Folie 1 - Wayss & Freytag Ingenieurbau AG

Diabolo Rail Project,
Brussels Airport,
Belgium
Brussels Airport
New high‐speed
railway line from
Brussels to Antwerp
South connection
to Brussels
Evacuation tunnel
North connection
to Antwerp
To encourage the future development of Brussels-
Zaventem as a business location, two infrastructure
projects have been initiated to enable
access to Zaventem international airport from the
north. This will add to the airport' s attractiveness
for passenger and goods traffic.
On the one hand, the Diabolo Rail Project
comprises the conversion of the existing dead-end
station at Zaventem international airport into a
through station and its connection to the new
high-speed railway line from Brussels to Antwerp,
which will be built in between the dual
carriageways of the E19 motorway.
Evacuation
shaft
Bored tunnels
On the other hand, the accessibility of Brucargo
freight airport will be improved by the
construction of additional entrance and slip roads
for the Cargo motorway bridge and the
construction of a new cyclist bridge, and a fly-over
enabling direct access to the Cargo area.
The core of the Diabolo Rail Project are two
machine-driven tunnels, each approx. 1,070 m in
length, driven under aircraft parking stands, the
most important runway of the airport and some
taxiways. A slurry-supported Mixshield TBM was
used to bore these two tunnels.
Slurry Mode

General Data
Client / Owner: Northern Diabolo nv (spc for railway part)
Via-Zaventem nv (spc for road part)
Infrabel (railway part)
Flemish Government, Administratie Wegen & Verkeer (road part)
Contractor: THV Dialink - a Joint Venture of CEI-De Meyer,
Wayss & Freytag Ingenieurbau AG, MBG, Vinci Construction
Grands Projets and Smet-Tunnelling
Design: Basic design: TucRail and Eurostation
Final design: - Bored tunnel: Wayss & Freytag Ingenieurbau AG - Techn. Dept.
- Civil works: Technum
Construction Time: 2007 - 2012
Contract Value: € 322 million
Contract Type: Fixed price (lump sum)
Technical Data, Tunnel
Type of tunnel: Two single-track underground
railway tunnels
Length of tunnel: 2 x 1,070 m
Inner diameter: 7.30 m
Outer diameter: 8.00 m
Min. radius: 600 m
Min. cover: 10 m
Max. cover: 13 m
Segment Design
Number of rings: 1,428 nos.
Ring split: 7 +1 keystone
Segment width: 1.50 m
Segment thickness: 0.35 m
Wayss & Freytag Ingenieurbau AG
Tunnelling Division
Eschborner Landstraße 130-132
D- 60489 Frankfurt am Main
TBM
TBM manufacturer: Herrenknecht
Type: Slurry shield
Diameter: 8.27 m
Length of TBM: 70 m (incl. backup)
Total weight of TBM: 876 t
Weight TBM/Backup: 451/425 t
Thrust cylinders: 2 x 14 nos.
Thrust force: 48,285 kN
Rotation speed: 0 - 2.13 rpm
Max. torque: 3,950 kNm
Max. operating pressure: 3.0 bar
Installed electr. power: 2,000 kW
Logistics: Rail transport
Material handling: Slurry circuit
(2,100 m³/h)
Geology
Geotechnical features: Brussels Sands (Quaternary sands with sandstone layers)
Max. hydrostatic pressure: 1.3 bar
Phone: +49 (0)69 7929400
Fax: +49 (0)69 7929491
tunnelbau@wf-ib.de
www.wf-ingbau.de