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Ongoing construction work: ventilation shaft by KTH Campus

In spring 2024, work will be conducted to establish a ventilation shaft near IVL, Swedish Environmental Research Institute. The construction site needed for the ventilation shaft, is to be established with start 29 April 2024. Some disturbances may occur. 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. Underground, blasting of a connecting tunnel between the main tunnel and the future ventilation shaft is taking place. Noise from blasting down in the tunnel gives a muffled crackling sound.

Noise from blasting, working hours, and blasting warning

  • Ground level blasting is carried out to level the surface for the work on the ventilation shaft. The work is expected to be finished week 26. 
  • The blasting takes place at fixed times. Possible time for blasting is on weekdays from Monday to Friday usually at 10:00 and 14:00, but also at 16:00 and 21:00. Blasting also takes place throughout the day on weekends, Saturday to Sunday at 10:00, 14:00 and 16:00.
  • A louder alarm signal than earlier in the spring of 2024 is now sounding during blasting. Receive a blasting warning 30 minutes before blasting takes place by phone, SMS or email, register at: ncvib.com/spranginformation
  • When the blasting is completed, drilling for sheet piles and excavation will be initiated.
  • The works for the above and below ventilation shaft are planned to take around two years.