use a granular backfill ~1 ft thick behind it, and a geotech material between rock and earth. Weep holes at ~10 ft.
If you want waterproof, use a stick-on membrane type. spray-on leaves pin-holes, but again, that may not be a problem. Also check out the mirafi products.
http://www.tencate.com/smartsite.dws?lang=en&id=1101
JDC
>>>
From: "DA ENGINEERING" <dnae@cox.net>
To: <seaint@seaint.org>
Date: 11/5/2007 3:54 PM
Subject: water proof
Hi
what the best way to water proof retaining wall and footing close to the beach
I designed the 12" retaining wall with 24" thick footing also acting as slab
no heel for retaining wall
water will up rise behind the wall
the contractor want to pour 6" mud slab over the water proof material
then pour the 24" footing
I did not like the idea
any one with idea let me know
Thanks
Dave A.
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