AF carried out the operation of demolishing the iconic interchange Bispelokket, with ramps and the Nylandsveien bridge.
About the project
The project was split into two phases to ensure the flow of traffic in the area surrounding Oslo Central Station and the opera house. In the first phase, some of the entry ramps and part of the Nylandsveien bridge were demolished. The Nylandsveien bridge was split into sections and lifted off the site using a mobile crane. Phase two was all about demolishing Bispelokket itself using a more traditional demolition method involving machines.
NOK 20 million
Parts of the work was conducted at night to allow traffic to flow undisturbed through Oslo Central Station.
Demolition work in Oslo Graben
The first phase involved demolishing 3/4 of Bispelokket and three out of four ramps. These works were carried out using excavators of 30 to 70 tonnes. During the entire period, there was traffic flowing close to the demolition edges and plenty of activity on site.
The Nylandsveien bridge comes onto Bispelokket from the north. The Nylandsveien bridge runs over the train tracks at Oslo Central Station, and that particular section had to be demolished gently using a mobile crane and concrete sawing. These works had to be coordinated with the Norwegian National Rail Administration on a daily basis, and the works were carried out at night to allow traffic to flow undisturbed through Oslo Central Station.
There was a window of two to five hours every night to perform lifts. There was significant planning/engineering in terms of the stability of the construction and HSE throughout the entire project.