Use of GCL to mitigate shear-induced damage to geomembrane from gravel in underlying compacted clay

Patrick Joseph Fox, Stuart S. Thielmann, Alexander N. Stern, Chris Athanassopoulos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Liner systems for landfills and heap leach pads are often constructed with compacted clay liners (CCLs) containing significant amounts of gravel. A geomembrane placed against a gravelly CCL can be vulnerable to damage under conditions of high overburden stress combined with interface shear displacement. Large-scale shear tests were conducted over a wide range of normal stress for smooth HDPE geomembranes over CCLs containing 20% angular gravel. Replicate shear tests were also conducted with a geosynthetic clay liner (GCL) in between the geomembrane and CCL to evaluate protection provided by the GCL. Results indicate that shear displacement between a geomembrane and a gravelly CCL under high normal stress conditions can cause severe damage to the geomembrane. Results also indicate that placing a GCL under the geomembrane can greatly reduce such damage.

Original languageEnglish (US)
Title of host publicationGeo-Congress 2014 Technical Papers
Subtitle of host publicationGeo-Characterization and Modeling for Sustainability - Proceedings of the 2014 Congress
PublisherAmerican Society of Civil Engineers (ASCE)
Pages1951-1959
Number of pages9
Edition234 GSP
ISBN (Print)9780784413272
DOIs
StatePublished - Jan 1 2014
Event2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014 - Atlanta, GA, United States
Duration: Feb 23 2014Feb 26 2014

Publication series

NameGeotechnical Special Publication
Number234 GSP
ISSN (Print)0895-0563

Other

Other2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014
CountryUnited States
CityAtlanta, GA
Period2/23/142/26/14

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Fox, P. J., Thielmann, S. S., Stern, A. N., & Athanassopoulos, C. (2014). Use of GCL to mitigate shear-induced damage to geomembrane from gravel in underlying compacted clay. In Geo-Congress 2014 Technical Papers: Geo-Characterization and Modeling for Sustainability - Proceedings of the 2014 Congress (234 GSP ed., pp. 1951-1959). (Geotechnical Special Publication; No. 234 GSP). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784413272.191