Client requirement
Cracked arch stones, leakage and changing load requirements required coordinated heritage repair and bridge strengthening.
Engineering challenge
With original design and construction records unavailable, investigation, testing and analysis informed the scheme and control of forces and deformation at the bridge and arch springings.
Technical approach
Sleeve-valve grouting treated the foundation in stages and layers. Temporary steel supports and dynamic monitoring preceded zoned treatment of surfacing and fill, reinforced-concrete arch encasement and backfilling.
Conservation work and project value
Crack filling, repointing and cleaning were coordinated with foundation treatment and structural strengthening to suit the condition of the historic fabric.
