A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Geomembrane Surficial Landfill Gas Collection Systems
Typical final cover systems can be damaged by differential settlement during postclosure, can suffer from slope veneer failures, and experience strain of the geomembrane beyond allowable yield with development of excessive landfill gas (LFG) pressure beneath geomembrane barrier layers. Given the risks with standard final cover systems, additional design elements have been recommended for use in final cover systems. For example, use of sub-barrier layer LFG collection has been recommended by Thiel (1998) and Richardson (2000) to control LFG pressure beneath geomembranes to improve stability. Exposed geomembranes have been suggested for consideration by Koerner (2010) as a temporary final cover system until the deleterious effects of landfill differential settlement, and LFG generation with the attendant slope stability risks, have reduced in the initial postclosure period. In addition, geosynthetic material can be used in substitution for typical LFG control devices being used today. This paper discusses a new alternate final cover system which can best be described as a geosynthetic final cover system. It consists of a sand ballast layer placed on a specialized HDPE artificial grass tufted into a double layered polypropylene woven geotextile. This assembly is deployed across a structured geomembrane that provides a sub drainage layer beneath the turf component. This hybrid Final Cover system (trade name "Closure Turf®") can provide designers with an alternative LFG collection system that can significantly reduce requirements for more costly and easily damaged vertical LFG extraction wells for energy recovery projects. In combination with two other geosynthetic based LFG collection systems, an Integrated LFG Collection System can be deployed at modern sanitary landfills with geosynthetic materials.
Geomembrane Surficial Landfill Gas Collection Systems
Typical final cover systems can be damaged by differential settlement during postclosure, can suffer from slope veneer failures, and experience strain of the geomembrane beyond allowable yield with development of excessive landfill gas (LFG) pressure beneath geomembrane barrier layers. Given the risks with standard final cover systems, additional design elements have been recommended for use in final cover systems. For example, use of sub-barrier layer LFG collection has been recommended by Thiel (1998) and Richardson (2000) to control LFG pressure beneath geomembranes to improve stability. Exposed geomembranes have been suggested for consideration by Koerner (2010) as a temporary final cover system until the deleterious effects of landfill differential settlement, and LFG generation with the attendant slope stability risks, have reduced in the initial postclosure period. In addition, geosynthetic material can be used in substitution for typical LFG control devices being used today. This paper discusses a new alternate final cover system which can best be described as a geosynthetic final cover system. It consists of a sand ballast layer placed on a specialized HDPE artificial grass tufted into a double layered polypropylene woven geotextile. This assembly is deployed across a structured geomembrane that provides a sub drainage layer beneath the turf component. This hybrid Final Cover system (trade name "Closure Turf®") can provide designers with an alternative LFG collection system that can significantly reduce requirements for more costly and easily damaged vertical LFG extraction wells for energy recovery projects. In combination with two other geosynthetic based LFG collection systems, an Integrated LFG Collection System can be deployed at modern sanitary landfills with geosynthetic materials.
Geomembrane Surficial Landfill Gas Collection Systems
Richgels, C.M. (author) / Ayers, M. (author) / Lewis, D. (author)
2013
7 Seiten, Bilder, Tabellen, Quellen
Conference paper
Storage medium
German
Prefabricated Bituminous Geomembrane: A candidate for Exposed Geomembrane Caps for Landfill Closures
| British Library Conference Proceedings | 2008
Clay or Geomembrane for Municipal Waste Landfill?
| British Library Conference Proceedings | 1998
Investigation of Geomembrane Seam Failures: Landfill Cover
| British Library Conference Proceedings | 1997
Geomembrane landfill liners in the real world
| British Library Conference Proceedings | 1995