B33n, para. c, Tunnel Röhrenberg - Local construction supervision of shell construction

The construction project includes the expansion and new construction of the B33 between the Allensbach West junction and the Konstanz airfield. The construction is carried out as a two-lane, four-lane federal highway with a total of 3 enclosures (Röhrenberg Tunnel, Hegne Tunnel, Waldsiedlung Tunnel).

In section C of the construction project, in the immediate vicinity of the municipality of Allensbach, the 970 m long Röhrenberg tunnel is planned. The tunnel will be built using the cut-and-cover method and will later serve as a noise protection tunnel.

The 970 m long Röhrenberg Tunnel (km 19+430 to 20+400) is to be constructed as a 2-cell rectangular frame using the cut-and-cover method. The standard cross-section in the tunnel with 2 lanes in each direction corresponds to the RQ 31 t according to RABT.

The Freiburg Regional Council, Department of Roads and Transport, Building Department East (Department 47.2), is the responsible department for the construction project B33neu, Section C, Tunnel Röhrenberg (here shell construction).

To support the project team in Allensbach, the local construction supervision as well as the geotechnical documentation and control surveying for the shell construction work of the Röhrenberg tunnel including associated trades are to be awarded.