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    • 11. 发明专利
    • METHOD FOR CONNECTING SHIELD TO EXISTING TUNNEL
    • JP2000356092A
    • 2000-12-26
    • JP16987999
    • 1999-06-16
    • PENTA OCEAN CONSTRUCTION
    • UEDA MASAKIHIRAI MIKIOTAKAHASHI HARUOFURUTA TETSUO
    • E21D9/06
    • PROBLEM TO BE SOLVED: To provide a method for connecting a shield to an existing tunnel which enables the lining on an existing tunnel to be cut while maintaining a stable condition without loosing its balance, and which enables cutoff of water to be easily and completely achieved after completion of cutting, without water leaking into the tunnel. SOLUTION: When a shield machine 12 having a freely rotating cutter ring 14 with a cutting bit at its end is used to excavate a new tunnel 11 in a direction perpendicular to an existing tunnel 10 and a through hole is formed by advancing the cutter ring 14 at a position proximate to the existing tunnel 10 and cutting the lining on the existing tunnel, a layer 16 of banking material made of concrete or the like with a thickness such that the end of the cutter ring 14 does not protrude into the existing tunnel 10 at the completion of cutting done by the cutter ring 14 is formed in advance on the inner surface of the existing tunnel 10 at the position where the new tunnel is connected with the existing tunnel, and after the lining 10a on the exiting tunnel 10 is cut away by the cutter ring 14, the part of the layer 16 of banking material inside the cutter ring is removed to open the through hole.