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RE: Counterfort Retaining Walls

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I have used them at times for building under grade on one side and exposed on the other and inadequate shear walls because I thought the deflection was more predictable – even though it is still largely a guessing game.

 

Roger C. Davis

Architect

 

 

205 N. Dewey St.

Eau Claire, WI 54703

P (715) 832-1605

F (715) 832-7850

 

-----Original Message-----
From: Avicpeng [mailto:vicpeng(--nospam--at)telus.net]
Sent: Thursday, September 29, 2005 8:57 AM
To: seaint(--nospam--at)seaint.org
Subject: Re: Counterfort Retaining Walls

 

That was my thought too.  The counterforts only help with stem dimensions.


Thor Tandy P.Eng MIStructE
Victoria, BC
Canada
vicpeng(--nospam--at)telus.net

----- Original Message -----

Sent: Thursday, September 29, 2005 4:43 AM

Subject: RE: Counterfort Retaining Walls

 

What is the advantage of a counterfort wall?  I have
never designed one as a cantilever wall always seems
more economical.
Gary


On 28 Sep 2005 at 9:51, Lutz, James wrote:

> For what it's worth, for a plate subject to hydrostatic loading, free
> at the top and fixed on the sides and base, the maximum moments in
> both directions will be about equal when the width of the plate is
> about 0.7H.  This is not necessarily an optimum counterfort spacing,
> because it doesn't consider the increasing cost of counterforts as the
> spacing is reduced. The load has to be carried somehow, and
> counterforts aren't cheap.
>
>    _____ 
>
> From: S. Gordin [mailto:mailbox(--nospam--at)sgeconsulting.com]
> Sent: Wednesday, September 28, 2005 8:41 AM
> To: seaint(--nospam--at)seaint.org
> Subject: Re: Counterfort Retaining Walls
>
>
> David,
>
> Bowles recommends counterfort spacing of 0.3 to 0.6H; H should be
> between 20 an 25 feet for the wall to be economical. Winterkorn & Fang
> recommend counterfort spacing of 0.33 to 0.5H.
>
> HTH
>
> Steve Gordin SE
> Irvine CA
>
>
> ----- Original Message -----
> From: M.  <mailto:davidfinley(--nospam--at)bizsea.rr.com> David Finley, P.E., P.A.
> To: Seaint(--nospam--at)Seaint.Org <mailto:Seaint(--nospam--at)Seaint.Org>  Sent: Wednesday,
> September 28, 2005 6:49 AM Subject: Counterfort Retaining Walls
>
> Is there a general rule of thumb for the length and spacing of
> counterforts on a counterfort retaining walls?
>
> David Finley
> M. David Finley, P.E., P.A.
> 2086 SW Main Boulevard - Suite 111
> Lake City, FL  32025
> 386-752-6400
>
>
>
>
>
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>



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