The Bridges of Porto - Technical Data
Manuel de Azeredo
 


Suspended B. Maria Pia B. Luís I B. Arrábida B. S.João B. Freixo B.
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 Suspended Bridge (1843-1887)  

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Description

Road Bridge crossing Douro River at Porto, Portugal (Now demolished)

Type of Construction

Metalic cables (iron laminated parallel wires); Wood deck; Masonry towers

Structural type

Suspended. 8 parallel cables (4+4)

Designer

Stanislas Bigot (Civil Engineer)

Constructor

Soc. Clarenges-Lucotte

Contract aspects

 

Beginning of Construction 

February 2, 1841

Inaugurated

February 17,1843

Overall Length

 

Span

170 m

Heigth (over the water level)

10.0 m

Deck width

6.0 m

 Total amount of iron

 

Cost

 

Images

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 Maria Pia Bridge (1877)  

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Description

Railway Bridge crossing Douro River at Porto, Portugal

Type of Construction

Metalic

Structural type

Double hinged arch

Designer

Théophile Seyrig and Gustave Eiffel

Constructor

G. Eiffel & Co.

Contract aspects

International tender. 4 competitors

Beginning of Construction 

January 5, 1876

Inaugurated

November 4, 1877

Overall Length

352.875 m

Arch span

160 m

Heigth (over the water level)

61.20 m

Deck width

6.0 m

 Total amount of iron

1600 ton (arch: 640 ton)

Cost (at construction time)

965 000 FF

Images

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Luís I Bridge (1886)  

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Description

Road Bridge crossing Douro River at Porto, Portugal

Type of Construction

Metalic

Structural type

Double hinged arch. Double decked.

Upper deck supported by the arch; Lower deck suspended

Designer

Théophile Seyrig 

Constructor

 Soc. Willebroeck (Belgium)

Contract aspects

International tender. 10 competitors, 12 proposals

Beginning of Construction 

 1881

Inaugurated

 1886

Overall Length

 391.25

Arch span

172 m

Arch chord

45.1 m

Heigth (over the water level)

 

Deck width

8.0 m

Total amount of iron

3045 ton

 Cost (at construction time)

 Esc. 369 000

Images

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 Arrábida Bridge (1963)  

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Description

Highway Bridge crossing Douro River at Porto, Portugal

Type of Construction

Reinforced concrete

Structural type

Fixed end arch

Designer

Edgar Cardoso

Constructor

Zagallo

Contract aspects

 

Beginning of Construction 

May, 1957

Inaugurated

June, 22 1963

Overall Length

614 m

Arch span

270m

Heigth (over the water level)

70 m

Deck width

25.0 m

 Total amount of concrete

Total amount of steel

Total amount of masonry

20 000 ton

2 250 ton

7 700 m3

Cost

Esc 126 000 000

Images

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 S. João Bridge (1991)  

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Description

Railway Bridge crossing Douro River at Porto, Portugal

Type of Construction

Pre-stressed Concrete

Structural type

Frame

Designer

Edgar Cardoso

Constructor

FERDOURO

Contract aspects

 

Beginning of Construction 

1984

Inaugurated

1991, June 24th

Overall Length

1140 m (without thermal joints!)

Main bridge length

500 m

Main span

250 m

Heigth (over the water level)

66 m (deck)

Deck width

12.00 m

 Total amount of iron

Common steel 18 100 ton

Principal pre-stress 22 000 000 tfm

Vertical pre-stress 2 100 000 tfm

External pre-stress 3 500 000 tfm

Total amount of concrete

110 000 m3

Images

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 Freixo Bridge (1994)  

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Description

Highway Bridge crossing Douro River at Porto, Portugal. In fact two twin bridges 705 m long connected only in the foundations and abutments.

Type of Construction

Prestressed concrete

Structural type

Frame (8 spans)

Designer

António Reis

Constructor

Ferdouro (Teixeira Duarte/Soares da Costa/OPCA)

Contract aspects

 

Beginning of Construction 

 

Inaugurated

1985

Overall Length

705 m

Main span

150 m

Heigth (over the water level)

~ 43.00 m

Deck width

36 m

 Total amount of iron

 

Cost

 

Images

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Last modification: December 15th, 1999


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