Effect of overburden confining stress on hydraulic performance of geosynthetic clay liners (GCLs)
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74350024. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. |
Description
Geosynthetic clay liners are a rapidly evolving geosynthetic product used in most hydraulic barrier applications in the geo-environmental industry. Continuous research has led to new insights to overcome the shortcomings faced in deploying GCLs in the field. These include shrinkage due to shear failure on side slopes, the effect of temperature variation, and inadequacy of minimum timely confinement to achieve optimum hydraulic performance. This paper presents previous experimental data and an additional dataset from this research gathered to observe the effect of overburden confining stress on GCL hydraulic conductivity and how the findings can be used to predict the performance of a geosynthetic clay liner for a given field application. An inverse power relationship is identified between these two parameters along with the reduction in the order of the degree of hydraulic conductivity depending on the permeant material passing through. A relationship is determined to estimate the GCL hydraulic conductivity as a function of the overburden confining stress, given that it is pre or post hydrated and the permeant liquid passing through the product. It is proposed that the relationship can be used to predict the GCL hydraulic performance in the field and provide guidance in improving the serviceability of hydraulic barrier designs.
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ID Code: | 207211 | ||||||
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Item Type: | Contribution to Journal (Journal Article) | ||||||
Refereed: | Yes | ||||||
ORCID iD: |
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Measurements or Duration: | 8 pages | ||||||
Keywords: | Civil engineeringGeo-environmental engineeringGeosynthetic clay linerHydraulic conductivityOverburden confining stress | ||||||
DOI: | 10.1016/j.heliyon.2020.e05770 | ||||||
ISSN: | 2405-8440 | ||||||
Pure ID: | 74350024 | ||||||
Divisions: | Current > Research Centres > Centre for the Environment Current > QUT Faculties and Divisions > Faculty of Science Current > QUT Faculties and Divisions > Faculty of Engineering Current > Schools > School of Architecture & Built Environment Current > Schools > School of Civil & Environmental Engineering |
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Copyright Owner: | Consult author(s) regarding copyright matters | ||||||
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||||||
Deposited On: | 06 Jan 2021 06:47 | ||||||
Last Modified: | 29 Jun 2024 00:36 |
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