- Replacement of 7 steel bridges with concrete culvert structures including 1 x 6-span bridge, 1 x 5-span bridge and 5 x 4-span bridges, with the largest weighing approx. 600T
- Construction of new bridges offline, approx. 10 meters adjacent to existing structures.
- Lift and slide operations:
- Remove existing bridges from rail alignment.
- Install new bridges within a 2-hour window during shutdown.
- Use of locking collar hydraulic jacks, rollers, and strand jacks for lifting and sliding.
- Design, fabrication, supply, and installation of temporary works for both bridge types.
- Temporary post-tensioning using Freyssibars.
- Execution aligned with client’s strict shutdown schedule (first bridge completed July 3, 2019; remaining replacements scheduled over 6 months).
