First get in touch with you local BUILDING OFFICIAL. They will probably have some questions as to what you are doing and why. There may be some restrictions in your area as to height of retention and or the type of materials that can be used.
Next get with an engineer to design anything retaining over 2 feet of fill. It is MHO that ROCK WALLS SUCK! it is not a question of if they will fail, but when they will fail.
My first selection would be concrete if i had to do it myself. I would add a sealer to the earth side of the wall and porous material behind the wall for a minimum of 24" with drains at the base of the wall to allow for hydraulic relief.
JMHO, Hope this helps.
Terry
You can get a hold of your local Versa-lok retaining wall business and have them do a engineered planned wall for you. Then have the the landscaper affiliated with that business put it up. They will be able to tell you if it can be done.
A gravity retaining wall is a structure designed to retain soil or other materials in a sloped area through its own weight, without the need for additional reinforcement or anchoring. These walls rely on their mass and the force of gravity to counteract the pressure of the materials they are holding back.
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For Exercise.
Yes
To keep retaining walls from heaving or cracking, due to hydrostatic pressure, you need to have some release for this pressure. Typically, this is done by installing perforated drain pipe in a bed of gravel along the length of the wall, close to the bottom. The pipe should have 'T' joints and extend through the wall every 6'-8'.
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Poor drainage destroys most retaining walls. Build in drainage right in the wall from base to close to the top. A solid footer is necessary for tall walls otherwise they shift as the seasons change and walls collapse. All footers should extend below the frost line.
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nope!
You will need a permit in most cities.
I need some help building a retaining wall, where can one buy good quality materials to start to build a retaining wall.