Abstract: A fabricated rapid construction platform for a bridge, wherein the construction platform comprises a fixing frame, an upper-layer tubular pile position control structure (6), a lower-layer tubular pile position control structure (7), and a console; the fixing frame comprises a bottom rail platform (1), supporting posts (3), a top operation platform (2), and several supporting legs (4); the upper-layer tubular pile position control structure (6) and the lower-layer tubular pile position control structure (7) are provided between the bottom rail platform (1) and the top operation platform (2); the upper-layer tubular pile position control structure (6) comprises two sub-structures arranged symmetrically about the central axis of a second through hole, and each sub-structure comprises a braking device (61), a vertical control arm (63), and a horizontal control arm (62).

Abstract: A machining method for three-dimensional open flow channel using high-speed arc discharge layered sweep, which arranges an axial line of an installation shaft of a tool electrode with six degrees of freedom to be perpendicular to an axial line of a to-be machined work piece in an arc discharge process, with the tool electrode sweeping in a closed path in a plane or a curved surface perpendicular to the installation shaft, wherein the path of the sweeping satisfies: a space of an enveloped space being formed by the tool electrode moving in the path and being coincident with a removed portion of the work piece does not exceed a preset machined cavity of the flow channel. The present invention is based on high-speed arc discharge of hydrodynamic arc breaking and realized layered milling and surface machining for three-dimensional open flow channels.

Abstract: A machining method for three-dimensional open flow channel using high-speed arc discharge layered sweep, which arranges an axial line of an installation shaft of a tool electrode with six degrees of freedom to be perpendicular to an axial line of a to-be machined work piece in an arc discharge process, with the tool electrode sweeping in a closed path in a plane or a curved surface perpendicular to the installation shaft, wherein the path of the sweeping satisfies: a space of an enveloped space being formed by the tool electrode moving in the path and being coincident with a removed portion of the work piece does not exceed a preset machined cavity of the flow channel. The present invention is based on high-speed arc discharge of hydrodynamic arc breaking and realized layered milling and surface machining for three-dimensional open flow channels.