| 摘要 |
PROBLEM TO BE SOLVED: To provide a water leakage preventive structure for reducing work man-hours in a tunnel, improving an external appearance of the finish, and applicable not only to a vertical joint nut also to a horizontal joint and any crack in a concrete wall of the tunnel. SOLUTION: In this water leakage preventive structure of the tunnel, a water introducing groove 12 is formed along the joint 11 or the crack on the concrete wall 10 inside of the tunnel, a surface opening part of the water introducing groove 12 is sealed by fitting and adhering columnar packing 20 to the surface opening part of this water introducing groove 12, and this water introducing groove 12 is connected to a drainage ditch of a tunnel lower part. The columnar packing 20 is formed of a foaming body of independent foam composed of rubber, a thermoplastic resin or thermoplastic elastomer. The columnar packing 20 is pressed in and adhered to the water introducing groove 12 so as to become flush with a surface of the concrete wall 10, and a belt-like cover sheet 26 composed of elastomer is stuck over the surface of both side concrete walls 10 for sandwiching the columnar packing 20. COPYRIGHT: (C)2004,JPO
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