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Restoration of Enrique Estevan Bridge

DESCRIPTION OF THE STRUCTURE

Enrique Estevan Bridge is located over the Tormes River in Salamanca, it was designed in 1898 by the engineer Saturnino Zufiaurre. It consists of six 220 m span steel arches with 10 m width. Both abutments and the piles are made of granite masonry. The structure was completely finished in 1913.

In 2013 INES Engineers carried out an assessment to value the structural behavior and the general conditions of the bridge. Through this study the causes and the damage processes were stablished as well as the corrective required actions.

Other types of studies were also achieved as: historical research, materials characterization, structural assessment,etc.

REPAIR ACTIONS

The main actions carried out on the pavements were the following: repairing the current railing; and the adaption of sidewalks, giving them cross slope to avoid the accumulation of water and aggressive agents.

The joints between the deck and the piers, which supposed, because of the water flow, a deterioration source for the deck and the masonry walls, have been removed allowing the continuity of the deck. Moreover, the abutments masonry walls were cleaned and consolidated.

In order to repair in detail the elements of the steel structure, the following works were carried out:

Firstly, the steel structure was cleaned, removing the different existing paint layers, through a hydrojetting technique, watterjetting at very high pressure.

Later, the elements, which have lost more than 10% of section or which were very deformed, were dismantled and removed.

Finally, the protection components were restored to a C4 level.

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