Effect of Progressive Failure on Measured Shear Strength of Geomembrane/GCL Interface
Authors:
- 1 April 2008
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Geotechnical and Geoenvironmental Engineering
- Vol. 134 (4) , 459-469
Abstract
This paper presents experimental data and numerical modeling results that illustrate the effects of progressive failure on the measured shear strength of a textured geomembrane/geosynthetic clay liner (GMX/GCL) interface. Large direct shear tests were conducted using different specimen gripping/clamping systems to isolate the effects of progressive failure. These tests indicate that progressive failure causes a reduction in measured peak shear strength, an increase in the displacement at peak, an increase in large displacement shear strength, and significant distortion of the shear stress–displacement relationship. A numerical model was developed to simulate progressive failure of a GMX/GCL interface. Measured and simulated shear stress–displacement relationships are in good-to-excellent agreement at four normal stress levels. The model was then used to investigate mechanisms of progressive interface failure and factors that control its significance. The results indicate that accurate measurements of shea...Keywords
This publication has 16 references indexed in Scilit:
- Dynamic Shear Behavior of a Needle-Punched Geosynthetic Clay LinerJournal of Geotechnical and Geoenvironmental Engineering, 2007
- Mechanism of post-peak strength reduction for textured geomembrane–nonwoven geotextile interfacesGeosynthetics International, 2006
- A mathematical model for the strain-rate dependent stress–strain response of HDPE geomembranesGeotextiles and Geomembranes, 2004
- Internal and interface shear strengths of unreinforced and needle-punched geosynthetic clay linersGeosynthetics International, 2004
- State-of-the-art report: GCL shear strength and its measurementGeosynthetics International, 2004
- Laboratory Measurement of GCL Shear Strength2004
- Progressive Failure of Lined Waste ImpoundmentsJournal of Geotechnical and Geoenvironmental Engineering, 2001
- Shear Strength of HDPE Geomembrane/Geosynthetic Clay Liner InterfacesJournal of Geotechnical and Geoenvironmental Engineering, 2001
- Load-strain-displacement response of geosynthetics in monotonic and cyclic pulloutCanadian Geotechnical Journal, 1998
- Long-Term Shear Strength Behavior of a Needlepunched Geosynthetic Clay Liner1997