Spherical particle multi-point contact test device and loading method thereof

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

Active Publication Date: 2019-11-26
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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  • Spherical particle multi-point contact test device and loading method thereof
  • Spherical particle multi-point contact test device and loading method thereof
  • Spherical particle multi-point contact test device and loading method thereof

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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 based on a biaxial rheometer that can measure the force of the contact points. The test device is divided into upper and lower parts. The upper part is a single-ball restraint fixture. It is placed in four spherical constrained blocks 1 with spherical recesses and restrained by four capped bolts 2;

[0031] The lower device includes two parts, a multi-sphere restraint fixture and a measuring assembly. The multi-sphere restraint fixture is composed of two rigid baffles 4 through four parallel stud bolts 3 to fix the parallel lower spherical particles 102, the lower spherical particles 102 and The baffle pressure sensor 82 is placed between the left and right rigid baffles 4, and the displacement limiting pad 7 is placed between the lower spherical particles 102 and the baffle pressure sensor 82. The fixed rigid baffle 4 is placed on the front and back throu...

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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 loading test for coarse-grained soil particles, in particular to a multi-point contact test device for spherical particles based on a biaxial rheometer that can measure the force of the contact points and a loading method thereof. Background technique [0002] The construction of high dam reservoirs in the west is also increasing. Most of them are rockfill dams with dam heights above 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 rockfill dams has grown to 300m. level. Due to the significant increase in the height of the dam and the more complicated force conditions of the dam body, the construction safety of earth-rock dams in my country is facing new challenges. The study on the micromechanical properties, particle breaking characteristics and rheological properties of coarse-grained soils under high stre...

Claims

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Application Information

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Patent Type & Authority Applications(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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