Plant, equipment and documentation (03 46074 – 03 46111)

disc cutter (03 46073) with a toothed periphery

rock cutter (03 46071) positioned so as to define the finished diameter of the excavation (01)

gauge cutter (03 46075) mounted so the diameter may be varied and/or so compensation for wear may be provided

mid section between atunnel crown (03 42021) and a tunnel invert (03 42022) excavated in horizontal steps

hoist (12 36026) mounted on a carriage or on a monorail (01) fixed to the roof for lifting empty wagons over full ones in a narrow tunnel (01)

plant (01) used to install tunnel linings (03 42005) situated within or immediately behind a shield machine (BS EN 12336)

short bent bar (01) passed through a hole in a tunnel segment (03 42011) to lift it

pulley wheel, with its axle parallel to the tunnel (01) axis, that is fixed to an assembled tunnel ring (03 42014) to facilitate assembly (01) by hand of the next tunnel ring (03 42014)

bracket (01) temporarily fixed to a tunnel lining (03 42005) and incorporating a roller that, with others, supports a movable gantry (03 52007) or staging (01)

diaphragm of steel or timber (01), across the upper part of a pressurized tunnel (01) to diminish the risk to life caused by a blow out (03 35001) in the case of a flood

compartment at the tunnel face (03 42019) filled with fluid pressurized to balance ground (01) and ground water (BS ISO 6107-1) pressure

water spray from nozzles, in a pattern, to reduce the spread of dust during the excavation (01) of a tunnel (01)

horizontal plate (01) in front of a tunnel shield (03 46032) to trap incoming soft ground (01) and prevent it filling the tunnel shield (03 46032)

safety device placed across track (01) at the top of a slope (01) to halt runaway vehicles

system of lasers and computers (07 22031) that produces a visual display from which an operator can steer a machine or that directly controls the movements of a machine

flexible material placed across a tunnel (01) to limit the spread of material from an explosion

collection of gaseous fumes in a tunnel (01) after blasting (03 24022)

air lock (01) for transfer of plant (01) or material (01)

chamber for the therapeutic recompression and decompression of people suffering from decompression illness (03 39001)

vertical air lock (01) that has separate chambers for materials (01)

and people

chamber, adjacent to but separate from compressed air (BS EN 12110) workings for the decompression of people leaving the compressed air (BS EN 12110) workings

sub-frame upon which a small length of track (01) of a railway (01) is mounted on wheels to allow wagons to be moved from one track (01) to an adjacent parallel track (01)

pump (01) and pipe (01) system that carries cleaned slurry (01) from the separation plant (03 46046) to the slurry machine (03 46111) and return the slurry (01) carrying excavated material

circuit in a pumping system (03 46097) to maintain the flow in the pipe (01) while access to the tunnel face (03 42019) is closed or otherwise unavailable

vehicle that moves on track (01) and consists of a flat surface mounted on a pair of axles

flat car (03 46099) adapted to carry one or more tunnel segments (03 42011) securely

vehicle that moves on track (01) carrying a container for transporting grout (01)

short conveyor for transferring spoil (03 23023) from a machine to a main conveyor or from one conveyor to another travelling in a different direction

prefabricated unit of four rails (04 22051) so spaced to provide track (01) through the central pair of rails (04 22051) as well as the outer pairs and connected by crossovers (04 22043) at each end; the unit is placed above existing track (01) and has ramps (01) at each end

bucket for handling spoil (03 23023), adapted, with safety devices, for carrying people in and out of shafts (01)

metal rod (01) used to scale down (03 44015)

wire suspended down a shaft (01) to provide a vertical line in a survey

trigonometrical device for transferring an above-ground survey to below ground (01)

schedule (10 26009) of the distances of a series of reference points from a reference line

representation of the arrangements, on the exposed surface of the rock (03 23027), of the pattern of entry of shot holes (03 28001), annotated to show the size (01) and depth (01) of each shot hole (03 28001) and the type and amount of explosive (BS 5607) used

in each

operative (01) in a shotcrete (09 33034) gang who manipulates the nozzle and controls final disposition of the material

shield machine (BS EN 12336) for use in soft ground (01) with a bulkhead through which the excavated material (01) is transported from the face in a slurry (01)