Södra Kajen, from an oil port into a residential area
In Stockholm's Södra Kajen, a previous oil port, the foundations are laid for a new residential area. In this project, we work on shore and at sea.
In the Värtan port of Stockholm, Sweden, a damp breeze blows in from the sea. However, the sea is still open and unfrozen, thanks to the mild weather. It helps our work at the Södra Kajen quay contract ordered by the City of Stockholm. Our job is to demolish the oil quay constructed in late 1800s and replace it with infrastructure for the designed residential area.
Site Manager Oskar Nilsson says that the earthworks require a special kind of competence. Once the oil port was still operating, plenty of oil leaked into the soil so it must be cleaned before we begin the construction work. The contract includes the remediation of the 300-metre-long and 40-metre-wide beach section.
"The finer soil is removed but stones over 150 millimetres can be taken to a crushing plant as they will not be contaminated," says Oskar.
After the earthworks and renovation work, we will fix up the old pier and install water piping and plumbing for the buildings. In addition, we'll create the stormwater drainage.
Piling and matching the platform are the next important stages. In addition to the sheet pile to be erected at the pier's edge, two pile rows running in the direction of the beach will be immersed in the ground for the duration of the pier demolition and repair work as a temporary support structure.
The new pier will have the appearance of one built in the 1800s as its outermost edge will be paved with the stones from the old pier.
"The original stones were stored and numbered so that each stone will find its place while we're finalising the outer edge," says Oskar.
Working in and under water
The sea poses its own challenges to the project. At times we work on a float and sometimes underwater. When the sea is rough, it makes the work more difficult, not to mention the underwater work. Also the marine traffic from the close-by terminals restricts the work as it's impossible to work in water once the ships are arriving and departing.
The work in Södra Kajen is progressing as planned, and cooperation with the City of Stockholm has been smooth.
The foreman from the city has been present every day and the issues are solved on the fly. The project is a showcase for us as we might also have an opportunity to work together with the city in the future.