Device and method for measuring Poisson's ratio of bulk materials in refuse dump
A technology for bulk materials and measuring devices, which is applied in the field of mining engineering and geotechnical engineering tests, can solve the problems of low measurement accuracy, inability to fully contact soil particles on the surface of the miniature earth pressure gauge, and inability to truly reflect lateral stress, etc., to achieve measurement The effect of high accuracy
Active Publication Date: 2021-01-29
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] Such as 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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The invention discloses a device and method for measuring the Poisson's ratio of bulk materials in a refuse dump, and the device comprises a bulk sample side limiting box of a cylindrical structure, an axial pressurization oil cylinder, and a pressure sensor. A plurality of horizontal seams and vertical seams are uniformly formed in the wall surface of the bulk sample side limiting box in the circumferential direction. A horizontal thin metal sheet corresponding to the horizontal seams is arranged in the discrete sample on the inner side of the horizontal seams in the horizontal direction, a vertical thin metal sheet corresponding to the vertical seams is arranged in the discrete sample on the inner side of the vertical seam in the vertical direction, and the horizontal thin metal sheet and the vertical thin metal sheet are connected with the first drawing gasket and the second drawing gasket respectively; the drawing instrument is arranged on the drawing instrument support and can bedrawn outwards in the radial direction of the bulk sample side limiting box so that the horizontal thin metal sheet or the vertical thin metal sheet can be pulled out of the horizontal seam or the vertical seam. The method can truly reflect the side stress of the bulk material, is high in Poisson's ratio measurement accuracy, and is more economical, simpler and more 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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Login to View More 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