Method for rehabilitating existing pipes, and rehabilitation pipe segment used in the rehabilitating method
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United States of America Patent
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Jan 29, 2013
Grant Date -
Jun 10, 2010
app pub date -
Dec 3, 2009
filing date -
Dec 4, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An existing-pipe rehabilitation method for constructing a rehabilitation pipe inside an existing pipe to rehabilitate the existing pipe. A rehabilitation pipe is constructed inside an existing pipe by coupling segments in the circumferential direction and the lengthwise direction of the existing pipe so that the rehabilitation pipe has a constant outer diameter. A lining material impregnated with a liquid curable resin is inserted into the rehabilitation pipe thus constructed. The liquid curable resin is cured to line the internal circumferential surface of the rehabilitation pipe with the lining material so that an inner diameter of the rehabilitation pipe lined with the lining material is smaller than an inner diameter of the existing pipe.
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