Ponte da Arrábida
Coordinates: 41 ° 8 ′ 51 ″ N , 8 ° 38 ′ 25 ″ W.
| Ponte da Arrábida | ||
|---|---|---|
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| use | Road bridge | |
| Convicted | Motorway A1 , IC23 | |
| Crossing of | Douro | |
| place | Porto - Vila Nova de Gaia | |
| construction | Concrete arch bridge | |
| overall length | 493 m | |
| width | 26.5 m | |
| Longest span | 270 m | |
| Arrow height | 52 m | |
| Clear height | 70 m | |
| start of building | 1957 | |
| completion | 1963 | |
| planner | Edgar Cardoso | |
| location | ||
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The Ponte de Arrábida is a motorway bridge over the Douro between Porto and Vila Nova de Gaia , which crosses the A1 Autoestrada and at the same time the IC23 - Via de Cintura Interna , a 21 km expressway around the centers of the two cities.
It is named after the neighboring district of Porto.
It is the last bridge over the Douro before it flows into the Atlantic . The next bridge is the Ponte Dom Luís I near the historic old town, about 3 km upstream.
description
When the Ponte da Arrábida designed by Edgar Cardoso was completed in 1963, it was the largest reinforced concrete arch bridge in the world with a span of 270 m . The deck is a total of 493 m long and 26.5 m wide. It has a clear height of 70 m above the water level.
Originally, it had two lanes in each direction, separated by a concrete strip, and a bicycle and a sidewalk on both sides. Pedestrians could get to the bridge deck from the bank through elevators in the towers next to the bridge arch. The lanes now have three lanes in each direction, but only narrow emergency routes are available. The elevators are no longer there, but the five-meter-high bronze reliefs by Barata Feyo and Gustavo Bastos can still be seen on the elevator machine rooms on the bridge, depicting allegories of the hospitality of the city of Porto and the relationship between people and the rivers.
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Technical details
The bridge has two large, 8 m wide arched ribs made of two-cell reinforced concrete hollow boxes . They are 4.5 m high on the fighters and 3 m high in the apex. The arrow height is 50 m, which corresponds to an arrow ratio of 1: 5.4 with a span of 270 m. The arch boxes are connected to the upper and lower chords by a diamond frame made of reinforced concrete.
The roadway girder is raised by slender supports at a distance of 20 m, which are arranged in pairs on the two arched boxes. The carriageway girder is thus supported above the arch by 10 groups of 4 columns. The ends of the arch are flanked by two 4 m wide elevator towers, which are connected to each other by a strong crossbar.
The deck girder itself is a 26.5 m wide T-beam with 12 longitudinal girders, which are 1.80 m high at the supports and 1.10 m high between them. Two cross members are arranged between the supports.
history
The Ponte da Arrábida was built between 1957 and 1963. It was the first major bridge over the Douro to be entirely designed and built by Portuguese engineers and contractors.
The steel falsework for the first arched rib was erected up to the third points in the cantilever with bracing on the elevator towers. The middle segment was floated in and lifted in one piece. For the second arched rib, the entire falsework was moved across. A conventional falsework was set up on the arched ribs for the deck girder.
Casa Ponte da Arrábida
Cardoso had the Casa Ponte da Arrábida built as a construction office on the right bank of the Douros a little below the bridge ( ⊙ ), from which he had a good view of the construction going on. The small, architecturally appealing building has since been renovated and converted into a restaurant.
Web links
- Ponte da Arrábida. In: Structurae
- Design drawing : Elevation In: Documentos com referência a Ponte da Arrábida (Porto, Portugal) of the Arquivo Municipal do Porto
- A construção da Ponte da Arrábida em 20 históricas images. 20 historical photos of the construction of the bridge; on webook.pt
- Recorde a construção da Ponte da Arrábida 12 historical photos of the construction of the bridge; on jn.pt
Individual evidence
- ↑ a b Ponte da Arrábida on the website of the Patrimonio Cultural
- ^ Ponte da Arrábida. In: Structurae
- ↑ The length of 614.6 m, which is often read, obviously includes adjoining ramps on the motorway.
- ↑ See Google Street View
- ↑ a b Ponte da Arrábida sobre o Rio Douro on a2p.pt
- ↑ Sven Ewert: Bridges - The development of spans and systems . Ernst & Sohn, Berlin 2003, ISBN 3-433-01612-7 , pp. 200 ( limited preview in Google Book Search).
- ↑ Miguel Coelho: Casa Ponte da Arrábida on Mimoa.eu