All-conditions tunnel boring machine

Apparatus and a method for distributing concrete and similar mat

Apparatus and method for providing negative buoyancy for tunnel

Apparatus and method for tunnel construction with shield drive

Apparatus for and method of driving tunnels

Apparatus for and method of driving tunnels

Apparatus for construction of continuous article having bores

Apparatus for controlling direction of underground excavator

Apparatus for detecting position of underground excavator and ma

Apparatus for the construction of tunnels and shafts

Apparatus for the excavation of subterranean tunnels

Apparatus for underground tunneling

Arrangement of prestressing tendons in a pressure tunnel

Articulated shield tunneling machine

Automatically advancing supporting and sliding form for introduc

Block unit for repairing flow passage facilities and method...

Bracing device for a self-advancing shield tunnelling machine

Brush-type packing means for shield excavator

Circular heading machine

Concrete lining machine