The project is in two parts: construction of the new wastewater tunnel and expansion of the Henriksdal treatment plant and the Sickla plant.
Both building of the tunnel and expansion of the treatment plant will be heard and sometimes felt by people living nearby.
Structure-borne noise will be caused by the drilling that we will be carrying out in the rock. Although it will not be possible to hear the drilling at that distance, the noise from it will propagate in the rock and cause sound waves that spread to the surface. People may perceive structure-borne noise to vibrate and be monotonous and muffled. The structure-borne noise will decline gradually as the various tunnel fronts move forward by about 15-20 metres a week.
Blasting noise is caused by explosions in the rock. These noises are short-lived and can be heard on the surface as a muffled explosion from inside the rock. We will be blasting on a number of different fronts simultaneously, and the loudest noise will be heard above the tunnel fronts.
When drilling and blasting are complete, stone will need to be knocked out with hammers and then the rock spoil has to be loaded. People living nearby will not hear the loading of rock spoil, and this will take place at some point during our planned working hours of 7am to 10pm.
According to the guidelines (NFS 2004:15), disruption from structure-borne noise indoors must not exceed
We are now constructing a technology tunnel inside the mountain at Henriksdalsberget. There are many homes on the mountain, and they will be affected throughout the entire construction period. As the work is taking place on several different fronts, there will be a number of blasting operations on every weekday. We have permission to carry out disruptive work between 7am and 10pm on weekdays, according to Swedish Environmental Protection Agency guidelines.
Structure-borne noise will be louder when the tunnel front is directly beneath your home. The disruption will then decrease.
Find out more about how Henriksdal residents will be affected by the blasting operations.
The wastewater tunnel will be built in the rock far below the surface at a rate of about 20 metres a week. It is thought that disruption from vibration will peak at about 10 weeks while the tunnelling work is directly beneath a certain area. The tunnel work will then move on and you will no longer be affected by either noise or vibration.
Anyone living along the planned route of the tunnel will experience the following noise pattern:
You can contact us directly if you have any views on our work when we are blasting the tunnel or blasting in Henriksdal.
You can reach us on 08 522 128 80 or send an email to framtidensavloppsrening@svoa.se
