Floating shoe tunnel boring machine and boring process

Details Floating shoe tunnel boring machine and boring process Floating shoe tunnel boring machine and boring process

1988-04-18

1990-04-10

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

299 33, 405138, 405142, F21C 2902, F21D 908

Patent

active

049154532

ABSTRACT:
A tunneling machine body carrying a rotary cutterhead can be advanced continuously by exerting advancing thrust forces on it, first by top and bottom bipods reacting from top and bottom anchor shoes, respectively, in anchored condition against the tunnel wall and alternately by side bipods exerting advancing force on the tunneling machine body and reacting from side anchor shoes set in anchored condition against the tunnel wall. The anchor shoes are floating relative to the tunneling machine body and connected to it only by the bipods producing the thrust for advancing the tunneling machine body. The top and bottom anchor shoes are directly connected by two pairs of upright fluid-pressure shoe-setting jacks extending chordwise between such shoes. The side anchor shoes are directly connected by two pairs of transverse fluid-pressure shoe-setting jacks extending chordwise between such shoes. The two pairs of upright anchor-setting jacks are located close together longitudinally of the tunnel boring machine and between the two pairs of transverse jacks. A conveyor for removing muck from a location adjacent to the tunnel face extends rearwardly through the tunneling machine body and between the pairs of the upright and transverse anchor shoe-setting jack pairs.

REFERENCES:
patent: Re31511 (1984-01-01), Spencer
patent: 3203737 (1965-08-01), Robbins et al.
patent: 3295892 (1967-01-01), Winberg et al.
patent: 3861748 (1975-01-01), Cass
patent: 3967463 (1976-07-01), Grandori
patent: 4420188 (1983-12-01), Robbins et al.
patent: 4548443 (1985-10-01), Turner

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