Pipe bedding

Discussion in 'Buildings & Infrastructure' started by Steevo, Sep 12, 2017.

  1. Steevo

    Steevo Member

    Location:
    Gloucestershire
    What's the most sensible choice of material for pipe bedding please?

    Not looking to spend a fortune on special bedding material, but equally don't want to waste money on the wrong thing.
     
  2. S J H

    S J H Member

    Location:
    Bedfordshire
    I had some pipe fill in last year, it was just dug out sand. If you want shingle can you get 6mm recycled?
     
    Steevo likes this.
  3. It may help if you say what pipe your laying and where the pipe will be laid, as different pipes can take different options, due to several factors. Reinforcement, material pipe made of, resistance to puncture, embrittlement etc.
     
    Kevtherev likes this.
  4. Steevo

    Steevo Member

    Location:
    Gloucestershire
    I have a couple of sludgy ditches which I'd like to pipe with twinwall. If I lay the pipe on the sludge it would sink, but digging out the sludge would mean the pipe is too low. Looking for something to put in the ditch to put the pipe on.
     
  5. skinnyhoskins

    skinnyhoskins Member

    Location:
    the narth
    10 mm clean from quarry
     
  6. S J H

    S J H Member

    Location:
    Bedfordshire
    I'd just put good soil back in and compact it, but I'm tight.
     
    Steevo likes this.
  7. So are you wanting to add a layer that you will pour onto the sludge layer simply to firm the ditch up to allow laying the pipe in the ditch, or are you encapsulating the pipe in same material - also, is the twin wall perforated or not?

    Additionally, what diameter pipe?
     
  8. Steevo

    Steevo Member

    Location:
    Gloucestershire
    I was planning to remove the layer of sludge and replace it with something else.

    I wasn't sure what to lay on top the pipe yet either.

    Pipe likely will not be perforated. 300mm pipe. Yet to purchase.
     
  9. Badshot

    Badshot Member

    Location:
    Kent
    Use stone, preferably shingle, it will aid drainage of the area, by choice I'd always lay perforated to take the water from the area.
     
  10. Kevtherev

    Kevtherev Member

    Location:
    Welshpool Powys
    The slop really needs taking out then bed the pipe on either 20mm or 40mm clean drainage stone then cover with same.
    Perforated twinwall would be ideal
     
  11. Kevtherev

    Kevtherev Member

    Location:
    Welshpool Powys
    Water pipes I use either quarry dust or sand to protect tgem
     
    skinnyhoskins likes this.
  12. If the pipe is not going to be perforated - as we are not sure the conveying requirements of your pipe, is the ditch still needed to be able to transfer field water etc that can make it to the ditch - if so, you will need a more rounded backfill imho to allow water to still flow freely and follow the fall of the ditch, otherwise you may potentially get localised pooling of water.

    If it were my ditch being repaired, I would use a fabric liner to prevent more silt issues from below, lay pea gravel for small twin wall pipe, or 20mm for larger diameters like yours. This will still allow water to flow along the ditch if any seeps into it, and give the protection to the pipe too (similar to how the french drains, but you are not using perf pipe) - or better still use perf pipe and make them french drains?

    I tend to shy away from any material that can break down and create fines, so I tend only to use gravels and clean granite only, as fines can quickly ruin a job resulting in more work later on.
     
    Kevtherev likes this.
  13. Lincsman

    Lincsman Member

    Location:
    Lincolnshire
    I would put it in with a trencher along side the ditch to keep it accurate.
     
  14. Steevo

    Steevo Member

    Location:
    Gloucestershire
    A 300mm pipe?! That would be some trencher!
     
  15. Steevo

    Steevo Member

    Location:
    Gloucestershire
    It will mainly be conveying water that enters the ditch from other pipes etc. Less so general ground water, but there would be no harm in perforating the pipe to do so. I can't see it would have a negative effect doing so.

    Sounds like clean stone is the best option then. By fabric liner - terram?
     
  16. Lincsman

    Lincsman Member

    Location:
    Lincolnshire
    Not really, its common the lay that size when you are herringboning 40 acres into one pipe, it does mean a different pipe box and swap a few cutters though.
     
  17. middle level here wont let you pipe a drain with less than 600mm dia pipe wanted to do one but that makes it v v expensive,,, funny thing apart from the one run off from the road there is never any water in the dyke
     
  18. For membrane, it is whatever you feel happy with. Teram is one option - but there are lots of different kinds to suit all pockets.
    For this application, I would not use a bio degradable one though :LOL:
     
    Steevo likes this.
  19. So what trencher are you using to lay the 300mm twin wall pipe, as it must be quite an impressive piece of kit? How much per mtr laid, and what backfill is used?
     
  20. Lincsman

    Lincsman Member

    Location:
    Lincolnshire
    Normal Mastenbroek type land drainer, its been a while since we drained like that as we now want all pipes to outfall into a ditch so they can be jetted and in the "day" it was clay pipes, twin wall would have to be put in the trench manually as its too rigid, the landcoil stuff only goes up to 200mm. You could run a 200mm each side of the ditch to pick up any old drains that maybe working a little.
    Only soil was ever the backfill as gravel would be too expensive due to the widened trench
     

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