Arch bridge over the river Adra

Last week the load test of the bridge over the Adra River in Almería, Spain, was carried out, once the main repair, reinforcement and widening of the structure carried out by the Spanish Ministerio de Transportes, Movilidad y Agenda Urbana had been completed.

IDEAM, .SA. has developed the detailed design of the reinforcement and widening of the structure, as well as the technical support to the Construction Management in the construction phase and the works have been carried out by ALVAC.

The Historic Bridge over the River Adra is a concrete arch with an upper deck formed by 2 triarticulated arches, with a free span of 44.00 m and a rise of 4.40, whose greatest singularity lies in being one of the few Spanish examples with Mesnager-type joints. The reinforcement works have consisted of a perimeter cladding of the arch section with self-compacting concrete, as well as the execution of a new lightweight concrete slab that, supported on the existing one, has allowed to reach a total width of 10.20 m in front of the 8.05 m of the original section. Outside the deck, this slab is extended in conventional concrete up to a micropile pile cap, in order to provide a suitable resistant mechanism for the seismic stresses of the structure.