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A spherical particle multi-point contact test device and its loading method

A spherical particle, test device technology, applied in measuring device, using stable tension/pressure test material strength, instrument, etc., can solve the problem of inability to meet the needs of use, achieve simple operation, accurate test results, repeatability high effect

Active Publication Date: 2020-08-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The previous tests on using rock materials instead of coarse-grained soil were mostly single-point contact tests between two balls, but under actual engineering conditions, coarse-grained soil interacts with multiple points of contact, and single-point contact fixtures cannot meet the requirements of multi-point contact. Conditions of use

Method used

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  • A spherical particle multi-point contact test device and its loading method
  • A spherical particle multi-point contact test device and its loading method
  • A spherical particle multi-point contact test device and its loading method

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Embodiment

[0030] Such as Figure 1-4 As shown, the present invention provides a multi-point contact test device for spherical particles that can measure the contact point force based on a biaxial rheometer. The test device is divided into upper and lower parts, and the upper part is a single-ball restraint fixture. Placed in four spherical confinement blocks 1 with spherical depressions and constrained by four cap bolts 2;

[0031] The lower device includes two parts: a multi-sphere restraint fixture and a measuring assembly, wherein the multi-sphere restraint fixture is fixed by two rigid baffles 4 through four parallel stud bolts 3 to fix the parallel lower spherical particles 102, the lower spherical particles 102 and A baffle pressure sensor 82 is placed between the left and right rigid baffles 4, a limited displacement spacer 7 is placed between the lower spherical particle 102 and the baffle pressure sensor 82, and the fixed rigid baffle 4 is placed on the front and rear with the ...

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Abstract

The invention relates to a spherical particle multi-point contact test device for detecting the contact force of spherical particles. The device includes a single-sphere restraining clamp, a multi-sphere restraining clamp arranged below the single-sphere restraining clamp, and a measuring assembly arranged at the multi-sphere restraining clamp. Testing spherical particles are arranged between thesingle-sphere restraining clamp and the multi-sphere restraining clamp. Compared with the prior art, the spherical particle multi-point contact test device has the following advantages: the multi-point contact operation of coarse-grained soil particles is realized; and testing of spheres with different particle diameters can be realized by measuring the calculated contact force and the flexibilityof the instrument.

Description

technical field [0001] The invention relates to the field of multi-point contact crushing and loading tests of coarse-grained soil particles, in particular to a spherical particle multi-point contact test device and a loading method based on a biaxial rheometer capable of measuring contact point forces. Background technique [0002] More and more high-dam reservoirs are being built in the west, and most of them are rock-fill dams with a height of more than 150m. In the next 10 years, more than 40 super-large hydropower stations will be built in the western region, and the height of the rock-fill dams has grown to 300m. class. Due to the significant increase in dam height, the stress conditions of the dam body are more complex, and the construction safety of earth-rock dams in my country is facing new challenges. The research on the mesomechanical properties, particle breakage characteristics and rheological properties of coarse-grained soils under high stress is urgently ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04G01N3/08
CPCG01N3/04G01N3/08G01N2203/0254
Inventor 李琳牛奕然赵程周健缪烽民柴嘉辉于仕才张艳伟
Owner TONGJI UNIV
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