Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
Patent
1992-05-05
1993-12-07
Taylor, Dennis L.
Hydraulic and earth engineering
Underground passageway, e.g., tunnel
Boring
4051501, E21D 900
Patent
active
052678148
ABSTRACT:
A mechanism for continuously constructing reinforced concrete tunnels is shown, which comprises a ring-like blade body having a rearwardly tapered inner surface like an earthenware mortar, a cylindrical wall extending integrally and rearwardly from the blade body and defining an inner space, a reinforcement member passage formed in the blade body and communicating the inner space in the cylindrical wall and an outer wall formation zone formed outside the cylindrical wall, and a concrete charging port formed in the blade body for charging concrete under a super-high pressure into the outer wall formation zone.
Through the inner space in the cylindrical wall and the reinforcement member passage is supplied a reinforcement member consisting of a main bar and branch bars in a state with the branch bars held bound together with the main bar, the branch bars becoming perpendicular to the main bar in the outer wall formation zone.
REFERENCES:
patent: 3487649 (1970-01-01), Bergstrom
patent: 3561223 (1971-02-01), Tabor
patent: 3613384 (1971-10-01), Jacobs
patent: 3657897 (1972-04-01), Krismer
patent: 4766145 (1988-10-01), Dykmans
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