By Mélina Le Corré
Published on 29 November 23 at 7:26 p.m.
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Between the Garonne, the Lateral Canal and near the Ernest-Wallon stadium, home of the Stade Toulousain, the subway station Sept-Deniers is making great strides in the construction of the future 3rd line. Currently, civil engineering works are continuing on almost three hectares of influence. In the wings.
On old sports fields
Behind the white sheets, 120 employees, eight cranes, a concrete plant, construction equipment in every direction and huge silos. Here, old rugby and football fields have now disappeared. This is the largest work area. “This is an important project. This particular station will accommodate three metro tracks,” explains Jean-Jacques Laporte, site director of line C at Tisséo Ingénierie.
Three tracks, including one which will be connected to the railway depot. “On line C, unlike the other lines, a tunnel will allow the passage of two tracks,” adds Jean-Jacques Laporte.
“A covered trench 250 meters long will allow these metro tracks to be installed in parallel with switches allowing passage from one track to another,” adds Tisséo.
40% of walls completed
14,000 m³ of concrete will be needed to build the station walls. 40% of the walls are already finished. These walls are dug using a particular technique: mud injection. This is stored in large silos visible from the road. After digging, metal structures will consolidate everything.
The station walls will be 1.20 m wide and 30 m deep. 110 panels will be produced. The quay will be 25 m deep. On the site, a large swimming pool water retention of 900 m³ was also installed.
A solution to allow pollution of construction sites not be discharged directly into the sewers, “a practice that is done on all current construction sites,” explains Mathieu Roboam, director of civil engineering works for the Eiffage-NGE group.
A real hub of exchange
In this station, this real hub of exchange will include a bus station, a relay car park with 100 spaces, a carpooling space with 20 spaces and a bike station. The structural work will take place until 2026 before making way for other developments.
The first tunnel boring machines which will pass under the Stade Toulousain will arrive at first half of 2025. Built in a flood zone, the entrance to the metro station will be raised one meter above Chemin des Sept-Deniers. “An exceptional project in terms of the scale of the work, the means here are doubled, or even tripled, while the timing is the same as for the other works,” concludes Mathieu Roboam.
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