Effect of effective overburden pressure on geomembrane/soil interface transmissivity

Chai, Jinchun; Hayashi, Shigenori; Khalili, Nasser

doi:10.1680/gein.2008.15.1.31

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…Although the leakage rate is mainly controlled by GM defects, the interface transmissivity between the GM and the underlying medium also influences the leakage rate of composite liners. Chai et al [ 37 ] described two methods for calculating the value of transmissivity: one is by inverse calculation from the results of flow test experiments and the other is by directly measuring the GM/underlying layer interface transmissivity. For example, Barroso [ 38 ] measured the leakage rate of a GM (with holes)/GCL/soil-based composite liner through an indoor leakage test.…”

Section: Convection Of Pollutants Through Gm/gcl/almentioning

confidence: 99%

Review of the Anti-Pollution Performance of Triple-Layer GM/GCL/AL Composite Liners

Huang

Zhang

et al. 2022

Membranes

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Landfill leachates contain several types of pollutants and complex components, which pollute soils and groundwater. To compensate for the limitations of single-layer and double-layer liners, a triple-layer liner system composed of a geomembrane (GM), geosynthetic clay liner (GCL), and attenuation layer (AL) was invented and widely used in landfill anti-pollution systems. In this paper, the available literature on triple-layer GM/GCL/AL composite liners is summarized. First, the four main transport processes of pollutants through the composite liner, including convection, diffusion, adsorption, and degradation, were analyzed, and the anti-pollution performances were evaluated. According to this, the pollutant transport model considering the transport activity and transport state was classified, and the solution methods were summarized. Finally, the breakthrough time expressions of the composite liners were determined, which provided a base for evaluating their long-term performance and predicting the service life. The purpose of this literature review is to scientifically evaluate the anti-pollution performance of GM/GCL/AL and provide a scientific base and theoretical guidance for extending its application.

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Section: Convection Of Pollutants Through Gm/gcl/almentioning

confidence: 99%

Review of the Anti-Pollution Performance of Triple-Layer GM/GCL/AL Composite Liners

Huang

Zhang

et al. 2022

Membranes

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“…The composite liners consisting of a geomembrane (GM) and a compacted clay layer (CCL) or a GM, a geosynthetic clay liner (GCL), and a soil liner (SL) are intended to minimize groundwater contamination due to the migration of landfill leachates Chai et al 2008;Varank et al 2011a, b). GCLs have been widely used in landfill liner systems to replace the traditional compacted clay liners (CCL) because of their low price, easily controlled construction quality, and low permeability (Koerner 2005;Guyonnet et al 2009;Bouazza and Bowders 2010).…”

Section: Introductionmentioning

confidence: 99%

An analytical model for volatile organic compound transport through a composite liner consisting of a geomembrane, a GCL, and a soil liner

Xie

Jiang

Zhang

et al. 2014

Environ Sci Pollut Res

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An analytical model for volatile organic compounds (VOCs) transport through a composite liner consisting of a geomembrane (GM), a geosynthetic clay liner (GCL), and a soil liner (SL) was developed for the assessment of the performance of this triple liner system. Both advection through the defects of GM and diffusion in the intact GM were considered in the model, and dimensionless analytical solution was obtained. The soil concentration profiles obtained by the proposed analytical solution have a good agreement with those obtained by the finite-layer-based software POLLUTE v7. The effects of leachate head, length of the connected wrinkles, and the interface transmissivity of GM/GCL on the breakthrough curves of the liner system were then investigated. Results show that the 30-year base flux of the liner system for the case with leachate head = 10 m and length of the connected wrinkles = 1,000 m can be over 60 times greater than that of the pure diffusion case. The length of the connected wrinkles of the GM has greater influence on the base flux of the liner system than on the base concentration. The interface transmissivity has negligible effect on the solute breakthrough curves of the liner system for relatively low values of the length of the connected wrinkles (e.g., <100 m). The groundwater protection level achieved by GM/CCL is more effective than that by GM/GCL/SL in the earlier times. However, the steady state base flux for GM/GCL/SL can be seven to eight times lower than that for GM/CCL. The analytical solution can also be used for experimental data fitting, verification of complicated numerical models, and preliminary design of composite liners.

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A solution for calculating the leakage rate through GMB/CCL composite liners with long defects

Li,

Yao,

Chen

et al. 2023

Computers and Geotechnics

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Effect of effective overburden pressure on geomembrane/soil interface transmissivity

Cited by 5 publications

References 13 publications

Review of the Anti-Pollution Performance of Triple-Layer GM/GCL/AL Composite Liners

Review of the Anti-Pollution Performance of Triple-Layer GM/GCL/AL Composite Liners

An analytical model for volatile organic compound transport through a composite liner consisting of a geomembrane, a GCL, and a soil liner

A solution for calculating the leakage rate through GMB/CCL composite liners with long defects

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