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Spectra halfday pdf Spectra halfday pdf Presentation Transcript

  • NILEX Inc.Materials and Construction for Earth and Water
  • 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.
  • Office Locations:Edmonton-Head OfficeCalgaryBurnabyVernonGrand PrairieSaskatoonWinnipeg
  • GEOSYNTHETIC FUNCTIONS • Separation • Filtration • Drainage • Subgrade Improvement • Granular Base Reinforcement
  • Non-Woven Geotextiles • Needlepunched • Spunbonded
  • SEPARATION FUNCTIONWithout Geosynthetic With Geosynthetic
  • Separation Function• For subgrade CBR’s <3, benefit roughly equal to 150 mm of base gravel that would otherwise be contaminated
  • FILTRATION
  • FILTRATIONAPPLICATION
  • GEOSYNTHETICS PRODUCT TYPE FUNCTION NON-WOVEN WOVEN GEOGRID FABRIC FABRIC BASE REINFORCEMENTSUBGRADE IMPROVEMENT SEPARATION FILTRATION DRAINAGE
  • IN-PLANE DRAINAGE Fabric
  • Reinforcement Functions• Subgrade Improvement – Tension membrane - high deformation – Geogrids & Geotextiles• Granular Base Reinforcement – Lateral interlock - low deformation – Geogrids only
  • SubgradeImprovement
  • Pavement Systems forSubgrade Improvement Base Reinforcement
  • Base vs. Subgrade
  • A Geogrid System Changes TheDynamics of Load Interaction With the Subgrade
  • Granular Base Reinforcement Lateral Interlock
  • Confinement
  • Subgrade Improvement
  • Local Success StoriesAlaska Highway / Ft. Nelson / Nov.6, 2003
  • An Everyday Problem
  • The SolutionStep 1 - Place Geogrid Over Subgrade
  • The SolutionStep 2 - Place Fill Over Geogrid
  • Field Test - Gravel Road Construction Over Very Soft Soils Performed By:Steve L. Webster - U.S. Army Corps of Engineers January 1996
  • Typical Northern Application Subgrade Improvement
  • Geogrid Installation 18” Lift
  • Alaska Hwy/Clarke Bypass Ft NelsonProblem - to reduce section and save material costs.
  • Solution - BX 1200 - 100 mm savings over 47,000 m2 = $170,000 saved plus TBR of 5.0 for lower lifecycle costs
  • Cold Weather Application ClarkeBypass/ SYD’s Road / Ft. Nelson
  • Clarke Bypass - end dump onexisting fill and push forward
  • Syd’s Intersection/ snap ties
  • Syd’s Road
  • Princess Ave./ Ft. St. JohnOriginal Design Structure 50mm AC, 150mm of 19mm base, 300 mm of 40 mm base
  • Princess Ave - Original design includes perforated perimeter subdrain c/w drain rock and Amoco 4551 Geotextile on subgrade compacted to 95%
  • 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.
  • Princess Ave - The Solution - BX 1100 and Amoco 4551 saving sub- exc. of 300 mm with associated costs and time on uncompacted subgrade
  • Princess Ave./ Ft. St. John
  • Princess Ave / Urban Systems/ Amec/ DGS/ City crews
  • Dawson Creek Walmart - Problem - reduce section and create uniform bearing for parking lot 25,000 m2 BX 1200
  • 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)
  • 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
  • DesignExample
  • Confinement
  • 1992 Corps of Engineers Several Grids Tested
  • 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
  • 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