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.
Claims3
A method for conveying excavated material away during tunneling, comprising the following steps:
- providing a first conveying system and a second conveying system, the second conveying system disposed downstream of the first conveying system;
- opening, in a first mode of operation, a first opening of the first conveying system together with closing a second opening located downstream of the first opening and between the first and second conveying systems to separate the first and second conveying systems;
- operating the first conveying system in the first mode of operation with the second conveying system deactivated;
- closing, in a second mode of operation, the first opening, together with opening the second opening;
- operating both the first and second conveying systems in the second mode of operation;
- 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.
Dependencies are inferred from the claim text.