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Underground Pipelines Module #8

Underground Pipelines Module #8. Prepared by Dr. Randy R. Rapp July 2005. Installation Methods. Trenching and backfilling (cut and cover) Traditional Bedding can be critical Pipe jacking Horizontal directional drilling Slip lining Pipe bursting. Horizontal Directional Drill.

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Underground Pipelines Module #8

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  1. Underground PipelinesModule #8 Prepared by Dr. Randy R. Rapp July 2005

  2. Installation Methods • Trenching and backfilling (cut and cover) • Traditional • Bedding can be critical • Pipe jacking • Horizontal directional drilling • Slip lining • Pipe bursting 2005, Randy R. Rapp

  3. Horizontal Directional Drill 2005, Randy R. Rapp

  4. HDD Reception Pit 2005, Randy R. Rapp

  5. Plastic Pipe • PVC, PE, HDPE • Protect joints • Solvents, thermal (PE, HDPE), or threads • Snaking • Bedding and backfilling • Flotation • No blocking • Expansion loops or joints • Supports 2005, Randy R. Rapp

  6. Vitreous Clay Pipe (VCP) • National Clay Pipe Institute standards, p. 183; Table 8-2 2005, Randy R. Rapp

  7. Concrete Pipe • Unreinforced • RCP, Reinforced Concrete Pipe • Reinforcement patterns • Inspection and preparation • Laying and jointing • Bedding and backfill 2005, Randy R. Rapp

  8. RCCP (Reinforced Concrete Cylinder Pipe) and ML&C (Mortar-Lined and Coated Steel Pipe) • Delivery, storage and handling • Excavation and bedding • Lifting and positioning • Jointing • Backfilling and compaction 2005, Randy R. Rapp

  9. Trenches • Sheeting • Subsidence • Specifications • Backfilling 2005, Randy R. Rapp

  10. Payment • Station lengths, if specified • Otherwise, slope length • Length placed before cutting, rounded up to nearest 2-ft increment • If centerline is skewed, use longer side • Include any “formed out” distance 2005, Randy R. Rapp

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