ᐅ Foundation for a 1.5-meter-high retaining wall made of large rectangular blocks.
Created on: 9 Mar 2019 07:40
T
Thierse
A retaining wall 1.5 meters high (5 feet) is to be built using large ashlar stones (shell limestone). What should the foundation look like in terms of depth and material?
These stones are very heavy; is a special foundation necessary, or would, for example, a 30 cm (12 inches) layer of crushed stone beneath be sufficient?
And is drainage required? Or is a layer of crushed stone behind the retaining wall enough?
These stones are very heavy; is a special foundation necessary, or would, for example, a 30 cm (12 inches) layer of crushed stone beneath be sufficient?
And is drainage required? Or is a layer of crushed stone behind the retaining wall enough?
H
hampshire14 Dec 2019 09:30Congratulations, that seems very affordable to me.
You think so? For what was "just" earthworks, I find it rather in the upper third range. In the end, it was just excavation, adding and compacting frost protection gravel, and later digging and connecting the drainage. Unfortunately, due to the poor soil conditions, it was the only acceptable option. We could have done a strip footing, but then we would have had to replace all the soil underneath as well. The slab was done by the general contractor.
H
hampshire14 Dec 2019 13:08KingSong schrieb:
You think so? Considering it was "just" earthworks, I would say it's already in the upper third range.Our foundation slab cost more than ten times that amount. Even without a basement.KingSong schrieb:
The foundation for the house is made exclusively of frost-protected gravel, compacted in layers. The minimum depth below the original ground level is 1m (3.3 ft), and due to the slope, at the deepest point we are about 2.40m (7.9 ft) deep. The entire earthworks including drainage and everything related cost us €24,000. That exactly answers my question. Thank you. I’m facing the same "problem" and am still uncertain whether perhaps an extended strip foundation could compensate for this height more cost-effectively.
hampshire schrieb:
We spent more than ten times that amount on the foundation slab alone. Even without a basement.You had over 240,000 euros just for earthworks and the foundation slab??? A quarter of a million???
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