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Posted by DanG on March 16, 2007, 7:27 am
I don't know about minimum requirements.
Are you looking for a solution? This will NOT be cheap or easy.
There are multiple solutions, but under the circumstances I think
you will need the input of a soils engineer. Traditional poured
in place retaining walls strong enough to resist the hillside
definitely must be engineered and will require major concrete
work. There are many more recent segmental block retaining
systems like:
http://www.keystonewalls.com/
Q&A section:
<http://www.keystonewalls.com/pages/DesignPro_pages/DP_consdtls.html>
Holding the new walls or saving the old might be helped by using
these:
http://www.earthanchor.com/mantaapp1.html
There is a new system that shoots soil nails into existing
hillsides without the traditional grouting. This system shoots 1
1/2" bolts 18' long. http://www.soilnaillauncher.com/
______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)
dgriff237@7cox.net
>A good friends house has a 3 tier retaining wall about 50' from
>their back door holding back about 30' of the hill. The problem I
>am describing is affecting (5) houses in the row.
> During a recent downpour the wall failed at the highest level
> and had
> the domino effect, the top fell, pushing level 2 down to level
> 1, etc.
> Needless to say it's a mess.
> After checking it out I found the retaining wall was build as an
> upsidedown V from decorative stone and motar, no metal
> reinforcement
> was found in the damaged wall. Furthermore all the weep holes,
> 4"
> PVC at the lowest level still had small pebbles in them and I
> found
> a small piece of paper indicating that NO water had ever come
> from them.
> As far as I can tell the backfill of each level was simply TX
> dirt with
> no stones etc to help drainage. To make matters worse my friends
> home
> is on the far right which happens to be at the lowest level of
> the slope from left to right.
> Where can I find some information in regards to min requirements
> for a wall like this?
> Thanks!
> JimD
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