Skip navigation

Hamburg Airport S-Bahn

As from 2007, the Hamburg Airport Fuhlsbüttel will be linked up with the S-Bahn network in the greater Hamburg area; the connection in an underground one from the suburb of Ohlsdorf. The two 1,750 m long tunnel tubes are being driven through sand, fine sand and glacial marl by means of a hydro-shield. Around the target shaft the minimum overburden amounts to 4 m with the greatest overburden attaining a depth of 35 m between the emergency exits Brombeerweg and Etzestraße. Much of the route runs below built-up areas. Furthermore, the Alster and a railway line have to be crossed. The maximum water pressure amounts to 3.0 bar. The tunnel is lined with coupled segmental rings (cam and packet system), which are 1.50 m wide and 40 cm thick. The segments are produced with conventional reinforcements. Each segment is provided with a galvanised fire protection mat within the concrete cover to protect it against spalling should there be a fire. The installation of the mass-spring system including the tunnel track is undertaken immediately after the completion of the tunnel tube in question. The 2 emergency exits are produced by automated means using the caisson construction method. The caissons are initially lowered step-by-step by mechanical means until they reach their final position at a depth of 40 m. Sinking is executed either by flushing or excavator depending on the geological conditions. Both methods are controlled automatically so that there is no need for crew to be deployed under compressed air. The connections to the tunnel tubes are produced with the help of subsoil freezing. In addition, a 108 m long tunnel, which crosses beneath the multi-lane bypass artery to Fuhlsbüttel Airport, has to be produced by cut-and-cover. The pit walls are mainly executed as diaphragm walls. The ground is excavated in sections and largely under water. After the installation of the base anchors, an underwater base invert will be produced. The 2-cell rectangular tunnel's roughwork will be undertaken by cut-and-cover with subsequent backfilling and restoration of the surface. Apart from the freezing measures around the cross-passages, far reaching soil stabilisation operations using jet grouting are to be carried out. The soil around the starting and target shafts will be replaced to safeguard the tunnelling operations.


  • Country: Germany
  • Region: Hamburg
  • Tunnel utilization: Traffic
  • Type of utilization: Underground, urban and rapid transit
  • Client: Free and Hanseatic City of Hamburg, Authority for Construction and Transport Foundation Engineering Office
  • Consulting Engineer: Jörss-Biunck-Ordemann, DE Consult, Masuch + Olbrich
  • Examination: Baubehörde Hamburg, Prof. Dr.-Ing. B. Maidl, Prof. Duddek und Partner GmbH
  • Contractor: Hochtief Construction AG, Bilfinger Berger AG
  • Main construction method: Trenchless
  • Type of excavation: Shield machine (SM)
  • Lining: Reinforced concrete segments
  • No. of tubes: 2
  • Tunnel total length: 2 x 1,750 m
  • Cross-section: 36.3 m²
  • Contract Volume: approx. € 85 mill.
  • Construction start/end: May 2003 to February 2007
  • Opening: 2007