Foundation wall is 9’-3”
tall. There is a basement slab on grade on the inside. It is
backfilled the height of the wall on the outside, minus the top
Sent: Friday, June 20, 2008 12:04
Subject: Re: Residential Foundation
I *assumed* it's a
In a message dated 6/20/08 11:01:53 AM,
I love these kinds of
things. I used to work for an veteran engineer who got these calls from
colleagues a lot.
is no lateral earth pressure on either side of the wall,
correct? Is there a SOG present on either side?
Sent: Friday, June 20, 2008 10:38
Subject: Residential Foundation
Got this call
earlier this week. Like to hear what everyone has to
It’s a residential
foundation, 9’-3” wall on top of 8” by 16” continuous footer.
Reinforcing unknown. The wall is actually tipping into the
building. Anchor bolts on the outside have broken the concrete out at
several locations. Soils report says it’s a sandy-clayey-silt.
Took samples from the surface and brought to another dirt-engineer who, at
sight and touch, believes it to be a lean or fat clay. *shrug*
Jury is still out on this one. Current landscaping is exposed backfill,
or NO landscaping at all. There is a perimeter sub-drain (one of those
perforated pipes surrounded by Styrofoam peanuts in a mesh sock) around the
base of the foundation. House, and wall where damage exists, is about
100 feet away from the base of a hill. There appears to be positive
drainage away from the house.
I have my own
suspicions as to what could have happened, but I am curious if anyone has run
into this on their end. Anyone? Anyone? Foundation damage
that I have typically seen is either settlement and heave.
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