By relocating the B14 road, with a length of 3.6 km, to the eastern side of the Franz-Josefs Railway Line,
the city centre of Klosterneuburg will be relieved of transit traffic. Moreover, the road connection to
the new industrial areas will be improved.
One requirement of the project was that the access routes be kept open to the extended recreation areas
along the Danube. This made the construction of three tunnels along the project necessary. In addition to
this, the project includes the construction of seven bridges. One of the bridges, with a length of 220 m,
must be constructed on terrain with a steep slope.
The design included special challenges, such as the vicinity of the Danube and the Klosterneuburger
Durchstich (subject to the possibility of flooding), and the necessity of multiple crossings of the highly
used Franz-Josefs Railway Line.
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BGG Consult has been involved in the project since spring 2003, when the authorities required additional
geological and hydrogeologi-
cal investigations.
Based on the results of previous subsoil explorations and additional surveys, an expert's report was compiled
regarding the geology and hydrogeology of the project site. Furthermore, a report was prepared concerning the
numeric groundwater model calculations.
During the tender preparation phase, a geotechnical expert's report was compiled based on another subsoil
exploration campaign and on the final design of the project.
During construction, geological, hydrogeological and geotechnical consultation was provided.
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Trough structures:
Due to the high groundwater level, the three tunnels along the route require trough structures with lengths
of up to 500 m. Near the southern end of the project, a whole roundabout including its ramps is situated below
ground water. In order to control the uplift, a heavily reinforced bottom plate was necessary (see photo).
From an ecological point of view, it had to be guaranteed that the groundwater stream would not be interrupted
by the structure. The latter would have resulted in a negative impact on the hydrogeological situation and the
ground water wells. Consequently, extensive groundwater communication measures were planned and implemented
based on numeric groundwater model calculations.
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