Existing pipeline renewing method and apparatus therefor

Details Existing pipeline renewing method and apparatus therefor Existing pipeline renewing method and apparatus therefor

1989-02-06

1990-04-10

Taylor, Dennis L.

Hydraulic and earth engineering

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

With forming or cutting of pipe or cable

405154, 405184, 299 58, E03F 306

Patent

active

049155431

ABSTRACT:
A method for renewing an existing pipeline comprises the steps of advancing a shield tunnelling machine from one end of an existing pipe defining the existing pipeline to the other end thereof, excavating at least the existing pipe by the machine and disposing a new pipe in an excavated spot while the machine is advanced, whereby the existing pipeline is renewed by breaking the existing pipe embedded in the ground while laying the new pipe therein. An existing pipeline renewing apparatus embodying the method described above comprises a shield tunnelling machine for excavating an existing pipe embedded in the ground so as to define an existing pipeline and a means for disposing a new pipe in a spot excavated by the machine. Accordingly, since the new pipe is disposed while excavating the existing pipe by the shield tunnelling machine, it is not necessary to excavate the spot, in which the existing pipe to be renewed is laid, by an open cut method.

REFERENCES:
patent: 4176985 (1979-12-01), Cherrington
patent: 4311344 (1982-01-01), Akesaka
patent: 4406498 (1983-09-01), Akesaka
patent: 4534676 (1985-08-01), Saito
patent: 4553877 (1985-11-01), Edvardsen
patent: 4692062 (1987-09-01), Akesaka

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