Pipe rehabilitation method
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United States of America Patent
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Dec 13, 2016
Grant Date -
Jun 2, 2016
app pub date -
Nov 20, 2015
filing date -
Nov 20, 2015
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Abstract
An existing pipe that is to be rehabilitated has concavely curved portions and straight portions as viewed in cross-section orthogonal to the longitudinal direction of the existing pipe. For pipe rehabilitation at the curved portion of the existing pipe, a plurality of rectangular parallelepiped segments whose inner surface plate, side plates and end plates are all rectangular are used. A spacer is interposed between the end plates of the rectangular parallelepiped segments. The spacer has first and second contact surfaces that are inclined relative to each other and come into contact with the end plates of the rectangular parallelepiped segments when they are linked in the circumferential direction.
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