Method and device for controlling the trajectory of a shield-typ

Details Method and device for controlling the trajectory of a shield-typ Method and device for controlling the trajectory of a shield-typ

1988-04-18

1990-02-27

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

299 1, 405141, E21D 906

Patent

active

049041150

ABSTRACT:
Method of controlling the trajectory of a shield-type tunnelling machine equipped with displacement control hydraulic rams (3), characterized in that, these rams being divided into at least three groups of rams (6A, 6B, 6C), the theoretical instantaneous flowrates of fluid to be applied to each of these groups are continuously determined (40) from the curvature characteristics and the overall rate of advance set point trajectory and these groups (7-26-27-28) are supplied with instantaneous flowrates, the values of which correspond to the theoretical values.

REFERENCES:
patent: 2139563 (1938-12-01), Russell
patent: 4228508 (1980-10-01), Benthaus
patent: 4322113 (1982-03-01), Taylor et al.
patent: 4412758 (1983-11-01), Heitkamp et al.
patent: 4513504 (1985-04-01), Nussbaumer et al.
patent: 4648659 (1987-03-01), Masovich et al.

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