We widened a protected, 5-span masonry arch bridge by more than 3.0m while maintaining traffic and retaining the original stone elevation.
Summary
This bridge upgrade project involved the assessment, strengthening, widening, and refurbishment of nine bridges over a 12-week period.
Solution
The nine bridges comprised reinforced concrete structures, a multi-span encased steel beam structure and a protected five-span masonry arch bridge dating from the 16th century.
The scope of works included:
- Structural assessment
- Options study
- Preliminary design
- Planning
- Environmental impact reports
- Archaeological assessment
- Development of repair strategies
- Access arrangements
- Traffic management and diversion requirements
- Detailed design
- Contract documents to Public Works Contracts
- Contract administration
- Construction supervision
- Undertaking the role of PSDP
Challenge
We had just eight weeks to identify the correct solution for the various structural forms, all in different environments and with different structural, operational and durability issues.
Undertaking the detailed design of the bridges in parallel, and on a 12-week fast track programme, added further complexity.
Careful negotiation with numerous third parties, including planners, Inland Fisheries Ireland, the Office of Public Works, National Parks and Wildlife Services, landowners and local authorities was required to ensure successful delivery.
Services provided:
Bridge engineering design
