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RE: Frozen soil = disturbed earth?

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That is similar to what is done for the pipeline.  They keep the frozen soil frozen. 

Regards, Harold Sprague


 
> Date: Mon, 23 Mar 2009 11:42:15 -0800
> From: dmorris(--nospam--at)bbfm.com
> To: seaint(--nospam--at)seaint.org
> Subject: Re: Frozen soil = disturbed earth?
>
> Typically the concrete is protected by insulation blankets with heated
> air blown in. I was at a foundation job in Deadhorse at -20 degrees (F)
> and they had a movable heated shed that would move along the foundation
> line allowing the gravel pad that was placed upon the native soil to
> thaw and allow the foundation to be placed. The concrete would cure in
> the shed for a few days and then the shed would be moved along and the
> blankets and heated blown air added for another few days. The gravel
> pad (2 or more feet) and insulation is added to separate the native
> frozen soil from the heated building pad. Over time, the building will
> transmit heat to the permafrost and settlement will occur. To prevent
> this, air ducts are placed in the gravel pad to circulate cold air in
> the winter to keep the pad cold enough to prevent thawing of the native
> soil.
>
> Harold Sprague wrote:
> > Is the concrete protected from freezing?
> >
> > Regards, Harold Sprague
> >
> >
> >
> > > From: jkeyser(--nospam--at)lcmf.com
> > > To: Seaint(--nospam--at)seaint.org
> > > Date: Mon, 23 Mar 2009 08:19:17 -0800
> > > Subject: Re: Frozen soil = disturbed earth?
> > >
> > > The majority of our projects are in rural Alaska, and as such are
> > typically supported by permafrost. The key to this issue is the last
> > paragraph of IBC Section 1805.2, "Footings shall not bear on frozen
> > soil unless such frozen condition is of permanent character."
> > >
> > > Jared
> > >
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