Scope
Tubing is used for the construction of large-diameter sewers, culverts under highways and railways and tunnels for public use by the method of panel passage. Tubing is also used to build mine shafts.
In the construction of collectors, the tubing acts as an outer shell, the inner shell is a thin-walled pipe.
Reinforced concrete tubing is a separate segment of the tunnel ring. Each ring consists of 6 tubing. The tubing is made of heavy concrete class B30.