Inzending in categorie: Commerciële projecten
This project concerns the production and erection of the prefab elements of an office building in the heart of Brussels with 3 underground levels and 9 levels above zero. The range of applied prefab products is quite large: hollow core slabs, shuttering slabs, reinforced beams, prestressed beams,...
This project concerns the production and erection of the prefab elements of an office building in the heart of Brussels with 3 underground levels and 9 levels above zero. The range of applied prefab products is quite large: hollow core slabs, shuttering slabs, reinforced beams, prestressed beams, twin walls, load-bearing walls, round columns, rectangular columns, staircases and landings. As if this was not challenging enough, the structure had been originally conceived as cast in place concrete with little or no opening to prefab concrete. Nevertheless we succeeded in developing a complete prefab variant with a minimum amount of formwork to be placed by the general contractor.
For the erection of the building we had to look closely to the capacity of the crane, which could lift only 12 tons. In the Tekla model we could easily monitor this and decide which walls needed to be split in two or more pieces.
To get all the elements just in time on the building site, the production in four different production locations had to be coordinated with the progress of the erection team.
In the basement and ground floor of the building there is a car lift. At the front side of the car lift the foundations were not strong enough to withstand the reaction of a simple prefab solution. To overcome this problem, the heavily reinforced walls were connected to each other in such a way that the complete box of individual walls behaves as if it were cast as a whole.
Another challenge was found in the fact that several columns and load bearing walls were not continuous until the foundation, but stopped a few levels earlier. This leads to constructions where a load bearing wall is supported by a beam which is on its turn supported by a column that is standing on a cantilevering part of another wall. It becomes very hard to imagine how the vertical load finds its way to the foundation.
Despite of the high complexity, the project was finished in time and with an absolute minimum of errors. The reason for this succes is without any doubt that the complexity was acknowledged from the very start, not only by ourselves, but also by the general contractor and the engineering office. We assembled a team of our most experienced people to execute the project and most important of all we had enough time to prepare the model. There were 16 weeks between the start of the project and the start of the erection, whereas normally we would only get 12 weeks which is too short for complex structures.
Tekenaar: Dimitri Mortelmans
Project partners: Van Laere - Assar - Stedec - Hegge - Prefaco - Ergon