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A platform for research: civil engineering, architecture and urbanism
Hydraulic behaviour of geosynthetic and granular landfill drainage materials in the Sa Kaeo landfill, Thailand
AbstractExtensive transmissivity tests on several configurations of geosynthetic drainage materials were performed to evaluate the effects of boundary materials, hydraulic gradients, and applied normal stresses on the flow rate behaviour of geonet and geocomposite materials. The flow rate reduction of different geonets at higher stress levels (>400kPa) was found to be significantly different than their reduction at low stress levels. This suggests setting an optimum stress limit for a given geonet; so that drainage capacity of the geonet may reduce to an unacceptable level above the limit. The geonet with higher immediate compression factor in creep test showed comparatively higher flow rate reduction. The apparent permeability of drainage gravels and transmissivity of geocomposite materials measured under site-specific boundary condition of Sa Kaeo landfill were used to predict their performance in the landfill. The leachate thickness built up on the primary liner was found sufficiently below the maximum thickness of granular layer. Although the leachate thickness built-up on secondary liner was different in different geonets, the hydraulic safety factors of geonets were identical.
Hydraulic behaviour of geosynthetic and granular landfill drainage materials in the Sa Kaeo landfill, Thailand
AbstractExtensive transmissivity tests on several configurations of geosynthetic drainage materials were performed to evaluate the effects of boundary materials, hydraulic gradients, and applied normal stresses on the flow rate behaviour of geonet and geocomposite materials. The flow rate reduction of different geonets at higher stress levels (>400kPa) was found to be significantly different than their reduction at low stress levels. This suggests setting an optimum stress limit for a given geonet; so that drainage capacity of the geonet may reduce to an unacceptable level above the limit. The geonet with higher immediate compression factor in creep test showed comparatively higher flow rate reduction. The apparent permeability of drainage gravels and transmissivity of geocomposite materials measured under site-specific boundary condition of Sa Kaeo landfill were used to predict their performance in the landfill. The leachate thickness built up on the primary liner was found sufficiently below the maximum thickness of granular layer. Although the leachate thickness built-up on secondary liner was different in different geonets, the hydraulic safety factors of geonets were identical.
Hydraulic behaviour of geosynthetic and granular landfill drainage materials in the Sa Kaeo landfill, Thailand
Jaisi, D.P. (author) / Glawe, U. (author) / Bergado, D.T. (author)
Geotextiles and Geomembranes ; 23 ; 185-204
2004-12-08
20 pages
Article (Journal)
Electronic Resource
English
Drainage , Geonet , Geocomposite , Geonet creep , Gravel
About the dimensioning of geosynthetic drainage systems in landfill covers
| British Library Conference Proceedings | 1996