Thiess is delivering one of Australia’s most technically complex tunnels to create a vital underground pedestrian link in the heart of Sydney’s CBD.

Measuring approximately 180 metres, Wynyard Walk sets a national benchmark for cutting-edge tunnel design and construction in one
of the nation’s busiest urban precincts.

The walkway will allow pedestrians to get from Wynyard transport hub to the Barangaroo waterfront in approximately six minutes, avoiding steep inclines and road crossings.

Cutting Force were awarded the contract to complete core drilling for the canopy tube systems. This was successfully completed in two stages, with Cutting Force implementing two 12 hour shifts to complete the work within the scheduled program.

Stage one involved core drilling 43 holes in strategically located positions at 240mm diameter x 450mm deep with a tolerance of +/-5mm.

Stage two involved a custom designed and built drilling rig that
could house and drive the 600mm diameter x 2200mm core bit,
which was capable of drilling 5.5 meters through bored pile and
into the rock face. Cutting Force selected TYROLIT to supply their
quality TGD 600mm core bits and TYROLIT DGB 1000 drilling gear
box powered by WSE 1217 High Frequency that is capable to drive
up to 1000mm core bits to complete these works. The DGB 1000 has eight stages for optimal speed and was powered by TYROLIT High – Frequency Electric Motors, the same units that Cutting Force operates on their TYROLIT Wall Saws and Wire saws. Thiess’ engineering and Cutting Force, through planning and critical analysis of the work undertaken allowed this stage to be completed within four days, well under the scheduled six day work program.

Cutting Force is extremely proud to deliver a quality service and provide support to Thiess. Cutting Force looks forward to continuing involvement in the projects Thiess undertake Australia-wide.