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ditch retaining wall construction
I guess I'm going to be the 'new idea guy' today.
We have successfully used corrugated steel sheets for similar problems on golf courses for years now.
It is sort of like the stuff commonly used for agricultural buildings but heavier material. It has about a 2" - 3" square'ish rib pattern to it. You just stand it up in place and push it down into the soil with a B/H/ or loader. The next sheet interlocks, via a small overlap in the matching shape, with the next sheet as you go. It is normally cut to matching height and capped with a formed channel which is welded in place. Tie-backs consist of huge 'screws' about 8" in diameter and 4' - 8' (depending on height of wall) that are threaded back into native soils behind the wall. When finished the whole thing is back-filled. It can be installed vertically or leaned back up to 45 degrees. IT goes up fast and is very long life stuff.
Best of luck.
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ditch retaining wall construction
That makes things a little clearer, and yes I was thinking of sheetpile, but they also make it in lighter duty (thinner gauge) material, I have also used just plain galvanized (or painted for that matter) roofing for the same purpose, it works just fine and is CHEAP.
If you have relatively good access you could easily build yourself some plywood forms and have a readymix cement truck pour you some huge slabs about 4" thick and full of 6" steel mesh, basically big patio slabs. If you place a scrap of chain at the top corners picking them up and placing them with the FEL is real easy. You could either stand them up or just lean them against the bank. It will be a fast easy solution that you can go at your own pace with. You also have the option of colouring the concrete any colour you (or your wife) wishes.
Best of luck.
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ditch retaining wall construction
For rough calculations use 4,000 pounds per cubic yard of concrete.
If you want it broken down a little further, that would be 148.15 pounds per cubic foot, or 0.086 pounds per cubic inch.
If you use a 1,000 pound slab for instance as a maximum size limit (for lifting and carrying ease), and you want a 4" thick slab, 10' long, that would mean 4"x120"=480 SQUARE inches, 0.086 x 480 sq. in. = 41.28 pounds per running inch of slab (width-wise). 1,000# / 41.28 = ~24".
So a slab 10' long, 4" thick and 24" wide would weigh about 1,000 pounds plus a little for steel mesh.
Another consideration, for costing the project out, would be that a single yard of concrete would yield a slab 4" thick, 10' long and about 8' long.
Best of luck.
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ditch retaining wall construction
If you use rough cut lumber for the forms and spray the inside face of the form with concrete colouring product It would come out of the form already looking that way.
Most importantly, coloured concrete will be maintenance-free for life, the wood capping may not holdup well to debris coming downstream or be loosened by shifting of the wall.
Best of luck.
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