Dismounting method and mounting method of section-spliced bridge girder erection machine

Abstract

According to the dismounting method and the mounting method, by adjusting the positions of a crown block and supporting legs of the bridge girder erection machine, on the premise that the anti-overturning moment of the bridge girder erection machine is kept larger than the overturning moment, and enough safety coefficients are reserved, a main beam of the bridge girder erection machine is mounted or dismounted while longitudinally moving and pushing; the hoisting machinery can be selectively positioned on the bridge floor or the ground according to actual conditions, and by adopting the method, the hoisting capacity of the hoisting machinery for mounting or dismounting the bridge erecting machine can be greatly reduced, so that the weight of the hoisting equipment is reduced, and under the conditions of safety and high efficiency, not only can the safety of a bridge structure be ensured, but also the mounting and dismounting cost of the bridge erecting machine can be reduced.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a dismantling method and an installation method of a joint bridge erecting machine. Background technique [0002] For highway engineering construction or bridge engineering construction, the use of concrete prefabricated beam assembly construction technology is becoming more and more common, and the use of segmental assembly bridge erecting machines is also increasing. Segmentally assembled bridge erecting machines are usually installed and dismantled by using lifting equipment, and the selection of hoisting machinery for installation and removal of conventional segmentally assembled bridge erecting machines is greatly affected by the main girder of the bridge erecting machine. [0003] At present, the main girder is often installed or removed under the bridge by a single large-scale hoisting machine, or by two large-scale hoisting machines. Lifting capacity is very ...

AI Technical Summary

Problems solved by technology

[0003] At present, the main girder is often installed or removed under the bridge by a single large-scale hoisting machine, or two large-scale hoisting machines are used to lift, install or remove it under the bridge, so the hoisting equipment selected for installation or removal of the bridge erecting machine The lifting capacity is very large, and it is difficult to meet the requirements

If two cranes are used to lift and install or remove the main girder on the bridge deck, due to the limited site conditions, the installation or removal site of the bridge erecting machine is narrow, and the bridge is often difficult to bear the load of large equipment

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