Staff leaving Northshore Hamilton Wharves demolition site on a boat

Northshore Hamilton Wharves Demolition Stages 1 and 2

Location
Hamilton, QLD
Client
Department of Infrastructure, Local Government and Planning/Economic Development Queensland
Duration
8 months
Status
Completed 2016

Overview

Queensland’s Department of Infrastructure, Local Government and Planning/Economic Development commissioned Liberty Industrial to remove wharf structures including 18,000m2 of concrete deck and substructure with timber bearers, joist and concrete headstocks, edge beams, as well as over 1,900 piles. Stage 1 and 2 needed to be delivered concurrently to meet a tight schedule.

Challenges

  • A detailed structural assessment uncovered the wharf to be in a state of disrepair posing a serious risk of collapse as works progressed. The piles varied from timber to concrete sleeves to hollow and concrete-filled steel piles some of which exceeded a metre in diameter.
  • During site works, our team discovered two 1,100mm diameter steel piles previously not identified at the tender stage, which were larger in circumference than our underwater diamond wire saw.
  • When dive works commenced, the crew also identified large numbers of broken piles and other debris scattered along the river bed. None of these materials were identified during the pre-demolition hydrographic survey.
  • Stringent environmental controls had to be implemented to limit any discharges into the river or disrupt commercial or recreational operations on the river.
  • All suitable timber had to be recycled for reuse as high quality structural and architectural hardwoods, with select pieces to be used in future landscaping and structural architectural features across the development site.

Robust Solutions/Exceptional Outcomes

Robust solutions

  • Development of innovative demolition methodologies alongside meticulous planning and consultation with relevant government authorities and demolition specialists.
  • Deployment of three full-time dive crews to implement a range of underwater cutting techniques.
  • Engagement of a specialised timber recycler to be onsite, for the duration of the project, to assess all timber material.
  • Provision of state-of-the-art tools and equipment, including underwater dredging.

Exceptional outcomes

  • The project was executed as planned, on budget, on schedule and without incident.
  • 95% of materials were recycled.
  • 100% of steel beams and reinforcing steel were recycled.
  • 100% of the 11,500t of concrete wharf deck and header beams were recycled.
  • More than 95% of timber was recycled.

Value Add

01

Demolition Simulation and Modelling

With exclusive license to demonstrate using Extreme Loading® for Structures (ELS) software developed by Applied Sciences International (ASI).

02

Deconstruction

Use of best approach demolition and dismantling such as explosive using world class fleet, safety and engineering methodologies in explosives and rigging.

03

Decontamination and Industrial Cleaning

Designing engineered solutions for decontamination such as removal of asbestos, heavy metals, PCBs, dioxins, PFAS and NORMs.

04

Ground and Waste Water Treatment

Treatment of a wide range of contaminants and complex water treatment and soil vapour extraction.

05

Asset and Resource Recovery

Comprehensive waste and recycling management to contribute to the circular economy to extend the lifecycle of materials.

06

Site Remediation

Site rehabilitation via methods such as bioremediation, containment, decontamination, dewatering, stabilisation, treatment and tracking to disposal of contaminants.

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Awards

  • 2016 World Demolition Awards, Civil Demolition Award - Finalist

Managing PFAS in Site Closure Remediation

Insights

Bioremediation for Closure

Insights

Demolition and recycling phase completed for first major closure project for Rio Tinto at Argyle Diamond Mine, WA.

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