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    • 6. 发明专利
    • PLUMBING DEVICE FOR CYLINDRICAL STEEL FRAME
    • JPS55145212A
    • 1980-11-12
    • JP5283479
    • 1979-04-28
    • SHIMIZU CONSTRUCTION CO LTD
    • AOYANAGI NAOICHIYAMANE MASANOBUMIURA HIROSHI
    • E02D13/04E04G21/16
    • PURPOSE:To confirm the perpendicularity of a cylindrical steel frame repeatedly by a method wherein an underwater jack is placed between a cylindrical steel frame and a standing pipe and a target plate fixed on a cylinder axis is supervised by means of a vertical transit. CONSTITUTION:A standing pipe 2 is driven exactly at the erecting position of a cylindrical steel frame 5 and then a vertical hole 3 is formed by a reversing device. An erection truss 10 for bearing the upper part of the cylindrical steel frame 5 inserted into the vertical hole 3 is fixed on the surface of the ground. An underwater jack 20 is inserted between the vertical hole 3 and the cylindrical steel frame 5 and regulates a horizontal and a vertical position of the cylindrical steel frame 5. Moreover, on the main body in the cylindrical steel frame 5 are prepared a flap arm 33 which is in contact with the internal circumference of the cylindrical steel frame 5 and at the upper and lower places in the main body are fixed an upper and a lower target indicating the axial direction of the main body and a perpendicular transit 44 is provided so that the upper and the lower target 39, 40 can be seen through.