Impervious material permeation deformation test apparatus for refuse landfill pad

Abstract

The invention discloses a device for testing the penetration and deformation of an impervious material of a gasket of a landfill site. The device comprises a pressurization device, a data control device, a testing vessel and a data processing device; the testing vessel consists of two hollow hemispheres with wing edges; the impervious material of the gasket is arranged between two hollow hemispheres; and the testing device measures pressure at two sides of geomembrane to obtain the pressure difference, provides parameters for the deformation of the geomembrane under certain pressure and can establish a pressure-deformation quantity relation. The testing device has the functions of measuring the osmotic coefficient and the deformation of the impervious material of the landfill site and also has the function of measuring the osmotic coefficients under different pressures. Data acquisition of the testing device ensures the simultaneity of the data acquisition to allow the measured osmotic coefficient to be more accurate. The osmotic coefficient measured by the testing device can be directly read and also establish relations between the pressure and the osmotic coefficient and between the pressure and the deformation quantity; therefore, the device provides more reliable evidence for the engineering application and the estimation of imperviousness of the geomembrane.

Description

technical field [0001] The invention discloses a seepage deformation test device for liner anti-seepage material of garbage landfill site, which belongs to the category of testing instruments. Background technique [0002] Garbage is increasing day by day, the rate of innocuous treatment is low, and environmental pollution is serious, which has become a bottleneck restricting the sustainable development of my country's landfill and even the entire national economy. In recent years, the annual growth rate of municipal solid waste is 8%-10%. Sanitary landfill has become the main form of waste disposal in my country as a way of low cost, relatively simple technology, and rapid disposal of waste. In order to prevent landfill leachate from polluting the soil and groundwater surrounding the landfill, a liner system is usually built at the bottom and four sides of the landfill. In recent years, the composite anti-seepage liner system composed of HDPE geomembrane and geosynthetic ...

AI Technical Summary

Problems solved by technology

Since the garbage dump in the landfill will generate relatively large compressive and shear stresses on the liner, HDPE geomembrane and GCL are likely to produce relatively large deformation under the action of pressure and shear force, which will cause damage to the liner

At present, the research on liner anti-seepage mainly focuses on horizontal anti-seepage, and the liner of landfill also has the problem of lateral leakage.

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