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    • 10. 发明专利
    • PRE-STRESSED CONCRETE STORAGE TANK
    • JP2002235453A
    • 2002-08-23
    • JP2001030435
    • 2001-02-07
    • SUMITOMO CONST
    • KUMAGAI SHINICHIROKONDO SHINICHIKANEKO MASASHI
    • E03B11/10B65D90/02E03F5/10E04H7/20
    • PROBLEM TO BE SOLVED: To eliminate turbulence of stress distribution by introducing pre-stress almost uniform in the circumferential direction of a concrete wall which is an axially symmetric shell structure, and construct a wall and introduce pre- stress by simple work. SOLUTION: A tension material 11 for introducing pre-stress in the circumferential direction of the concrete wall 3 is formed by coating a steel wire or steel strand wire with a sheath made of synthetic resin, and filling the interior of the sheath with material having fluidity at least before tension force is introduced. A number of tension materials 11 in the circumferential direction are disposed on upper and lower sides, and respectively joined to be circularly closed by a fixture 15 for integrally fixing the end parts of two tension materials extending to both sides. The fixture 15 is buried in the concrete wall 3 uniform in thickness in the circumferential direction, and fixed there, a jack is mounted in a cutout part provided on the outside of the wall, thereby performing introduction of tension and fixing of the tension material to the fixture.