Project Details
With a focus on avoiding any further compromise to the existing and structural integrity of the tunnels due to vibration, this led to the initial selection of the baby AQ1s (120kg) milling head mounted on an 8 tonne excavator to mill back the concrete tunnel linings and the raw blue greywacke walls.
The benefits of utilizing these small robust Antraquip Milling Heads is that there is little or no micro cracking of the area outside the excavation line (Cracking from hammers and other excavation methods has been shown to reach up to 2m) and this made them an ideal option for this particular remediation challenge
Two of the range’s smallest units – an AQ-1s and AQ-1 – were utilised on the project over a period of 2 years.
