Lining repair pipeline technology is based on the successful experience of old pipeline repair abroad, combined with China's national conditions, through domestic repair engineering research and practice, the implementation of buried pipeline trenchless repair technology.
The method is to insert HDPE pipe with a slightly smaller diameter than the original pipe into the original pipe, grouting in the annular gap between the new and old pipes, and consolidate to form a composite structure of the pipe in the pipe, so that the anticorrosion of the HDPE pipe The performance is combined with the mechanical properties of the original pipeline to improve the performance of the old pipeline.
This method is currently recognized as one of the most convenient and economical methods in the world, and is an ideal choice. It reduces the limitations or troubles of maintenance by traditional methods, saves valuable time and cost, and at the same time strengthens the functions of the original pipeline, such as pressure bearing, drag reduction, scale inhibition, corrosion resistance, etc., and extends its service life; and does not need Fully excavated to avoid a lot of construction noise, dust, waste water and sludge, and meet modern environmental awareness requirements.
As a common phenomenon in large and medium-sized cities, with the development of modern city construction, the maintenance and renovation of old drainage pipes in urban areas have become a major problem. Restricted by the conditions, the early anti-corrosion measures of the pipeline are weak. With the continuation of time, these pipelines that have been in operation for nearly 20 years have entered the "middle and late period", and gradually exposed the problems of pipeline body corrosion and strength decline. The lining method is used to transform old pipelines, which has advanced technology, fast speed, low cost, and good social benefits. It provides a method and valuable experience for the repair and transformation of old pipelines.
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