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8. lvrm ch11 ukraine slope stabilization 60 min

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slope stabilization

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8. lvrm ch11 ukraine slope stabilization 60 min

  1. 1. Gordon R. Keller, PE, GEGordon R. Keller, PE, GE Geotechnical EngineerGeotechnical Engineer grkeller@fs.fed.usgrkeller@fs.fed.us oror gordonrkeller@gmail.comgordonrkeller@gmail.com Slope StabilizationSlope Stabilization Rural Roads Educational Webinar SeriesRural Roads Educational Webinar Series
  2. 2. Slopes and SlopeSlopes and Slope StabilizationStabilization • Avoiding Unstable AreasAvoiding Unstable Areas • Preventing InstabilityPreventing Instability • Stabilizing SlidesStabilizing Slides • Stabilization AlternativesStabilization Alternatives
  3. 3. Mike Long
  4. 4. Slide Recognition and AvoidanceSlide Recognition and Avoidance
  5. 5. Slide PreventionSlide Prevention
  6. 6. Cut SlopesCut Slopes
  7. 7. Fill SlopesFill Slopes
  8. 8. Nearly Vertical CutsNearly Vertical Cuts
  9. 9. Slope Stabilization AlternativesSlope Stabilization Alternatives
  10. 10. Assessment of Risks Involved •Hazard, or Likelihood of Failure •Consequences of Failure/Values at Risk (Infrastructure and Environment) Range of Management Options •Do Nothing or Adapting to Slide •Move Facilities, Protection Measures •Stabilization Measures
  11. 11. Stabilization Measures (What is adequate and cost-effective) •Maintenance--Slide Removal •Use of Vegetation, Drainage •Slope Modification •Gabions, Small Walls, Buttresses •Reinforced Fills, Deep Patch Repairs •Designed Retaining Structures •Piles, Anchors, Soil Nails, Etc.
  12. 12. Use of Vegetation for Slide PreventionUse of Vegetation for Slide Prevention and Slope Stabilizationand Slope Stabilization
  13. 13. D. Gray R. Sotir
  14. 14. Soil bioengineeringSoil bioengineering andand biotechnical slopebiotechnical slope stabilizationstabilization R. Sotir
  15. 15. J. McCullah R. Sotir
  16. 16. Surface andSurface and subsurfacesubsurface drainagedrainage
  17. 17. C. Gillies
  18. 18. Rock Cuts & Rock Fall Problems CDOT
  19. 19. Flattening or reshaping over-steepFlattening or reshaping over-steep failingfailing slopesslopes;
  20. 20. Fill Slope StabilizationFill Slope Stabilization
  21. 21. Placement of Waste Material
  22. 22. Bad Disposal Sites
  23. 23. OK Disposal AreasOK Disposal Areas
  24. 24. ReinforcedReinforced FillsFills
  25. 25. Deep PatchDeep Patch
  26. 26. Retaining WallRetaining Wall
  27. 27. MSE WallsMSE Walls (MechanicallyStabilized Earth)(MechanicallyStabilized Earth)
  28. 28. MSE WallsMSE Walls
  29. 29. Soil Nail LauncherSoil Nail Launcher Bob Barrett
  30. 30. GRS Bridge AbutmentsGRS Bridge Abutments
  31. 31. FHWA GRS Integrated Abutment Design (Bowman Road Bridge, Defiance Co. Ohio)
  32. 32. -TRB SR 247- Landslides- Investigation and Mitigation -USFS- Slope Stability Reference Guide
  33. 33. Walls Need Good Foundations!!Walls Need Good Foundations!!
  34. 34. Ed Rose
  35. 35. Ed Rose
  36. 36. SummarySummary • Use commonly stable cut and fill slope angles • For failures, assess why a site failed • Find the least expensive, effective stabilization measure • Consider use of drainage and vegetation • Use structures where necessary. Analyze and design significant structures! • Place structures on a solid foundation
  37. 37. Gordon Keller, PE, GEGordon Keller, PE, GE Geotechnical EngineerGeotechnical Engineer grkeller@fs.fed.usgrkeller@fs.fed.us gordonrkeller@gmail.comgordonrkeller@gmail.com

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