Transport for NSW’s M6 Stage 1 project features twin 4km tunnels linking the M8 Motorway at Arncliffe to President Avenue at Kogarah. The works involve complex roadheader tunnelling through varying geology, the construction of a dive portal structure, and upgrades and tie-ins to existing road infrastructure.

– 4km twin road tunnels

– Excavation:

– Roadheaders in Hawkesbury Sandstone
– Excavators in sands and clay with jet-grouting treatment

– 125m open cut + 230m cut & cover excavation (with top-down construction method)

– 2 caverns: section up to 267m²

– 3-lane tunnels: section up to 182m²

– 27 cross passages

TfNSW Website    CPB Website    Ghella Website    UGL Website

Sydney Gateway is the “missing link” that connects Sydney’s motorway network to Sydney Airport. The project consists of over 5km of new road including 19 new bridge structures, a new elevated flyover to the Domestic Terminals, and over 3km of new shared cycle and pedestrian pathway.

The project was delivered successfully despite facing significant complexities and constraints in its interfaces with live traffic and airspace.

Australian Precast Solutions (APS), established in 2008, operates a purpose-built precast concrete facility in Macksville, NSW.

The company specialises in manufacturing a variety of prestressed and reinforced concrete products, including Super-T bridge beams, planks, girders, noise walls, barriers, arches, and custom-designed elements.

The Tunnel & Station Excavation (TSE) project is the second stage of the Sydney Metro network that connects stage 1 at Chatswood to the existing heavy rail at Sydenham.

The connection consists of twin 15.5km TBM tunnels that cross beneath Sydney Harbour and includes the complex excavation of underground caverns to facilitate new stations at Chatswood, Crows Nest, Victoria Cross, Barangaroo, Martin Place and Pitt Street (Gadigal) with an open cut station box excavation at Waterloo.

Sydney Metro Northwest is the first stage of Sydney Metro, which included 15 km of twin TBM tunnels connecting the new viaduct rail at Bella Vista and the existing Sydney Trains network at Epping.

The works also included hard rock tunnelling, excavation, and cavern construction of new stations at Bella Vista, Norwest Business Park, Hills Showground, Castle Hill, and Cherrybrook, along with two service shafts.

The WestConnex Rozelle Interchange consists of a 17 kilometre network of tunnels functioning as a new underground motorway interchange which provides connectivity to the M4-M5 Link Tunnels, the new M8 tunnels and the City West Link.

The interchange also provides an underground bypass of the congested Victoria Road between the Iron Cove Bridge and the Anzac Bridge, and a stub connection to the future Western Harbour Tunnel.