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Re: Vibro-replacement/stone column

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We used this on a school that was right next to the Jordan River here in
town.  I wasn't the project engineer (or even the drafter), so I can't
help you much.  However the people that used it spent a lot of time
evaluating options and came to the same conclusion.  So at least you
won't be the first.  Make sure you have a good working relationship with
your geotech, it will take a fair amount of teamwork to pull it off.

Jake Watson, E.I.T.
Salt Lake City, UT

> Dan Goodrich wrote:
> Hello,
> I am reading a geotech report for a high school gym.  Masonry
> bearing walls, and steel joists.  The report estimates
> a liquefaction settlement of appox. 10 to 15 in.  The geotech
> recommends using a deep pile/pier system, or a
> ground improvement technique called vibro-replacement, or
> stone columns.  The stone column idea appears to be a much
> simpler approach as far as the building is concerned.
> Has anybody had experience with this?  Pros? Cons?
> Was it very expensive?
> TIA.
> Dan Goodrich, P.E.
> Karren & Associates
> 3707 North Canyon Rd. Suite 8H
> Provo, Utah 84604

Jake Watson, E.I.T.
Salt Lake City, UT