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FRÄNKISCHE | IM MM SediPoint
4. Installation
4.8 Backfilling excavation pit
4.9 Installing the shaft cover
4.7 Tests before backfilling and impermeability test
Shaft covers and concrete support rings
are not included in the scope of delivery
of FRÄNKISCHE Rohrwerke and must
be supplied on site.
Cover and cone are generally load sepa-
rated, i.e., cone and extension pipe are
not subject to vertical forces from the free
cover bearing. The free bearing transfers
loads from the surface to the cover directly
to the load-bearing underground.
Install shaft covers according to DIN EN
124, CW 610, with ventilation openings,
installation according to design specifi-
cations. You may put support rings
according to DIN 4034 on a respective
bearing under the shaft cover. We
recommend using the BARD ring from
FRÄNKISCHE's range of accessories as
bearing.
The shaft cover can be placed on a
10-mm-thick mortar joint to avoid sta-
tionary loads between equalisation ring
and shaft cover. Create the bearing from
compacted bearing layer material (EV2
module ≥ 100 MN/m²) or in-situ concrete
of at least C 16/20. Avoid connections of
the bearing with the cone of the exten-
sion pipe by any means (use casing
aid!). Vertical loads may only be trans-
ferred to the load-bearing underground.
The cone can be cut to length as
specified in Section 4.4.
Before backfilling the excavation pit,
check the system for proper installation
and leak-tightness.
The following tests must be performed
in particular:
Backfill the excavation pit according to
design specifications. Compact material
layer by layer. Comply with DIN EN 1610
and/or country-specific regulations.
Make sure to compact the area around
the extension pipe evenly and do not
shift the pipe while doing so.
Height of the shaft according
to design specifications
Exact adjustment
of the shaft
Check for damage,
foreign objects or
coarse contamination
Impermeability test
1
3
4
2
Attention!
We recommend having the system
approved by the site management
before backfilling.
4.9.1 SediPoint
