Lifting equipment and method of box girder integral steel reinforcement framework

Abstract

The invention provides a hoisting device and a hoisting method used for a box girder whole rebar frame, relating to the upper structure construction equipment of bridges. The hoisting device comprises a main beam a and a main beam b which are parallel and truss-structural; one end of the main beam a and one end of the main beam b are respectively connected with a front leg; the other ends of the main beam a and the main beam b are respectively connected with a rear leg; the middle parts of the main beam a and the main beam b are connected with at least a middle leg; the main beam a and the main beam b are respectively provided with at least two electric blocks which can move forwards and backwards along the main beam; the bottom of the rear leg is provided with a rear leg wheel box provided with a driving wheel; the bottom of the middle leg is provided with a middle leg wheel box provided with the driving wheel; the length of the front leg is more than that of the middle leg and the rear leg. The hoisting method of the invention replaces the sequential operation with parallel operation, and the box girder whole rebar frame can be hoisted in place on a girder surface with at least one cell cast in advance, then the box girder concrete is cast in-situ on the pier, thus being especially suitable for use matched with movable frames and effectively improving the bridge construction speed.

Description

technical field [0001] The invention relates to bridge superstructure construction equipment, in particular to a hoisting equipment and a hoisting method for an integral reinforced frame of a box girder. Background technique [0002] Concrete box girder reinforcement construction has always used the method of loosening in the formwork, that is, pre-bending various types of steel bars into shape, and then using the formwork as the tire formwork to bind the bottom, web reinforcement and install prestressed tunnels, and then install the inner Form and adjust the size of each part, and then bind the roof bridge deck steel bars on the top surface of the inner formwork. After the steel bars are bound, start pouring concrete. In this method, since only sequential construction can be adopted, parallel operations cannot be carried out, so the construction time is long, the work efficiency is low, and it is difficult to ensure the quality of the beam body. [0003] In order to shorte...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the existing difficulties or deficiencies in the prior art, the object of the present invention is to provide a hoisting device and hoisting method for the overall steel frame of a box girder, which changes sequential operations into parallel operations, and enables beams with at least one hole to be poured in advance. Hoist the overall reinforced skeleton of the box girder in place on the surface, and cast in-situ box girder concrete on the pier, which is especially suitable for use with mobile formwork, which can effectively increase the speed of bridge construction

Images