Railway bridge at Brugg
Coordinates: 47 ° 29 '0 " N , 8 ° 11' 46" E ; CH1903: 657090 / 259436
| Brugg-Umiken railway bridge | ||
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| use | Bözberg route | |
| Crossing of | Aare | |
| place | Brugg | |
| construction | Box girder made of reinforced concrete | |
| Number of openings | 5 | |
| Longest span | 58 m | |
| opening | August 2, 1875 | |
| location | ||
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On the railway bridge near Brugg , the Bözberg line of the SBB crosses the Aare west of the city center of Brugg . The large structure is one of the most important bridges in the Swiss canton of Aargau .
During the construction of the Bözberg line, the point at the western end of the Brugg Aare gorge was best suited to lead the route from Brugg train station to the eastern portal of the Bözberg tunnel. In the 19th century, the building site was in the area of the former municipalities of Altenburg and Umiken , which merged with the city of Brugg in 1901 and 2010, respectively. Since then, the Aare bridge has been in the urban area of Brugg.
The Bözberg line was built jointly by the Swiss Central Railway Company and the Nordostbahn and opened on August 2, 1875.
The Aare Bridge is formed by a 235 meter long viaduct with five openings in a curve, to which a long embankment connects on the right side of the Aare to the vicinity of the Brugg train station. The radius of the bridge curve is 480 meters. The rail track rises slightly from Brugg to Umiken, because this is where the access ramp to the Bözberg tunnel begins. The abutment and pillars of the viaduct are built with limestone blocks made from Mägenwil lime and from the Egerkingen quarry in the canton of Solothurn. The two river piers stand on solid rock in the Aare river bed. Halfway up, a pedestrian walkway suspended from wire ropes leads through arched openings in the bridge piers over the Aare. The Bözbergstrasse crosses under the railway line between Brugg and Umiken directly next to the viaduct in a brick underpass. The road from Brugg to Altenburg runs to the right of the Aare through the first viaduct opening. The headwater canal of the former Brugg power station , which went into operation in 1892, was also located under the bridge .
The original viaduct from 1875 consisted of brick pillars made of bossed ashlar masonry and steel Pauli girders . These initially only carried one track, while the pillars were already designed for two tracks. The steel framework was supplied by the construction company H. Gubser u. Comp. in Wil.
When the Bözberg line was expanded to double lane, the SBB replaced the trusses of the first bridge with a two-lane construction made of semi-parabolic girders from 1904 to 1905 . When planning, the implementation of a stone arch bridge was also considered. In 1903, the SBB's board of directors decided to have the new bridge built as a steel structure and awarded the construction contract to the steel construction company Wartmann & Vallette in Brugg and the Conrad Zschokke corporation in Aarau and Döttingen . On November 1, 1904, the first bridge lane was put into operation, whereupon the Pauli girders of the earlier line could be broken off. On May 1, 1905, the SBB also put the second lane over the bridge into operation.
Due to the greater load from new freight trains, the new construction standards from 1986 and to reduce noise emissions, a hollow box prestressed concrete bridge was built on the existing pillars in 1995 to replace the older bridge. Their foundations were reinforced because the new bridge is several times heavier than the previous steel lattice girders. After the steel bridges were demolished in July and November 1995, the two halves of the bridge, concreted on auxiliary piers, were pushed onto the renovated piers.
literature
- Gregor Tomasi: The three Aare bridges between Brugg and Umiken (1875/1905/1995). In: Brugger Neujahrsblätter , 1996, pp. 111–132.
Web links
Individual evidence
- ^ The new railway bridge near Brugg (Aargau) . In: Schweizerische Bauzeitung . tape 41 , 1903, pp. 154-156 , doi : 10.5169 / seals-23977 .
- ^ The new railway bridge at Brugg (Aargau) . In: Schweizerische Bauzeitung . tape 42 , 1903, pp. 38-39 , doi : 10.5169 / seals-24017 .