Tunneling or tunnelling may refer to Digging tunnels

Tunnelling is an innovative technology is used all over the world that literally provided the breakthrough in construction of tunnels for metro, railway, roads or sewage systems using this Trenchless technology.

Project requirements and the geological and hydrological conditions determine the optimum Tunneling Boring Machine (TBM) types such as open face, EPB, and slurry TBM's.

These machines can bore through everything from hard rock to soft subsoil at diameters up to 20m to date.