Method and device for transporting overburden away during tunnelling
AssigneeHerrenknecht AG
InventorsWerner Burger, Michael Strässer
Life of this patent
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Abstract
A method and device for transporting overburden away during tunneling includes a seal that separates a first portion and a second portion of a transporting screw arrangement. As a result, in open tunneling or in earth-pressure-assisted tunneling, when the seal is closed, overburden can be transported out of a first opening, arranged ahead of the seal in the direction of removal and, in fluid-assisted tunneling, when the first opening is closed and the seal is open, the overburden can be transported into the second portion.
Claims14
1-8. (canceled)
A method for conveying excavated material away during tunneling, comprising the following steps:
- opening, in a first mode of operation, a first opening of a conveying system disposed first in a direction of conveyance, together with closing a second opening located downstream of the first opening;
- and
- closing, in a second mode of operation, the first opening, together with opening the second opening;
- wherein the first mode of operation is one of an open tunneling operation and an earth pressure balance operation and the second mode of operation is a slurry tunneling operation.
A device for conveying excavated material away in a tunnel boring machine, comprising:
- a first screw conveyor surrounded by a jacket having a working chamber end;
- a first opening formed in said jacket at said working chamber end;
- a second opening formed in said jacket remotely from said working chamber end;
- a selectively operable first seal for said first opening;
- a selectively operable second seal extending through said jacket, said second seal operable to effect fluid mechanical separation between a first section and a second section of said screw conveyor.
Dependencies are inferred from the claim text.