Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
Patent
1986-09-18
1988-03-08
Corbin, David H.
Hydraulic and earth engineering
Underground passageway, e.g., tunnel
Boring
299 33, E21D 906
Patent
active
047296933
ABSTRACT:
The digging tool of the tunnel excavator is mounted on a shield support and operates in a forward digging chamber. The digging chamber is sealed from a tunnel formed by the excavator by a separating wall of the excavator across a transverse cross section of the excavator. The digging chamber is filled with a fluid which supports the forward digging chamber wall. The problems resulting from the incompressibility of the supporting fluid can be handled simply when the digging chamber, with at least a portion of its separating wall, is supported so as to be movable longitudinally back and forth by an adjustable spring device. Advantageously, the spring device comprises a plurality of hydraulic cylinder devices whose cylinders are connected to a hydraulic accumulator under gas pressure.
REFERENCES:
patent: 3379024 (1968-04-01), Wohlmeyer
patent: 4311344 (1982-01-01), Akesaka
Brochure "La Ligne D du Metro Lyonais" Semaly Information No. 5 AFTS Symposium, Nov. 27-29, 1984.
Abstract of Lecture from the Proceedings of an International Symposium of the AFTS, Lyon/Nov. 27-29 1984, p. 25.
Metro Information No. 11, Jan. 1984, Semaly, p. 27.
Brochure Metro de Lyon Sous Fluviale Ligne D, p. 4, Principe D-avancement du bouclier, FIGS. 1 to 4, Nov. 27-29 1984.
Schematic Mixschild Baustelle HERRA Hamburg.
Corbin David H.
Dubno Herbert
Hochtief Aktiengesellschaft Vorm, Gebr. Helfmann
Ross Karl F.
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