Test method and device for judging defect leakage stability of geomembrane anti-seepage earth and rockfill dam

A test method and technology of geomembrane, applied in the measurement device, by detecting the appearance of fluid at the leakage point, permeability/surface area analysis, etc., can solve the problem that the influence range of defect leakage cannot be obtained, and the leakage range of the cushion layer is not considered Influence, geomembrane defect leakage influence range research and other issues

Active Publication Date: 2020-11-06
HOHAI UNIV
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Problems solved by technology

[0005] 1. Existing geomembrane defect leakage tests or numerical simulations mainly investigate the amount of defect leakage, but have not studied the influence range of geomembrane defect leakage on the actual engineering dam surface, and cannot obtain the influence range of defect leakage
[0006] 2. The existing technology does not consider the impact of cushions with different water contents on the leakage range of geomembrane defects, which is far from the actual situation of the project

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  • Test method and device for judging defect leakage stability of geomembrane anti-seepage earth and rockfill dam
  • Test method and device for judging defect leakage stability of geomembrane anti-seepage earth and rockfill dam
  • Test method and device for judging defect leakage stability of geomembrane anti-seepage earth and rockfill dam

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Embodiment Construction

[0077] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0078] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "left side", "right side", "upper", "lower" are based on the orientations or positional relationships shown in the accompanying drawings, and are only For the purpose of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, "first", "second" and the like do not represent components importance, and therefore should not be construed as limiting the invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present in...

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Abstract

The invention discloses a test method and device for judging the defect leakage stability of a geomembrane anti-seepage earth and rockfill dam. The device comprises a model water tank, a geomembrane anti-seepage model dam, a water level control device and a defect leakage measuring system. The inclination angle of a dam body left side plate of the model water tank is adjustable, so that differentbank-slope ratios can be simulated; the defect leakage measurement system comprises a high-speed camera and a computer. According to the invention, the diameter of a geomembrane defect leakage infiltration area is obtained by carrying out defect leakage tests on cushion geomembranes with different water contents, a mathematical model of geomembrane anti-seepage earth and rockfill dam defect leakage stability is established, and judgment of the geomembrane anti-seepage earth and rockfill dam defect leakage stability of the cushion geomembranes with different water contents in actual engineeringis obtained. The method and the device have important scientific research significance and engineering application value for guiding the construction of the geomembrane.

Description

technical field [0001] The invention relates to the detection field of geomembranes in water conservancy projects, in particular to a test method and a device for judging the leakage stability of geomembrane anti-seepage earth-rock dam defects. Background technique [0002] As an emerging anti-seepage material, geomembrane has an extremely low permeability coefficient, generally 1.0×10 -11 ~1.0×10 -13 cm / s, so it has been widely used in anti-seepage projects such as earth-rock dams, dikes, cofferdams, reservoir basins, reservoirs, channels, and landfills. The thickness of the geomembrane used in the project is mostly 0.5-2mm. Since the geomembrane is a flexible film material, it is almost inevitable that the geomembrane will be damaged or defective during production, transportation and construction. Engineering practice shows that the leakage caused by geomembrane defects will reduce the performance of the geomembrane anti-seepage system, increase the seepage rate, and ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N13/00G01M3/20
CPCG01M3/20G01N13/00G01N15/08
Inventor 盛希璇岑威钧马泽锴都旭煌
Owner HOHAI UNIV
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