Projects

Online Concrete Cutting Services joined the construction team as a preferred subcontractor in 2012 and will continue as a preferred subcontractor until completion.

We have been engaged to perform extensive concrete sawing and drilling works, including deep road sawing, perimeter exclusion zone (PEZ) drilling works, large scale wire sawing, track sawing, GPR scanning, service locating, as well as BROKK remote controlled demolition works.

Due to the high-profile nature of the site, the compliance standards are greater than ever encountered, forcing all parties to perform at their optimum level.

Among some of the many concrete sawing and drilling works performed at Barangaroo, Online Concrete Cutting Services played an integral part in the removal of some large sections of the foreshore boardwalk as part of the urbanisation and reshaping of this area. The removal of the boardwalk utilised almost all facets of our services from a combination of large-scale wall sawing and wire sawing to core drilling, bursting, splitting, as well as BROKK robotic demolition. With significant focus on the Barangaroo project not only locally but also on an international stage, strict environmental controls were adopted especially where works were completed alongside as well as above the pristine waters of Darling Harbour.

Online Concrete Cutting Services were also tasked with the job of removing large sections of the concrete caissons that form the main water seal between Sydney harbour and the land on which Barangaroo has been built. To facilitate removal, a coffer dam was built on the water side of the wall to stop water ingress. The cutting and removal of the concrete caisson wall sections was performed over the course of one weekend using two wire saws working simultaneously to create a 4 metre by 2 metre opening. The opening is now used as the main water intake for the cooling towers.

Online Concrete Cutting Services, as the preferred sawing and drilling subcontractor, was engaged on an ongoing basis from initial early works to post commissioning works.

All facets of concrete sawing and drilling were undertaken with multiple crews active onsite throughout the project. Concrete cutting works included large scale wire sawing of the tunnel opening, track sawing to depths in excess of 1000mm, countless number of road sawing metres, core holes, hand sawing and ring sawing.

Wire Sawing on NRT project - As part of the construction of the underground sections of the NRT project, the tunnels were lined with concrete rings as they were being formed by the Tunnel Boring machines. To align these concrete rings with the tunnel openings, the concrete ring sections extending beyond the tunnel opening needed to be removed. Large scale wire sawing was required due to the sheer size of these concrete rings, being 250mm thick and over 6 metre in diameter. Depending on access, the concrete rings were removed in sections, with some being removed in only 3 sections resulting in over 20 metres of continuous feed diamond wire running at a time.

Track sawing on NRT project - To facilitate the construction of the various stations, several large concrete slabs in excess of 1 metre thick were installed to support 500 tonne cranes. Nearing station completion these slabs needed to be removed using two of our Pentruder track saws operating simultaneously cutting through the 1000mm deep heavily reinforced concrete used for the crane slabs.