filling in trenches

Discussion in 'Irrigation' started by superintendent, Oct 24, 2012.

  1. superintendent

    superintendent LawnSite Senior Member
    Messages: 394

    How do yall fill in the trenches. Seem like my lines settle alot days later. I stomp them down. Like to know all yall do it
  2. mitchgo

    mitchgo LawnSite Silver Member
    Messages: 2,956

    I guess you should stomp down more?

    You aren't taking away dirt are you?

    Physically speaking if you insert a item into something ( Pipe into dirt) you are displacing the original compound no matter what.

    with the mere fact that it's almost impossible to compact dirt the same as it was. Simply digging up the ground and putting it back together generally displaces it ( To an amount thats usually not noticed)

    So generally you should have an overage of dirt. This isn't always the case. due to wash off .. pipe breaks.. hills ects..

    Typically you should compact dirt every 2-4 inches to get a good solid compaction

    good luck
  3. 1idejim

    1idejim LawnSite Fanatic
    Messages: 11,358

    my theory is that the more uncompacted material you have, the more settling will occur.

    You can't compact the sides or under the pipe so you have to really clean the ditch.

    I don't believe in stacking pipe either, the potential for voids is too great.

    I was required to jet plumbing ditches when i contract plumbed pools, they settled.

    The best luck that i have had is using the backfill blade that i made for my baretto. small lifts, water and compact, repeat until you can wheel roll.

    Other than that, dig the joint trenches with an excavator and maintain 6 in between pipes and wack it
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    Last edited: Oct 24, 2012
  4. Mike Leary

    Mike Leary LawnSite Fanatic
    Messages: 23,174

    Water-backfill, rake-off spoils, topdress, re-seed (if needed), mulch for germination.
  5. Mdirrigation

    Mdirrigation LawnSite Gold Member
    Messages: 3,794

    trenches ? People still do that ? Sounds like work to me .
  6. RhettMan

    RhettMan LawnSite Silver Member
    from Texas
    Messages: 2,630

    Its not work, my dad worked, he wore loafers and sat in a/c

    What do they do now?
  7. RhettMan

    RhettMan LawnSite Silver Member
    from Texas
    Messages: 2,630


    Does it make sense to "save the grass", or make a visit to the turf yard... every day?
  8. cjohn2000

    cjohn2000 LawnSite Senior Member
    Messages: 570

    If you are planning on putting the grass back that you cut out, then pack the dirt in the trench and leave a little bit of a crown in the middle of the trench. Now set your grass on top and use a tamper to settle it back to grade. The idea isn't to smash the grass into oblivion to get it flush. In my experience grass always settles in the middle otherwise.
  9. grassman177

    grassman177 LawnSite Fanatic
    Messages: 9,795

    i got to do alot of this during summer, ground was too hard for anything else. trencher would only go down 10 in max, most was about 8inches. 1800 ft of pipe. dirt was plentiful, till we had a hard rain that washed some anc compacted it all. had to bring dirt in to finish the job. that was alot of work
  10. Mdirrigation

    Mdirrigation LawnSite Gold Member
    Messages: 3,794

    well for the last 25 to 30 years around here the vibratory plow is used , Bought mine in 1983. I have used a trencher 5 or 6 times since 1983 , never for a complete system , only trenched where it was too dangerous to run the plow ( crossing a steep slope )

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