Slipping slot type cross transfer device and method for assisting hoisting of large-size box girder

Abstract

The invention discloses a slipping slot type cross transfer device for assisting hoisting of a large-size box girder, which comprises two parallel cross transfer tracks, two supporting devices, two slipping slot type cross transfer girders, two pushing type lifting jacks and a lifting jack pump station, wherein the two slipping slot type cross transfer girders are respectively assembled on the two cross transfer tracks, the slipping slot type cross transfer girders and the cross transfer tracks are matched by slide slots / guide rails, and the matched positions are provided with pin holes at equal intervals and fixed by pin shafts; the two supporting devices are spanned on the two cross transfer girders and positioned on both sides of the two slipping slot type cross transfer girders; the two lifting jacks are connected with the other side of one of the supporting devices; each supporting device comprises a slipping base spanned on the two cross transfer tracks, longitudinal supporting girders are fixedly arranged on the slipping bases and arranged in parallel; and the top of the slipping slot type cross transfer device is provided with a fixed structure for stopping the movement of a transportation truck. The slipping slot type cross transfer device solves the cross transfer problem of large-size prefabricated box girders, and reduces the construction cost of girder installation engineering by about 5%-10%.

Description

technical field [0001] The invention relates to a beam traversing device, in particular to a traversing device and a traversing method for hoisting a large box girder. Background technique [0002] At present, the structural form of simply supported and then continuous prefabricated box girders in municipal and highway bridges has been widely used. Although there are many erection schemes for prefabricated box girders, each scheme has its own limitations and its scope of application is small. [0003] With the rapid development of municipal and highway projects, prefabricated small box girders (generally 20-40 meters in length and 60-160 tons in weight) with simple support and then continuous structure are more and more widely used in medium-span bridges. The prefabricated box girder realizes the parallel construction with the substructure, which can greatly shorten the construction period, so it is welcomed by the construction unit. However, the prefabrication of the box g...

AI Technical Summary

Problems solved by technology

By using the sliding trough type traversing track, the problem of traversing the large prefabricated box girder is solved; the gantry crane equipment can be directly applied to the construction of beams on land with good terrain, and can be extended to the construction of gantry cranes across piers in complex terrain environments , the cross-pier gantry crane is used in conjunction with the traversing track, and it can also be applied to the transportation of prefabricated box girders with large curve radius, which greatly facilitates the construction, forms a set of reasonable erection schemes, and can reduce the cost of the upper beam project About 5~10%

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