On Blasieholmen, a work tunnel still remains from when the Kungsträdgården underground station was constructed in the late 1970's. The tunnel is currently full of rubble, but because the tunnel will be used again when the Blue Line is extended south, this needs to be removed.
“We’re taking the opportunity to run a test over several days to see whether it’s effective to remove rock from here by boat”, explains project manager Andreas Burghauser.
Region Stockholm and the City of Stockholm are carrying out the test together to evaluate the environmental impact of boat transport compared to transport by truck.
“We’ll be measuring noise, but also calculating the climate impact”, says Andreas Burghauser.
Many factors involved
During the construction period, the work tunnel on Blasieholmen will be used for two to three years to remove blasted rock from the underground construction site.
“We’ll take into account the results of the tests when we decide how to transport the rock away from the site. But there are a lot of other things that also play a role. It must be financially reasonable and it must be possible to satisfactorily resolve reception of the rock”, says Andreas Burghauser.
How the test will be carried out:
The rock and soil in the work tunnel will be transported with a wheel loader to a boat moored at the museum quay. The entire test area will be fenced in, and the quay will be restored to its original condition when the test is completed. The work will take place from 14 to 31 October. It will take about a week to open the old work tunnel and set up the work area. Then the actual test will run for three or four days.