What's happening in 2018-2020?
Right now, one of Sweden's most ambitious renovation and modernisation projects within rail traffic is taking place. This is how the country's busiest railway section − the Wasp Waist − is being prepared for the future.
For eight weeks this summer, the rail tracks between Stockholm Central and Stockholm Södra will be closed. The track was also be closed during the summer of 2018 and will be closed during the summer of 2020. Some complementary work may be carried out between the closures. This renovation of the Wasp Waist's double track is a huge investment by the Swedish Transport Administration. So what, exactly, will they be doing?
The areas affected by the Wasp Waist renovation are Tegelbacken, Norrström bridge, Riddarholmen, Söderström bridge, the tunnel under Södermalm and the area around Stockholm Södra. Preparation work has been completed at Älvsjö freight train yard, Karlberg and Fatbursparken.
- New tracks and new equipment
All tracks, overhead lines, contact lines, switch-tenders and signal systems will be replaced or modernised along the entire Wasp Waist section.
- Tunnels will be renovated
The tunnels under Södermalm and Riddarholmen will undergo much needed renovation and rejuvenation. In Södertunnel, for example, water and road salt leakages as well as damage to concrete and reinforcements will be rectified.
Focus is on renovating and adding a new proofing layer to Riddarholmstunnel. The barriers will be renovated, new support walls will be constructed and noise-protection panels will be erected.
The bridges across Tegelbacken, Norrström, Söderström and Söder Mälarstrand play a vital role in the Wasp Waist renovation project. The pillars and foundations are in excellent condition and, with a few minor repairs, are expected to last for a very long time. The steel structures on the bridges, however, are in bad condition. In 2007, the Swedish Transport Administration stated these structures should be replaced within ten years. As part of the renovation process, these structures will be lifted off via the water, where the pedestrian and cycle decks are. The new structures will then be lifted into place, again via the water.