As the design life of a bearing is lower than that of the overall structure, the replacement of bearings should be considered as a regular maintenance operation for bridges. However, this intervention is not without its challenges: not all bridges are designed for easy maintenance, and they often have not been detailed to allow replacement.

The success of the whole operation depends on a smart combination of methods, access and equipment.

What are the key engineering challenges of such an intervention? What are the technical solutions and most advanced jacking systems currently available?

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