A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
In Situ Deformation Measurements for Geomembranes in Landfill Liners
Displacement monitoring systems were installed to measure response of geomembrane liners in municipal solid waste landfills in Alaska and New Mexico, USA. Displacements were monitored for extended durations from initial waste filling to several years after waste placement. Based on the investigation, the following conclusions were drawn: (1) Displacements of geomembranes were observed in the field after construction, and prior to and during waste placement. (2) The maximum displacements were on the order of 125 mm down slope and 300 mm upslope corresponding to strains on the order of between approximately -1.3% (compressive) to +2.6% (tensile) as calculated from sequential displacement monitoring coupons, supporting the use of residual interface shear strengths for stability analyses. (3) Maximum tensile strains occurred near the toe of the slopes. (4) The magnitudes of strains at the Alaska site were larger than at the New Mexico site, which was attributed to the steeper slope and greater waste height at Alaska. (5) Maximum displacements occurred within 0.5 to 2 years after construction with limited further displacements occurring in the long-term. (6) The long-term response of the liners (beyond approximately 1000 days at both sites) indicated onset of small and continued displacements, which may be resulting in wrinkling strains in the long term. (7) Upslope displacements were common at the test sites and were attributed to buttress effect, thermal contraction, and translational movement between underlying GCLs and the geomembranes. In general, tension in geomembranes had been predicted in previous studies based on numerical analysis.
In Situ Deformation Measurements for Geomembranes in Landfill Liners
Displacement monitoring systems were installed to measure response of geomembrane liners in municipal solid waste landfills in Alaska and New Mexico, USA. Displacements were monitored for extended durations from initial waste filling to several years after waste placement. Based on the investigation, the following conclusions were drawn: (1) Displacements of geomembranes were observed in the field after construction, and prior to and during waste placement. (2) The maximum displacements were on the order of 125 mm down slope and 300 mm upslope corresponding to strains on the order of between approximately -1.3% (compressive) to +2.6% (tensile) as calculated from sequential displacement monitoring coupons, supporting the use of residual interface shear strengths for stability analyses. (3) Maximum tensile strains occurred near the toe of the slopes. (4) The magnitudes of strains at the Alaska site were larger than at the New Mexico site, which was attributed to the steeper slope and greater waste height at Alaska. (5) Maximum displacements occurred within 0.5 to 2 years after construction with limited further displacements occurring in the long-term. (6) The long-term response of the liners (beyond approximately 1000 days at both sites) indicated onset of small and continued displacements, which may be resulting in wrinkling strains in the long term. (7) Upslope displacements were common at the test sites and were attributed to buttress effect, thermal contraction, and translational movement between underlying GCLs and the geomembranes. In general, tension in geomembranes had been predicted in previous studies based on numerical analysis.
In Situ Deformation Measurements for Geomembranes in Landfill Liners
Hanson, James L. (author) / Onnen, Michael T. (author) / Yesiller, Nazli (author)
2013
7 Seiten, Bilder, Tabellen, Quellen
Conference paper
Storage medium
English
Specialty Geomembranes and Liners
| Wiley | 2009
Polyurea Geomembranes: High Performance Seamless Liners
| British Library Conference Proceedings | 2008
Innovative, Protective Mattresses for Landfill Geomembranes
| British Library Conference Proceedings | 1994