Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Failure mechanisms of geosynthetic clay liner and textured geomembrane composite systems
https://orcid.org/0000-0003-3427-4344
Abstract The objective of this study was to evaluate shear behavior and failure mechanisms of composite systems comprised of a geosynthetic clay liner (GCL) and textured geomembrane (GMX). Internal and interface direct shear tests were performed at normal stresses ranging from 100 kPa to 2000 kPa on eight different GCL/GMX composite systems. These composite systems were selected to assess the effects of (i) GCL peel strength, (ii) geotextile type, (iii) geotextile mass per area, and (iv) GMX spike density. Three failure modes were observed for the composite systems: complete interface failure, partial interface/internal failure, and complete internal failure. Increasing normal stress transitioned the failure mode from complete interface to partial interface/internal to complete internal failure. The peak critical shear strength of GCL/GMX composite systems increased with an increase in GMX spike density. However, the effect of geotextile type and mass per area more profoundly influenced peak critical shear strength at normal stress > 500 kPa, whereby an increase in geotextile mass per area enhanced interlocking between a non-woven geotextile and GMX. Peel strength of a GCL only influenced the GCL/GMX critical shear strength when the failure mode was complete internal failure.
Highlights Evaluated GCL/GMX shear behavior via GCL-internal and GCL/GMX interface shear. Transition from complete interface to partial interface/internal to complete internal failure. Peak critical strength of GCL/GMX increased with higher GMX spike density. Geotextile mass per area can enhance interlocking with GMX at higher normal stress. GCL peel strength influences GCL/GMX critical strength only for complete internal failure.
Failure mechanisms of geosynthetic clay liner and textured geomembrane composite systems
https://orcid.org/0000-0003-3427-4344
Abstract The objective of this study was to evaluate shear behavior and failure mechanisms of composite systems comprised of a geosynthetic clay liner (GCL) and textured geomembrane (GMX). Internal and interface direct shear tests were performed at normal stresses ranging from 100 kPa to 2000 kPa on eight different GCL/GMX composite systems. These composite systems were selected to assess the effects of (i) GCL peel strength, (ii) geotextile type, (iii) geotextile mass per area, and (iv) GMX spike density. Three failure modes were observed for the composite systems: complete interface failure, partial interface/internal failure, and complete internal failure. Increasing normal stress transitioned the failure mode from complete interface to partial interface/internal to complete internal failure. The peak critical shear strength of GCL/GMX composite systems increased with an increase in GMX spike density. However, the effect of geotextile type and mass per area more profoundly influenced peak critical shear strength at normal stress > 500 kPa, whereby an increase in geotextile mass per area enhanced interlocking between a non-woven geotextile and GMX. Peel strength of a GCL only influenced the GCL/GMX critical shear strength when the failure mode was complete internal failure.
Highlights Evaluated GCL/GMX shear behavior via GCL-internal and GCL/GMX interface shear. Transition from complete interface to partial interface/internal to complete internal failure. Peak critical strength of GCL/GMX increased with higher GMX spike density. Geotextile mass per area can enhance interlocking with GMX at higher normal stress. GCL peel strength influences GCL/GMX critical strength only for complete internal failure.
Failure mechanisms of geosynthetic clay liner and textured geomembrane composite systems
https://orcid.org/0000-0003-3427-4344
Abstract The objective of this study was to evaluate shear behavior and failure mechanisms of composite systems comprised of a geosynthetic clay liner (GCL) and textured geomembrane (GMX). Internal and interface direct shear tests were performed at normal stresses ranging from 100 kPa to 2000 kPa on eight different GCL/GMX composite systems. These composite systems were selected to assess the effects of (i) GCL peel strength, (ii) geotextile type, (iii) geotextile mass per area, and (iv) GMX spike density. Three failure modes were observed for the composite systems: complete interface failure, partial interface/internal failure, and complete internal failure. Increasing normal stress transitioned the failure mode from complete interface to partial interface/internal to complete internal failure. The peak critical shear strength of GCL/GMX composite systems increased with an increase in GMX spike density. However, the effect of geotextile type and mass per area more profoundly influenced peak critical shear strength at normal stress > 500 kPa, whereby an increase in geotextile mass per area enhanced interlocking between a non-woven geotextile and GMX. Peel strength of a GCL only influenced the GCL/GMX critical shear strength when the failure mode was complete internal failure.
Highlights Evaluated GCL/GMX shear behavior via GCL-internal and GCL/GMX interface shear. Transition from complete interface to partial interface/internal to complete internal failure. Peak critical strength of GCL/GMX increased with higher GMX spike density. Geotextile mass per area can enhance interlocking with GMX at higher normal stress. GCL peel strength influences GCL/GMX critical strength only for complete internal failure.
Failure mechanisms of geosynthetic clay liner and textured geomembrane composite systems
Ghazizadeh, Shahin (Autor:in) / Bareither, Christopher A. (Autor:in)
Geotextiles and Geomembranes ; 49 ; 789-803
22.12.2020
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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