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US 4,259,759 AGranted
Concrete bridge girder support structure and cantilever erection method using same
AssigneeOiles Industry Co., Ltd.
InventorHiroshi Tada
Life of this patent
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AssigneeOiles Industry Co., Ltd.
InventorHiroshi Tada
Estimating the term…
A concrete bridge girder support structure for use in a cantilever erection method is disclosed. The support structure comprises an upper shoe for use as a fixture to the girder through a sole plate fixed to the girder at a predetermined position, a lower shoe fixed on a pier and abutment, a movable part(s) disposed between the upper and lower shoes, and a movable plate placed for bridge-axial movement relative to the upper shoe. A concrete bridge girder erection method using such a support structure is also disclosed. The girder having the sole plate fixed thereto at the predetermined position is carried on the movable plate and continuously advanced along the upper shoe up to a predetermined erection position with bridge-axial movement of the movable plate. At the erection position, the sole plate is integrally fixed to the upper shoe of the support structure.
A concrete girder support structure for use in a cantilever erection method comprising an upper shoe for fixing to a girder through a sole plate fixed thereto at a predetermined position, a lower shoe fixed to a pier abutment, a movable part disposed between the upper and lower shoes, and a movable plate on the upper shoe for bridge-axial movement relative to the upper shoe, a sliding member provided between the movable plate and the upper surface of the upper shoe, a first holder device at one end of said movable plate, and, a second holder device at the side of the lower shoe, the other end of the movable plate being wound as it slides by said second holder device, whereby the girder having the sole plate fixed thereto at a predetermined position and carried on the movable plate can be continuously moved together with the movable plate through the assistance of the sliding member.
A concrete bridge girder support structure for use in cantilever erection, comprising an upper shoe for fixture to the girder through a sole plate fixed thereto at a predetermined position, the upper shoe formed on its upper surface with an upward facing center recess, a lower shoe fixed on a pier and abutment, a movable section disposed between the upper and lower shoes, a long movable plate placed for bridge-axial movement relative to the upper shoe, the sole plate formed in its lower surface with a downward facing center recess corresponding to the upward facing recess of the upper shoe, a stopper means suspended within the downward facing recess by a mounting bolt extending through the girder such that it can be placed in both of the upward and downward facing recesses by turning movement of the mounting bolt to restrict horizontal movement of the sole plate with respect to the upper shoe when the downward facing recess of the sole plate comes in agreement with the upward facing recess of the upper shoe, whereby the girder having the sole plate fixed thereto at the predetermined position and carried on the movable plate can be continuously moved axially of the bridge together with the movable plate.
A concrete bridge girder cantilever erection method using a support structure including an upper shoe for fixture to the girder through a sole plate fixed thereto at a predetermined position, a lower shoe fixed on a bridge pier and abutment, a movable section disposed between the upper and lower shoes, and a long movable plate placed for bridge-axial movement relative to the upper shoe, comprising the steps of driving a pushing device directly installed on the pier or girder to continuously slide the movable plate carrying thereon the girder forward along the upper shoe together with the movable plate up to a predetermined erection position at which the sole plate comes in agreement with the upper shoe of the support structure, removing the movable plate and the pushing device, and fixing the sole plate integrally to the upper shoe.
Dependencies are inferred from the claim text.