Tunnels - Wayss & Freytag Ingenieurbau AG

Sluiskil Canal Crossing
The Netherlands
General Data:
Project: Sluiskil Canal Crossing,
twin-bore road tunnel under the Ghent-Terneuzen Canal
Client: Province of Zeeland [Provincie Zeeland], represented by BV Kanaal-kruising Sluiskil
Contractor: Wayss & Freytag Ingenieurbau AG
in a joint venture
Construction period: October 2010 to August 2015
Construction costs: € 208 million
Technical Data:
Scope of work: 2 parallel tunnel tubes, length: 1.15 km each, internal diameter: 10.10 m;
4 cross-passages;
2 ramp structures serving as start and/or target shafts;
2 intersections - East and West - consisting of bridge structures with 2 roundabouts each
Construction method: TBM tunnelling using a Hydroshield (slurry shield),
shield diameter: 11.32 m,
reinforced concrete segmental lining, wall thickness: 45 cm
Geology: Sand, silt, Boom Clay, sand containing glauconite
Ems-Dollard Crossing
The Netherlands
General Data:
Project: Ems-Dollard Crossing between
Germany and the Netherlands,
tunnel for a gas pipeline
Client: Nederlandse Gasunie
Contractor: Wayss & Freytag Ingenieurbau AG
in a joint venture
Construction period: June 2008 to September 2010
Construction costs: € 47 million
Technical Data:
Scope of work: Tunnel for a gas pipeline,
length: approx. 4,050 m,
internal diameter: 3.0 m;
start and target shaft;
installation of the gas pipeline in the
tunnel using the floating method and
subsequent backfill grouting of the
tunnel;
extensive soil investigation
Construction method: TBM tunnelling using a Hydroshield
(slurry shield),
shield diameter: 3.6 m;
steel fibre reinforced segmental lining,
wall thickness 25 cm
Geology: Potklei (local type of clay), sands, clays
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