GINNINDERRA DRIVE BRIDGES STRENGTHENING

Works involved strengthening of bridges 1029 and 1032, both of which are twin-span, post tensioned voided slab structures, carrying a multi-lane road over Ginninderra Creek. The strengthening process used stress bar post tensioning and carbon fibre reinforcing strips. Associated works included crack sealing, construction of extensions to the bridge piers and replacement of bearings, of both elastomeric and fixed disktron types. Scope also involved fabrication and supply of 29mm bars for installation and tensioning at the soffits, and 32mm bars at the deck-top. Unseasonal, frequent, heavy rain and high water flows in the normally almost-dry Ginninderra Creek presented an additional challenge for the FRP concrete work to extend the central bridge piers. Temporary dams were created and shored up around the piers and high-volume dewatering pumps used to enable construction to continue

Business unit:

Remediation

Client:

ACT Procurement Solutions

Current status:

Complete

Start date:

May 2011

Completion period:

December 2011

Contract type:

AS2124 – 1992 as amended

Value:

$1,729,667 + GST