Tunnel boring machine anchor shoe structure and process of opera

Details Tunnel boring machine anchor shoe structure and process of opera Tunnel boring machine anchor shoe structure and process of opera

1994-05-09

1996-06-18

Bagnell, David J.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

299 33, 405142, E21C 2902, E21D 910

Patent

active

055270999

ABSTRACT:
The anchor shoes of a tunnel-boring machine arranged in a circular configuration are individually truncated by being tapered rearwardly so that the girth of the circular anchor shoe configuration can decrease progressively in order to accommodate convergence of superincumbent ground pressure. Preferably the anchor shoes are mounted for tilting of their aft portions to enable the degree of convergence or constriction to be altered. Chordal jacks connecting adjacent anchor shoes exert pressure on them resisting inward swinging of the aft portions of the anchor shoes resulting from superincumbent ground pressure.

REFERENCES:
patent: 4420188 (1983-12-01), Robbins et al.
patent: 4548443 (1985-10-01), Turner
patent: 4915453 (1990-04-01), Fikse
patent: 5005911 (1991-04-01), Fikse
patent: 5205613 (1993-04-01), Brown, Jr.

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