What does this soil survey of the neighboring property tell me?

  • Erstellt am 2014-10-14 12:51:33

Tugi2o

2014-10-14 12:51:33
  • #1
Hello everyone,

I am in the process of buying a building plot in BW. It is located at approximately 326m above sea level, the neighboring property is 1m lower, so 325m above sea level. I want to build with a basement. I have received a soil report from the neighbor (borehole approx. 25m further south), which looks as follows...

What does the report mean for me????
0-0.05m: Clay: slightly stony, brown
-0.6m: Clay, silty, slightly fine sandy, yellow-brown, with many iron-manganese concretions
-0.8m: Silt, clayey, slightly fine sandy, brown, stiff
-2.15m: Clay, silty to slightly silty, stiff. Up to 1.5m yellow-brown, below yellow-brown-gray-blue marbled
-2.3m: Clay, gray-blue, stiff to soft, with bleached root residues,
-3.15m: Claystone, weathered to strongly weathered, yellow-brown-light gray to blue-gray marbled, at the top claystone structure only weakly recognizable, increasingly claystone fragments downward

Groundwater encountered from 3.2m

Thank you.
TuGi
 

Bauherren2014

2014-10-14 13:00:12
  • #2


That you should commission one yourself for your property!

Otherwise, there should actually be a foundation recommendation in your neighbor's geotechnical report.
Or is it a general report for the construction area?
 

Tugi2o

2014-10-14 13:13:29
  • #3
Yes...exactly...it is a general expert report for the construction area! I will definitely have one made before the purchase. But maybe someone can already tell me in advance what to expect...e.g. [Weiße Wanne] etc. Then it will probably be expensive for me...the building plot is expensive enough already...
 

Doc.Schnaggls

2014-10-14 13:52:21
  • #4
No one here will be able to tell you what your property looks like.
Take about EUR 800.00 in hand and have an expert report prepared for your property.
Then you will be on the safe side.
Our building plot has been in the family for 65 years and was built on for 64 years with a single-family house with a basement. The basement was a completely normal brick basement and always dry.
We still had a soil report done and found out that about 20 cm below the previous foundation there is a water-bearing layer. Therefore, we now need a white tank, as our basement sits a total of 30 cm deeper in the ground.
 

Wastl

2014-10-14 14:10:09
  • #5

If groundwater already appears at 3.2 meters, a waterproof concrete shell is very likely – keyword 100-year high water level – which will probably be somewhere around 2 meters and thus within your excavation depth.
This would also raise the question for me: groundwater heat pump, since the groundwater is so conveniently close.
Reading this, it initially sounds like additional foundation costs are to be expected due to a lack of soil bearing capacity – therefore (as my predecessors already wrote):
Have your own soil survey carried out.
 

klblb

2014-10-14 14:30:02
  • #6
How did the neighbor build? Soil replacement? Reinforced concrete slab? And he would also have to be below the expected highest groundwater level (zeHGW) and therefore require a [Weiße Wanne].
 

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