Block unit for repairing flow passage facilities and method of repairing flow passage facilities
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United States of America Patent
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Jun 6, 2006
Issued Date -
N/A
app pub date -
Sep 26, 2002
filing date -
Jan 23, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A block unit for repairing flow passage facilities is provided for permitting a desired repair operation. A method of repairing flow passage facilities using the block unit is also provided. The block unit includes an inner plate defining an inner surface, an outer plate disposed along a peripheral edge of the inner plate, and a plurality of reinforcing ribs for reinforcing the inner plate and the outer plate. The block units adjoining in a circumferential direction are joined together with bolts inserted through both circumferential end faces of each the block unit and nuts fitted on the bolts to form a short tube within a flow passage. The short tubes are connected in a longitudinal direction to form a continuous tubular assembly having an outer diameter smaller than an inner diameter of the flow passage. A grout material is injected into a clearance space formed between the tubular assembly and the flow passage.
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