Infrastructure · 2024 · Lagos, Nigeria
Coastal Approach Bridge
A 420-metre steel-composite approach bridge carrying four lanes across tidal wetland, delivered while maintaining marine access throughout construction.
Engineering Challenges
- C1Soft alluvial strata requiring deep piling below tidal level
- C2Restricted marine window for launching primary girders
- C3Corrosion exposure from a permanent saline environment
Solutions
- S1Driven steel tubular piles socketed into competent bedrock
- S2Incremental launching from a single land-side assembly yard
- S3Duplex coating system with 25-year first-maintenance interval
Gallery
On site.
Results
Measured outcomes.
420 m
Total span delivered
0
Lost-time incidents
6 weeks
Ahead of programme
