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    MEET THE #WSPCHANGEMAKERS

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      WSP's Q1 2025 Results

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hero-Tunnel Structural Engineering

Tunnel Structural Engineering

WSP is world-renowned for innovation in structural engineering for tunnels and underground structures using state-of-the-art numerical analysis.

hero-Tunnel Structural Engineering

Tunnel Structural Engineering

WSP is world-renowned for innovation in structural engineering for tunnels and underground structures using state-of-the-art numerical analysis.

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    Personal Information

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    Drawing on our international and local experience, WSP is skilled in carrying out inspections and condition assessments of all types of tunnels, and providing innovative rehabilitation solutions. This includes reconditioning of inner shells, drainage, safety-related retrofits and waterproofing remediation to extend the life of tunnels.

    We also design upgrades to meet fire protection and safety standards including state-of-the-art energy-efficient ventilation and lighting systems. And, we undertake operational evaluations and lifecycle costings to ensure tunnels achieve optimum efficiency, higher performance and greater returns on investment for our clients. 


    Get in touch with our tunnel structural engineering experts

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    Discover our tunnel structural engineering projects

     

    Slussen bussterminal blir effektiv och modern
    Stockholm, Sweden

    Slussen Bus Terminal: Replacing an Outdated Structure with a State of the Art Venue

    This centralized underground transport hub opens up development of social venues and green spaces.

    THUM Toyo (1)
    Antioquia, Colombia

    Toyo Tunnel

    WSP contributed its experience to the largest tunnel project in America part of the megaproject of 18 tunnels, 30 bridges and 17 kilometers of open-air roads in Colombia.

    thn-Hung-Hom-Station-1-Thumbnail-563-220px
    Hong Kong

    MTR Hung Hom Station

    We helped transformed the key interchange station in Hong Kong’s MTR network to accommodate its expansion plan and enhance the city’s connectivity.

    036-Sentosa-Gateway-Thumbnail
    Singapore

    Supporting Safe Construction of a Road Tunnel to Ease Traffic Congestion

    The 1.3 km Sentosa Gateway Tunnel is a two-lane, one-way road tunnel connecting outbound traffic from Sentosa Island directly to major roads to alleviate congestion.

    thn-wsp-st-louis-lower-meramec-tunnel-rendering
    Missouri, USA

    Lower Meramec Tunnel Project

    The 6.8-mile-long tunnel project — the largest ever for Metropolitan St. Louis Sewer District (MSD) — will improve water quality within the Meramec River watershed and help ensure regulatory compliance.

    THU-First_Street_Tunnel
    Washington, DC, USA

    First Street Tunnel

    During a storm event, the First Street Tunnel will store up to 30.3 million liters of combined sewer overflow in its 853 meters of tunnel and 4 shafts, preventing flooding in Bloomingdale and Le Droit Park.

    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.

    thn-Immersed Tunnels
    Norfolk to Portsmouth - Virginia - US

    Elizabeth River Tunnels

    The first deep-water concrete immersed-tube tunnel in North America will significantly reduce travel time while greatly improving safety.

    thn-Eurasia-tunnel_Transport-And-Infrastructure
    Istanbul, Turkey

    Eurasia Tunnel (Istanbul Strait Road Tube Crossing)

    First road tunnel construction across the Bosphorus linking Europe and Asia: innovation and international collaboration to solve technical challenges.


    Explore our insights on tunnel structural engineering

    Procurement-Paradigm-Thumb

    July 2025

    Procurement Paradigms: Reflections on collaborative approaches for tunnels and underground construction projects

    svg-icon Global
    svg-icon White Paper
    svg-icon Decarbonization , Mobility
    Thn-Web-Underground-Singapore

    December 2021

    Developing Underground Space: A View From Singapore

    svg-icon Feature
    svg-icon Places , Resilience
    thn-tunnel-portland-east-side-cso

    August 2021 | 6:30 minutes

    Tunnels: Sustainable Solutions for Major Water and Wastewater Infrastructure

    svg-icon United States
    svg-icon Feature
    svg-icon Resilience , Resources
    thn-Tunnel-Seismic-Resilience

    May 2023

    Advancing Tunnel Seismic Resilience

    svg-icon Global
    svg-icon Feature
    svg-icon Resilience , Technology

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    • Tunnel Seismic and Earthquake Engineering
    • Tunnel systems
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