get in touch

WestConnex – M4 East Tunnel Design, Sydney, Australia

THE PROJECT

A critical part of the NSW Government’s integrated transport solution, WestConnex is the largest transport and urban renewal project in Australia. The M4 East Tunnel is the first underground stage of Sydney’s $6.8 billion WestConnex Project. It extends the existing M4 Motorway with two new three-lane tunnels linking Homebush to Haberfield. Each of the 5.5 km long tunnels has spans ranging from 15 m to 30 m. A further 8.5 km of ramp and access tunnels provide access and egress along the route. A joint venture between CPB Contractors, Samsung CT and John Holland (CSJ) was awarded the $2.7 billion contract to design and construct the M4 East tunnel.

PSM was engaged by CSJ to provide design and construction phase services.

ENGINEERING AND TECHNICAL OPPORTUNITIES

This high-profile project raised a high level of public concern and involved multiple stakeholders. It also involved complex interaction between numerous underground structures.

When complete, the caverns will include Australia’s widest civil road tunnel, with spans up to 30 m wide accommodating five traffic lanes.

APPROACH AND INNOVATION

Following rigorous assessment and geotechnical and hydrogeological modelling, PSM’s tailored approach included:

  • Prediction of ground settlement
  • Provision of geotechnical advice including retaining wall and cut slope design
  • Assessment of soil and groundwater salinity and material reuse
  • Validation of ground conditions
  • Provision of primary and permanent ground support designs
  • Provision of geotechnical and hydrogeological monitoring
  • Participation in permit to excavate (PTE) and provision of various construction-related geotechnical advice.

OUTCOMES

PSM successfully provided major aspects of the project within exacting timeframes including primary and permanent support design for 7.8 km of tunnel including all six caverns.

Services: #infrastructure #M4 East #Tunnelling #WestConnex

get in touch

Contact Us

For expert advice, reach out to our team today.

    SUBSCRIBE TO STAY IN TOUCH

    Receive the latest news and updates straight to your inbox.
    footer certificationfooter certificationfooter certification
    Technically Assured Organisation
    Locations

    Sydney

    G3, 56 Delhi Road
    North Ryde NSW 2113

    BRISBANE

    Level 6, 500 Queen St
    Brisbane Qld 4000

    PERTH

    Level 3, 22 Delhi St
    West Perth WA 6005

    MELBOURNE

    Shop 4, Suite 4, 23-31 Gheringhap Street
    Geelong VIC 3220
    Contact us
    Locations

    Sydney

    G3, 56 Delhi Road
    North Ryde NSW 2113

    BRISBANE

    Level 6, 500 Queen St
    Brisbane Qld 4000

    PERTH

    Level 3, 22 Delhi St
    West Perth WA 6005

    Geelong

    Shop 4, Suite 4, 23-31 Gheringhap Street
    Geelong VIC 3220
    Contact us
    Footer Certification
    Footer AEC logo
    © Pells Sullivan Meynink