Hello everyone,
I’m new here. My name is Tobias, I’m 30 years old, and I work as an electronics technician.
That’s a bit about me.
Now for my first question.
It turns out that the soil on the plot is quite poor, meaning there is groundwater at about 1 meter (3 feet) depth, and solid ground only starts at 2.2 meters (7 feet).
The architect suggested that the best approach would be to place continuous strip footings under all the load-bearing walls. So, at those positions, excavate down to 2 meters (6.5 feet) and fill with concrete and steel reinforcement.
I have a few questions regarding this:
1. Has anyone had experience with such poor soil and possibly a high groundwater table and could share some tips?
2. Does the rest of the soil within the strip footing area also need to be excavated down to 2 meters (6.5 feet) and backfilled with gravel? Or would a depth of only 0.5 to 1 meter (1.5 to 3 feet) be sufficient in those areas?
3. Is it possible to roughly estimate the cost per cubic meter (cubic yard) for this type of work?
Thank you for your help.
I’m new here. My name is Tobias, I’m 30 years old, and I work as an electronics technician.
That’s a bit about me.
Now for my first question.
It turns out that the soil on the plot is quite poor, meaning there is groundwater at about 1 meter (3 feet) depth, and solid ground only starts at 2.2 meters (7 feet).
The architect suggested that the best approach would be to place continuous strip footings under all the load-bearing walls. So, at those positions, excavate down to 2 meters (6.5 feet) and fill with concrete and steel reinforcement.
I have a few questions regarding this:
1. Has anyone had experience with such poor soil and possibly a high groundwater table and could share some tips?
2. Does the rest of the soil within the strip footing area also need to be excavated down to 2 meters (6.5 feet) and backfilled with gravel? Or would a depth of only 0.5 to 1 meter (1.5 to 3 feet) be sufficient in those areas?
3. Is it possible to roughly estimate the cost per cubic meter (cubic yard) for this type of work?
Thank you for your help.
Try to get in touch with a geologist who prepares soil surveys. Maybe also consult the expert who prepared the current report.
If you otherwise like the property and would want to have it, go ahead and commission the survey now with the owner’s permission. If you buy the property, you would have to get this done anyway, and if not, the 1000€ probably saved you from a major loss.
If you otherwise like the property and would want to have it, go ahead and commission the survey now with the owner’s permission. If you buy the property, you would have to get this done anyway, and if not, the 1000€ probably saved you from a major loss.
T
Tobias8888819 Jan 2018 21:14Yes, that's correct. I have already obtained a cost estimate. Now I need to talk to the mayor to find out if I can carry out the survey beforehand.
Back to the strip foundation.
If the structural engineer agrees, should drainage pipes be installed directly under the slab foundation? Just to be on the safe side. Or do you have any other suggestions?
Thanks so far for the conversation.
Back to the strip foundation.
If the structural engineer agrees, should drainage pipes be installed directly under the slab foundation? Just to be on the safe side. Or do you have any other suggestions?
Thanks so far for the conversation.
You can’t really control groundwater with just drainage. How many hectares are you planning to dry out? Talk to the architect to see if a combination of deep foundations, embankments, and a gravel bed might be the best solution. The architect should also have an idea of the approximate costs. 95 (currency) per unit isn’t a high price. I think that’s reasonable if the location isn’t extremely difficult. Here, it was 115 (currency)—with 30 to 50 cm (12 to 20 inches) of topsoil, clay, silty veins, sandy veins. A basement is hardly advisable. Earthworks are also necessary. But with smart planning, you can still save some costs. And then there’s water 1.5 m (5 feet) below your floor level. So what.
Lumpi_LE schrieb:
A 2m (6.5 ft) high strip foundation is obviously nonsense... [...] The first option gets so expensive that you might seriously consider a basement. That would practically be a basement, just filled with soil and without a floor *scratches head*
Tobias88888 schrieb:
He meant that strip foundations can be built up to about 3m (10 ft) high. What does the architect do for a living, or what substances does he use to stimulate his spatial imagination?
By the way, I would spontaneously think more of piles than strips. But at least the structural engineer and the geologist seem to have more solid recommendations.
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