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hero-Soft Ground Tunnelling

Soft Ground Tunnelling

WSP works in all forms of soft ground tunnelling, from cut and cover, tunnel boring machines, tunnel jacking, NATM, and soil stabilization strategies like ground freezing and ground improvement.

hero-Soft Ground Tunnelling

Soft Ground Tunnelling

WSP works in all forms of soft ground tunnelling, from cut and cover, tunnel boring machines, tunnel jacking, NATM, and soil stabilization strategies like ground freezing and ground improvement.

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Send a message / Soft Ground Tunnelling

Eric Peissel
Global Director, Transport and Infrastructure
Global
Request for proposal / Soft Ground Tunnelling

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  • Send a message / Soft Ground Tunnelling

    Eric Peissel
    Global Director, Transport and Infrastructure
    Global
    Request for proposal / Soft Ground Tunnelling

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    A tunnel built in soft ground – such as clay, silt, sand, gravel, or mud – requires specialized techniques compared to hard rock, to support the unstable nature of the soil. At WSP, we have extensive experience with soft ground tunnels on every continent and we pride ourselves on developing innovative strategies to deal with even the most complicated soil characteristics while preserving stability. There is a wide variety of techniques for soft ground tunnelling, and the best fit is ultimately determined by ground type, program, budget, and surrounding structures.

     

    Putting our soft ground tunnelling to work for you

    To select the most appropriate method for a particular tunnel, several factors need to be considered, including but not limited to ground conditions, length, depth, diameter, alignment geometry, and budget. Another important consideration is the risk and sensitivity of nearby infrastructure and buildings to ground movement.

    At WSP we know that an important aspect of soft ground tunnelling is the protection of existing structures and utilities, as many soft ground tunnels are located in sensitive urban environments where settlement caused by tunnelling is a major concern. Protective measures such as ground improvement, compensation grouting, and positive pre-support can be used to tunnelling in soft ground successfully.

     

    Shaft design and construction

    We recognize that shafts are critical to the construction and operation of tunnels structures. They enable access from the surface to the tunnel level, including passenger access to underground mass transit and rail tunnels. They act as drop shafts for wastewater tunnels and down take and uptake shafts for water supply tunnels, as well as inlet and outlet structures for flood control tunnels and dams. Shafts also provide ventilation for highways, mass transit, and rail tunnels.

     

    Get in touch with our Soft Ground Tunnelling experts

    Send a message / Soft Ground Tunnelling

    Eric Peissel
    Global Director, Transport and Infrastructure
    Global

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    Discover our soft ground tunnelling projects
      

    thn-wsp-portland-eastside-cso-tunnel
    Portland, Oregon, USA

    East Side and West Side CSO Tunnels

    The complex and highly successful combined sewer overflow (CSO) tunnel projects were key infrastructure components of the City of Portland, Oregon’s efforts to improve the water quality of the Willamette River.

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    Sydney, Australia

    Parramatta Light Rail

    Parramatta Light Rail is one of the NSW Government’s latest major infrastructure projects being delivered to serve a growing Sydney. Light rail will create new communities, connect great places and help both locals and visitors move around and explore what the region has to offer.

     

    032-HK-Sub-Sea-Tunnel-Thumbnail
    Hong Kong

    ​​Mitigating Geotechnical Risks for Deepest, Longest, and Largest Sub-Sea Road Tunnel Ever Built in Hong Kong

    Construction to alleviate traffic congestion and shorten journeys. This is the deepest, longest, and largest sub-sea road tunnel ever built in Hong Kong. 


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