Function overlapping rings for measuring non-synchronous torsional deformation of multilayer thin body material along axial direction
A non-synchronized, functional technology, applied in the direction of using a stable shear force to test the strength of materials, measuring devices, analyzing materials, etc., can solve the problem that the shear displacement cannot be measured in real time, the thickness of geosynthetics is thin, and the existence of soft substrates And other issues
Active Publication Date: 2019-03-08
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.
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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] like 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 co...
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The invention discloses function overlapping rings for measuring non-synchronous torsional deformation of a multilayer thin body material along an axial direction, relates to the technical field of rock and soil ring shear testing. The overlapping rings comprise function overlapping rings with groove tracks, high-sensitivity linear displacement sensors, adjustable linear displacement sensor fixingsupports and an mounting table, wherein the outer edges of the overlapping rings adopt elliptic shapes with a functional formula, the rings are contacted with the high-sensitivity linear displacementsensors through grooves on the outer walls, and the real-time torsion angle of each layer of the overlapping ring can be indirectly calculated through the elliptic formula and the high-sensitivity linear displacement sensors. The device solves the defect that a torsional shear instrument cannot measure the shear displacement of each layer of a multi-layer geosynthetic material sample in real timein the current interface shear test, and has the advantages of easy processing, good feasibility and low manufacturing cost. The principle of the device can be applied to the design of any plate (including cloth) material interface friction test instrument (including large torsional shear instrument), so that the device opens up a new design idea.
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. Pollution. [0003] The liner system is composed of multi-layer geosynthetic materials, namely geomembrane, geotextile,...
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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