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RE: Strengthening soils under existing footing?

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I?m really not trying to ?push? their products, but the A.B. Chance systems
I mentioned have options that are specifically designed to be installed in
low-headroom conditions.  I used them on one interior project with pretty
good success.

They?ll even design the system for you for free ? you send them a sketch of
the area, the required loads, and the local soils information, and a P.E.
will size the piers and specify installation requirements.  You then put
this on your drawings.

Jason Kilgore
Leigh & O'Kane, LLC
Kansas City, Missouri
From: Jim Wilson [mailto:wilsonengineers(--nospam--at)] 
Sent: Thursday, July 29, 2004 10:53 PM
To: seaint(--nospam--at)
Subject: RE: Strengthening soils under existing footing?

Thanks for the contact.  There are few options since the column(s) are near
the center of a single story office/township building.  Piles are out of the
question - at least at this point in time.  Injection probably won't be
desirable either, but at least I'll know my limititations.
Jim W.

"Stuart, Matthew" <mstuart(--nospam--at)> wrote:
Grout injection can be expense. Contact Otto DeJager at Infrastructure
Repair Service  973-692-0002
D. Matthew Stuart, P.E., S.E.
Senior Project Manager
Schoor DePalma Engineers and Consultants
200 State Highway Nine
Manalapan, NJ 07726
732-577-9000 (Ext. 1283)
732-431-9428 (Fax)
908-309-8657 (Cell)
-----Original Message-----
From: Jim Wilson [mailto:wilsonengineers(--nospam--at)]
Sent: Thursday, July 29, 2004 2:31 PM
To: seaint(--nospam--at)
Subject: Strengthening soils under existing footing?
Has anyone considered a way to strengthen the soils under an existing
footing without disturbing much of the surrounding?  I am envisioning
pressure grouting through a 30" x 30" footing to the soil below to
effectively increase the bearing area.  Hmm...
The original design drawings ca. 1975 state a 4000psf soil capacity.  The
owner wants to add a penthouse/roof structure, but the soil bearing pressure
is limiting the ability to do so.  Its hardly practical to widen the
footings and add new columns centered on the new improved/footing.
Is grouting effective in this case, and is it even cost effective?  Any
Thanks in advance,
Jim Wilson, PE
Stroudsburg, PA
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