Method for constructing a tunnel

Method for controlling the direction of a shield tunneling machi

Method for lining tunnel wall formed by shield excavation

Method for removal of broken ground

Method for the construction of long tunnel with a lining

Method for widening road, superhighway or railway tunnels,...

Method of and apparatus for building thin lining on tunnel

Method of and apparatus for concrete tunnel lining

Method of and apparatus for concrete tunnel lining

Method of and apparatus for horizontally and vertically guiding

Method of and apparatus for the lining of a tunnel with concrete

Method of building underground cavern and tunneling machine

Method of forming underground ducts, conduits and the like

Method of making a huge elongated space of square or rectangular

Method of making covering wall of tunnel made by shield type exc

Method of producing a subterranean structure

Method of, and apparatus for, driving and lining tunnels

Method, system and device for building a wall in the ground

Methods of and apparatus for driving tunnels

Microtunneling systems and methods of use