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Grafton Bridge, Grafton

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Grafton Bridge

This project is an NSW Government $240 million funded projects which involves building an additional 525 metre bridge 70 meters downstream from the existing road and rail bridge.  By designing the pier segments in two pieces and not casting the diaphragm with a precast shell the excess weight was saved within the project. Each half was erected by a crane and adjusted for a position using hydraulic jacks. To create the required monolithic connection between the deck and the pier a second stage pour was completed with access from the river. Vertical and horizontal post-tensioning was then installed.

CaSE was involved from 2018 to 2019 in supporting Fulton Hogan, at first completing temporary works designs and engineering support and then in the secondment of experienced bridge personnel to erect the bridge. CaSE Engineers oversaw segment erection, post-tensioning, logistics, optimization of precasting methods, pier segment diaphragm construction. All are per the TfNSW spec. CaSE was involved in the checking of the rail bridge during transportation, temporary propping design, and concrete deck falsework.

CaSE Scope & Specialist Inputs:

  • Segment Lifting designs
  • Segment transportation
  • Design of access systems
  • Design of Formwork for diaphragm Insitu pour
  • Independent check of temporary works
  • Endspan Falsework design
  • Advice on Geometry Control
  • Methodology Review
  • Engineering Advice
  • Provision of Engineers



Fulton Hogan

Project status