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Ongoing construction work: ventilation shaft by KTH Campus

In spring 2024, work was initiated to establish a ventilation shaft near IVL, Swedish Environmental Research Institute. The work above and below ground, is planned to take around two years. Some disturbances may occur in connection with this work. Updates on the project are published on this page.

A bus in front of a big building.
Svenska kraftnät's mobile information exhibition.

What is the project about?

The project is owned and operated by Svenska kraftnät and is part of a major infrastructure investment to strengthen the electricity grid in the Stockholm region.

The ventilation shaft is needed for the operation, maintenance and ventilation of the high-voltage cables that will eventually be laid in the tunnel that is being built between Danderyd and Hammarby Sjöstad.

  • The tunnel drilling that led to the work on the ventilation shaft passed KTH Campus before the turn of the year 2023/2024.
  • The establishment of the ventilation shaft between IVL Swedish Environmental Research Institute  and Sophiahemmet started 29 April 2024.

Blasting and other work

Underground, blasting of a connecting tunnel between the main tunnel and the future ventilation shaft is taking place. The blasting takes place with around 100 metres distance from the closest buildning. Noise from blasting down in the tunnel gives a muffled crackling sound during aroubd five seconds.

  • Receive a blasting warning 30 minutes before blasting takes place by phone, SMS or email, register at: ncvib.com/spranginformation
  • Blasting has been carried out below the surface, and an evaluation is underway to determine the potential need for additional blasting.
  • Raise boring will cause some structure-born noice during the drilling period.

Working hours

  • Working hours by the ventilation shaft and above ground is normally weekdays between 07:00-19:00.