A temperature-controllable geomembrane-soil contact surface shear test device and test method

A technology of shear test and geomembrane, which is applied in the direction of applying stable shear force to test the strength of materials, measuring devices, instruments, etc., which can solve the problem of not considering the influence of geomembrane shear characteristics and the inability to test the mechanics of geomembrane contact surface Index change rules and other issues, to achieve the effect of convenient operation

Active Publication Date: 2019-04-19
HOHAI UNIV
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Problems solved by technology

However, the existing direct shear instrument does not consider the influence of the test temperature of the geomembrane on the shear characteristics of the contact surface, and cannot test the mechanical index and its change law of the contact surface of the geomembrane at different temperatures.

Method used

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  • A temperature-controllable geomembrane-soil contact surface shear test device and test method
  • A temperature-controllable geomembrane-soil contact surface shear test device and test method
  • A temperature-controllable geomembrane-soil contact surface shear test device and test method

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] Such as figure 1As shown, a temperature-controllable geomembrane-soil contact surface shear test device includes a rigid base plate 1, a reaction frame 2 is fixed on the rigid base plate, and the rigid base plate located in the reaction frame is sequentially from bottom to top. Set the lower shear box 3 and the upper shear box 5, the two ends of the upper shear box in the shear direction are horizontally constrained on the reaction frame, the upper shear box is filled with soil samples, and the surface of the lower shear box is laid with geomembrane and used The geomembrane fixture 9 is fixed; the force transmission plate 6 is placed on the surface of the upper shear box soil sample, the top of the force transmission plate is provided with a normal loading device 19, the normal pressure sensor 21 is fixed on the normal loading device 19, and th...

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Abstract

The invention discloses a method for a shearing testing apparatus of a contact surface of a geomembrane and soil with controlled temperature and a testing method thereof According to the invention, awater-bath pipeline is arranged in a lower shearing box, water temperature can be adjusted on the water-bath pipeline by a water temperature regulating tank, the geomembrane is positioned under different test temperatures, temperature change of the usage environment of the geomembrane can be simulated, and the testing for the shearing intensity of the contact surface of the geomembrane and the soil under different temperatures is realized; according to the testing method, a change curve of the shearing intensity of the contact surface of the geomembrane and the soil with shear displacement under same normal stress and different ambient temperatures can be measured, a change curve of the shearing intensity of the contact surface of the geomembrane and the soil with shear displacement underdifferent normal stress and different ambient temperatures can be measured, and the difference of the shearing intensity of the contact surface of the geomembrane and the soil is obtained. During testing, the temperature setting, loading applying, shearing displacement and shearing rate setting, and data acquisition are completed by arrangement of a computer, and the operation is convenient and easy to carry out.

Description

technical field [0001] The invention relates to the technical field of manufacturing shear test equipment for a geomembrane-soil contact surface, in particular to a temperature-controllable geomembrane-soil contact surface shear test device and a test method. Background technique [0002] Geomembrane has been widely used in anti-seepage projects such as dams, warehouses, channels, and landfills because of its good anti-seepage performance, strong adaptability to deformation, low project cost and fast construction speed. Among them, the shear strength of the contact surface between the geomembrane and the underlying layer or the upper protective layer is an important indicator of engineering design, which is directly related to the anti-sliding stability of the geomembrane or the upper protective layer. my country has a vast geography, and the temperature difference between winter and summer or day and night is large in the area where some geomembrane anti-seepage projects ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0025G01N2203/0222G01N2203/0682
Inventor 岑威钧都旭煌王辉李邓军耿利彦陈司宁罗佳瑞
Owner HOHAI UNIV
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