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Developed in cooperation between YIT and Posiva, the grouting method eliminated the major risks related to the schedule of the construction project. The cooperative construction model was highly praised.

Posiva has spent more than 40 years preparing for the permanent disposal of spent nuclear fuel.

1,900 new parking spaces and smooth public transport connections in many directions near workplaces and new homes. The Keilaniemi underground car park will serve many kinds of travellers in Espoo.

Did you know that, when a tunnel is excavated, the blasts are always supervised by a third party? Or that rock scalers working in the tunnels use machines to remove loose rocks from tunnel walls and ceilings to improve occupational safety? Or that the amount of rock that is detached from the rock in one blast is called a break?

An excavation project for a seasonal heat storage will begin soon in Kuusikonmäki, Vantaa. It is not unusual to carry out quarrying, underground excavations and related blasting work in residential areas in Finland. But how to prepare for excavation and how will it affect the local residents?

The construction industry pays more and more attention to the environment and sustainable development. At YIT, these matters are developed systematically. But how is the environment taken into consideration in the various stages of infrastructure construction?

Large machines, explosions and working underground captivated Visa Myllymäki, Vice President, Rock Tunneling, already during his studies.

Helsinki has been a pioneer of underground zoning, and its underground local master plan from 2011 was the first of its kind globally. However, in recent years, Helsinki has started very few underground projects — some operated by the private sector, some by the city.