Earth pressure system shield process
Easily-cuttable tunnel segment structure
Element for tunnel-type metal shuttering
Elongated underground construction having a uniform section and
Enclosed structures of very large cross-section, such as conduit
Excavated earth and sand transporting apparatus for use in a shi
Excavating machine for tunnels and galleries
Excavation controlling method in hydraulic shield tunnelling
Flood isolation dam
Foam blocks for construction of mine tunnel stoppings
Foam slabs in mine tunnel stoppings
Foaming composition
Form assembly for making covering wall of tunnel made by shield
Form for concrete-placement tunnel lining
Form for making a permanent concrete mine stopping
Form handling system
Forming a passageway through the ground
Formwork apparatus
Grouting method and apparatus
Guidance system and method for keeping a tunnel boring machine c