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Re: Foundation on Expansive Clay -- Recap

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Fountain,

Can you bill your client for your time spent in this peer review? <grin>



-----Original Message-----
From: Fountain Conner <fconner(--nospam--at)pcola.gulf.net>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Thursday, April 05, 2001 5:11 PM
Subject: Foundation on Expansive Clay -- Recap


>
>'Love it...
>
>Posting a question to this list is like throwing a hand-grenade into a
>confetti factory.
>
>Recap:
>
>Foundations for bark blowline in a paper mill.  Spacing 70 ft max,
>supporting 18" diameter blowline 20 ft above grade.  Soil -- high
>blow-count (n = 20+) silty/sandy clay with "potential for expansion".
>
>My first cut was a drilled pier, setting an oversize sleeve in the
>foundation, and plumbing and placing the mast later.  The spread footing
>worked out cheaper until I found out about the "potential for expansion".
>
>'Lots of good suggestions -- I have gone back to a single drilled pier for
>each support, setting a 2 foot long piece of 18" pipe in the top as a
>sleeve for the 12" diameter mast.  There's no potential for uplift, and the
>top of the mast can be a little high, because I'm hanging off the side with
>a bracket that we'll set to proper elevation & weld in place.  The pipe
>will be hung with a threaded rod and a pipe collar which will give a "fine
>adjustment" to the pipe elevation.  Yes, it's eccentric, but the load is
>not too large.
>
>On the comments:
>
>1.  To Padmanabhan Rajendran -- What would flyash do to relieve the
>expansion?
>
>2.  For David Finley -- There shouldn't be much potential for caving.
>
>3.  For Eric Green -- 'No trees here.  This is a paper mill; they'd make
>paper out of a tree if they had one ;-)
>
>4.  For James Lane -- Lime stabilization (related to 1, above) might work,
>but I'd prefer to keep it simple.
>
>5.  For Bill Polhemus -- You recognized that I went "full circle", didn't
>you.  "Blessed are they who run around in circles, for they shall be known
>as 'wheels'."  If, however you want to use the three-sided wheel, you'll
>have to get clearance from Harold Sprague
>
>Again, thanks to all,
>
>Fountain
>
>