Underground excavation and reinforcement

Regardless of the local topography, rail and road routes are made to be appropriate by using traffic tunnels. Traffic tunnels conserve the surrounding nature and safeguard the residents in the area from the negative impacts of traffic. The safety of bicycle and pedestrian path is ensured by using footbridges and underpasses.

Tunnels serve as landlines of infrastructure in populated areas. Traditionally they have been used to carry district heating, household water, electricity, and communications. Almost all the wastewater in the metropolitan area is transferred via and processed in a separate underground tunnel network.

The durability and the length of use of population shelters built into rock are unbeatable. Underground facilities have many uses.
In normal conditios, population shelters built into rock serve as car parks, as sports and leisure activity facilities, and as warehouses.

Because of the prevailing constant conditions and large volume in spaces built into rock, they are suitable for storing liquids and gases. Sand stored in silos and other bulk material remains unfrozen and the moisture content keeps stable regardless of weather conditions.

The use of spaces within rock to protect the equipment used by information technology, power stations, and industry guarantees the infrastructure of society.

The Defence Forces is one traditional user of underground facilities.

Bedrock is the best-known final location for the storage of power station waste.