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

2. 2005, Randy R. Rapp2 Installation Methods Trenching and backfilling (cut and cover) –Traditional –Bedding can be critical Pipe jacking Horizontal directional drilling Slip lining Pipe bursting

3. 2005, Randy R. Rapp3 Horizontal Directional Drill

4. 2005, Randy R. Rapp4 HDD Reception Pit

5. 2005, Randy R. Rapp5 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

6. 2005, Randy R. Rapp6 Vitreous Clay Pipe (VCP) National Clay Pipe Institute standards, p. 183; Table 8-2

7. 2005, Randy R. Rapp7 Concrete Pipe Unreinforced RCP, Reinforced Concrete Pipe –Reinforcement patterns –Inspection and preparation –Laying and jointing –Bedding and backfill

8. 2005, Randy R. Rapp8 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

9. 2005, Randy R. Rapp9 Trenches Sheeting Subsidence Specifications Backfilling

10. 2005, Randy R. Rapp10 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