Trenchless integrative repair method for concrete drainage pipeline with cracking, corrosion and subsidence

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United States of America Patent

PATENT NO 11473713
APP PUB NO 20200256498A1
SERIAL NO

16858731

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Abstract

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A trenchless integrative repair method includes steps of: S1, pre-casting steel rings according to an internal diameter of a defect pipeline, and forming grouting holes in the steel rings; S2, loading the steel rings to a defect position inside the pipeline, and fitting the steel rings to an internal wall of the pipeline to form reinforcing rings; S3, selecting a number of the grouting holes according to subsidence distribution; drilling a hole in the pipeline to reach a subsidence position and inserting a grouting pipe; steadily grouting the subsidence position with a polymer grouting system, and observing a lift condition of the pipeline; removing the grouting pipe after the pipeline is lifted to a predetermined level; and S4, pulling a lining pipe into the pipeline, and fitting the lining pipe to the steel rings and pipeline walls adjacent to the steel rings; curing the lining pipe.

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Patent Owner(s)

Patent OwnerAddress
INFRASTRUCTURE RENEWAL INSTITUTE OF SOUTHERN CHINAGUANGDONG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fang, Hongyuan Guangdong, CN 28 9
He, Hang Henan, CN 27 52
Li, Bin Henan, CN 1200 10531
Pan, Yanhui Henan, CN 23 6
Wang, Fuming Guangdong, CN 48 69
Zhao, Peng Henan, CN 285 2308

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