| 摘要 |
PROBLEM TO BE SOLVED: To tow a PC steel wire disposed in the water with a jack by disposing an outer tube at a boundary part between an underwater structure and the water, disposing a charging tube charged with high-viscosity fluid, and towing the PC steel wire with the jack in a such a condition as to pass through the charging tube. SOLUTION: A charging tube 6 is formed by jointing half-split tubes formed by cutting a tube in parallel to its central axis. A perforated disc 8 is fitted on both end surfaces of the charging tube 6. In the disc 8, through-holes for passing PC steel wire 1 are formed according to the number of PC steel wires 1. High-viscosity fluid 9 is charged into a hollow tube where both ends of a tubular body formed by jointing half-split tubes are closed by the perforated disc 8. As the high-viscosity fluid 9 to be charged into the charging tube 6, thermal-melting type adhesive or fluid resin is used. It is thus possible to prevent invasion of water positioned at the bottoms of the strands of the PC steel wire 1.
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