Almonte railway bridge

from Wikipedia, the free encyclopedia

Coordinates: 39 ° 41 ′ 11 "  N , 6 ° 27 ′ 39"  W

Almonte railway bridge
BW
Official name Viaducto sobre el río Almonte
use High-speed route
Crossing of Río Almonte (Alcántara Reservoir)
place near Cáceres , Extremadura
construction Concrete - arch bridge
overall length 996 m
width 14 m
Longest span 384 m
Arrow height 67.5 m
start of building 2011
completion 2016
planner Arenas y Asociados
location
Almonte Railway Bridge (Extremadura)
Almonte railway bridge

The Almonte-railway bridge , officially the Viaducto sobre el río Almonte is a concrete - arch bridge in the wake of the Spanish section of the planned high-speed railway Lisbon-Madrid .

location

The structure stands near Cáceres , Extremadura , and bridges the Río Almonte or the arm of the Alcántara reservoir in which the river rises. The double-decker bridge for the N-630 and the railway is located about 700 m to the northwest . About 10 km to the southeast, hidden behind the bends in the foot, are the two arches of the A-66 bridge . The Tajo Railway Bridge is 3.5 km further north on the same route .

description

The two-track, a total of 996 m long railway bridge consists of a reinforced concrete arch with a span of 384 m and a superstructure of an elevated pre-stressed concrete - concrete box . It is driven at up to 350 km / h.

The Almonte Railway Bridge is thus the largest concrete arch railway bridge in Europe and is only surpassed in China by the Qinglong Railway Bridge, also completed in 2016, over the Beipan Jiang in Guizhou Province and the Qiubei-Nanpanjiang Bridge in Yunnan .

It was designed by Arenas & Asociados and executed by a consortium of FCC Construcción and Conduril Engenharia. It had to be taken into account that the reservoir was not allowed to be impaired by the construction work or the completed bridge. The large arch therefore had to be built outside the reservoir and cantilevered with auxiliary anchoring and rotating tower cranes on the arch sections. The roadway girder was built from both sides with telescopic armor .

The reinforced concrete arch has a hollow cross-section, in which, for aerodynamic reasons, an octagonal rather than a rectangular cross-section was chosen. It is 6.0 m wide and 4.2 m high at the top and becomes steadily stronger towards the outside. After 105 m the arch forks; its two halves are supported on a 19 m wide abutment . The foundations of the two abutments are 24 m and 35 m long and 53 m and 48 m wide.

The bridge has a total of 22 piers (including the 8 uprights on the arch) 45 m apart (the uprights are 42 m apart). Both the pillars on land and the stands on the arch also have an octagonal hollow cross-section that tapers towards the top.

The track support consists of a prestressed concrete - concrete box with a constant height of 3.1 m, a 7.4 m wide deck plate and a 6.0 meter wide base plate. The deck slab cantilevers 3.3 m on both sides. It is 14 m wide, of which 10.1 m are accounted for by the two tracks, 0.2 m for the ballast retaining walls and 1.7 m for the sidewalks on both sides.

The pavement girder is only firmly connected to the apex of the arch in an area of ​​30 m, through which, in particular, the longitudinal forces due to braking are diverted from the pavement girder via the arch into the subsoil. Elastomer bearings are attached to the stands .

See also

Web links

Individual evidence

  1. ↑ Líneas de Alta Velocidad en servicio y en construcción - Línea de Alta Velocidad Madrid-Cáceres-Badajoz-frontera portuguesa on adif.es
  2. ↑ Línea de alta velocidad Madrid-Extremadura-Frontera Portuguesa
  3. ↑ a b The Art of Spanish Bridge Design: Almonte River Viaduct on the Princeton University website (English)
  4. ↑ HSR Viaduct over River Almonte on the website of Arenas & Asociados (English)
  5. ↑ Viaducto de Almonte on the FCC Construcción website
  6. ↑ a b Viaducto sobre il río Almonte on the adif website (Spanish)
  7. ↑ a b plan side views, floor plan and arched cross-sections
  8. ↑ Plan of the arch