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Draining A Retaining Wall

 
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Old 07-20-2011, 09:23 AM   #1
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Draining A Retaining Wall


Need to create adequate drain to place at base of a cmu retaining wall that is built on a stepped concrete footer (retaining wall slopes down a hill). Can I simply place 3" Drilled PVC at the base across each concrete step and backfill with gravel and landscape fabric, or do I need to create a "stepped" drain pipe (envisioning elbows at each step in the concrete)?
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Old 07-20-2011, 09:28 AM   #2
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Re: Draining A Retaining Wall


First off it should be engineered if it is a retaining wall.

We use 4" weeping pipe with a sock and use 45's not 90's at the steps.

We place the landscape cloth on the cut of the bank, start filling with gravel. If the wall exceeds 5' high I will run another weeper about halfway up....cheap insurance and helps keep the pressure off the wall.

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Old 07-20-2011, 09:29 AM   #3
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Re: Draining A Retaining Wall


Oh yea and waterproof the wall and use a dimpled membrane as well
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Old 09-12-2011, 04:00 PM   #4
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Re: Draining A Retaining Wall


We do the same except we dont use a sock only landscape fabric as a barrier between the rock and soil
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