Spectra halfday pdf

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Spectra halfday pdf

  1. 1. NILEX Inc.Materials and Construction for Earth and Water
  2. 2. Nilex Applications:Roads (Paved & Unpaved)Woven & Nonwoven Geotextiles; Geogrids; Paving Membranes &Reinforcements.MSE Systems(Mechanically Stabilized Earth Retaining Walls & Slopes)Precast Concrete Panels; Modular Concrete Blocks;Steepened Slopes – vegetated & rock-faced.Erosion & Sediment ControlErosion Blankets; Silt Fence; Geo-Ridge; Articulated Concrete,Cellular & Gabion Revetments.DrainageStrip Drains; Sheet, Wall & Deck Drains; Multi-Flow; Weeping Tile.ContainmentGeomembranes & Geosynthetic Clay Liners (GCLs).Ground ModificationWick Drains & Earthquake Drain Installation.
  3. 3. Office Locations:Edmonton-Head OfficeCalgaryBurnabyVernonGrand PrairieSaskatoonWinnipeg
  4. 4. GEOSYNTHETIC FUNCTIONS • Separation • Filtration • Drainage • Subgrade Improvement • Granular Base Reinforcement
  5. 5. Non-Woven Geotextiles • Needlepunched • Spunbonded
  6. 6. SEPARATION FUNCTIONWithout Geosynthetic With Geosynthetic
  7. 7. Separation Function• For subgrade CBR’s <3, benefit roughly equal to 150 mm of base gravel that would otherwise be contaminated
  8. 8. FILTRATION
  9. 9. FILTRATIONAPPLICATION
  10. 10. GEOSYNTHETICS PRODUCT TYPE FUNCTION NON-WOVEN WOVEN GEOGRID FABRIC FABRIC BASE REINFORCEMENTSUBGRADE IMPROVEMENT SEPARATION FILTRATION DRAINAGE
  11. 11. IN-PLANE DRAINAGE Fabric
  12. 12. Reinforcement Functions• Subgrade Improvement – Tension membrane - high deformation – Geogrids & Geotextiles• Granular Base Reinforcement – Lateral interlock - low deformation – Geogrids only
  13. 13. SubgradeImprovement
  14. 14. Pavement Systems forSubgrade Improvement Base Reinforcement
  15. 15. Base vs. Subgrade
  16. 16. A Geogrid System Changes TheDynamics of Load Interaction With the Subgrade
  17. 17. Granular Base Reinforcement Lateral Interlock
  18. 18. Confinement
  19. 19. Subgrade Improvement
  20. 20. Local Success StoriesAlaska Highway / Ft. Nelson / Nov.6, 2003
  21. 21. An Everyday Problem
  22. 22. The SolutionStep 1 - Place Geogrid Over Subgrade
  23. 23. The SolutionStep 2 - Place Fill Over Geogrid
  24. 24. Field Test - Gravel Road Construction Over Very Soft Soils Performed By:Steve L. Webster - U.S. Army Corps of Engineers January 1996
  25. 25. Typical Northern Application Subgrade Improvement
  26. 26. Geogrid Installation 18” Lift
  27. 27. Alaska Hwy/Clarke Bypass Ft NelsonProblem - to reduce section and save material costs.
  28. 28. Solution - BX 1200 - 100 mm savings over 47,000 m2 = $170,000 saved plus TBR of 5.0 for lower lifecycle costs
  29. 29. Cold Weather Application ClarkeBypass/ SYD’s Road / Ft. Nelson
  30. 30. Clarke Bypass - end dump onexisting fill and push forward
  31. 31. Syd’s Intersection/ snap ties
  32. 32. Syd’s Road
  33. 33. Princess Ave./ Ft. St. JohnOriginal Design Structure 50mm AC, 150mm of 19mm base, 300 mm of 40 mm base
  34. 34. Princess Ave - Original design includes perforated perimeter subdrain c/w drain rock and Amoco 4551 Geotextile on subgrade compacted to 95%
  35. 35. The Problem - Due to poor subgrade conditions of saturated silty clays the subase needed to be increased by 400 mm but unable do to so due to N.G. lines.
  36. 36. Princess Ave - The Solution - BX 1100 and Amoco 4551 saving sub- exc. of 300 mm with associated costs and time on uncompacted subgrade
  37. 37. Princess Ave./ Ft. St. John
  38. 38. Princess Ave / Urban Systems/ Amec/ DGS/ City crews
  39. 39. Dawson Creek Walmart - Problem - reduce section and create uniform bearing for parking lot 25,000 m2 BX 1200
  40. 40. Dawson Creek Walmart - Solution BX1200 - reduce base course thickness by 150 mm and25 mm reduction in base course - savings = $ 105,600.00 (net savings = cost of geogrid - cost of gravel savings)
  41. 41. Additional Success StoriesAnnually - City of Dawson Creek - various roadsAnnually - City of Ft. St. John - virtually all total reconstructroads2002 - Presporto Road - 2800 m2, BX 11002003 - Pouce Coupe Sideroad 35,000 m2 of BX1100 andgeotextileAnnually - DGS Contractors - ongoing basis for public andprivate projects2002 - Beaton River/Dawson const. - 263,000 m2 Amoco 4551GeotextileMOT - on going basis
  42. 42. DesignExample
  43. 43. Confinement
  44. 44. 1992 Corps of Engineers Several Grids Tested
  45. 45. 1992 Corps of Engineers Several Grids TestedControl Section No Geogrid Severe RuttingTensar Section BX1200 Geogrid Rutting ControlledBoth Sections 2” of ACP 6” of Base Subgrade CBR=3 2,016 Passes
  46. 46. 1992 Corps of Engineers Results Traffic Benefit Ratio (TBR) = Ratio of reinforced/unreinforced traffic repetitions 5 4.7 2” Asphalt Concrete 14” Aggregate Base 4 Subgrade CBR = 3 3.4 Rut Criteria = 1” 3TBR 2 1.6 0.9 0.9 1 1 0 Grid A Grid B Control Grid D Grid E Grid F

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