Berto van der Vis, owner of eponymous earth-moving company BC van der Vis, is in charge of Section North of the Juliana Canal. This work section poses an extra challenge given the enormous amount of contaminated silt. Berto: "It is constantly puzzling with the planning and equipment needed." Since mid-August last year, more than a hundred machines have been working daily on the [...]
Pile tip overestimated, shaft friction underestimated A pile system obtains its load-bearing capacity from a combination of the point force and the shaft friction. Current Dutch standards and guidelines historically rely too much on the point force. The shaft friction, on the other hand, is often significantly underestimated and, moreover, it is considerably disadvantaged by limiting the cone resistance. Unjustifiably, [...]
With a much higher attention value A crossing, bicycle traffic circle, bicycle suggestion lane or a 30 km/h zone is often executed in a different color (usually red) asphalt. In this way motorized traffic is alerted to the possible presence of vulnerable road users. However, applying two colors of asphalt is quite a job for the road builder on duty, as [...].
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