Pipe bedding and backfill volume
Bedding and pipe-zone stone, final backfill and spoil for a pipe trench.
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- Your own numbers, worked out as often as you like
- The full pipe trench sheet you can print or save to My work
- 4 cited sources, linked, with the checks to make
- Every other tool for the same role, in the same plan
- A plain-words read of your result (a fuller AI read with the Bifrost AI add-on)
Included in these role plans
Example result · fictional numbers
What you get: pipe trench sheet
Worked out by this tool from its default inputs. Its role plan lets you run your own numbers, print the sheet and save it.
140 tons of stone, 8 loads of spoil out, $4,893.23 for 400 ft ($12.23 a foot) over 3 days
- Excavation
- 356 bank CY
- Bedding and pipe-zone stone
- 100 CY → 140 tons
- Final backfill (compacted)
- 243 CY
- Pipe displacement
- 13 CY
- Surplus spoil (bank)
- 113 CY before shrink
Order list
- Bedding and pipe-zone stone
- 140.5 tons (100 CY at 1.40 tons per CY)
- Pipe zone depth
- 30.5 in: 6.0 in bedding, 12.5 in pipe, 12.0 in over the crown
- Side clearance
- 11.8 in each side of the pipe in a 3.0 ft trench, for haunching and compaction
- Imported fill (only if short)
- None needed
- Spoil trucks out
- 8 loads
Also on the sheet
- Earthwork balance · 3 lines, starting with “Dug from the trench”
- Cost sheet · 5 lines, starting with “Stone”
- Daily schedule · 4 lines, starting with “Working days”
The plain-words read of this example
This 400 ft run needs 140 tons of bedding and pipe-zone stone and 243 CY of compacted final backfill. At 25% swell and 10% shrink the native spoil leaves 108 CY loose to haul off (8 loads). Reusing the spoil costs $4,893.23 and importing select fill costs $13,838.05; your plan to reuse the native spoil is $12.23 a foot. At 160 ft a day it takes 3 working days. The embedment class and compaction come from your project spec and ASTM D2321.
4 cited sources
- ASTM D2321, Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow Applications (ASTM International)
- Installation Guide for Solid Wall PVC Sewer Pipe (Uni-Bell PVC Pipe Association)
- Swell and void percentage, load factors (Caterpillar)
- 29 CFR 1926.651, Specific excavation requirements (OSHA)
Plus 5 step-by-step checks, a print layout and a link that reopens it with your numbers.