Rear plate type steel-concrete combined section with semi-open grid chamber

Abstract

The invention discloses a rear plate type steel-concrete combined section with a semi-open grid chamber. The rear plate type steel-concrete combined section with the semi-open grid chamber comprises asteel-concrete combined area. The steel-concrete combined area comprises combined-section peripheral steel plates, steel-grid-chamber force transfer partition plates in the bridge direction are arranged on the inner sides of the combined-section peripheral steel plates, and rear pressure-bearing steel plates in the transverse direction of a bridge are further arranged on the inner sides of the combined-section peripheral steel plates. Grid-chamber inner side plates are arranged at the ends of the steel-grid-chamber force transfer partition plates and the rear pressure-bearing steel plates, asteel grid chamber is defined by the combined-section peripheral steel plates, the steel grid chamber force transfer partition plates, the rear pressure-bearing steel plates and the grid-chamber innerside plates, and concrete is poured in the steel grid chamber. The length of a closed section of the combined-section grid chamber is greatly reduced, the overall arrangement is simpler, the open space is enlarged, the grid-chamber inner side plates are obliquely arranged, and construction operation of workers is facilitated. The length of the combined section is greatly reduced compared with that of a front and rear plate type combined section, the local rigidity of a main beam is prevented from being too high, stress and deformation of the main beam are more uniform, the grid-chamber innerside plates are obliquely arranged, concrete pouring compaction is facilitated, and the engineering quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of bridge joint sections, and in particular relates to a steel-concrete joint section with a rear panel of a semi-open cell. Background technique [0002] At present, the commonly used form of joint section of hybrid girders of highway and railway bridges is the prestressed rear slab or the prestressed front and rear slab. [0003] The prestressed back-slab joint section usually adopts the rear pressure-bearing plate and the steel cell opening on one side along the direction of the concrete beam to transmit force. The bottom plate of the cell on the upper edge of the main beam or the roof of the cell on the lower edge of the main beam are arranged horizontally, and corner gaps are likely to exist when pouring concrete , increasing the workload of construction inspection and grouting, and the horizontally arranged plates are inconvenient for workers to carry out construction welding and steel bar layout opera...

AI Technical Summary

Problems solved by technology

[0003] The prestressed back-slab joint section usually adopts the rear pressure-bearing plate and the steel cell opening on one side along the direction of the concrete beam to transmit force. The bottom plate of the cell on the upper edge of the main beam or the roof of the cell on the lower edge of the main beam are arranged horizontally, and corner gaps are likely to exist when pouring concrete , increasing the workload of construction inspection and grouting, and the horizontally arranged plates are inconvenient for workers to carry out construction welding and steel bar layout operations; the diaphragm in the joint area is set at the side end of the concrete beam, which cannot fully exert the circumferential support for the joint section effect

[0004] The front and rear pressure plates and the front and rear steel cells are usually used for force transmission in the prestressed front and rear plate joint sections. Concrete pouring is carried out in the structural hole, the length of the joint section is relatively long, the structure is complex, and the local rigidity of the main girder is very large; and the steel grid is narrow, the construction on site is difficult, and the quality of the project is difficult to guarantee

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