Coen Tunnel
TOTAL IMMERSED LENGTH: 540 m
DEPTH AT BOTTOM OF STRUCTURE: 24 m
FABRICATION METHOD: In casting basin dredged for the purpose. All six sections were cast in one cycle
DEPTH AT BOTTOM OF STRUCTURE: 24 m
FABRICATION METHOD: In casting basin dredged for the purpose. All six sections were cast in one cycle
Amsterdam,
Netherlands
Ministry of Public Works, Rijkswaterstaat
Tunnel element & approaches: Aannemingsmaatschappij Hillen & Roosen B.V. Sinking & founding: Christiani & Nielsen N.V.
Locks and Weirs Division of Rijkswaterstaat with Christiani & Nielsen as consultants
90m
540m
24m
Project construction
1966-04-30
6
Two tubes; two lanes in each tube
7.74m
23.33m
In casting basin dredged for the purpose. All six sections
were cast in one cycle
were cast in one cycle
Outfitting was done partly at
the time of fabrication in the
basin and partly at the
outfitting jetty in the flooded
basin.
the time of fabrication in the
basin and partly at the
outfitting jetty in the flooded
basin.
Four pontoons were used to lower the sections. Towers for survey control and for
operations control and access were provided (one tower at each end of the elements)
operations control and access were provided (one tower at each end of the elements)
Gina-type gasket system
Asphalt bitumen covered with fiberglass was used to provide a waterproof covering
about 1 cm thick. This material was in turn covered with concrete, which was attached
to the main concrete box using ramset studs, each with special waterproof steel collars
about 1 cm thick. This material was in turn covered with concrete, which was attached
to the main concrete box using ramset studs, each with special waterproof steel collars
Placed on four temporary supports resting on pads of gravel and adjusted to grade,
using jacks. Sand was later jetted under the elements.
using jacks. Sand was later jetted under the elements.
Reinforced