Bolivia Hill Bridge Upgrade – Specialist Concrete Support
Specialist concrete support from tender to completion on the award-winning 320 m balanced cantilever Bolivia Hill Bridge, NSW.
Project: Bolivia Hill Bridge Upgrade, New England Highway NSW
Client: Georgiou / SRG
Structure: 320 m balanced cantilever bridge
Services: Tender support, B80 training, mix design, batch plant establishment, durability and hot/cold weather plans, thermal modelling, audits, on-site support
Outcome: Construction cost savings of over $2,000,000v
Overview
The Bolivia Hill Bridge was built as a 320 m balanced cantilever bridge on the New England Highway between Tenterfield and Glen Innes, NSW. The project was delivered to improve road safety, freight efficiency and reliability of travel in the area.
CQT Services was engaged by Georgiou/SRG to provide specialist concrete support across the project, from tender through to completion.
Our role
Tender and training: Tender preparation and B80 Bridgeworks training for the project team.
Mix design and supply: Specialist concrete mix design advice with Hanson, and establishment of the concrete batch plant on site.
Durability and weather planning: A dedicated concrete durability plan, plus hot weather and cold weather concreting plans.
Thermal modelling: Modelling to control the heat of hydration in large concrete elements within the bridge.
Construction cycle optimisation: Mix adjustments that met tight hydration temperature limits while still reaching the required post-tensioning strengths the next day.
Quality assurance: Independent audits of the quarry and concrete plant production.
On-site support: Constructability advice, a pump placement plan and troubleshooting throughout the project.
The result
Meeting both the temperature limits and the next-day strength requirements saved a full day on the construction of each segment. Combined with CQT’s design input, this helped reduce construction costs by over $2,000,000.
From the Project Manager
“CQT was brought onto the Bolivia Hill bridge project to help with the tender, run B80 bridgeworks training, design complying concrete mixes, with Hanson, and establish the concrete batch plant onsite. As the project developed CQT prepared our comprehensive Concrete Durability, Hot weather Concrete and Cold Weather Concreting plans which were very well received by TfNSW. The thermal models and mix adjustments allowed us to meet the tight hydration temperature specs while also achieving the required PT strengths the next day. This saved a whole day in the construction of each segment and was a huge time and cost saving to the project. The constructability advice, pump placement plan and independent audits of the quarry and concrete plants on behalf of the JV helped us maintain concrete quality and CQT were actively involved in resolving site issues throughout the whole project. CQT became a valued member of our site team and we will be actively using their services in upcoming projects.”
Gareth Davie, Project Manager – Bolivia Hill Upgrade
Planning a major bridge or mass concrete pour? Get in touch to find out how CQT can help.
