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    • 45. 发明专利
    • SEGMENT FOR INTAKE TUNNEL
    • JPH11148150A
    • 1999-06-02
    • JP31685097
    • 1997-11-18
    • OHBAYASHI CORP
    • MIYA KIYOSHITANAKA YOSHIHIRO
    • E03B3/06E02B5/00E03B3/04E21D11/04E21D11/08
    • PROBLEM TO BE SOLVED: To improve intake performance, and to increase shear strength. SOLUTION: A segment unit 12 has a segment body 12a, a permeable layer 12b, intake holes 12c, a cover body 12d and a perforated permeable plate 12e. Flanges 120a are formed at both ends in the longitudinal direction in the main body 12a, and a recessed section 121a is formed between the flanges 120a. The intake holes 12c are closed during construction works by the detachably screwed and fixed cover body, and opened by detaching the cover body after the building of the intake tunnel. The perforated permeable plate 12e is mounted so as to cover the outsides of the intake holes 12c, and formed in an arched shape. A large number of continuous voids are formed to the permeable layer 12b, the permeable layer 12b consists of a porous body having water permeability, and the inside of the recessed section 12a on the outside of the perforated permeable plate 12e is filled with the permeable later 12b and the permeable layer 12b is solidified.