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Sand abradability test experimental device and calibration experiment method of sand abrasion coefficient

A technology for testing experiments and wear coefficients, which is applied in the field of shield tunneling engineering simulation testing experiments

Inactive Publication Date: 2018-10-12
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of sand that can study the wear law and influence effect of sand with different water content and sand with different particle gradation on the shield tool material, and can accurately calibrate the corresponding wear coefficient of the sand for the experiment. Soil abrasiveness testing experimental device and calibration experimental method of sandy soil wear coefficient to solve the technical problems in the above-mentioned background technology

Method used

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  • Sand abradability test experimental device and calibration experiment method of sand abrasion coefficient
  • Sand abradability test experimental device and calibration experiment method of sand abrasion coefficient
  • Sand abradability test experimental device and calibration experiment method of sand abrasion coefficient

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Embodiment 1

[0035] Such as figure 1 As shown, Embodiment 1 of the present invention provides an experimental device for testing the abrasiveness of sand and soil. The device includes a soil bearing cylinder, a driving mechanism, an abrasion mechanism, a loading mechanism, and a servo control device 1. The soil bearing cylinder is used for Containing sand and soil 2, the driving mechanism is arranged above the soil bearing cylinder, and is used to drive the abrasive mechanism to rotate relative to the sand and soil in the soil bearing cylinder; the loading mechanism is used for The abrasive mechanism provides an abrasive loading force so that when the abrasive mechanism and the sand rotate relative to each other, the sand will erode the abrasive mechanism; the servo control device is electrically connected to the drive mechanism and is used to control the drive mechanism. mechanism provides different rotational speeds for the abrasive mechanism.

[0036] Put sand 2 into the soil bearing c...

Embodiment 2

[0052] Embodiment 2 of the present invention provides an experimental method for calibrating the wear coefficient of sand and soil, the method comprising the following steps:

[0053] Use the sand and soil abrasive test experimental device to carry out the sand and soil abrasive test experiment;

[0054] Wherein, the servo motor 7 is controlled by the servo control device 1 to change the rotating speed of the rotating disk 9, and the normal loading force of the rotating disk 9 is adjusted by replacing the weight disk 12 with different weights. Multiple sets of wear amount data within a certain period of time, draw the characteristic curve of the wear amount of the tapered nail with the rotation speed of the rotating disc and the normal loading force on the rotating disc;

[0055] Utilize discrete element simulation software to simulate the abrasiveness test experiment of sandy soil;

[0056] Wherein, by adjusting the wear coefficient in the discrete element simulation softwar...

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Abstract

The invention discloses a sand abradability test experimental device and a calibration experiment method of a sand abrasion coefficient. The device comprises a soil body bearing barrel, a driving mechanism, an abrasion mechanism, a loading mechanism and a servo control device, wherein the driving mechanism is controlled by the servo control device to supply different revolving speeds for the abrasion mechanism, loading force is supplied for the abrasion mechanism through the loading mechanism, so that sand in the soil body bearing barrel is used for abrading the abrasion mechanism, and the abrasion loss data is measured. The device can be used for researching the abrasion law and influence effect of sand, which has different water contents and different grain gradations, on a shield cuttermaterial; the cutter abrasion loss at different revolving speeds and bearing pressure can be measured to draw an abrasive characteristic curve, by adjusting an abrasion coefficient in discrete element simulation software, the abrasive tests under different conditions can be simulated to obtain the same characteristic curves, the corresponding abrasion coefficient of the sand for experiments to acutter can be accurately calibrated, and necessary data can be provided for subsequent discrete elements for emulating, simulating and researching shield cutter abrasion.

Description

technical field [0001] The invention relates to the technical field of shield tunneling engineering simulation test experiments, in particular to an experimental device for testing the abrasiveness of sand and soil and an experimental method for calibrating the abrasion coefficient of sand and soil. Background technique [0002] Using the shield method to construct underground tunnels can take into account the requirements of construction safety, excavation speed, adaptability to complex strata, and surface settlement control. It has become the main construction method for the construction of urban subway tunnels in my country. However, the shield tunneling method cannot avoid the wear of the construction tool by the soil. The wear of the tool reduces the construction efficiency, affects the construction quality, and increases the construction cost. In the research process of shield tool wear, how to measure and evaluate the wear and law of the tool under the corresponding s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56
CPCG01N3/565
Inventor 李兴高牟举文袁大军许宇杨益苏伟林曹影峰李瀚源
Owner BEIJING JIAOTONG UNIV
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