Calliope River Bridge Headstock Replacement

The Calliope River bridge experienced significant problems with lateral movement under heavy vehicle loads. The movement was the direct result of the raked supporting piles which imparted a horizontal thrust under eccentric traffic loading. To resolve the problem, two vertical 1500 millimetre diameter bored piles and a new headstock were augmented into the existing bridge pier.

Bonacci Infrastructure provided the temporary works design and methodology for the construction of the 2.7 metre deep x 15 metre long concrete headstock which was completed in a single pour. The formwork spanned between the two bored piles which ultimately formed part of the permanent works.