August 12, 2012

Tank Retaining Walls

The tank walls are now held against the pressure of the water contained within in.

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We have cables tying the top of the cistern walls together, to prevent them from splaying out, but we wanted to do something at the base, to withstand the pressure exerted by the water and prevent any potential blow-outs.

On the north, east and west walls, where space is not an issue, we stacked rocks about a foot and a half deep and tall against the sheet metal walls. We will cover these with earth.

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On the south side, which will be closest to the barn, we poured a concrete wall, reinforced with metal. We used remesh and black plastic for the form, so the wall has turned out with the remesh pattern cut into it. We made a metal bridge over the pipe outlet to protect it from the concrete and create an access arch. We will also have to reinforce the rock retaining wall that is below it, but that can wait.

It is now safe to add more water, as it is strong enough to withstand the full 7000 gallons that it can hold. This will serve as the water soure for the Food Web model

We made this tank square due to the liner we had, but circular is better, for so many reasons. The potable liner we have for the house system is round and we will begin on it in another couple of weeks, with full instructions of course. The main thing with round is that it is so much stronger, and with a couple of hat-bands on the outside, there is no need for added support.

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