Device and method for measuring Poisson's ratio of bulk material in dump site
A technology of bulk material and measuring device, applied in the field of mining engineering and geotechnical engineering test, can solve the problems of low measurement accuracy, uneven force, inability to measure, etc., to achieve high measurement accuracy, large force area, Test the effect of convenience
Active Publication Date: 2021-08-10
CENT SOUTH UNIV
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Problems solved by technology
When the side-mounted miniature soil pressure gauge of this patent is used to measure the lateral stress of the bulk material in the dump site, due to the different shapes of the soil particles of the bulk material and the existence of gaps between the soil particles, the surface of the miniature soil pressure gauge cannot fully contact the soil particles. , the limited part of the force produces uneven force and cannot truly reflect the lateral stress of the bulk material, resulting in the disadvantages of low measurement accuracy or even impossible measurement of the Poisson's ratio measurement of the bulk material in the dump site. Poisson's ratio of bulk materials in reaction dump
Therefore, this patent is not suitable for measuring Poisson's ratio of bulk materials in dump sites
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[0029] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.
[0030] Unless otherwise defined, all technical terms used hereinafter have the same meanings as commonly understood by those skilled in the art. The terminology used herein is only for the purpose of describing specific embodiments, and is not intended to limit the protection scope of the present invention.
[0031] like figure 1 , 2 As shown, the measuring device for the Poisson's ratio of the bulk material in the dump site of this embodiment includes a base 6, a reaction force frame 7, an axial pressurized oil cylinder 1, a bulk sample side limit box 5, a thin iron sheet, a pressure Sensor 8, drawing instrument 15 and drawing instrument bracket, guide rail 17.
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Abstract
The invention discloses a device and method for measuring the Poisson's ratio of bulk materials in a dump site, which comprises a bulk sample lateral limit box with a cylindrical structure, an axially pressurized oil cylinder, and a pressure sensor. A number of horizontal and vertical seams are evenly opened on the wall of the confining box along the circumference, and horizontal thin metal sheets corresponding to the horizontal seams are arranged in the bulk sample inside the horizontal seams along the horizontal direction. A vertical thin metal sheet corresponding to the vertical slit is arranged in the sample along the vertical direction, and the horizontal thin metal sheet and the vertical thin metal sheet are respectively connected with the first pull-out gasket and the second pull-out gasket; The instrument is arranged on the support of the puller, and the puller can be pulled radially outward toward the bulk sample confinement box to pull out the horizontal thin metal sheet or the vertical thin metal sheet from the horizontal seam or the vertical seam. The invention can truly reflect the lateral stress of bulk materials, has high Poisson's ratio measurement accuracy, and has the advantages of being more economical, simple and accurate.
Description
technical field [0001] The invention belongs to the technical field of mining engineering and geotechnical engineering tests, and relates to a device and method for measuring the Poisson's ratio of bulk materials in a dump. Background technique [0002] The Poisson's ratio of the bulk material in the dump is a coefficient reflecting the lateral deformation of the bulk material, and it is also one of the essential parameters in the design, calculation and numerical simulation of the geotechnical engineering of the dump; It has the characteristics of large difference in soil particle size, high degree of inhomogeneity, complex mechanical properties of coarse-grained soil, and obvious particle size classification law in height; in order to obtain the Poisson's ratio parameter of coarse-grained soil, it is often carried out by indoor triaxial compression instrument However, the axial deformation measured by the external displacement sensor of the traditional triaxial tester is l...
Claims
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IPC IPC(8): G01N3/08G01N3/06G01N3/02G01N19/02
CPCG01N3/02G01N3/06G01N3/08G01N19/02G01N2203/0017G01N2203/06
Inventor 谢学斌刘涛过江高山王小平姜伟
Owner CENT SOUTH UNIV