On the evening of April 21, trains officially passed through the Bai Gio railway tunnel - where a landslide occurred 9 days ago, paralyzing the North-South railway line.
Previously, on April 12 and 13, a landslide occurred at this railway tunnel with a total volume of more than 200m3, blocking the tunnel.
Immediately after that, the construction units drilled 39 drills, including 2 drills from the mountainside down and 37 drills inside the tunnel to pump high-pressure concrete, creating stable adhesion for Bai Gio tunnel.
Large steel bars were transported inside by workers to serve the reinforcement of the tunnel.
Workers weld large steel bars to create a sturdy dome at the landslide site in Bai Gio tunnel.
Workers used hoes and crowbars to scrape away the dirt and rocks around the tracks before the line opened.
Workers used their hands to place wooden blocks on the railway rails, ensuring balance between the two rails and clearing equipment before tunnel opening time.
At exactly 5:45 p.m. on April 21, the railway industry tested the construction train through Bai Gio tunnel to assess safety.
On the afternoon of April 21, through a drill bit on top of the tunnel, the group of workers continued to mix and pour concrete into the landslide site.
Technicians use mini cameras to perform "ultrasound" inside the landslide site, thereby assessing the level of concrete filling at the landslide site.
By road, it is expected that tomorrow (April 22) all types of vehicles will be allowed to pass through Deo Ca.
Bai Gio Tunnel (in Dai Lanh commune, Van Ninh district, Khanh Hoa province) is about 900m long, built by the French more than 90 years ago, and completed and put into use in 1936.
According to the railway industry, after 1988, the layers of soil and rock on the tunnel's old shell were weathered and fell freely below the rails, paralyzing the North-South railway line.
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