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 240 mm diameter x 450 mm deep with a tolerance of +/-5mm.

Stage two involved a custom designed and built drilling rig that could house and drive the 600 mm diameter x 2200 mm 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 600 mm core bits and TYROLIT DGB 1000 two stage 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 operate their TYROLIT Wall Saws and Diamond Tipped Wire Saws.

This stage was completed within four days, well under the scheduled six day work program.

Thiess’ engineering, thorough planning and critical analysis of the work undertaken by Cutting Force enabled the project to run seamlessly and unhampered.

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.