Flood defence system with concrete retaining walls
Construction consortium Van Heteren, Jansen Venneboer and the Belgian company Aggeres Flood Solutions constructed the flood barrier in the historic centre of Spakenburg. Bosch Beton needed to develop a unique mould to match the chosen structure and the specific shape of the float. We produced an incredibly special U wall to safeguard the structure’s rigidity. The other quay walls were also made from Bosch Beton retaining walls. The retaining wall also provided the basis for the wall’s brickwork finish.
Van Heteren is well aware of our engineering and customisation specialisations and qualities as we already had a good relationship with this road and hydraulic engineering company. That’s why they decided to ask Bosch Beton to help with this complex flood defence system project.
A flood defence system can be needed in north-westerly force 11 storms that cause the water in the Eemmeer to surge into Spakenburg and run over the Oude Haven and the Nieuwe Haven quays. Now, the innovative and self-closing flood barrier activates automatically when water levels are high and, as the flood defence system is only visible at high water, the fishing village’s historic look has been retained. The floating flood defence system of 330 metres long was constructed in 2017.
The water helps
This innovative solution uses the help of the water itself. The sunken basin contains a floating retaining wall that rests on a 30-cm-wide float. There are openings on the water side. If the water reaches over 60 cm +NAP the gates open and the water can fill the basin. The retaining wall then floats upwards to protect the hinterland from flooding. Once the water level falls, the retaining wall falls with it.
>> View an explanation of the self-closing flood defence system here.
Annual test day
Waterschap Vallei en Veluwe Water tests the self-closing flood defence system in Spakenburg every year on the third Wednesday in September. The test attracts a lot of attention from passers-by, residents and other national and international interested parties. During the test, water board employees check that the system is working properly, the walls come straight up and there are no cracks or other defects, etc.
If you’d like to know more about this ingenious flood defence system read the article in De Ingenieur – Flexibele waterkering in Spakenburg
PROJECT IN THE PICTURE
5,600 m3 of forage storage for circular livestock farm in the Black Forest
The Hammer family started constructing a completely new farm on the outskirts of Egenhausen, in the German state of Baden-Württemberg in 2018. This laid the foundation for a truly future-proof farm. They chose 6 Bosch Beton silage clamps for their roughage storage.
Retaining walls form the basis for a new Danish recycling plant
Construction company NCC Danmark A/S used a huge number of retaining wall elements to construct a large and modern recycling plant in Helsingør, Denmark.
Silage clamp campaign winner reinvests in extra silage clamp
The Wesselingh family decided to reinvest the money they won in another silage clamp.
German bull farmer a Bosch Beton customer for over 12 years
Henrik Krone’s bull farm in Merzen-Westeroden is family-owned and has a long history. The Krone family has been a Bosch Beton customer for over 12 years now and in 2022 again opted for new Bosch Beton silage clamps to significantly increase their roughage storage.
Sustainable noise barriers on the A16 and N3
The ballast for these noise barriers is comprised of specially constructed retaining walls. Bosch Beton engineered a unique precast structure to enable Heijmans to realise this project.
Cement-free retaining walls for solar park Branderwal
Solar park Branderwal is one of the first customers in the Netherlands to use an entirely cement-free retaining wall solution.
Goat farmer invests in six new silage clamps
This farm opted to construct six Bosch Beton silage clamps to provide their goats with good-quality feed throughout the year.
Retaining walls create unique floor in villa
An architect used Bosch Beton retaining walls to create a unique construction solution for a basement floor, with daylight from two sides.
Retaining wall specials for ‘De Jonkvrouw’ in Geldrop
For the new ‘De Jonkvrouw’ apartment complex in Geldrop, we supplied special L-tile walls to accommodate height differences.
Retaining walls ensure safety at VU Amsterdam loading dock
The Vrije Universiteit in Amsterdam is a lot safer with the arrival of the new loading dock realised with retaining walls.