Platform on concrete and steel in construction
In the coming years, the Netherlands will face one of the biggest infrastructure challenges ever. Thousands of bridges, tunnels, locks, and viaducts are approaching the end of their service life and require large-scale replacement or renovation. Gebr. Van Kessel, part of VolkerWessels, shows how technical knowledge, innovation, and collaboration are key to successfully completing this V&R task. “For engineering structures such as bridges and tunnels, simply closing them down is often not a viable option,” explains Johnny Blommers. “They are essential links in daily traffic and are used intensively. That is precisely why complete replacement is often not realistic, and we focus on extending their lifespan through smart and sustainable maintenance.”
An additional challenge is the impact of vibrations caused by passing traffic on, for example, the curing process of concrete. “This requires a customized approach. We actively collaborate with the client to determine what is technically feasible. By adding specific additives to the concrete, we can reduce its sensitivity to vibrations. We can also apply additional structures that limit the impact of vibrations on the bridge deck.”
“When reinforcing bridges, a thorough analysis is also essential in order to determine the right approach. For each structure, we examine which parts need to be reinforced or strengthened and which technique is most suitable for this. Sometimes we recommend the use of adhesive reinforcement, while in other cases it is better to demolish a specific concrete section in a controlled manner so that we can apply additional reinforcement. In this way, we ensure sustainable and safe reinforcement, tailored to the situation on site.”
“Virtually all of our techniques are aimed at extending the lifespan of engineering structures. To this end, we actively engage in dialogue with suppliers and work together to develop innovative solutions. A good example is our specialization in wood renovation, for which we are BRL certified. Instead of completely replacing a mooring post, we can remove the damaged part and fill it with epoxy, so that the structure can last for many more years. We are also making progress in the field of concrete reinforcement. To prevent rusting of reinforcing steel, we apply cathodic protection. This significantly extends the service life. In addition, we are researching alternative materials such as cementless concrete and are committed to emission-free implementation with electrically powered machines and vehicles.”
Road safety is a key consideration in every project. During inspections and work, the company considers potential risks and engages specialist partners where necessary. “Of course, it's not just about the safety of our employees, but also that of road users.”
What does Blommers believe is needed to effectively tackle the V&R challenge? “Good cooperation, because together we have all the knowledge we need. And it is important that all parties involved, including engineering firms and clients, communicate their questions and wishes clearly. Too often we see that specifications are beautifully elaborated, but practically unfeasible. Then valuable time and money have been lost. By working together at an early stage, you avoid frustration and delays.”
The strength of Gebr. Van Kessel lies precisely in this collaboration. As part of VolkerWessels, the company can count on the expertise of sister companies such as KWS, Vialis, and Van Hattum en Blankevoort. “This means we have all the necessary expertise in-house, from inspection to renovation and replacement. It is precisely this combination that makes us unique.” A current example is the major maintenance work on the Scheldt-Rhine connection, which will start shortly. Four bridges will be given a major facelift, and Rijkswaterstaat has awarded the contract to KWS Infra and Gebr. Van Kessel.
