Tubing is used for the construction of tunnels, mine shafts, large-diameter sewer collectors, and culverts under highways and railways using the shielded passage method.
In the construction of collectors, the tubing acts as an outer casing, with a thin-walled pipe serving as the inner casing.
The reinforced concrete tube is a separate segment of the tunnel ring. Each ring consists of 6 tubes. Tubes are made of
heavy concrete of class C 25/30