How bad is the condition of our building ground?

  • Erstellt am 2017-02-19 02:14:12

stefanc84

2017-02-19 02:14:12
  • #1
Hello everyone,

after years of searching, we have finally found a plot of land and also bought it relatively spontaneously (directly from the municipality). The experience of the past few years has taught us that we are too hesitant and maybe should just make a decision based on feeling once in a while.
Looking at the "naturally" created soil report only in hindsight, we wished we had stuck to our usual approach, thinking and examining so long until enough reasons were found not to buy [emoji6]
We wanted to build without a basement for cost reasons. The foundation recommendation describes non-load-bearing soil down to 2 meters depth and therefore recommends a strip foundation to that depth. Alternatively, an elastically bedded slab on ground exchanged at least 1.20 m deep beforehand. In addition, the soil is hardly permeable to water, barely backfillable, and we have about 1.5 m slope over 22 m. Of course, we already knew the latter before the purchase.
The matter has quite dampened our enthusiasm for building (together with a few other expensive surprises). But maybe we are perceiving it as worse than it really is? Is our soil perhaps just quite average, like many others have, and good building ground a rarity? Or would you consider returning the plot?

We have now requested quotes and are extremely curious how expensive this fun will be.
What actually determines whether you found with a strip foundation or soil replacement? What is preferable?

I am looking forward to your assessment/opinion.

Best regards

 

tomtom79

2017-02-19 08:12:00
  • #2
Everything that is sand is relatively bad!

Sand was also found with us, despite the report, in one corner, so the strip foundation had to be extended from 90cm to 1.5m. Additional costs approximately 4-5k Euros.
 

Knallkörper

2017-02-19 08:52:38
  • #3
I don't understand that. Such a strip foundation is extremely easy to construct. How can it cost several thousand euros?
 

tomtom79

2017-02-19 10:02:23
  • #4
Calculate the excavated soil that must be removed.

Then of course the structural engineer was called, who has to present a solution, he also charged about 300 euros etc. Additional costs for concrete.

So 4k is probably cheap.
 

Knallkörper

2017-02-19 10:16:49
  • #5
Hm.. I don't know. Seems too expensive to me. We have strip foundations between 1m and 1.20m. They were of course included in the static calculations and the first execution plans. We used the excavation elsewhere for backfilling. The foundations were also finished in 1 day.
 

tomtom79

2017-02-19 10:44:44
  • #6
Excavation for backfilling can be done, but it should not be done as it can still settle after years.
 

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