The 7.8 km long, Asten - Linz high-performance railway section, required the addition of two tracks.
Among others, the construction of the following was necessary:
- 2 new railway stations
- 3 new or reconstruc-
ted railway stops - 5 pedestrian tunnels
- 3 brook bridges
3 new bridges across the Traun River- 2 railway overpasses
- 9 road or tram underpasses
- 16 retaining walls
Along the whole section, the new tracks run parallel and in close vicinity to the existing Western
Railway Line. Consequently, all the work had to be done in consideration of the traffic and in multiple
construction phases. This required numerous securing measures of building pits, parallel to the tracks.
Near the railway overpasses, up to six tracks already existed of which only one could be taken out of
service at any given time.
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BGG Consult was commissioned as the geotechnical and geohydrological consultant for both the planning
and construction phases. A subsoil exploration campaign was conducted and enquiries were made both on
the site and with the authorities. The results of these examinations were used to compile geotechnical
and geohydrological expert's reports required for the application of the construction permit, and
subsequently for the tender procedure.
During construction, BGG Consult was responsible, for example, to dimension, verify and examine on site,
numerous securing measures for the building pits. Furthermore, geotechnical measurements were planned
and supervised or carried out. Finally, the geological documentation and the hydrogeological preservation
of evidence were conducted.
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Bored pile wall AL150:
In order to make room for the straightening of the track, Mount Schilten had to be cut back. This
required a retaining structure, with a height of 14 m, directly besides the B1 federal road. A bored
pile wall design, anchored at three levels was developed in close cooperation with the planner. The
bored piles (Ø 120 cm) were spaced 2.4 m apart and the spaces between the piles were secured with
shotcrete. Up to three anchors were necessary for each anchoring level.
Due to the accurate assessment of the underground situation, the professional geological documentation
during construction, and the geotechnical surveillance (by means of inclinometers and geodetic measuring
points), the construction was completed without major problems. |