Method and device for keeping outfall drainage in service during

Details Method and device for keeping outfall drainage in service during Method and device for keeping outfall drainage in service during

1996-03-21

1998-04-28

Graysay, Tamara L.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Repair, replacement, or improvement

405141, 405174, F16L 1028

Patent

active

057436762

ABSTRACT:
In a method for keeping outfall drainage in service whilst constructing sewerage, wherein a main drain is laid in the position of an old drain or in a new line by pipe or shield tunnelling under closed or semi-open construction using a working pipe or shield (1) at the tunnelling end (9), at essentially the same time as the working pipe or shield (1) is tunnelling, at least one outfall drain (30) is laid below ground through at least one working orifice (20) in the working pipe or shield (1), so that the outfall drain (30) lies alongside the main drain. A device suitable for implementing the method has a working pipe or a shield (1) with at least one working orifice (20) for laying at least one underground outfall drain (30) alongside the main drain from the interior of the working pipe or shield (1).

REFERENCES:
patent: 3762174 (1973-10-01), Fikse et al.
patent: 4874268 (1989-10-01), Akesaka
patent: 5061120 (1991-10-01), Akesaka
patent: 5505558 (1996-04-01), Brown
patent: 5632574 (1997-05-01), Klaymar et al.
Karnath: "Neuer Kanal im schmalen Schlitz," bd baumaschinendienst, Oct. 1994, pp. 836-840.

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