A function-stacked ring for measuring non-synchronous torsional deformation of multi-layered thin materials along the axial direction
An asynchronous and functional technology, applied in the direction of applying stable shear force to test the strength of materials, measuring devices, and analyzing materials, etc., can solve the problems of inability to measure shear displacement in real time, the existence of soft substrates, and thin thickness of geosynthetics And other issues
Active Publication Date: 2021-09-28
HOHAI UNIV
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Problems solved by technology
But so far, the existing torsional shear instrument is only used to study the shear characteristics between two layers of materials, or when studying the interface shear characteristics of multi-layer geosynthetics, it is impossible to measure the multi-layer geosynthetics in real time. The lack of shear displacement of each layer in the sample is mainly due to the thin thickness of geosynthetics and the presence of soft substrates.
Therefore, the test to study the shear characteristics of multi-layer geosynthetics composite liner is still under exploration.
Method used
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[0020] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0021] Such as Figure 1 to Figure 6 As shown, a function lamination ring for measuring asynchronous torsional deformation of multi-layer thin body materials in the axial direction includes a function lamination ring 1, a displacement sensor 2, a fixing bracket 3 and a mounting table 4, and the function lamination ring 1 is arranged on the installation Above the platform 4, each layer of stacking rings is fixedly connected to the sample, and can be axially displaced relative to the mounting platform 4. The fixed bracket 3 is fixed on the mounting platform 4, and the functional stacking ring 1 is stacked by several stacking rings. Its outer wall is connected to the displacement sensor 2 in non-rigid contact, and the displacement sensor 2 is fixedly...
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The invention discloses a function stacking ring for measuring asynchronous axial torsional deformation of multi-layer thin body materials, relates to the technical field of geotechnical ring shear testing, and relates to a function stacking ring with a groove track and a high-sensitivity linear displacement sensor , Adjustable linear displacement sensor fixing bracket and mounting table. The outer edge of the stacked ring adopts an elliptical shape with a function formula, which is in contact with the high-sensitivity linear displacement sensor through the groove on the outer wall, and the real-time torsion angle of each stacked ring can be indirectly calculated through the ellipse formula and the high-sensitivity linear displacement sensor. The device of the invention solves the problem that the torsional shear instrument cannot measure the shear displacement of each layer in the multi-layer geosynthetic material sample in real time in the current interface shear test, and has the advantages of easy processing, good feasibility and low production cost; the device The principle can be applied to the design of any plate (including cloth) material interface friction test instrument (including large torsional shear instrument), which opens up a new design idea for it.
Description
technical field [0001] The invention relates to the technical field of geotechnical ring shear testing, in particular to a function stacking ring for measuring the asynchronous torsional deformation of multilayer thin body materials along the axial direction. Background technique: [0002] The ever-increasing output of urban solid waste and the accumulation of waste to be treated urgently are difficult problems that must be solved in urban construction and development. Sanitary landfill is the main treatment method at present in our country, and it is also an indispensable final treatment method for garbage treatment. As a hydraulic barrier, the liner system is the most important part of the landfill. It is laid on the bottom and four sides of the landfill. Its function is to isolate solid waste from affecting the soil and groundwater around the landfill. pollute. [0003] The liner system is composed of multi-layer geosynthetic materials, namely geomembrane, geotextile, g...
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IPC IPC(8): G01N3/24G01N3/26G01N3/02
CPCG01N3/02G01N3/24G01N3/26G01N2203/0025
Inventor 刘占磊施建勇艾英钵
Owner HOHAI UNIV