Question about wall base and rain...

Discussion in 'Hardscaping' started by mrusk, Oct 24, 2005.

  1. mrusk

    mrusk LawnSite Gold Member
    Posts: 3,260

    Last week a dug out for a retaining wall. Then we got 2 inches of rain. I go back today and try to compact the soil so i could start putting in my base. The compactor just turned everything to much. The mud would just come up on the side and front of the compactor. Overall, the mush was proably only about an inch. In some areas it was more, in others it was less. Now we are suppose to get 2-3 inches of rain over the next 2-3 days. So i imagine the conditions on this job site will be worst by wednesday/thrusday. Whats the best way to get the soil to compact before i put my base agergate in? Waiting a week for the ground to dry out is not an option. We have rain of some sorta on the forcast for every other day for the next 10 days.

    The yard some have some draingae issues that i am addressing.

    Matt
     
  2. sheshovel

    sheshovel LawnSite Fanatic
    Posts: 5,112

    If the 1" had not drained in one week,I would venture to say that it's already pretty compacted,throw in your base and compact again.
     
  3. mrusk

    mrusk LawnSite Gold Member
    Posts: 3,260

    It lasted rain saturday. Not 1 week ago. I did think the soil was compact before it rained.

    Matt
     
  4. sheshovel

    sheshovel LawnSite Fanatic
    Posts: 5,112

    If the water does not soak in in 24hrs I say its compacted
     
  5. neversatisfiedj

    neversatisfiedj LawnSite Bronze Member
    Posts: 1,028

    did you use geotextile ?
     
  6. mrusk

    mrusk LawnSite Gold Member
    Posts: 3,260

    I did not put any base material in the trench yet. I wanted to talk to you guys first. So no i did not use a geo textile. I will use one if you guys feel it is the way to go in this situation.

    Matt
     
  7. NNJLandman

    NNJLandman LawnSite Bronze Member
    Posts: 1,306

    Just through QP in there and compact the QP, around 4 inches of QP, youll be fine, we had the same problem but we just worked on.

    Jeff
     
  8. MarcusLndscp

    MarcusLndscp LawnSite Senior Member
    Posts: 634

    If your sub base feels firm and stable I would say go ahead and proceed with your base material. If all you have is an inch give or take a little of mud I think you will be fine. What you want to watch out for is a soil that you can actually see and feel move when you walk on it or run your plate on it. It will almost feel spongey. If the compactor wants to sink in the soil I would say you have a pretty good water problem. Your plate compactor will actually continue to pull water up and out of the soil the more you compact it making more of a mess. You without a doubt always want to use a fabric to seperate your base material from your existing soils. There have been instances that I have put in a gravel base and it still moved and felt "spongey". This means that you have an excess amount of water below the surface and it needs to come out. If you get your base in and compacted before the rain you will be fine. The rain may actually help your base material settle completely in which case you may want to re check your grades on it and shim the base with a bit of new material just to top it off to grade perfectly. What are your native soils like? Gravel? Sand? Clay? I can't remember where you're from but the drainage situation will also depend greatly on the type of soils you already have on site.
     
  9. cgland

    cgland LawnSite Bronze Member
    Posts: 1,929

    I would compact a larger "clean" stone into the subgrade to firm up the soil, then install a separation fabric and proceed as normal.

    Chris
     
  10. mrusk

    mrusk LawnSite Gold Member
    Posts: 3,260

    Well where getting hammered with rain now. Hopefully by thrusday i can get back to this job site. I'm going to compact some 3/4 crushed stone into the sub base, put down fabric, then procede with my base as normal. On this 80 ft wall, there was only about 5 feet that i would call spongy. There i will dig down untill i hit a decent sub base.

    Matt
     

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