A model device for testing the leakage of geomembrane composite vertical barrier and its use method and application

A model device, geomembrane technology, used in measurement devices, surface/boundary effects, permeability/surface area analysis, etc.

Active Publication Date: 2021-03-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a model device for testing the leakage of geomembrane composite vertical barriers and its use and application. Bar material, pollution liquid type, stress effect and barrier materials (including soil-bentonite vertical isolation material, soil-cement-bentonite vertical isolation material, cement-bentonite vertical isolation material or magnesium oxide activated slag bentonite vertical One of the isolation materials, or soil-bentonite vertical isolation material, soil-cement-bentonite vertical isolation material, cement-bentonite vertical isolation material or magnesium oxide activated slag bentonite vertical isolation material in parallel to The location of the central axis is sandwiched by 1-2cm thick sand layer composite structural materials) These influencing factors simulate the leakage problem of the geomembrane composite vertical barrier, and measure the flow rate of the exudate, the concentration of pollutants, the conductivity, pH value, the hydrodynamic diffusion coefficient D, the hysteresis factor R d and effective diffusion coefficient D *

Method used

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  • A model device for testing the leakage of geomembrane composite vertical barrier and its use method and application
  • A model device for testing the leakage of geomembrane composite vertical barrier and its use method and application
  • A model device for testing the leakage of geomembrane composite vertical barrier and its use method and application

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Embodiment 1

[0042] A model device for a vertical isolation engineering barrier based on a dry-wet cycle, comprising a bottom plate 1, a lower porous backing plate 8, a lower model box 2, a lower side wall 24, a geomembrane splint 3 with a geomembrane, an upper model box 4, Upper side wall 25, upper porous backing plate 9, cover plate 5; The bottom plate 1 is provided with a lower porous backing plate 8, and the bottom plate 5 is longer than the lower porous backing plate 8; The lower porous backing plate 8 is provided with a lower Model box 2, the periphery of described lower model box is provided with pad on the base plate 1, and the lower side wall 24 of equal height, the geomembrane splint 3 with geomembrane 12 is placed on the top of described lower side wall 24, and described geomembrane The membrane splint 3 is provided with an upper mold box 4, the periphery of the upper mold box 4 is provided with an upper side wall 25, and the upper part is successively arranged on the upper porou...

Embodiment 2

[0045] The above-mentioned method for using the model device for testing geomembrane composite vertical barrier leakage comprises the following steps:

[0046] Step 1, select a special-shaped plate 23, place the lower model box 2 on the special-shaped plate 23, enclose the lower model box 2 with the lower side wall 24, place a riser 22 above the lower side wall 24, and fix it with bolts 13 Connect the special-shaped plate 23, the lower side wall 24 and the riser 22; the height of the riser 22 is greater than 10 centimeters;

[0047] Step 2, the lower barrier material area 7 formed in the lower model box 2 is filled by controlling the slump, and the lower barrier material area 7 is filled with water after the filling is completed;

[0048] Step 3, place the force sensor 10 on the upper porous backing plate 9, place it on the filler in the lower barrier material area 7, then put the cover plate 5, and then connect the pipeline with the upper two-way valve 14 on the cover plate 5...

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Abstract

The invention discloses a model device for testing geomembrane composite vertical barrier leakage and a usage method and application thereof. The model device comprises an upper model box, a lower model box, a geo-membrane clamping plate, a force sensor and the like. The test device can be used for testing the seepage flow of the geomembrane composite vertical barrier and the influence of different barrier materials, pollution liquid types, vertical stress and water stop strips on the seepage flow of the geomembrane composite vertical barrier under the influence of factors such as damage and lap joint forms of the geomembrane. Meanwhile, the invention further provides a testing method of the model device for testing the geomembrane composite vertical barrier leakage. By measuring the seepage flow, the pollutant concentration, the conductivity and the pH value, the hydrodynamic dispersion coefficient, the retardation factor, the effective diffusion coefficient and the influence of different barrier materials, vertical stress and water stop strips on the seepage flow of the geomembrane composite vertical barrier are obtained, and a scientific basis is provided for the design scheme of the geomembrane composite vertical barrier.

Description

technical field [0001] The invention relates to the fields of environment and geotechnical engineering, in particular to a model device for testing the leakage of a geomembrane composite vertical barrier and its use method and application. Background technique [0002] The vertical isolation engineering barrier is an in-situ isolation technology that controls the migration of contaminated groundwater and pollutants in the soil of the contaminated site. Geomembrane composite vertical barrier is an important type of vertical isolation engineering barrier. In the construction process of geomembrane composite vertical barrier, the damage of geomembrane caused by human or accidental factors will lead to the decline of anti-seepage performance of geomembrane composite vertical barrier, and secondly, the overlapping form between geomembranes and the pollution of water stop strip material The type of liquid, etc. will also lead to the decline of the anti-seepage performance of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N13/00G01N13/04
CPCG01N13/00G01N13/04G01N15/08G01N15/0806G01N15/0826G01N2013/003G01N2015/086
Inventor 傅贤雷杜延军倪浩姜哲元
Owner SOUTHEAST UNIV
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