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Posted by Art on September 6, 2006, 10:54 am
Probably the best way of getting an idea of how to do the job right is to
visit the web sites of a few manufacturers of special blocks engineered for
retaining walls and see what is involved and then realized that your stone
wall has to be designed even better since it is not using engineered blocks.
Celtic and Anchor are 2 popular blocks. Or get a book on retaining walls
and hire an engineer. You will be surprised by how much is involved in
doing it right. The drainage gravel needs to be wrapped in special fabric
to keep dirt out. I also wrap the pipe too. And you will need horizontal
anchors (possible fabric) to keep the wall from coming down. Also when
considering wall height, the underground portion is counted so your wall
will be probably 4 feet high.
> My goal is to remove the slope that ends about a foot from the side of
> my barn which will allow for easier access around that side of the barn
> as well as drainage. My plan is to excavate the dirt up to 8ft from the
> barn wall and install a rock wall with drainage behind it. The wall
> will vary in height - at most 36" and allow the rain water to run into
> the drain and out to my ditch. The total length of the wall will be
> roughly 60ft. I was planning on excavating to level (if not slightly
> higher at the barn wall) and then dig down tocreating a 12" deep trench
> 12" wide against the earth wall. In the trench, I will lay down a
> couple inches of drainrock and then lay in the perfpipe (planning on
> 4"-6" pvc) fill with some more drain rock a few inches higher then lay
> down some mesh to keep dirt out of the pipe holes, then backfill with
> more drainrock. At this point, I would lay the first course of basalt
> quarry rock (2 man small's) just in front of the trench and backfill
> with mixed 5/8 minus. i would then repeat this setting the next course
> back somewhat towards the slope. More backfill and so on until the 36"
> height is met.
>
> My questions are how does this plan sound overall, is there anything
> you would do differently or add? Should I add any sort of landscape
> cloth behind the rocks or plastic to keep the water from seeping out or
> would that create too much pressure? On a wall of this height should I
> place any rocks perpendicular that would sit back to the ground
> formation and backfill over them? I guess this should add more strength
> to the wall..
>
> Thanks for any feedback,
> bigballer
>
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