All-conditions tunnel boring machine
Antifouling wall structure for use in pipe and method of constru
Apparatus and a method for distributing concrete and similar mat
Apparatus and method for pipeline renovation
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 distributing concrete, especially in the shutterin
Apparatus for producing a wall
Apparatus for the construction of tunnels and shafts
Apparatus for the excavation of subterranean tunnels
Apparatus for underground tunneling
Arched support structure
Arcuate precast tunnel lining segments
Arrangement for transmitting force from a sheet made of polymer
Arrangement of prestressing tendons in a pressure tunnel