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March 4, 2015

American Concrete Pipe Association Inspection, Condition Assessment, and Repair of Reinforced Concrete Storm Sewers Orlando, Florida. March 4, 2015. Today’s Presenter. Jim Shelton, P.E. Jim is National Technical Director for Buried Infrastructure at ARCADIS.

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March 4, 2015

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  1. American Concrete Pipe AssociationInspection, Condition Assessment, and Repair of Reinforced Concrete Storm SewersOrlando, Florida March 4, 2015

  2. Today’s Presenter Jim Shelton, P.E. Jim is National Technical Director for Buried Infrastructure at ARCADIS. Program Manager for several large sanitary and storm sewer rehabilitation programs, including DC Water and Fairfax County. Focus on pipeline condition assessment, rehabilitation, construction management, capacity assurance, and operational assistance. Jim has been in the water and sewer business since 1985.

  3. Objectives • Understand common failure modes of RCP storm pipe • Consider the impact of as-installed defects on longevity using older RCP storm sewer performance examples • Understand readily available corrective measures to address various RCP defects • Discuss utility performance quality objectives impact on contractor risk and corrective measure limitations

  4. Why inspect RCP? • Initial installation acceptance • Will the pipe last? • Asset management • What needs to be done to old pipe to make it last longer • Failure analysis • Why did pipe fail? • Capacity assurance • Is the pipe clogged?

  5. Why inspect RCP? • Initial installation acceptance • Will the pipe last? • Asset management • What needs to be done to old pipe to make it last longer • Failure analysis • Why did pipe fail? • Capacity assurance • Is the pipe clogged?

  6. Failure modes of RCP • Structural • Leakage • Corrosion/erosion • Alignment • Cross bores • Blockage

  7. Failure modes and their significance • Joint Leakage • Indicates poor jointing • Degrades bedding • Leads to pipe sags • Sinkholes, blockages • Joint separation • Collapse • Steals wet weather capacity

  8. Failure modes and their significance • Pipe body leakage • Indicates hollows in pipe • Rebar corrosion • Potentially weak pipe

  9. Failure modes and their significance • Structural defects • Body defects • Joint defects

  10. Body Defects • Spalling

  11. Body Defects • Faulty Rebar

  12. Body Defects • Pinholes

  13. Body Defects Pin holes

  14. Body Defects • Hollows

  15. Body Defects • Holes

  16. Body Defects • Cracks

  17. Body Defects • Cracks • Cracks

  18. Body Defects • Cracks • Cracks

  19. Body Defects • Fractures

  20. Body Defects • Deflection and Breaks

  21. Joint Defects • Joint Chips

  22. Failure modes and their significance • Corrosion

  23. Failure modes and their significance • Corrosion Corrosion

  24. Failure modes and their significance Corrosion

  25. Failure modes and their significance • Corrosion Corrosion

  26. Failure modes and their significance Corrosion • Corrosion

  27. Failure modes and their significance • Corrosion Corrosion

  28. Failure modes and their significance Corrosion • Corrosion

  29. Failure modes and their significance • Erosion

  30. Failure modes and their significance • Offsets and Separations

  31. Failure modes and their significance • Offsets and Separations

  32. Failure modes and their significance • Crossbores • Punctures

  33. Failure modes and their significance Cross bores • Crossbores • Punctures

  34. Failure modes and their significance Punctures • Crossbores • Punctures

  35. Failure modes and their significance • Crossbores • Punctures Punctures

  36. Failure modes and their significance • Blockages • Failed joints, pipe, or structures

  37. Failure modes and their significance • Blockages • Sediment

  38. Failure modes and their significance • Blockages • Mineral deposits

  39. Failure modes and their significance • Blockages • Debris

  40. Inspections and Assessments

  41. Pipeline Inspection after Installation • Need time to allow settling to occur • Typically 2 significant storm events

  42. Pipeline Assessment • Manned Entry • Remote Inspection • Visual • Measured

  43. Pipeline Assessment Manned Entry

  44. Pipeline Assessment Manned Entry

  45. Pipeline Assessment Manned Entry

  46. Pipeline Assessment Manned Entry

  47. Pipeline Assessment Remote Inspection

  48. Pipeline Assessment Remote Inspection

  49. Pipeline Assessment Remote Inspection

  50. Pipeline Assessment Manual Measurements for defects, offsets, and separations

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