| 摘要 |
PROBLEM TO BE SOLVED: To provide a reinforcing structure of a hollow concrete structure capable of increasing the proof stress of an object to be reinforced at low cost by filling a hollow part with a lightweight filling body of high strength, and moreover giving cut-off performance. SOLUTION: A large number of small spheres 23 formed of a foam resin material are filled in a hollow part 19 formed in the concrete structure W and having an opening 21, and clearances between the small spheres 23 are filled with a resin body 27 of multi-blowhole shape formed by curing filled resin. The filled resin may be fiber-reinforced resin including long fibers. It is preferable to attach cloth to the inner surface of the hollow part 19. In the reinforcing method of the hollow concrete structure, the concrete structure W is installed in a direction to place the opening 21 on the topside, and a resin filling pipe is inserted from the opening 21 to the bottom part of the hollow part 19. After filling the small spheres 23 in the hollow part 19, the opening 21 is temporarily covered with a cover body formed with air holes. The resin filling pipe is pulled out while injecting uncured liquid resin from the resin filling pipe, and the injected resin is cured. COPYRIGHT: (C)2009,JPO&INPIT
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