The Triplets Bridges | |
|---|---|
 Bridge view | |
| Coordinates | 16°30′59″S 68°07′06″W / 16.516272°S 68.118217°W |
| Carries | Motor vehicles |
| Crosses | Choqueyapu River and its ravines |
| Locale | La Paz, Bolivia |
| Official name | Independencia, Libertad, Union |
| Maintained by | Envigado Municipality |
| Characteristics | |
| Design | Extradosed bridge[1] |
| Material | Concrete |
| Total length | Overall length 644 m (2,113 ft)[1] |
| Width | 14.8 m (49 ft)[1] |
| Longest span | 113.5 m (372 ft)[1] |
| No. of spans | 3 |
| History | |
| Designer | Pedelta Structural Engineers |
| Engineering design by | Juan A. Sobrino and Javier Jordán |
| Opened | November 2010 |
| Location | |
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Three consecutive Extradosed bridges are part of a north beltway of La Paz in Bolivia.
The project was funded by CAF (Corporación Andina de Fomento) through a credit to the Municipality in 2006. In 2007, the Municipal Government of La Paz awarded the design and construction of The Triplets Bridge Project to the JV “Consorcio Asociación Accidental Progreso”. As part of this contract, PEDELTA carried out the conceptual and final detailed design.
There was a preliminary design that defined three three-span cable-stayed bridges with central spans between 90 and 110 metres (300 and 360 ft) and two cable-stay planes, similar to another existing in the city: the Bridge of the Americas. After a study of alternatives, where the bridge should have a cable supported deck in order to fulfill the technical specifications of the contract, it was proposed to modify the structural type to improve the visual impact on the landscape of La Paz. Therefore, it was proposed an extradosed bridge type, which reduces the height of the pylon, and a single plane of stays to allow a more transparent view