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Who Will Design the World’s Longest
Immersed Tunnel for Road and Rail?
Arup, in joint venture with Rambøll and Tunnel
Engineering Consultants (TEC) will provide consul-
tancy services and technical support for the con-
struction of the world’s longest immersed tunnel
for road and rail of its kind, the Fehmarnbelt Fixed
Link.
Contracts have been signed with Femern A/S, the
Danish state-owned company responsible for the
planning of this international infrastructure project.
The tunnel will connect Rødbyhavn in Denmark
with Puttgarden in Germany. It will be the world’s
longest road and rail tunnel under water, with a
four lane motorway and a two-track railway. The
length of the immersed tunnel will come to 18km
and the tunnel depth will be more than 40m below
sea level at its deepest point.
This immersed tunnel solution is an excellent
example for innovative design, as it challenges
existing tunnel building standards. A pioneering
longitudinal ventilation system and state-of-the-art
safety and security features improve the overall
functionality of the construction.
The Rambøll-Arup-TEC joint venture has supplied
multidisciplinary planning services from preliminary
design through to the preparation of tender doc-
umentation, including conceptual and illustrative
design and will now provide consultancy services
and technical support for the construction phase.
Building works are expected to start as soon as
the German planning approval has been granted.
“When it comes to building the world’s longest
immersed tunnel, quality should be ‘best in class’
and we have no doubt that this is what our con-
sultants will deliver. Their role will be to advise and
challenge, so that we achieve the best possible
solutions.”
— Henrik Christensen, Technical Director, Femern
A/S
“We are pleased to continue working on the
world’s longest immersed tunnel of its kind, for
which our involvement commenced in 2009. Arup
has a great global tradition in large infrastruc-
ture projects, and in Denmark specifically, on the
Oresund Link to Sweden and now this landmark
tunnel to Germany.”
— Sandra Akmansoy, Director, Arup Denmark
Construction Leaders • May 2017
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