Angostura Bridge
8.1436361111111 - 63.598822222222Koordinaten: 8 ° 8 ' 37.1 "N, 63 ° 35' 55.8 " W
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The Puente de Angostura is a road bridge over the Orinoco River in Venezuela in Ciudad Bolívar. She was the first bridge over the Orinoco and has the largest wingspan of all bridges in South America.
Name
The name of the bridge is reminiscent of the earlier name of the city, 1764 at a narrow point of the Orinoco as Santo Tomé de Guayana de la Angostura del Orinoco: located (about Saint Thomas of Guiana at the constriction of the Orinoco ) and 1846 in honor of the national hero Simón Bolívar was renamed Ciudad Bolívar.
Location
The Puente de Angostura is around 5 km upstream from Ciudad Bolívar. The Orinoco is there only about 1000 m wide; at the narrowest, 700 m wide part of the river is the old town of Ciudad Bolívar. The bridge connects Ciudad Bolívar and thus the entire Bolivar state in the south of the river with the state of Anzoategui and northern Venezuela. It is a part of the four-lane, freeway -like national road 16 from El Tigre to Ciudad Bolívar.
The next bridge is the 120 road kilometers downstream stationary second bridge. Puente Orinoquia, opened in 2006, a cable-stayed bridge for road and rail transport 370 road kilometers upstream is built between Cabruta in the district of Las Mercedes in the state of Guárico and Caicara del Orinoco in the district Cedeño de Bolívar, the third bridge over the Orinoco, also and a cable-stayed bridge for road and rail traffic, which replace the up to two hour ferry 2015 is to be completed.
Description
The Puente de Angostura is a four-lane suspension bridge with a domed clear upward bridge deck. The clear height above the navigable Orinoco is 41 m at high tide and 57 m at low tide. On the bridge, the carriageways are separated only by a double center line on the road. The earlier toll requirement was abolished in 2008; the toll stations have since been used for different controls.
Your southern pylon standing on a 170 m into the river towering rocky ridge, the other standing in the river about 120 meters in front of a rocky spur on the north shore. The 119.20 -meter-high pylons stand on round concrete foundations. Your pillars of a steel box girder structure are connected by a cross bar designed as a round arch with each other only at the upper end.
The bridge has a span of 712 m in the main opening and each 280 m in the lateral openings, which extend to the clearly moved away from the shore anchor blocks. Its length between the anchor blocks is thus 1272 m, including the ramp bridges leading from the outside to the anchor blocks is 1678.50 meters long.
The track support is 16.60 m wide and consists of a 17 m high truss structure, which stiffens it against vibrations caused by wind and twists. The four lanes à 3,65 m are 14.6 m wide.
The 47 cm thick supporting cables obtained by the air spinning from each 7182 wires.
History
The planning and construction of the Puente de Angostura, a consortium was commissioned from the Venezuelan contractors Precomprimido CA and U.S. Steel was, had the American Bridge Company charged with the execution of the superstructure. The planning of the suspension bridge was carried out by Sverdrup & Parcel, which by the prestressed concrete ramp bridges Precomprimido. The foundation stone was laid on 19 December 1962 Rómulo Betancourt, the former President of Venezuela. On January 6, 1967, the bridge was opened by Raúl Leoni, the incumbent president at this time.
Between 2006 and 2013, the bridge was completely overhauled in three stages.