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Re: Frost Heave

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Tod, and Forrest,

	There was a similar thread on this list about August 20 to 23 of last
year.  You may be able to access them from the archives.  If not I still
have the one reply I made plus the submission I replied to which I could
forward; but there were several other replies.

				Regards,

				H. Daryl Richardson

Forrest Braun wrote:
> 
> Todd
> 
> The equation below gives the basic information for frost heave
> potential.  For freezers as well as ice rinks and curling sheets, the
> potential for frost heave is a long term thing subject to heat flow
> through the underlying soils and insulation coupled with the
> availability of water or moisture in the underlying soils.  In the long
> term, actual ice lenses may build up under the freezer, drawing more
> moisture thus increasing the lens over time.  Therefore, for the
> stability of the floor, keeping the underlying soils in a thawed state
> is the best solution.  Adding insulation is usually not the best method
> except for small units since all the insulation does is slow the process
> down but does not stop it.  Recycling the waste heat from the
> compressors into the grade below insulation is one easy method and is
> quite common for ice rinks.
> 
> A potential source of information relative to heat flow in soils would
> be literature on permafrost or geotechnical aspects of frozen ground.
> The one that I have in my bookcase collecting duct is by Andersland and
> Anderson.  This one addresses the issue from the other direction but the
> process is the same.
> 
> > Fabio Zárate wrote:
> >
> > Dear Todd:
> >
> > All I´ m able to say is an equation from"Soil Mechanic  II" by Juarez
> > Badillo.
> >
> > The heave of the upper layer of soil caused by the frost action is:
> >
> > He= 0,10 x n x H
> >
> > n:  porosity = e / 1 + e ,      e: void ratio
> >
> > H: frost penetration whitin   the earth
> >
> > Fabio Zárate
> > Civil Structural Engineer
> > ZYZ Consultores
> > fzarate(--nospam--at)zyzconsultores.com
> >
> >
> > ----- Original Message -----
> > From: "Todd Hill" <toddhillse(--nospam--at)yahoo.com>
> > To: <seaint(--nospam--at)seaint.org>
> > Sent: Monday, March 11, 2002 4:00 PM
> > Subject: Frost Heave
> >
> > > Does anyone know of any publications and/or journal
> > > articles dealing with frost heave of footings and
> > > slabs for buildings that house large freezers? My
> > > company has done a couple of these with a cookbook
> > > procedure. When I ask questions about where the
> > > procedure came from, I get that old expression "we've
> > > always done it that way". I was going to see if there
> > > is anything out there to confirm this procedure.
> > > Thanks in advance,
> > >
> > > Todd Hill
> > >
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> 
> --
> ++++++++++++++++++++++++++
> Forrest T. Braun, P.E.
> BBFM Engineers, Inc.
> Ph (907)274-2236
> Fx (907)274-2520
> Anchorage, Alaska
> http://www.bbfm.com
> ++++++++++++++++++++++++++
> 
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