Makela_Cronvall:Layout 1 19/5/08 11:28 Page 8
NORTHERN EUROPE PROFILE: RHK & VR-TRACK LTD
The tunnel has been equipped with a
leaking antenna cable system that allows
links between the official GSM network
(VIRVE) and the GSM-R network.
Emergency phones will be located at
turning points and at intervals of 350
metres in the tunnel and in technical
facilities. Picking up a phone will
automatically connect it to the tunnel
control centre, which will be able to locate
the phone from which a connection
originates. If an emergency phone is
disconnected from the cable network, this
will send an alarm to the control centre.
The tunnel will have a field phone
network for the rescue department.
Ventilation will take place via the
portals of the tunnel when a train pushes a
column of air before it. Smoke exhaust
fans have been located at the portals of
the tunnel and at vertical shafts. Smoke
exhaust systems have been dimensioned
assuming that the air flow is 2 m/s and
that air changes at least three times an
hour in a tunnel segment. To ensure
smoke exhaust, the tunnel will have smoke
curtains that will allow the tunnel to be
Figure 9: Cross-section of the concrete tunnel section of the Savio tunnel
sectioned. Smoke curtains will be closed
manually and locked to the track
operating system has been connected to connection with access tunnels and structure. Ventilation during repair and
the 20 kV network from two directions, vertical shafts and at turning points in the maintenance work will be carried out with
so a defect in one direction will not cause longest tunnel segments. Power current smoke exhaust fans or auxiliary fans.
a long outage. The 20 kV wire has been distribution boards for maintenance and The tunnel will have an emergency
installed into the track substructure and rescue activities have been located at the earthing system to protect rescue and
fire protected. Transformers and main portals and at intervals of approximately maintenance activities. The system will
distribution boards have been located in 100 metres in the tunnel. ensure that electricity is turned off if
rescue department personnel have to enter
the tunnel during an emergency.
Grounding separators will be located in
connecting structures and the operating
panel will be on the side of the connecting
structure. The panel will have a display
that shows whether electricity has been
turned off.
The Savio railway tunnel will be
equipped with a fire hydrant network and
the fire water network will be a dry
network. Fire water stations will be
located at the portals of the tunnel and at
the top of vertical shafts for pressurising
and filling the network. Fire hydrants will
be located in the tunnel at intervals of
approximately 100 metres. Portable fire
extinguishers will be installed at pumping
Figure 10: Conceptual view of the door at the southern portal of the tunnel
plants, vertical shafts and distribution
36 EUROPEAN RAILWAY REVIEW
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ISSUE 3
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2008
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