Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1988-10-19
1989-10-17
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
405146, 405154, 175 62, E02D 2910
Patent
active
048742686
ABSTRACT:
An apparatus for building a new pipeline while breaking a plurality of existing pipelines extending parallel to each other, comprises: a shield tunnelling machine for performing the excavating operation while breaking opposed portions of a plurality of existing pipelines; and a basic thrust mechanism for thrusting a new pipe into a space obtained through excavation by the machine while advancing the machine; wherein the shield tunnelling machine includes a shield body, a cutter assembly disposed in front of the shield body to be rotatable about the axis parallel to the axis of the body and dimensioned for breaking opposed portions of the existing pipelines while the body is advanced and a pair of stabilizers positioned on the outer periphery of the body so as to project respectively from a pair of opposite outer peripheral portions of the body and dimensioned to be slidably engaged with the remaining portion of the existing pipelines opposed to each other when the body is advanced.
REFERENCES:
patent: 3630295 (1971-12-01), Coyne et al.
patent: 3805899 (1974-04-01), Hicks et al.
patent: 4647256 (1987-03-01), Hahn et al.
Kabushiki Kaisha Iseki Kaihatsu Koki
McBee J. Russell
Taylor Dennis L.
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