Tunnels and underground works

Running underground projects places high demands on structure, logistics, and management. We do everything from railway tunnels and subways to parking garages and depots underground, sometimes together with external strategic partners. With experience from previous complex projects, there are clear working methods that reduce risks, create stable production with better control over both time and cost.

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Two construction workers in orange safety gear sit near the entrance to a concrete tunnel.

Experts in tunnels and rock caverns

We are accustomed to working in dense urban environments, in close proximity to complex infrastructure and sensitive buildings. The work is combined with broad technical expertise in areas such as concrete, installations, and vibration management. With extensive experience in rock work and experts in Swedish rock, fracture zones, and water-bearing layers. In this way, the right method, the right level of injection, and the right technical solutions can be chosen from the start. This deep understanding creates conditions for a safe, efficient, and predictable execution.

Construction workers at a large underground site with scaffolding and a skylight above.

Safer process with specialized expertise

Technical expertise is combined with access to experienced specialists and geologists, both through internal networks and via external forums and research collaborations. If needed, resources and specialist knowledge can be quickly added, creating stability in all stages of the project. For the client, this means fewer surprises and a more secure implementation process in extensive rock projects.

A well-lit concrete tunnel with pipes along the curved walls, stretching into the distance.

Expertise and knowledge shape the projects

Global knowledge exchange

Together with our colleagues in Norway, Finland, and Slovakia, we learn from each other and develop in the projects.

Resources for large projects

Large and challenging tunnel projects require foresight and continuous resource planning. Skanska has the ability to manage large projects without losing momentum or focus.

Swedish Rock Engineering Association

As a member of the Swedish Rock Engineering Association, BEFO, we meet and address common challenges and share solutions.

Effective tunnel boring machines

We have expertise in tunnel boring machines that bore the entire tunnel surface straight through the mountain. In this way, vibrations and crack formation can be avoided.

2

Millions of cubic meters of blasted tunnel rock are generated by the tunnels and underground projects that we annually operate.

100

years of experience in tunnel driving we have accumulated

1200

Meter tunnel was driven forward during 2025 in the project Forsmark FSR expansion

1946

Was Skanska involved in starting the Hardmetal Committee which later became the Swedish Rock Technology Association

A long-term partner

The working method is characterized by collaboration, transparency, and orderliness. With over one hundred years of experience working underground, security in delivery is created with solutions that endure over time, always with full knowledge of Swedish requirements for work environment, environment, and regulations. We are a complete and long-term partner in complex underground projects.