Frankenschnellweg NUREMBERg

Using BIM for infrastructure construction
Less traffic congestion, reduced environmental pollution and a green tunnel ceiling: the Nuremberg cityscape will undergo positive change over the coming years with the intersection-free upgrading of the Frankenschnellweg (Franken Freeway) between the city limits and the Dianaplatz (Diana Square). Schüßler-Plan was commissioned as part of a consortium to provide planning services for the tunnel and its associated drainage structures. The City of Nuremberg decided to employ the BIM method and is using it to implement a forward-looking recommendation by the Reform Commission for Major Projects of the German Federal Minister of Transport.

Planning services for tunnel and drainage structures
The construction scheme concerns the intersection-free upgrading of the Frankenschnellweg (FSW) in Nuremberg between Rothenburger Strasse and the Otto-Brenner Bridge. Along this section the FSW is divided into an underground and above-ground level. The underground level comprises the construction of an approx. 1,800m-long road tunnel using the open construction and mining method, with two structurally separated tubes and two traffic lanes in each direction. The above-ground level serves to take the incoming and outgoing traffic flows to/from the city. The project encompasses the reconstruction of the existing Rothenburger and Schwabacher road junctions with the Frankenschnellweg and the new construction of a 4-lane city access road (the 'Neue Kohlenhofstrasse').
In close coordination with the construction workflow of the tunnel, various drainage installations must be installed or modified. A total of three kilometres of noise barrier walls has been planned for the above-ground level.

Preparation and implementation of the BIM execution plan (BEP)
Unlike with structural engineering, the level of experience gained using the BIM planning method for infrastructure construction is generally not yet as extensive – particularly in Germany. The fundamental difference to structural engineering is the use of space curves in infrastructure planning. In a first step the client information requirements (CIR) were derived, with expert support from Prof. Borrmann (TU Munich). In a second step the BIM execution plan (BEP) was subsequently prepared, with Schüßler-Plan playing a key role here. This defines the applications and processes that are necessary for achieving these objectives.
To implement the BEP the existing structures, together with the structures undergoing planning – for example the tunnel and trough structure, supporting walls, existing bridge and tunnel structures – were created in 3D as partial or technical models. The planning of the above-ground traffic installations and the fundamental determination of the traffic phases during the construction period is being organised by the City of Nuremberg itself. This data is being transferred to a coordination model.

Client

City of Nürnberg, Service Öffentlicher Raum (SÖR)

Technical specifications

new construction of a road tunnel with a length of approx. 1,800m and a railway embankment crossing with a length of approx. 60m
reconstruction of the existing Rothenburger and Schwabacher road junctions with the Frankenschnellweg and the new construction of a 4-lane city access road

Services provided by Schüßler-Plan
Tunnel, shoring, noise barrier walls, supporting walls
Project planning for civil engineering structures; service phases 2, 3, 5, 6
Project planning for traffic installations; service phases 3, 5, 6
Structural planning; service phases 2, 3, 6
Services pursuant to construction site regulations

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BIM application cases
The following BIM application cases were performed on the basis of the 3D modelling in line with service phase 3:

  • Parametric modelling of the structural components necessary for preparing the tunnel model
  • Coordination of the technical models and conflict checks in terms of geometry and time
  • Quantity determination and cost calculation with verification of the plausibility of the quantity determination on the basis of the model
  • Derivation of the key structural plans from the consistent 3D model
  • Description of construction phases by linking the 3D model with the time schedule
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