Section assembling bridge girder erection machine

Abstract

The invention relates to a small-size cantilever assembling bridge girder erection machine which is suitable for longspan bridges and is especially suitable for erecting a prefabricated section bridge of large span and small curvature bend. The section assembling bridge girder erection machine provides the following technical scheme that the section assembling bridge girder erection machine is characterized by comprising a rack with a bridge travelling channel, wherein the upper side and the lower side of the rack are respectively provided with a rail; the rail on the upper side is provided with a hoisting device; the lower-side rail is provided with a middle supporting leg and an assistant supporting leg; and two ends of the rack are respectively provided with a front supporting leg and a rear supporting leg. The invention aims to provide a small-size cantilever assembling bridge girder erection machine which is used for erecting the longspan bridges, the requirements on rigidity and lower cost of the bridge girder erection machine is met by the longspan bridges.

Description

technical field [0001] The invention relates to a small-sized cantilever assembled bridge erecting machine suitable for long-span bridges, in particular suitable for the erection of prefabricated segmental bridges with large spans and small curvature curves. Background technique [0002] At present, in the design of bridges, especially railway bridges and sea-crossing bridges, the span of erected bridges is getting larger and larger, and the size of bridge erecting machines that meet the needs is correspondingly increased. Due to the limitations of a series of conditions such as transportation conditions and welding processes, the The size and rigidity requirements of the bridge erecting machine are becoming more and more stringent. At present, the longitudinal dimension of the segmental assembly bridge erecting machine that meets the requirements is about greater than the distance between the two piers, so the distance between the two fulcrums of the bridge erecting machine ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the design of bridges, especially railway bridges and sea-crossing bridges, the span of erected bridges is getting larger and larger, and the size of bridge erecting machines that meet the needs is correspondingly increased. Due to the limitations of a series of conditions such as transportation conditions and welding processes, the The size and rigidity requirements of the bridge erecting machine are becoming more and more stringent. At present, the longitudinal dimension of the segmental assembly bridge erecting machine that meets the requirements is about greater than the distance between the two piers, so the distance between the two fulcrums of the bridge erecting machine is very large , under the premise of meeting the rigidity requirements, the section height of the bridge erecting machine increases, which not only increases the equipment cost and transportation difficulty, but also puts forward stricter requirements for the construction and the size of the bridge erecting machine. There are more and more demands for small-sized bridge-erecting machines, and it is imminent to develop small-sized cantilever-assembled bridge-erecting machines suitable for long-span bridges

Images