Large steel girder member bar turning device and its member bar turning method

A large-scale steel girder truss lever turning-over device and a method for turning over the lever relates to the equipment for turning-over the large-scale girder truss lever and the turning-over method. The turning-over device is composed of a concrete pedestal, a turning-over wheel body, a steel supporting leg, an end rotating buckle, a locking device and the like. The turning-over course comprises the following steps: connecting the steel girder truss lever, installing the turning-over wheel body locking device and fixing, installing the underlay, when the steel girder truss lever to be turned over is lifted and installed to the position, screwing the bolt and installing the steel wire cable and windlass, releasing the locking device, when the steel girder truss is turned to the right position, releasing the connecting bolt of the turning-over wheel body, and the turning over of the steel girder truss lever is completed. The turning-over device can better protect the steel girder lever ...

Method for measuring and controlling tower column and cable pipeline in synchronous construction of tower and beam of cable-stayed bridge

The invention provides a method for measuring and controlling a tower column and a cable pipeline in synchronous construction of a tower and a beam of a cable-stayed bridge. The method comprises the following steps: filtering the deformation of the tower column under the actions of sunshine, temperature gradient and unbalanced load out by adopting a time-segmented measurement comparison method; setting a measuring and control point on the tower column; and establishing an independent coordinate system for controlling spacial positions of the tower column and the cable pipeline. By using the method, the construction of the tower column can be measured and controlled in all weather, so that the method improves the measuring and control precision of the tower column and the cable pipeline, solves the key difficult technical problem of the synchronous construction of the tower and the beam of the cable-stayed bridge, and has great benefit to improving the construction efficiency and the quality ...

Large steel girder member bar turning device and its member bar turning method

Method for measuring and controlling tower column and cable pipeline in synchronous construction of tower and beam of cable-stayed bridge

The invention provides a method for measuring and controlling a tower column and a cable pipeline in synchronous construction of a tower and a beam of a cable-stayed bridge. The method comprises the following steps: filtering the deformation of the tower column under the actions of sunshine, temperature gradient and unbalanced load out by adopting a time-segmented measurement comparison method; setting a measuring and control point on the tower column; and establishing an independent coordinate system for controlling spacial positions of the tower column and the cable pipeline. By using the method, the construction of the tower column can be measured and controlled in all weather, so that the method improves the measuring and control precision of the tower column and the cable pipeline, solves the key difficult technical problem of the synchronous construction of the tower and the beam of the cable-stayed bridge, and has great benefit to improving the construction efficiency and the quality ...