Light River Bridge Replacement Design
Sterling integrated geotechnical, hydraulic and scour assessments into the IFC design of a 28-metre through-girder rail bridge on bored piles, verified for 300LA loading and a 60-hour track occupation.
Challenge
The 28-metre single-span replacement needed to carry 300LA rail loading and be installed within a 60-hour track occupation. The design had to reconcile geotechnical conditions, hydraulic and scour requirements, bored-pile foundations and rail access constraints in an IFC package ready for construction.
Solution
Sterling integrated the geotechnical, hydraulic and scour inputs into the structural analysis and detailed design of the through-girder bridge and its bored-pile foundations. The analysis verified strength, serviceability and fatigue performance under 300LA loading. Construction details and staging were developed around the 60-hour occupation so the permanent design aligned with the available rail access window.
Deliverables
IFC drawings and design calculations for the through-girder superstructure, substructure and bored-pile foundations. Structural analysis for 300LA loading, serviceability and fatigue. Integration of geotechnical, hydraulic and scour requirements. Construction staging and methodology inputs for the 60-hour rail occupation.
Outcome
The coordinated IFC package resolved the structural, geotechnical, hydraulic and scour interfaces before construction. It gave the principal contractor a buildable replacement design and a defined sequence for delivery within the planned rail occupation, with load capacity and long-term performance demonstrated through the design calculations.
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