Copenhagen advances Cityringen extensions 20 May 2014
Peter Kenyon, TunnelTalk
The Hochtief/Züblin joint venture is awarded DKr2.1 billion (€310 million) underground construction of 1.8km twin running tunnels on the 3km North Harbour (Nordhavn) extension of Copenhagen’s Cityringen (Circle) Line.
Sydhavn approved 13 Feb 2015

Peter Kenyon, TunnelTalk

Unanimous and final parliamentary approval is granted for the twin tube South Harbour (Sydhavn) Cityringen metro extension in Copengahen, Denmark. The new extension, for which construction of a bifurcation shaft at Havnholmen is already under way, runs predominantly underground for its 6km connection with Ny Ellebjerg to the south of the city. A €1.15 billion funding agreement is already reached.

In anticipation of final parliamentary approval being granted for Sydhavn, Copenhagen metro operator and project owner, Metroselskabet, added construction of the shaft at Havnholmen to the scope of the €1.7 billion Cityringen contract held by the Salini Impregilo/Seli/Maire Tecnimont JV. The decision to construct the shaft concurrently with ongoing construction of Cityringen, which is scheduled for construction completion in 2019, is taken to minimize disruption when the new line needs to break in to the existing metro system. Sydhavn is scheduled for completion in 2023, four years after Cityringen opens to the public.

Fig 1. North and South Harbour extensions

Fig 1. North and South Harbour extensions

Fig 2. 1.8km of 3km Nordhavn extension

Fig 2. 1.8km of 3km Nordhavn extension

News of contract award on the North Harbour extension comes as the Danish Government and Copenhagen City Council announces a funding agreement of DKr8.6 billion (€1.15 billion) for construction of the mostly underground 6km South Harbour (Sydhavn) extension – which will now be submitted for Parliamentary approval.
The new connection to the new 200-hectare mega-development at North Harbour is to be excavated by TBM and is scheduled to open in 2019, a year after Cityringen is completed. It will take the line out to the ferry port area to the north of the city where a huge commercial and residential building development that will eventually accommodate 40,000 people is currently taking place (Fig 3). A brand new star-shaped United Nations building is also in the locality. The 60-month contract, awarded by the part state and part city-owned Copenhagen Metro operator Metroselskabet, comprises:
Fig 3. 200 hectare North Harbour development

Fig 3. 200 hectare North Harbour development

  • Excavation of a launch shaft at Nordhavn
  • 1,800m of twin running TBM bored tunnels of not less than 4.9m i.d.
  • Connection with Cityringen at a crossover cavern under the lake at Sortedams Sø (that is being excavated as part of the main Cityringen Project currently under construction by the Salini/Maire Tecnimont/Seli JV (Figs 1 and 2))
  • Construction of an underground Metro station at Nordhavn
  • A 350m cut-and-cover and ramp section to take the line up to ground level out of Nordhavn Metro Station in readiness for an elevated section for continuation of the line to the terminus at Orientkaj
  • Construction of a ventilation shaft below Krausparken
The North Harbour extension contract – which specifies that either one or two TBMs can be used to drive the running tunnels – has been in tender design since 2012 by the Client’s planning advisor, the Ramboll/Arup joint venture with architectural firm KOBE as sub-consultant.
Hochtief/Züblin was among cut the three JVs that lined up to compete for the €1.7 billion contract to construct the 17km of twin running tunnels and 17 underground stations that comprise Copenhagen Metro’s main Cityringen Project. That contract was eventually awarded to the all-Italian Copenhagen Metro Team (CMT) JV comprising Salini, Maire Tecnimont and Seli, with Seli supplying and managing the operation of four 5.78m diameter EPBMs manufactured in partnership with Kawasaki of Japan.
Fig 4. 6km South Harbour metro extension

Fig 4. 6km South Harbour metro extension

South Harbour area

South Harbour area

Award of the North Harbour extension contract coincides with news that agreement has been reached between various state and city funding partners, and the city developer By og Havn (Port Authority), over the South Harbour extension to the south of the Cityringen Line. Project scope will comprise up to 6,000m of twin running TBM driven tunnels and five deep-level underground stations to connect a new at grade transport hub at Ny Ellebjerg with Copenhagen Central (H) Station, the Cityringen, and North Harbour (Fig 4). The project will connect many of the up-and-coming canal-based neighbourhoods of the old South Harbour district, once a centre for heavy manufacturing but now redeveloped as a huge residential and commercial area. It is also designed to relieve pressure on Copenhagen Central Station.
The new line will consist of five stops at Fisketorvet, Frederiksholmsløbet (where the station will be built under the canal), Slusen, Mozarts Plads and Ny Ellebjerg – the first four of which will be underground – and is expected to contribute to the reduction of traffic congestion and generate growth and jobs in the city.
If approved the project is expected to begin in 2017 and open in 2023.
Milestone achievement for Cityringen TunnelTalk, Feb 2015
EPBM excavation of Copenhagen Cityringen TunnelTalk, May 2013
Four EPBMs selected for Cityringen drivesTunnelTalk, January 2011
Copenhagen metro contract awardTunnelTalk, December 2010

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