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    • 18. 发明专利
    • SHIELD TUNNEL CONSTRUCTION METHOD
    • JPH10140994A
    • 1998-05-26
    • JP30265796
    • 1996-11-14
    • KAWASAKI STEEL CO
    • MASUDA TOSHIICHIOSADA TOSHIOTAKABE RYOJI
    • E21D11/15
    • PROBLEM TO BE SOLVED: To improve the efficiency of lining or a machine tail portion by carrying a plate shell prepared outside a tunnel to a place near the tail portion of a shield machine at the other end of the tunnel and by widening the diameter, making it into a true-circular cylinder and connecting to an existing segment. SOLUTION: A plate shell 2 having a lap portion in a peripheral direction is prepared outside a tunnel way 1, the plate shell 2 is placed on a carriage 3 and carried to a place near a tail portion of a shield machine at the other end portion. Then, at that plate, its diameter is widened with jacks or the like, both the ends of the periphery are fastened with bolts and made into a true-circular cylindrical shape and connected to existing segment. In this case, the diameter of plate shell 2 when widening the diameter is made larger in response to the stroke of the jack, and the number of the plate shells 2 is set depending on the carrying capacity of a carriage 3 for instance. By doing this, the number of parts can be considerably reduced, the length of connecting portion can be shortened, and man-hour can be considerably reduced, working hours can be shortened thereby increasing the speed of excavation.