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Re: Counterfort Retaining Walls

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I do not know exactly, but logic would dictate that the spacing of the counterfort should be 3 times the height of the retaining wall, so that the forces in the walls may get reduced by a 2-way action of the retaining wall. A spacing more than that would still leave the wall at midspan (of the counterfort spacing) with all the forces for vertical dimension (cantilever moment or the propped cantilever moment as the case may be), thus defeating the purpose of providing a counterfort.
Pankaj Gupta
Structures Online
----- Original Message -----
Sent: Wednesday, September 28, 2005 7:19 PM
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