Working in partnership with Transport for New South Wales (TfNSW), Beca have strengthened and rehabilitated Dubbo’s LH Ford Bridge - a vital road link in this bustling region of Western NSW, without disrupting locals or resorting to a new build.Constructed in 1969 and spanning 800 metres across the Macquarie River, the LH Ford Bridge connects east and west Dubbo – one of the fastest growing regional cities in New South Wales.
Given Dubbo’s fast-growing population and the heavy use of LH Ford Bridge as a vital link between the state’s vast west and metropolitan Sydney, Transport for New South Wales (TfNSW) commissioned Beca to carry out a detailed study to assess its structural integrity.
Our analysis found strengthening works were required on the three-span, cantilever box girder structure – to ensure the bridge was fit for decades of future use.
Harnessing our knowledge of Structural Engineering for Transport & Infrastructure projects, we developed a detailed design to guide the upgrade of the bridge, which included:
- Adding two new piers under the existing drop in the span half joints.
- Strengthening the existing cross girder at the half joint.
- Strengthening the main drop in span and back spans, utilising external pre-stressing strands.
- Designing a specific bearing and jacking sequence for the bridge (from the new piers), to ensure specific load distribution is achieved between the drop in span and back spans.
- Adding new expansion joints and enhancements to the existing access hatches, to facilitate maintenance access within the box girders.
- Resurfacing to remove the existing sag of the drop in span.
Image Credit: Wikipedia, 2020
Bridge first built
Span cantilevered structure
What We've Done
Amy Street Rail Overbridge