep tester is to study the creep properties of soil by applying a weight on a specific shear plane to test the change...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G01N3/02
CPCG01N3/02G01N3/24G01N2203/0003G01N2203/0025G01N2203/0071G01N2203/0202
Inventor 滕超王卫谢仁红刘志军
Owner CCCC FOURTH HARBOR ENG INST
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