Process for making a tunnel and advancing a tunneling read with

Details Process for making a tunnel and advancing a tunneling read with Process for making a tunnel and advancing a tunneling read with

1988-08-15

1990-03-27

Corbin, David H.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

405147, E21D 906, E21D 1110

Patent

active

049115782

ABSTRACT:
In my process for digging a tunnel with the help of a tunnel excavator which has a working chamber under atmospheric pressure, the local front wall is supported with the help of a pressurized medium which is connected by a controlling gap of a shield cover with another gap between a shield cover tail and/or the earth or ground and a tunnel-lining member. The gap is closed-off from the working chamber by a gap-sealing ring between a shield cover tail and a tunnel-lining member. Concrete is forced into the gap by a feeder pipe in the gap-sealing ring. A self-sealing permeable joint between the gap-sealing ring and the shield cover tail and/or the tunnel-lining member of the excavator is made with concrete which has a fine-grained additive material and a large-grained additive material so that the large-grained additive material forms a grain filter whose pores are closable by the fine-grained additive material.

REFERENCES:
patent: 3672173 (1972-06-01), Paramore et al.
patent: 3774683 (1973-11-01), Smith et al.
patent: 3845632 (1974-11-01), Slobod et al.
patent: 4437788 (1984-03-01), Walbrohl
patent: 4645378 (1987-02-01), Hentschel
patent: 4695188 (1987-09-01), Pulkkinen
patent: 4789267 (1988-12-01), Babendererde et al.

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