Method and device for lining construction in sewer followed...

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement

Reexamination Certificate

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Reexamination Certificate

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10169081

ABSTRACT:
In lining work in which a lining pipe R formed by spirally winding a strip-like member500consisting of an elongated sheet-form body is left in place inside a tubular culvert P, and a new lining pipe is additionally formed in front of this lining pipe that has been left in place, a lining apparatus S which has a flexible forming frame1consisting of link bodies is used. The strip-like member500is wound around the forming frame1by means of a joining mechanism part7attached to the forming frame1, and a lining pipe R is formed while being forcibly folded inward utilizing the flexibility of the forming frame1; at the same time, a back-filling material is injected into the inward-folded part. The inward-folded part later returns to its original state. Alternatively, the diameter of a small-diameter lining pipe R formed by winding around the forming frame201or401is expanded, and lining is performed with the back-filling material injected during this diameter expansion process.As a result of this lining work, a lining pipe R that fills the cross section of the tubular culvert P is formed; at the same time, back-filling work is performed on this long lining pipe.

REFERENCES:
patent: 5101863 (1992-04-01), Fujii et al.
patent: 6033149 (2000-03-01), McAlpine
patent: 6167913 (2001-01-01), Wood et al.
patent: 40 13 333 (1991-10-01), None
patent: 0 902 224 (1999-03-01), None
patent: 2-194928 (1990-08-01), None
patent: 9-207216 (1997-08-01), None
patent: 9-280419 (1997-10-01), None
patent: 11-254531 (1999-09-01), None
patent: 90/05873 (1990-05-01), None

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