Superposed beam cable-stayed bridge deck crane method applied in mountainous area

Abstract

The invention discloses a superposed beam cable-stayed bridge deck crane method applied in a mountainous area. The method comprises the steps that a bridge deck steel girder preassembly field is arranged on a steel girder 0# section, a steel girder 1# section and a steel girder 2# segment, and steel girder parts are transported to the bridge deck steel girder preassembly field; the steel girder parts are preassembled into a complete section through a gantry crane, the complete section is transported to a girder front end through a rail girder transportation flat car, and the steel girder standard section is installed through integral lifting and rotating of a cantilever crane. Preassembly and integral installation operation is completed on the midspan side and the side span sides separately, no interference is generated, and by means of the bridge deck steel girder integral installation method, not only are the problems of construction safety, quality and progress solved, but also the interference problem of auxiliary piers on integral installation is solved. According to the construction method, the construction period is expected to be shortened by 2 days on the basis of the prior art, the efficiency is high, the construction cost is reduced, a little project quantity is needed, construction is safe, and the construction quality is high.

Description

technical field [0001] The invention relates to a bridge deck crane method, in particular to a bridge deck crane method for a composite girder cable-stayed bridge in a mountainous area. Background technique [0002] With the development of my country's transportation construction, more and more long-span steel structure cable-stayed bridges have appeared. Because of their large spanning capacity and beautiful appearance, cable-stayed bridges have developed rapidly this year, and the construction of bridge deck cranes is a large The steel main girder construction of span cable-stayed bridges is a very common construction method, especially in the span construction in mountainous areas. Due to the narrow space near the main tower, it can only be used as a material stacking site, and it is difficult to provide a better pre-assembly site. At the same time, since the height of parts transportation and cantilever assembly operation reaches hundreds of meters or even higher, the pre...

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Problems solved by technology

[0002] With the development of my country's transportation construction, more and more long-span steel structure cable-stayed bridges have appeared. Because of their large spanning capacity and beautiful appearance, cable-stayed bridges have developed rapidly this year, and the construction of bridge deck cranes is a large The steel main girder construction of span cable-stayed bridge is a very common construction method, especially in the span construction in mountainous areas. Due to the narrow space near the main tower, it can only be used as a material stacking site, and it is difficult to provide a better pre-assembly site.

At the same time, due to the height of component transportation and cantilever assembly operations reaching hundreds of meters or even higher, the pre-assembly operation under the tower is more dangerous

Moreover, the erection height is high, the construction is difficult, and there are also problems of safety protection and huge cost investment. For the steel girder of a long-span cable-stayed bridge, the cantilever erection method of the bridge deck crane is used. The steel girder components are hoisted to the bridge deck at the stacking site, and each steel component cantilever is assembled into a whole segment one by one. This construction method has a long construction period, low efficiency, high cost, cumbersome and difficult procedures, and the construction project Large amount, high security risk

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