8
Diagrams of foundation pit base
Situation A
For pedestrian areas:
•
Use an underfill/bottom layer at least
300 mm thick.
•
The underfill/bottom layer must consist
of “non-cohesive” to “cohesive” mixed
soil (group G1 soil types as per ATV-
DVWK-A127).
•
The underfill/bottom layer must be lay-
ered and compacted to D
Pr
≥ 98%.
Fig. 6
Situation B
For vehicle traffic areas:
•
Compact the pit base according to the
requirements.
•
With group G1/G2 soil types as per
ATV-DVWK-A 127 (soil groups GE,
GW, GI, SE, SW, SI, GU, GT, SU, ST
as per DIN 18196):
•
Lay a concrete load-bearing layer at
least 100 mm thick (tamped concrete,
strength class ≥ C8/10).
Fig. 7
Fig. 8
Situation C
For vehicle traffic areas:
•
With group G3 soil types as per ATV-
DVWK-A 127 (soil groups GU*, GT*,
SU*, ST*, UL, UM as per DIN 18196):
•
With group G1 soil types, use an
underfill as per ATV-DVWK-A 127.
Minimum thickness 200 mm. The
underfill must be layered and
compacted to D
pr
≥ 98%.
•
Lay a concrete load-bearing layer at
least 100 mm thick (tamped concrete,
strength class ≥ C8/10).
