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Immediately behind the socket, the 6 m long
ductile iron pipes each require a pile-mounted
support carrying a cradle of in-situ concrete. A
1 cm thick supporting neoprene lining was inset
into the cradle to act as a sliding and protective
layer for the vonRollgeoecopur pipes (Figs. 4
and 5). Three piles also formed the foundations
for each of the in-situ concrete inspection manholes
(Fig. 6).
The assembling of the DN 700 fully protected
ductile iron pipes began at the lowest point
of the new pipeline (at the “bottom” socket) to
allow the pumped water to be fed straight into
the new pipeline when the wellpoint equipment
was changed over. Once again, there was a
convincing demonstration to everyone involved
of the ease of assembly of ductile iron pipes.
Last winter, in 2011, the pipeline was laid without
a break at very low temperatures of –10 °C
(Fig. 7).
The consulting engineers and the installing
company were impressed to see how easily and
quickly, and therefore how cost-effectively the
work of assembling vonRollgeoecopur pipes
is with the vonRollhydrotight push-in joints
(Fig. 8). Using 90° tapping saddles, lateral inlets
were very easy to connect in with no need for
the PUR coating to be peeled off (Fig. 9).
References
[1] Wikipedia, Seeland (Switzerland)
http://en.wikipedia.org/wiki/Seeland_
(Switzerland)
[2] Soil survey by Ingenieurbüro E.
Hunziker, Ins
[3] EN 598
Ductile iron pipes, fittings, accessories and
their joints for sewerage applications –
Requirements and test methods
2007 + A1:2009
[4] SIA 190; SN 533190: 2000-07
Kanalisationen; Leitungen, Normal- und
Sonder bauwerke
2000-07-01
[5] EN 15655
Ductile iron pipes, fittings and accessories.
Internal polyurethane lining for pipes and
fittings.
Requirements and test methods
2009
[6] EN 15189
Ductile iron pipes, fittings and accessories.
External polyurethane coating for pipes.
Requirements and test methods
2006
Author
Dipl.-Ing. Roger Saner
vonRoll hydro (Suisse) ag
Von Roll-Strasse 24
4702 Oensingen, Switzerland
phone: +41 (0)62 / 3 88 12 37
E-mail: roger.saner@vonroll-hydro.ch
Client
fenaco
Areale und Technik
Martin Beutler
Erlachstrasse 5
3001 Berne, Switzerland
phone: +41 (0) 58 / 4 34 03 01
E-mail: martin.beutler@fenaco.com
Consulting engineers/planners
BSB + Partner
Ingenieure und Planer
Simon Friedli
Von Roll-Strasse 29
4702 Oensingen, Switzerland
phone: +41 (0) 62 / 3 88 38 38
E-mail: simon.friedli@bsb-partner.ch
Builders/pipeline installers
F. Gugger AG
Pascal Ackermann
Gampelenstrasse 71
3232 Ins, Switzerland
phone: +41 (0)32 / 3 13 19 12
E-mail: info@gugger-ag.ch
DUCTILE IRON PIPE SYSTEMS 23