A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Strengthen roads with tri-planar drainage geocomposites
Following the construction of a highway section, significant deformation and rutting of the roadway's surface was observed. Excavation of the road section revealed that underground springs and perched water within sand lenses were saturating the subgrade and road base materials. The engineers determined that a drainage system would be necessary to collect water in order to prevent saturation of the base course. A tri-planar geocomposite was chosen to expedite construction, reduce costs, and increase drainage performance. The engineers specified a 12-in. lift of fine filter aggregate be placed above Tenax Corporation's Tendrain 100-2 tri-planar drainage geocomposite. It was determined that the water-collection capacity and flow rate according to ASTM D 4716-01 of the geocomposite be sufficient to prevent saturation of the base aggregates. The high compressive strength would be sufficient for long-term serviceability and installation stresses. The design specified that water collected by the drainage geocomposite be carried to 4-in. geotextile-wrapped perforated-pipe lateral drains. After removal of asphalt-wearing course and base material, the subgrade was levelled. Nonwoven geotextile strips were placed above and below the drainage geocomposite roll seams to prevent soil intrusion. The 2 x 61-m rolls were fastened to the subgrade to prevent movement of the geocomposite during fill placement. Six inches of fill was placed before equipment was permitted to drive on it.
Strengthen roads with tri-planar drainage geocomposites
Following the construction of a highway section, significant deformation and rutting of the roadway's surface was observed. Excavation of the road section revealed that underground springs and perched water within sand lenses were saturating the subgrade and road base materials. The engineers determined that a drainage system would be necessary to collect water in order to prevent saturation of the base course. A tri-planar geocomposite was chosen to expedite construction, reduce costs, and increase drainage performance. The engineers specified a 12-in. lift of fine filter aggregate be placed above Tenax Corporation's Tendrain 100-2 tri-planar drainage geocomposite. It was determined that the water-collection capacity and flow rate according to ASTM D 4716-01 of the geocomposite be sufficient to prevent saturation of the base aggregates. The high compressive strength would be sufficient for long-term serviceability and installation stresses. The design specified that water collected by the drainage geocomposite be carried to 4-in. geotextile-wrapped perforated-pipe lateral drains. After removal of asphalt-wearing course and base material, the subgrade was levelled. Nonwoven geotextile strips were placed above and below the drainage geocomposite roll seams to prevent soil intrusion. The 2 x 61-m rolls were fastened to the subgrade to prevent movement of the geocomposite during fill placement. Six inches of fill was placed before equipment was permitted to drive on it.
Strengthen roads with tri-planar drainage geocomposites
Verstärkung von Straßen mit Drainage-Geoverbundstoffen
Mathews, J. (author) / Salzer, L. (author)
2003
2 Seiten, 3 Bilder
Article (Journal)
English
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