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RE: Stepping Basement Type Retaining Wall

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Will-

If you’re looking into this, it’s textbook counterfort walls.  When you get to the lower sections you can omit the counterforts.

Candi Anderson, P.E. 

-----Original Message-----
From: Will Haynes [mailto:gtg740p(--nospam--at)hotmail.com]
Sent: Friday, August 05, 2005 7:26 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Stepping Basement Type Retaining Wall

 

I will look at doing that.

thanks

Will


From:  Markajohn(--nospam--at)cs.com
Reply-To:  <seaint(--nospam--at)seaint.org>
To:  seaint(--nospam--at)seaint.org
Subject:  RE: Stepping Basement Type Retaining Wall
Date:  Thu, 04 Aug 2005 22:53:11 -0400
>Will,
>
>Have you considered putting, say, 5' x 1' wing walls (perpendicular to the retaining wall and almost full height) on the outside of the retaining wall to act as stiffeners every 10' or so.  The Retainign wall could span horizontally between them and it ought to cut way down on the deflection.  No new foundation types or pile rigs either.
>
>MJ
>
>
>
>"Will Haynes" <gtg740p(--nospam--at)hotmail.com> wrote:
>
> >
> >
> >We were advised by the geotech to use Geopiers at this site for cost efficiency. I don't want to introduce another foundations system unless I have to. Everyone is already complaining about having to use the Geopiers as it is. Even if it costs less to use the piles for the wall, I think it is going to be a big issue to introduce them now.
> >
> >
> >
> >thanks,
> >
> >Will
> >
> >
> >gt;From: "Sharon Robertson" lt;sharon@arconengineers.comgt;
> >gt;Reply-To: lt;seaint@seaint.orggt;
> >gt;To: lt;seaint@seaint.orggt;
> >gt;Subject: RE: Stepping Basement Type Retaining Wall
> >gt;Date: Thu, 4 Aug 2005 11:06:45 -0700
> >gt;
> >gt;Will,
> >gt;
> >gt;Have you considered using soldier beams (piles) and spanning the wall
> >gt;horizontally?
> >gt;
> >gt;Sharon
> >gt;nbsp;nbsp; -----Original Message-----
> >gt;nbsp;nbsp; From: Will Haynes [mailto:gtg740p(--nospam--at)hotmail.com]
> >gt;nbsp;nbsp; Sent: Thursday, August 04, 2005 10:48 AM
> >gt;nbsp;nbsp; To: seaint(--nospam--at)seaint.org
> >gt;nbsp;nbsp; Subject: Stepping Basement Type Retaining Wall
> >gt;
> >gt;
> >gt;nbsp;nbsp; I have about a 15'-0" retaining wall that will also be serving as a
> >gt;basement wall along part of one side of the building. I have had this
> >gt;situation before and just used the second floor diaphragm to brace the wall
> >gt;at the top. But this wall is a lot higher, and the top of this wall varies.
> >gt;I need to use this wall as a shearwall also.
> >gt;
> >gt;nbsp;nbsp; The floor framing will be composite steel beams. Has anbody had any
> >gt;success with designing the wall as a cantilever, letting it deflect, then
> >gt;attaching the framing after? I am afraid I am not going to properly predict
> >gt;the amount of deflection and end up with a problem. The geotech said the
> >gt;same.
> >gt;
> >gt;nbsp;nbsp; Again, the top of wall will not be constant. It will be at the second
> >gt;floor height for about 20 ft, then gradually drop down to about 5'-0" tall
> >gt;along that side. So I know I will have to use a cantilever type of design at
> >gt;the areas where it is below second floor level. (I will have columns that
> >gt;will be supported on this wall from above where it is lower than second
> >gt;floor level).
> >gt;
> >gt;nbsp;nbsp; I know I need to use a slotted connection at the steel to wall interface,
> >gt;to allow for adjustment for the deflection. But I am not sure how much of a
> >gt;slot to provide. The geotech guessed at about 4" of deflection at the top of
> >gt;the wall when it is at 15'-0" high. Any other suggestions to deal with this
> >gt;wall?
> >gt;
> >gt;
> >gt;
> >gt;nbsp;nbsp; Will
> >gt;
> >gt;
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