Evaluating the interface shear strength of geocomposite drain and HDPE geomembrane layers in landfill cover systems
Evaluating the interface shear strength of geocomposite drain and HDPE geomembrane layers in landfill cover systems
This study evaluates the shear strength of geosynthetic drain-HDPE geomembrane interfaces under dry and submerged conditions at normal stresses of 10, 20, and 30 kPa using a comprehensive large-scale direct shear testing program. Results revieled higher shear stress in dry conditions, with a significant reduction upon submersion due to water's lubricating effect. Despite a lower friction angle, the geocomposite drain maintains a consistent friction angle in residual shear strength tests, crucial for landfill cover stability. The geocomposite's lighter weight and reduced height are advantageous, potentially compensating for lower friction angles and contributing to slope stability. The outcomes of this study provide significant insights, which are essential in refining the engineering design of landfill cover systems incorporating geosynthetics. Further research is needed to fully understand the impact of the geocomposite physical properties on the overall slope stability.
F. Chihi; G. Varga
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
B - Geohazards
Contact Information
- Secretary General - Dr A M McNamara
- Email: [email protected]
- Phone: +44 20 7040 8154
- City, University of London
- Northampton Square
- London EC1V 0HB. United Kingdom