Construction method of high-speed railway platform beam structure

Abstract

The invention discloses a construction method of a high-speed railway platform beam structure. The construction method comprises the following steps that a single-track pier and a double-track pier are built; a temporary support, a formwork and beam section steel bars of the cast-in-place platform beam are built, so that the beam section steel bars are erected on one single-track pier and one double-track pier respectively; the beam section reinforcing steel bars are cast in situ to form the platform beam body, flange plate reinforcing steel bars used for forming flange plates through casting are exposed to the external environment, and then the flange plate reinforcing steel bars are curled to be bent towards one side of the platform beam body to form a bridge girder erection machine avoiding position; the bridge girder erection machine reciprocates at the bridge girder erection machine avoiding position so as to erect the prefabricated single-track girder on the single-track pier, and the prefabricated double-track girder is erected on the double-track pier; and the flange plate reinforcing steel bars are cast in place to form the flange plate. The platform beam structure parallel construction and line production are combined, the construction period is shortened, and the construction cost is saved.

Description

technical field [0001] The invention belongs to the technical field of platform beam structures of high-speed railways, and more specifically relates to a construction method of platform beam structures of high-speed railways. Background technique [0002] With the rapid establishment and development of my country's transportation hubs, as a means of transportation, the construction cost and efficiency of railways are crucial to the effective operation of transportation, and they are the link connecting various regions in the country. [0003] At present, due to the influence of external factors such as terrain, the track generally needs to be built on the viaduct to reduce the impact on the existing planning. If the transportation vehicles with platforms are built on the viaduct, the platform needs to be configured to facilitate people getting on and off The platform beam structure, the lateral span of the platform beam structure increases, will include at least one platfor...

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Problems solved by technology

[0003] At present, due to the influence of external factors such as terrain, the track generally needs to be built on the viaduct to reduce the impact on the existing planning. If the transportation vehicles with platforms are built on the viaduct, the platform needs to be configured to facilitate people getting on and off The platform beam structure, the lateral span of the platform beam structure increases, will include at least one platform beam, single-line beam, and double-line beam, because the flange plate of the platform beam will extend to the top of the single-line beam and double-line beam, resulting in The bridge erecting machine will be interfered by the flange plate when building the single-line girder or the double-line girder. Therefore, in the prior art, the construction sequence of the platform girder structure is to build the single-line girder and the double-line girder first, and then wait for the single-line girder and the double-line girder to be successfully built. Finally, the construction of platform beams (such as support, formwork, on-site pouring, etc.) is carried out on the basis of single-line beams and double-line beams. Since the single-line beams, double-line beams and platform beams cannot be constructed simultaneously, the combination of parallel construction and flow operation cannot be realized. The construction of the platform beam structure is carried out in the same way, which leads to a long construction period of the platform beam structure and complex construction support structure, high construction cost and unbalanced production. What's more, the time interval between the platform beam and the single-line beam and double-line beam is too long. , which is not conducive to the firmness and reliability of the connection between the platform girder and the bridge pier

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