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The work of constructing a new neighborhood in Copenhagen began in 2017. The construction is conducted on a site that used to be the home of the old Central Post Terminal. It is located in central Copenhagen, close to Copenhagen Central Station.

In order to honor history, the new neighborhood has been named ‘Postbyen’ (‘Post City’). When the construction is finalized, the vision is to create a new neighborhood consisting of five towers with room for apartments, office space and hotels.

Challenge

It is a massive construction project and it is located very close (8 meters to be exact) to one of the tracks leading to the Copenhagen Central Station. The project includes a demolition of the old Post Terminal, an excavation of a large area and the construction of an entire new neighborhood.

The excavation depth is 8 meters and is surrounded by sheet piles, used to provide temporary and permanent walls during the construction. Any excavation set high demands for the surrounding environment. Pile driving, hammering with mechanical means and other sources of vibration are used to break through the different layers of soil and limestone. The vibrations caused by the excavation may create substantial volume loss problems for the railway close by.

Aarsleff is the main contractor and is responsible for the construction. As the construction site is close to railway, Aarsleff decided to hire one of their subsidiaries, Aarsleff Rail. They have been appointed to conduct maintenance and monitor the railway closely. One of their primary responsibilities is to ensure that none of the construction work has any negative impact on the overall safety of the railway.

Solution

Aarsleff Rail needed to find a solution that could help them monitor the railway closely. In the beginning of the construction project, they chose to install a total station. As the project progressed, they found that although the total station worked fine in the beginning, they needed to find another solution. The prisms were not sufficiently robust and were knocked off the railway. Every time the prisms were knocked off, they needed to be reinstalled – manually. Manual inspections are both expensive, time consuming and a safety risk. Aarsleff Rail sought after a solution that was not only more robust and affordable. They also needed a solution that could help them minimize the need for manual inspections.

Railmonitor has previously supported Aarsleff Rail in monitoring the condition of railways close to construction sites. Based on their previous experience with our services, Aarsleff Rail chose to install our solution to track bed monitoring.

To support the monitoring of the railway, robust tilt sensors have been installed on the track bed. They are monitoring the condition of a track section of 200 meters. The sensors monitor the tracks in real time and sends the data directly into the Railmonitor software. In this platform, Aarsleff Rail has easy access to the gathered data.

The intuitive platform includes various functions that enable them to plan their maintenance strategy according to the sensor data. If the system detects changes that exceed allowable thresholds, warnings are immediately sent out to all relevant stakeholders. When needed, Aarsleff Rail can easily devise condition reports in PDF format. This can give relevant collaborators and authorities a current status of the track condition.

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