Vlake Tunnel
HEIGHT: 8.02 m
WIDTH: 29.80 m
TOTAL IMMERSED LENGTH: 250 m
DEPTH AT BOTTOM OF STRUCTURE: 17 m
FABRICATION METHOD: Casting basin next to tunnel site, later to become part of projected canal widening.
WIDTH: 29.80 m
TOTAL IMMERSED LENGTH: 250 m
DEPTH AT BOTTOM OF STRUCTURE: 17 m
FABRICATION METHOD: Casting basin next to tunnel site, later to become part of projected canal widening.
Zeeland,
Netherlands
Ministry of Public Works, Rijkswaterstaat
Kombinatie Vlake joint venture of Hollandsche Beton Maatschappij B.V., de Amsterdamse Ballast-Beton en Waterbouw N.V.
Locks and Weirs Division of Rijkswaterstaat
125m
250m
17m
Project construction
1975-04-30
2
Two tubes; three lanes each (two active, one breakdown)
8.02m
29.80m
Used cooling water in wall pours to reduce shrinkage cracking so that exterior
waterproofing membrane could be eliminated. First use of the sand-flow method,
whereby sand/water slurry is pumped under the element from internal ports.
waterproofing membrane could be eliminated. First use of the sand-flow method,
whereby sand/water slurry is pumped under the element from internal ports.
Casting basin next to tunnel site, later to become part of projected canal widening.
Transverse pontoons with two control and alignment towers. Three-point bearing
method used for alignment adjustment.
method used for alignment adjustment.
Shrinkage control and division of elements into shorter lengths of 21 m, post-tensioned
together. 6 mm steel plate provided in bottom of element.
together. 6 mm steel plate provided in bottom of element.
Sand-flow method (used for the first time on this project).
Reinforced