Strong in grout anchors, anchor piles and all related techniques

On the one hand, there is the contractor company De Vries Werkendam, founded in 1963, active in constructive Concrete and Hydraulic Engineering, both on land and on water. With permanent partners, De Vries Werkendam can meet major challenges, such as vibration-free installation and pulling of sheet pile walls up to 30 meters.

On the other hand, there is De Vries Titan, founded in 1999, which specializes in anchoring and foundation techniques. "Both companies are independent and at the same time cooperate a lot," says Hendrik van de Woestijne, business manager of De Vries Titan. "De Vries Werkendam operates mainly in the Netherlands and in the position of general contractor. De Vries Titan is active throughout Europe and acts mainly as a subcontractor."

Thousands of poles and anchors

In 2020, De Vries Titan's work included the Blankenburg connection, which connects the A20 near Vlaardingen and the A15 near Rozenburg with a new freeway, the A24. "The connection will be fully integrated into its surroundings," says Dammes Oldenburg, director of De Vries Werkendam and De Vries Titan. "The connection will feature a land tunnel on the north bank and a deep immersion tunnel under the Scheur. We drilled over 4,000 GEWI anchor piles to prevent floating of the1 future tunnel floor. Because of the enormous depth of the construction pit, the piles have lengths of over 60 meters. In addition, we drilled over 600 strand anchors that will hold the tunnel walls in place. To deliver this within a year, we sometimes worked with five drilling rigs at a time."

Enduringly innovative

De Vries Titan uses innovative techniques in the process. "We develop the techniques that the market is waiting for," says Van de Woestijne. "The sonic drilling technique, for example, characterized by a high-frequency vibration in the drill motor, which means it requires considerably less energy to drive the piles into the ground. The technique was already used in research drilling; we have made it suitable for foundation work with the drilling motor supplier. The drilling of strand anchors, with both double and single-tube drilling technology is also one of our specialties. Combined with our new sonic drilling technology, we can install these anchors with very little energy. In addition, this product saves a lot of steel: a significant CO2 reduction for the entire anchor chain."

Great sense of responsibility

Within its projects, De Vries Titan shows a great sense of responsibility. Thinking along with the customer is in the company's DNA. "We can hardly do anything else. We think along about the Plan of Action, we look for the best place for supply routes and find the method that causes the least inconvenience. That customer-oriented approach almost always turns out to be the most efficient approach as well. By acting not as an anchor supplier but as a contractor, we are more partner than subcontractor for our customers." 

De Vries Titan works with its own equipment, most of which meets the highest environmental standards. Because of the broad knowledge available within the company, it is increasingly in demand for large tenders. "There are also very few challenges in Construction and Infra that we can't handle," he says.