Foundation; Trench - Graf SAPHIR 600 L Instrucciones De Instalación / Montaje Y Mantenimiento

6.1

Foundation

The following criteria must be verified prior to installation:
The structural suitability of the soil in accordance with DIN 18196
•
Maximum groundwater levels / drainage of the subsoil
•
Types of loading present, e.g. traffic load
•
Please note: HGV can only be driven over if a self-supporting, steel-reinforced concrete bridge is in-
stalled!
A soil survey should be requested from the local building authority to determine the physical properties of
the soil.
6.2

Trench

To ensure that sufficient working space is available, the base area of the trench must exceed the shaft
dimensions by over 300 mm on all sides. The distance from fixed structures must be at least 1000 mm.
Please note: If the trench depth is greater than 1250 mm, an embankment should be built in accordance
with DIN 4124. The foundation must be horizontal and even and must offer sufficient load-bearing capaci-
ty.
The trench must be deep enough that the maximum earth cover above the shaft (see 3 - Installation con-
ditions) is not exceeded. For the system to be usable all year round, the shaft and water-carrying parts
must be installed in a frost-free zone. The frost-free depth is usually around 600 mm - 800 mm; for accu-
rate information, please contact the responsible authority.
The substructure is made from a layer of compacted round gravel (grain 8/16, approx. 100 mm - 150 mm
thick).
6.2.1 Positioning on a slope, embankment etc.
If the shaft is installed in immediate proximity (less
than 5 m) to a slope, mound or embankment, a
statically calculated supporting wall must be con-
structed to bear the pressure of the soil. The wall
must exceed the shaft dimensions by at least
500 mm in all directions and must be at least
1000 mm away from the shaft.
6.2.2 Groundwater and cohesive (non-water-permeable) soils (e.g. loam)
If it is likely that the shafts will be submerged
deeper in groundwater than indicated in the table
below, sufficient drainage must be provided (for
max. submersion depths and required earth cover,
see table). In cohesive, non-water-permeable soils
we recommend installing drainage (e.g. ring drain-
age) for seepage water (not below driven-on
surfaces).
SAPHIR universal shaft
Max. submersion depth
Required earth cover (mm)
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6. Installation and assembly
600 l
430 mm
min. 300 max. 600
–
20 / 48
>1000
>300 <600
Max.
900 l
430 mm
min. 300 max. 600
–
Max.
1200 l
550 mm
min. 300 max. 600
–