Country: The Netherlands
Type: Storm surge barrier
For the Eastern Scheldt Barrier, which was designed and built in the early eighties, the durability requirements were, for the first time, expressed in terms of time: a service life of 200 years. As this was not feasible for the concrete cover, a mean service life of around 85 years was accepted.
Future maintenance was also considered during the design stages.The 2 800 m-long storm surge barrier across the Eastern Scheldt is very impressive. In order to affect the natural tidal range as little as possible the barrier contains 62 openings that can be closed using steel sliding doors when there is an increased risk of flooding. During normal weather conditions the sliding doors are fixed in a raised position.
The complete barrier comprises 65 monolithic piers. The concrete piers are considered to be the backbone of the storm surge barrier, transferring the forces exerted by a storm to the foundation. Each pier was cast in several phases. The concrete composition of each phase contained 350 kg per cubic metre CEM III/B and the target water-cement ratio was 0,45. The concrete was actively cooled with cooling tubes to avoid thermal cracks.
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