Process and apparatus for continuously lining a tunnel with extr

Details Process and apparatus for continuously lining a tunnel with extr Process and apparatus for continuously lining a tunnel with extr

1987-06-11

1988-09-06

Corbin, David H.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Lining

405146, E21D 1110

Patent

active

047688980

ABSTRACT:
For continuously lining a tunnel with extruded concrete a pumping device for feeding the concrete and a form having an interior form member and a forwardly movable form front are employed. The extruded concrete is put into place without clump formation, when it is provided in equal-sized segments in a plurality of equal constant amounts which are fed in succession one after the other circumferentially in a time interval which is small compared to the hardening time of the concrete. For this purpose the form front is provided with a plurality of concrete input ports uniformly distributed circumferentially and connected with the pumping device, while the pumping device is designed to service the concrete input ports in succession one after the other circumferentially.

REFERENCES:
patent: 3561223 (1971-02-01), Tabor
patent: 3657897 (1972-04-01), Krismer
patent: 4003211 (1977-01-01), Klapdor et al.
patent: 4621947 (1986-11-01), Babendererde et al.

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