Railway above ground
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The connecting track wetswards to the Öresund line and the Öresund bridge. |
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Connecting track eastwards |
Citytunneln is more than a tunnel under Malmö and new stations. The project also includes building the tracks that link the rail traffic both eastwards and southwards towards Ystad and Trelleborg as well as westwards to Copenhagen. New connecting tracks will be built at Bunkeflo, Vintrie and Lockarp.
Westwards to the Öresund Line
The tunnels’ southern exit will be just south of Annetorpsvägen. From here the railway goes southwards in a cut, an open shaft below the surrounding land. After Hyllie station the two outer tracks are elevated and cross at different levels across the extension of Lorensborgsgatan.
The tracks then continue as double tracks westwards to the Öresund line. At the same level as Elinelund and Mossängen’s summer resort the tracks go downwards in he cut below ground level and continue westwards below Yttre Ringvägen’s northern route and the Öresund line’s northern track.
The Citytunnel line connects to the Öresund line in the west between the existing Öresund tracks. South of Kalkbrottet there is the track portal that is necessary for the connection to the Öresund line. Retaining walls and a 250 metre long tunnel have already been built in connection with the construction of the Öresund connection.
Eastwards to the Öresund line
A connecting track is built at Vintrie eastwards to the Öresund line. This is a single track but is prepared for expansion to a twin track. The connecting track goes grade-separated below one of the two tracks westwards to the Öresund line and then turns eastwards.
The track then goes grade-separated below the northern section of the motorway in a tunnel that is approximately 110 metres long. The tunnel will be built in connection with the construction of the Öresund connection.
Hydraulic uplift
In those sections where the railway passes through deep cuttings, there is a risk for hydraulic uplift. When the weight of the earth is less than the water pressure in the upper part of the limestone - where it changes to soil - a champagne cork effect occurs.
To avoid this, the water table is lowered in the limestone in these sections by pumping up water from extraction wells near the track. The water is pumped back into wells further away, thereby limiting the impact on ground water.