ᐅ Earthworks – a few questions.

Created on: 13 Apr 2016 14:20
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daniels87
Hello,

excavation is scheduled for calendar week 24. The basement measures 8 by 11 meters (26 by 36 feet) with a rough construction height of 2.37 meters (7 feet 9 inches). I assume that the excavated material will be suitable for backfilling. Other houses in this development revealed sandy soil.

The ground is level and slightly below the planned future grade. Roughly calculated, I estimate about 270 cubic meters (9,530 cubic feet) of excavation. I think about 50 to 100 cubic meters (1,765 to 3,530 cubic feet) can be spread across the site to raise the level just above the street (a bit hard to say, since there are some dips in the plot).

The rest should preferably be taken directly to the disposal site at €16.50/m³ (including transport), since storing it on the neighboring property also incurs costs of €7.50/m³.

Where did you dispose of your excavation material, and what did you pay? I’ve registered in the county’s soil exchange, but I don’t think the chances are very good there.

We have set aside around €30,000 for additional foundation costs as a buffer (+€10,000 if needed for a waterproof basement, window well drainage, and perimeter drainage), but of course I want to keep costs as low as possible.

And does anyone have experience spreading excavation and topsoil? Is doing this work yourself even practical given the volume?

Good luck,
daniels87
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daniels87
14 Apr 2016 11:28
Per cubic meter of "loose volume," plus a loosening factor of 1.2 to 1.8 depending on soil conditions.