| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem in a conventional arch concrete curing method requiring labor of attaching and detaching a sheet to and from the inside of arch concrete. SOLUTION: A curing agent 5 is sprayed to an arch concrete inner surface 7 from a spraying device equipped at the arch center, and stuck so that the curing agent 5 may not drip, and drying on the arch concrete inner surface 7 side is suppressed by the curing agent 5 to efficiently cure the arch concrete 6. A guide 2 of upward open gutter shape is arranged on the rear end side of the arch concrete placing arch center or a rear projecting position from the rear end. In this case, an upward opening is arranged toward the arch concrete 6, and a spray tube or a hose 3 provided with a plurality of nozzles is arranged. When the curing agent 5 is jetted from the nozzles 4, the curing agent 5 is sprayed and stuck to the arch concrete inner surface 7. COPYRIGHT: (C)2009,JPO&INPIT
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