Technical specifications

Scope of work

  • 4 cooling water pipelines DN 3400
    with a length of 300 m each
  • 1 fish return pipeline DN 1200
    with a length of 300 m
  • start shaft: 30 m x 25 m x 15 m
    diaphragm walls with anchored underwater concrete slab
  • target shaft: 45 m x 11 m x 15 m
    – steel girder shoring with underwater concrete slab and pre-installed lean concrete block
    – dyke crossing structure:
    5 circular cells of secant bored piles (internal diameter approx. 7 m)
    – a tunnel drive through each circular cell

Construction method 

  • Pipe jacking using 2 slurry-supported tunnel boring machines
  • external diameter: 4.1 m
  • Jacking pipes: Composite pipes DN 3400
    consisting of a reinforced concrete pipe with an integrated HDPE pipe liner

Geology

  • Silty sand with bands of clay

 

 

 

General data

Project
New coal-fired power plant in Wilhelmshaven,
cooling water pipelines, Lot C121

Client
GDF SUEZ Energie Deutschland AG

Contractor 
Wayss & Freytag Ingenieurbau AG
in a joint venture

Construction period 
December 2009 – August 2011

Construction costs
€ 36 million

Utilisation
Water/ Sewerage
Type
Cooling water tunnel
Length
4 * 300 m
Construction Method
Pipe Jacking
Related Projects
Pipe Jacking under Leipzig Main Station
Pipe Jacking under Leipzig Main Station
Germany

During the construction of the Leipzig City Tunnel in the shopping centre under the station concourse of Leipzig Main station it was not possible to carry out any works from above ground. Therefore, two pilot tunnels were driven by pipe jacking so that vertical freezing bulkheads could be built.

Read more
Munich Underground, Line 3 North, Lot 2
Munich Underground, Line 3 North, Lot 2
Germany

The new underground line provides a connection between the Moosach district and the „Olympia” shopping centre which was also built by W&F Ingenieurbau.

Read more
Schuman-Josaphat Tunnel
Schuman-Josaphat Tunnel
Belgium

Tunnel construction in a very restricted area requires a multitude of construction methods to carry out the structure with as little interference as possible with the neighbourhood.

Read more

Cookies Policy

Our website uses cookies to improve your experience. Certain cookies can contain personal information. We deactivate Cookies, unless you allow Cooky usage.
Additional information

Allow Cookies
Do not allow cookies
Cookies Settings