63 In the Netherlands, the traffic on main roads between Delft, Rotterdam and Zoetermeer has increased intensively. This is mainly due to developments of large-scale housing projects indicated locally as “Vinex”. Furthermore a great number of industrial areas are developed in the region. As a result, congestions on the roads occur more and more. The development of highway N470, has realized a new and safe connection between Delft and Zoetermeer and a link to Rotterdam. With this new highway, the existing surrounding roads become less congested. Description of the bridge, duoduct This bridge is designed by “architektenbureau Marius van den Wildenberg”, it was assigned by the Public Transport Department of the province of Zuid-Holland. In fact, this bridge consists of a bridge and an aqueduct, that is why it is called a ‘duoduct’. This structure bridges the highway N470 over the aqueduct, which itself bridges the “Windaassloot”, a water reservoir over another water reservoir “Groenblauwe Slinger”. This is a typical Dutch situation in the west of the Netherlands where different water systems exist, each at their own level. The aqueduct comprises of: • Sheet pile structures; • Concrete pile foundations; • Abutments and intermediate supports; • Aqueduct water containing structure over de substructures. The bridge structure comprises of: • Sheet pile structures; • Concrete pile structures; • Abutments and intermediate supports; • Bridge deck from prefab beams. Detail engineering We received from contractor Koop Tjuchem Betonbouw the assignment for the detail engineering of 7 bridges and tunnels, of which the duoduct was a part. This object was prepared in 3D with Allplan Engineering, based on 2D digital information. From 3D dimension and rebar models, the dimension and rebar models were generated as well as the bending schedules. In total 215 tons of rebar was modeled. In addition to the traditional dimension drawings, our offices provide our clients with isometric drawings that show the objects in 3D as well as a set of 3D views of rebar details, which have proven to be very useful to the rebar installation crew on site. Duoduct This bridge is situated in the new developed N70 in the west part of the Netherlands, it consists of a bridge on a highway over an aquaduct structure. The name ‘duoduct’ points out the unique nature of this structure, namely 2 different functions for integrated transport . With Allplan Engineering software, our offices prepared in 3D the dimension- and rebar drawings, based on 2D digital information. Client: Koop Tjuchem Betonbouw, the Netherlands. Rebar: 215 tons of rebar modeled. Duoduct
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