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Published byBenedict Lindsey Modified over 8 years ago
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Underground Pipelines Module #8 Prepared by Dr. Randy R. Rapp July 2005
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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
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2005, Randy R. Rapp3 Horizontal Directional Drill
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2005, Randy R. Rapp4 HDD Reception Pit
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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
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2005, Randy R. Rapp6 Vitreous Clay Pipe (VCP) National Clay Pipe Institute standards, p. 183; Table 8-2
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2005, Randy R. Rapp7 Concrete Pipe Unreinforced RCP, Reinforced Concrete Pipe –Reinforcement patterns –Inspection and preparation –Laying and jointing –Bedding and backfill
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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
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2005, Randy R. Rapp9 Trenches Sheeting Subsidence Specifications Backfilling
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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
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