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Microtunnelling

Tropicana Tunnel Strengthening Works

Port of Brisbane and Aaro partnered up for the next phase of this massive project, covering full CCTV assessment, design, relining and full reinstatement.

Aaro were engaged to construct a multiplate tunnel inside the existing escape tunnel due to the existing structure exceeding its maximum load capacity by 15% and was in danger of collapsing.

The additional multiplate tunnel was used to reinforce the current escape tunnel bringing it back to its load rating reinstating the escape tunnel for operation.
This was completed during operation of the conveyor and around live services allowing the site to maintain production and operation during construction.
Access was tight making it difficult to install the plates but with additional lifting aids and some innovative thinking the crew were able to install the multiplate safely around the live services.

The scope of works included:

  • Supply of labour, materials and specialised plant
  • Removal of concrete invert
  • Installation of tunnel plate / multiplate
  • Shotcrete sealing ends
  • Cementitious grout fill into cavity between tunnel plates
  • Concrete invert reinstatement

→ Download the Project Brief

$530k

Client

AngloGold Ashanti Australia

Location

Tropicana Gold Mine, WA

Project Duration

3 Months

Project Start

July 2023

Project Finish

September 2023

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