Geosynthetic clay liners subjected to differential settlement

Journal Article · Thu May 01 04:00:00 EDT 1997 · Journal of Geotechnical and Geoenvironmental Engineering

DOI:https://doi.org/10.1061/(ASCE)1090-0241(1997)123:5(402)· OSTI ID:506015

LaGatta, M D ^[1]; Boardman, B T ^[2]; Cooley, B H ^[3]; Daniel, D E ^[4]

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1. Golder Associates, Mt. Laurel, NJ (United States)
2. Univ. of California, Berkeley, CA (United States). Dept. of Civil Engineering
3. GeoSyntec Consultants, Huntington Beach, CA (United States)
4. Univ. of Illinois, Urbana, IL (United States). Civil Engineering Dept.

Geosynthetic clay liners (GCLs), which consist of a thin layer of bentonite attached to one or more geosynthetic materials, are receiving increased use as low-permeability barrier layers in waste-containment systems. Tests were performed in tanks to measure the hydraulic conductivity of GCLs that were subjected to differential settlement. In most cases the GCLs maintained a hydraulic conductivity of 1 {times} 10{sup {minus}7} cm/s or less when subjected to tensile strains of 1{minus}> 10%, depending on the material and test conditions. Overlapped GCL panels maintained their hydraulic integrity despite in-plane slippage of up to 25--100 mm. In general, the ability of GCLs to withstand differential settlement appears to be greater than that of compacted clay liners, but less than that of geomembranes. GCLs are a promising barrier material for situations in which differential settlement is expected, for example, in landfill final covers.

• Sponsoring Organization: USDOE
• OSTI ID: 506015
• Journal Information: Journal of Geotechnical and Geoenvironmental Engineering, Journal Name: Journal of Geotechnical and Geoenvironmental Engineering Journal Issue: 5 Vol. 123; ISSN 1090-0241; ISSN JGGEFK
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
BENTONITE
CLAYS
CONTAINMENT SYSTEMS
COVERINGS
GROUND SUBSIDENCE
HYDRAULIC CONDUCTIVITY
LINERS
MECHANICAL PROPERTIES
SANITARY LANDFILLS
SYNTHETIC MATERIALS