Discipline: Civil engineering & infrastructure
Period: 2021 - ...
The Vilvoorde viaduct, one of Belgium’s iconic bridges, is part of the Brussels Ring Road (R0) and located in the district of Vilvoorde and Machelen. The work of art is currently undergoing reinforcement to make it last until 2078 and to allow the addition of an extra lane (in both directions). The extra lane is part of the ‘Werken aan de Ring’ programme.
The viaduct was built in 1976. The outer ring road, north section, and inner ring road (the south section) are separate and independent. Both are 20 m wide and comprise four different viaduct sections measuring a grand total of approximately 1700 m:
- Section A: mixed steel-concrete bridge (288m)
- Section B: hyperstatic steel box girder bridge (888m)
- Section C: mixed steel-concrete bridge (400m)
- Section D: hyperstatic post-tensioned concrete box girder bridge (130m)
In order to assess problems of fatigue in the Vilvoorde viaduct and similar constructions, SBE conducted a study in 2018. In doing so, SBE used, among other things, EE-software Ansys and a post-processing tool developed in-house. The road surface was analyzed according to different time and temperature parameters, such as the temperature-dependent load distribution of asphalt layers and time-dependent traffic simulations. Thanks to this research, an insight was acquired into the mathematical (remaining) life of the orthotropic road surface and its console connections and perpendicular supports on the body of the box girder. This revealed that certain aspects in the lane were past their mathematical limit. Based on these results, targeted follow-up procedures could be proposed and undertaken to improve the situation.
In addition to this study of all mathematical (remaining) life of the orthotropic road surface, it was necessary to study all sections of the viaduct (upper and lower construction) in accordance with the present standards and requirements.
Since March 2021, SBE has been conducting the assignment Framework agreement for technical support as part of the Design & Build assignment “Viaduct Vilvoorde” for De Werkvennootschap nv. For this task, we are collaborating with
- Sanacon bv for concrete repair;
- Mint nv for phasing, measures to reduce nuisance, and site planning;
- Royal HaskoningDHV bv for fatigue analysis and calculations, expertise relating to high-strength concrete and site supervision;
- Ghent University experts (professor Dr. Eng. Philippe van Bogaert, prof. Dr. Eng. Hans De Backer, prof. Dr. Eng. Wim De Waele) for fatigue analysis and calculations.
The task concerns providing advice and support with regard to the implementation of research activities and restoration and reinforcement work. The assignment will therefore include the following aspects:
- Follow-up and/or advice concerning the implementation of fatigue analysis and calculations;
- Follow-up and/or advice relating to strength calculations;
- Follow-up and/or advice relating to the implementation of the concrete research;
- Follow-up and/or advice concerning the phasing, measures to reduce nuisance, and site planning;
- Follow-up and/or advice relating to restoration and reinforcement work;
- Follow-up and/or advice relating to work to repair concrete and steel;
- Follow-up and/or advice relating to asphalt works;
- Follow-up and/or advice relating to laying of High Strength Concrete;
- Follow-up and/or advice relating to stability (calculations);
- Cost control and creation and/or inspection of proposed estimations;
- Diverse quality advice.