Fredrikstad bridge ( Norwegian. Fredrikstadbrua ) - automobile bridge over the Glomma River in the city of Fredrikstad , Norway . It is part of the road number 110 (Riksvei 110), connects the western and eastern parts of the city. On average, 32,000 cars pass through the bridge per day [1] . The central arch span of 196 m is the largest among bridges of this design in Norway [2] . It is one of the symbols of Fredrikstad , because of its appearance the bridge is also called the "Silver Bridge" ( Norwegian Sølvbrua ). In 2008, the bridge and the round square on the eastern bank of the river were included in the list of cultural heritage sites of Norway [3] .
| Fredrikstad bridge | |
|---|---|
 | |
| Official name | Fredrikstadbrua |
| Application area | car, pedestrian |
| Crosses | Glomma River |
| Location | Fredrikstad , Norway |
| Design | |
| Type of construction | arched |
| Material | steel |
| Number of flights | 23 |
| Main span | 196 m |
| total length | 824 m |
| Bridge width | 13.4 m |
| Arch height above water | 39.5 m |
| Exploitation | |
| Opening | August 18, 1957 |
Content
History
The construction of a permanent bridge across the Glomma River began to be discussed in the 1920s. In 1925, the city council created an expert commission on the construction of the bridge [4] . A draft drawbridge was drawn up 200 meters from the existing ferry, but work was stopped due to the war [5] . In October 1953, the Fredrikstad City Council approved the project for the construction of a permanent bridge across the Glomma River, 650 meters above the existing ferry crossing. The project was developed by Sivilingeniør Elliot Strømme AS and Chr. Ostenfeld & W.Jønson [6] .
The construction was carried out by the Norwegian company F. Selmer AS and the German company Stahlbau Eggers (metal span) [5] . The construction of supports began in the spring of 1954, concreting was carried out using sliding formwork [7] . Due to the problem with the erection of the support on the western side of the river, the central span was increased from 180 to 196 m, the support on the eastern side was strengthened [4] . The installation of metal structures for the bridge began in the spring of 1956, metal structures were assembled on site, and a floating crane from Oslo was used to mount the arch. The grand opening of the bridge took place on August 18, 1957 in the presence of Crown Prince Olaf V.
In March 2004, an additional raised railing was installed on the bridge to prevent suicide. In 2016, the repair of the bridge began, which includes the repair of steel and reinforced concrete structures of the bridge, the replacement of railings and barriers, noise screens, the installation of new sidewalks and bicycle paths, the replacement of asphalt concrete pavement of the carriageway, the repair of the drainage system [1] .
Design
The bridge has 23 spans, the central arch span of 196 m is the largest among bridges of this design in Norway [2] . The channel part of the bridge is made in the form of a metal arch with a ride in the middle, side spans - reinforced concrete girders. The distance from the bottom of the span to the water is 39.5 m. The arrow to raise the arch above the river is 69 m, the distance between the arches is 14 m. The heels of the arches are 5 m above the water level. The carriageway is partially supported and partially suspended from the arches. The total weight of the metal structures is 1100 tons. The bridge supports are reinforced concrete, on a pile foundation. The total length of the bridge is 824 m, the width of the bridge is 13.4 m, including 2 sidewalks of 1.5 m each.
See also
- List of Norway's longest bridges
Notes
- ↑ 1 2 Omfattende rehabilitering av Fredrikstadbrua // Statens vegvesen (Norwegian)
- ↑ 1 2 Våre bruer, 2003 , p. 123.
- ↑ Cultural Heritage: Regulation on the Protection of Bridges administered by the Norwegian Road Administration (Norwegian)
- ↑ 1 2 Bru mellom Øst og Vest // Friheten. - Oslo, 1957. - August 17. - S. 34 . (Nor.)
- ↑ 1 2 “Et spenn av krefter” forener Fredrikstad // Halden Arbeiderblad. - 1959. - January 29. - S. 1-2 . (Nor.)
- ↑ Våre bruer, 2003 , p. 26, 121.
- ↑ Søylene reises til brua i Fredrikstad // Arbeiderbladet. - Oslo, 1954. - May 20. - S. 5 . (Nor.)
Literature
- J. Brun. Våre bruer. - Damm, 2003. - ISBN 82-496-0760-0 . (Nor.)
Links
- Cultural heritage: Regulation on the protection of bridges administered by the Norwegian Road Administration (Norwegian)
- Fredrikstad bru og rundkjøring //Kulturminnesøk.no (Norwegian)
- Fredrikstad bridge // Bridgeinfo.net
- Photos of the opening of the bridge on August 18, 1957