Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
Patent
1986-12-18
1989-02-28
Reese, Randolph A.
Hydraulic and earth engineering
Underground passageway, e.g., tunnel
Boring
405142, 405145, 405151, 264 33, 425 63, E21D 906, E21D 1110
Patent
active
048080306
ABSTRACT:
Shield tunnelling method and assembling and disassembling apparatus for use in practicing the method. A shield having shield jacks is actuated for drilling a hole in the ground. Inner forms and outer forms are assembled into a plurality of tubular units coaxially jointed in the hole so that an annular concrete lining space is defined between the inner forms and the outer forms, the tubular units having a leading tubular unit.
The shield jacks are applied against inner forms of the leading tubular units for thrusting the shield during actuating of the shield to further drill the hole. A concrete is injected into the annular concrete lining space to form a concrete lining. The concrete lining within a predetermined length of tubular units is set for providing adhesion to the inner forms, in contact with the concrete lining, against a reaction force of the jack thrust for the shield. Inner forms of the tubular units, located behind the predetermined length of the tubular units, are disassembled from the associated outer forms so that the predetermined length of the concrete lining is remained covered with inner forms. The inner forms disassembled are reused in the assembling of inner forms and outer forms for assembling a new tubular unit in the hole just behind the shield.
REFERENCES:
patent: 3678694 (1972-07-01), Haspert
patent: 3859810 (1975-01-01), Winberg et al.
patent: 4072021 (1978-02-01), Yamazaki
patent: 4621948 (1986-11-01), Hentschel
patent: 4627765 (1986-12-01), Hentschel
patent: 4645378 (1987-02-01), Hentschel
Reese Randolph A.
Ricci John A.
Shimizu Construction Co. Ltd.
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