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

Movable form front for a tunnel-lining form

Movable sealing assembly for tunneling machines

Moving steel form system

Plant for digging and shoring up the walls of tunnels during exc

Process and apparatus for excavating tunnels

Process and apparatus for lining a tunnel with concrete

Process and device for lining tunnels and ducts having circular