Install compressible polyester non-woven fabric as a backing material, and rehabilitate by pushing a rigid polyvinyl chloride pipe with a self-supporting screw joint into place using a hydraulic jack.
This is a rehabilitation method classified as a small-diameter casing pipe method, where a compressible tubular elastic material primarily made of polyester non-woven fabric is pulled into the existing pipe and expanded using air pressure. A rigid polyvinyl chloride pipe with self-supporting performance and screw joints, manufactured in a factory, is then pushed in using a hydraulic jack for rehabilitation. The small-diameter casing pipe method faces challenges in securing a gap with the existing pipe due to the need to maintain the flow cross-section within the sewer pipe. This technology ensures more stable quality by using FM materials, which are factory-made secondary products, instead of conventional filling materials, and eliminates the curing period required during the filling material installation, thus achieving reduced construction time and improved workability. [Applications] ● Reconstruction and extension of the lifespan of aging or damaged sewer pipes (Ø250 to 450) ● Strength restoration ● Improvement of water tightness against infiltration, enhancement of flow characteristics, corrosion resistance, prevention of tree root intrusion, and increased seismic resistance.
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basic information
【Features】 ● The construction time is fast due to repeated insertion, and it is not affected by weather or site conditions. ● Using factory-made secondary products minimizes wrinkles and unevenness, ensuring stable quality. ● There are no odors or noise. ● Construction is possible even with infiltrating water. ● Improved seismic resistance due to cushioning properties. ● Easy to construct with a small working area.
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Applications/Examples of results
【Purpose】 ● Reconstruction and extension of the lifespan of aging or damaged sewer pipes (Ø250 to 450) ● Strength restoration ● Improvement of water tightness against infiltration, enhancement of flow characteristics, corrosion resistance, prevention of tree root intrusion, and improvement of seismic resistance
Company information
Since its establishment, our company has played a role in national construction, primarily focusing on the "ground improvement field" with our unique grouting method. Subsequently, in response to the changes in social infrastructure development, we have refined our technologies to adapt to the needs of the times and, at times, acquired new ones to expand our business scope. As a result, we have now established three main pillars: "ground improvement business," "slope disaster prevention business," and "pipeline business."
