Bridge bearings are critical components positioned between the substructure and superstructure of a bridge to facilitate the safe transfer of loads—including dead loads, live traffic loads, wind, and seismic forces. They also accommodate controlled movements, such as rotation and horizontal translation, which help mitigate structural stresses caused by thermal expansion, traffic vibration, and ground movement.

Bearings generally fall into two categories:

⦁ Expansion bearings, which allow for both translational and rotational movement

⦁ Fixed bearings, which allow rotational movement with limited or no translation

Over time, bridge bearings can deteriorate or seize due to wear, corrosion, or fatigue, compromising structural performance and safety.

CRL provides specialist services in the replacement of bridge bearings, including temporary jacking operations and installation of new bearing systems. The process typically involves:

⦁ Lifting the superstructure using hydraulic jacks to relieve load from the existing bearing

⦁ Removal of the deteriorated bearing pad

⦁ Installation of new bearings, secured in place with high-strength, rapid-setting grout or via on-site welding as specified

⦁ Controlled de-jacking of the bridge once installation is complete

All works are undertaken in accordance with project-specific engineering designs and are carefully sequenced to minimise disruption and maintain structural integrity throughout the process.

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