Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Reexamination Certificate
2007-03-06
2007-03-06
Safavi, Michael (Department: 3673)
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
Reexamination Certificate
active
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.
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Akimoto Eiki
Imagawa Akira
Kitahashi Naoki
Kitayama Yasushi
Sugahara Hiroshi
Adachi Construction Industry Co. Ltd.
Safavi Michael
Sekisui Chemical Co. Ltd.
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