Civil Engineering Reference
In-Depth Information
- a westerly positioned route, towards Vlissingen. If this route was
selected, the ferry connection Kruiningen-Perkpolder could not be
discontinued.
At all the locations except at Vlissingen, it involved a more or less stable
shallow section in the Westerschelde which made combinations of tunnels,
dams and bridges possible.
Bridge-tunnel combination at Kruiningen-Perkpolder
The Ministry for Transport, Public Works and Water Management managed to
postpone the route selection by four years. In the spring of 1968 the contrac-
ting party 'Combinatie Westerschelde (CWS)' - the constructor of the Zeeland
Bridge - presented a plan for the financing, construction and operation of a
toll connection between Kruiningen and Perkpolder for 230 to 275 million
euro with a planned design and construction time of 6 to 8 years. As a result
of this plan and the completion of the route studies, the Minister of
Transport, Public Works and Water Management was more or less forced to
take a decision and stated his preference for the route between Kruiningen-
Perkpolder. This route was shorter and therefore cheaper than the preferred
route by the Province between Terneuzen and Ellewoutsdijk. Construction
would be able to commence in 1973.
The design by CWS consisted of an immersed tunnel measuring 1,980
metres (12 elements of 165 metres) under the northerly fairway, an artificial
island with a harbour and construction dock for the tunnel elements on
the shallows of Ossenisse, and a double box bridge measuring 1,290
metres long with a span of 160 metres over the southern branch-fairway.
The design was ready in 1972 but it appeared to be too expensive and that
is why the Directorate-General for Public Works and Water Management
undertook an optimisation adaptation. In this, the box bridge was replaced
Fig. 2.3a
Cross section of
immersed tunnel near
'Kruiningen-
Perkpolder'
(distances/dimensions
in millimetres)
Cable gallery
150
10 0
150
3,500
2,500
3,500
1,250
900
1,250
11,200
11,200
25,800
Fig. 2.3b
Longitudinal section
of immersed tunnel
near 'Kruiningen-
Perkpolder'
(distances/dimensions
in metres)
Immersed tunnel 1,572 m
North
South
6.50
11. 0 0
ahsl
2.23
msl
alsl
1.93
TE-9
TE-1
20.50
TE-2
TE-10
13.88
13.88
TE-3
TE-8
28.00
TE-4
TE-7
TE-5
TE-6
40.81
40.30
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