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A detection method for damage and leakage of anti-seepage layer in landfill

A detection method and technology of anti-seepage layer, which can be applied in the direction of detecting the appearance of fluid at the leakage point and using liquid/vacuum degree for liquid tightness measurement, etc., which can solve the problems of inaccurate positioning and leakage judgment of the leakage point of the anti-seepage layer. , to avoid missed judgments or even misjudgment of missing points, improve accuracy, and reduce engineering losses

Active Publication Date: 2017-09-05
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for detecting leakage of the anti-seepage layer in landfill, which solves or partially solves the technical problems in the prior art that the leak point of the anti-seepage layer is inaccurately located, and the leakage point is missed or even misjudged. , realized that the detection method can be used to detect leaks of anti-seepage membranes with covering layers less than 0.5m, can significantly improve the accuracy of high-density polyethylene geomembrane leakage detection, and reduce engineering losses caused by misjudgments and missed judgments Effect

Method used

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  • A detection method for damage and leakage of anti-seepage layer in landfill
  • A detection method for damage and leakage of anti-seepage layer in landfill
  • A detection method for damage and leakage of anti-seepage layer in landfill

Examples

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Effect test

Embodiment 1

[0048] Use this detection method to accurately locate the leakage point of the high-density polyethylene geomembrane under the pebble cover layer:

[0049] Divide the detection area into several square sub-regions with a side length of 32m, and each sub-region is divided into sub-regions. With the center of the sub-region as the centroid, draw the first area 1 and 8m of the square side length 4m one by one with lime powder The second zone 2, the third zone 3 of 16m, the fourth zone 4 of 32m, with the centroid as the starting point, first draw 8 first detection lines 6 whose adjacent included angles are 45 °, the second zone 2, Each side of the third area 3 and the fourth area 4 is divided into eight sections by the first detection line 6, and the midpoints of the corresponding sections are connected to form the second detection line 7. At this time, each side of the third area 3 and the fourth area 4 The side is divided into 16 segments by the connecting line, and the midpoint...

Embodiment 2

[0052] Use this detection method to accurately locate the leakage point of the high-density polyethylene geomembrane under the clay cover layer:

[0053] Divide the detection area into several square sub-regions with a side length of 64m, and each sub-region is divided into sub-regions, with the center of the sub-region as the centroid, draw the first area 1 and 8m of the square side length 4m one by one with lime powder The second zone 2 of 16m, the third zone 3 of 16m, the fourth zone 4 of 32m and the fifth zone 5 of 64m, starting from the centroid, first draw 8 first detection lines with adjacent angles of 45° 6. The sides of the second area 2, the third area 3, the fourth area 4 and the fifth area 5 are divided into eight segments by the first detection line 6, and the midpoints of the corresponding segments are connected to form the second detection line 7, which Each side of the third zone 3, the fourth zone 4 and the fifth zone 5 is divided into 16 sections by connectin...

Embodiment 3

[0056] Use this detection method to accurately locate the leakage point of the high-density polyethylene geomembrane under the gravel cover layer:

[0057] Divide the detection area into several square sub-regions with a side length of 48m, each sub-region is divided into sub-regions, and the center of the sub-region is used as the centroid, and the first area 1 and 6m with a circle diameter of 3m are drawn one by one with lime powder The second zone 2 of 12m, the third zone 3 of 12m, the fourth zone 4 of 24m and the fifth zone 5 of 48m, with the center of the circle as the starting point, first draw 8 first detection lines 6 with adjacent angles of 45° , the sides of the second area 2, the third area 3, the fourth area 4 and the fifth area 5 are divided into eight sections by the first detection line 6, and the midpoints of the corresponding sections are connected to form the second detection line 7. The sides of the third district 3, the fourth district 4 and the fifth distr...

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Abstract

The invention relates to a method for detecting the damage and the leakage of an anti-leakage layer of a burial field, and belongs to the technical field of environment geotechnical engineering. The detection method comprises the following steps: a detection region is divided into a plurality of separated regions through labeling objects, and each separated region is divided into a plurality of sub-regions; each sub-region comprises a plurality of concentric circles with different diameters, or a plurality of squares with different side lengths and coincident centers of the squares; a plurality of detection lines led from the centers of the squares of a plurality of separated regions are respectively demarcated by the labeling articles, so that the condition that the largest space between every two adjacent detection lines is not greater than 2 m is ensured; a membrane bottom electrode is arranged under the anti-leakage layer, and a membrane top electrode is arranged on the anti-leakage layer; the membrane bottom electrode is connected with a negative pole of a high-voltage generator; the membrane top electrode is connected with a positive pole of the high-voltage generator; water is sprinkled on the surface of a cover layer, the high-voltage generator is switched on, and the voltage of the high-voltage generator is regulated to a set voltage; a bidirectional dipole is used for successive detection along each detection line. The detection method can obviously improve the precision of detecting the leakage of a high-density polyethylene geomembrane, and reduce the project loss caused by erroneous judgment and missing judgment.

Description

technical field [0001] The invention relates to the technical field of environmental geotechnical engineering, in particular to a method for detecting damage and leakage of an anti-seepage layer in a landfill. Background technique [0002] High-density polyethylene geomembrane has good anti-seepage performance, and has the characteristics of stable chemical properties, high insulation, high tensile strength, good anti-aging performance, convenient construction, low cost and high benefit, and is widely used in landfill prevention. seepage, breeding anti-seepage, oil tank anti-seepage, basement anti-seepage, artificial lake anti-seepage and other fields. [0003] As modern cities have higher and higher requirements for environmental protection, the anti-seepage system composed of high-density polyethylene geomembrane, as the first barrier to prevent the diffusion of pollutants, has received more and more attention. However, as a concealed project, the anti-seepage system is o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/16
Inventor 薛强肖凯刘磊刘凯陈亿军
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI