Award-winning Demolition Experts
We’ve won a significant number of awards, both in Australia and internationally. Our awards recognise our innovative methodologies and solutions that solve high risk challenges and deliver best in class solutions.
Broun Avenue Bridge
Client: Tonkin Gap Alliance
Location: Embleton, WA
Duration: April 2022
Structure Overview
The Broun Avenue Bridge was a 60-metre, reinforced concrete deck over post tensioned concrete beams, with asphalt road surface.
Scope of Works
Mainline was engaged by the Tonkin Gap Alliance to demolish the Broun Avenue Bridge over Tonkin Highway. The demolition scope included complete demolition of the existing bridge structure, concrete abutments, centre columns and foundations during a 52-hour shutdown.
Equipment deployed
The demolition of the Broun Avenue Bridge required extensive resources to address contingency planning, ensure timely completion, and prioritise safety for the team, community, new bridge, and environment.
Plant & Equipment:
- 3 x Loaders
- 5 x 20T – 45T Excavators
- 1 x 90T Excavator
- 10 x Semi tippers
- 2 x Water trucks
- Concrete pulverisers
- Concrete crackers suite 95t to 20t
- Rock breakers suite 35t to 45t machines
- Steel shears
- Grapples
- Street sweeper
- 4 x High powered floor saws
Project Highlights
- Winner – 2022 World Demolition Award
- Bridge demolition completed and handed over to client within 44 hours
- Completed with zero HSE incidences
- Within the shutdown Mainline completed:
- The removal of all bridge debris.
- Removal of centre pier columns and foundations entirely.
- Demolition of abutments.
- Removal and recycle of 2000 tonnes of concrete.
- Removal of over 3000m3 of sand from abutments.
Operational Challenges and Solutions:
- Time constraints: Mainline addressed Tonkin Highway closure challenges with a thorough contingency plan, including a standby mechanical team to minimize downtime.
- Cost savings: Mainline’s methodology delivered significant cost savings and risk mitigation for the client compared to traditional cut-and-lift methods
- COVID-19 challenges: Additional personnel were inducted and placed on standby to address lockdown and availability issues.
- Proactive planning: Equipment and resources were oversourced in advance to prevent delays.
- Efficient use of equipment: Multi-purposing ensured maximum utilisation of time and resources.
- Noise restrictions: Despite limited rock breaker hours (7:00am-9:00pm), productivity was maintained through diverse equipment deployment within the 52-hour schedule.
Our innovative methodology successfully delivered the project safely, with Zero LTI, within budget and ahead of the agreed timeframe.