Fill up a diaphragm wall? - Single skins for a pond

[ladysmantle]

Hello-
I am constructing a raised brick pond, and building two single skins, stretcher bond, leaving a cavity of 135mm for the liner, underlay and pipework. It measures about 800 high from ground level.

Shouldn't I do some sort of reinforcement or backfill in the cavity order to keep this thing stable? It will be capped by a 400 w x 40mm thick sandstone coping.

Any advice is much appreciated!

[lutonlagerlout]

yes reinforced concrete would be handy for this type of thing,when its full there will be a lot of weight of water in this thingi cant quite understand how the liner will fit between the 2 skins of bwk,surely it needs to go underneeath as well??
regards LLL

[ladysmantle]

Thanks, I thought so.

Yes, the liner is laid flat on the concrete base, then the inner skin constructed (sitting right on top of the liner) then the liner folded up around the inner shell and finally the outer skin constructed. The liner is then tucked up under the capping/coping and trimmed. It means that the liner is not seen at all when the viewer looks into the water at the sidewalls.

[remus]

Yes thats just the way I built my pond last year. Stick the liner to the back of the inside skin, then fill the cavity with concrete. If you have any pipes or cables to run along the inside of the cavity leave a gap for them or put in some kind of ducting. This way they are hidden from view after the slabs go on the top.


Kevin.