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Well Pointing

Discussion in 'General Industry Questions' started by Stump Knocker, Oct 5, 2014.

  1. Stump Knocker

    Stump Knocker Well-Known Member

    Joined:
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    Occupation:
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    Deltona,Fl.
    What's the most unusual place you have had to well point?

    STUMP KNOCKER
     
  2. Shimmy1

    Shimmy1 Senior Member

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    Location:
    North Dakota
    What do you mean? Drill a well?
     
  3. GregD1

    GregD1 Well-Known Member

    Joined:
    Oct 6, 2013
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    Occupation:
    Equipment for a paving contractor
    Location:
    Tonopah, Az.
    Are you talking about sucking underground water on the job untill they get enough of the structure up and it is capable of stabilizing itself in place ?
     
  4. Stump Knocker

    Stump Knocker Well-Known Member

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    Deltona,Fl.
  5. grandpa

    grandpa Senior Member

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    Location:
    northern minnesota
    Had a job once doing the dirtwork at a dam site. Moretrench out of Chicago was handling the well points and dewatering 17 feet below the water line. They had 102 points down hooked to a big manifold with two pumps going 24/7. I had excavated down to grade and the concrete boys were to start with forms in the morning.
    The engineer on the project had design a coffer dam upstream to handle the river. The dam didn't hold letting the raging river come down on the project. Everything was a loss! I had two cats onsite. Had to take a canoe out to them. As blind luck would have it, we had parked the cats on a high spot. We got the cats out by driving thru the current, but everything else on the construction site was a total loss. There were some buildings onsite that ended up with 5 feet of water inside.
    Moretrench delivered a totally new dewatering system onsite and we started all over again. To make a long story short we finished that project a year later. And then another year of lawsuits.
    The engineer responsible for the coffer design was also going thru a divorce at the same time of the lawsuits and commited suicide. Im glad that job is behind me.
     
  6. GregD1

    GregD1 Well-Known Member

    Joined:
    Oct 6, 2013
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    Occupation:
    Equipment for a paving contractor
    Location:
    Tonopah, Az.
    It wasn`t the most unusual location, but it was one of the worst. We had set the header pipe and points. They had been sucking water for a few weeks when the drill crews came in for the caisson holes. I think they were around 10` augers if I remember correctly. They had two cranes both with Caldwells set up on them. Don`t remember how deep the holes were, but they got the auger stuck one day and couldn`t get it out. They decided to pull the pin on the kelly bar and pull it with the crane. They lowered two Pile Drivers down in a basket with a torch to cut the bolt off the box. When they lit the torch, it blew out the hole like a Roman candle. They had hit a pocket of gas and the sniffers were in the trailer. One was dead when the basket got to the top, the other guy died a few days later.