Fabricated railway tubular beam

Abstract

The invention relates to the technical field of bridge engineering, in particular to a fabricated railway tubular beam. The fabricated high-speed railway tubular beam comprises a tubular beam main body, wherein a train channel used for erecting a railway is arranged inside the tubular beam main body, the tubular beam main body is mainly formed through sequential butt joint of a plurality of ultra-high performance concrete prefabricated section units, on the butt joint parts of every two adjacent prefabricated section units, at least one butt joint surface of one prefabricated section unit is provided with a shear key, and the other butt joint surface is provided with a groove matched with the shear key, so that the prefabricated section unit is matched with the other prefabricated sectionunits. By arranging the fabricated railway tubular beam, the building height is reduced, the tubular beam structure is lighter, factory prefabrication is facilitated, and construction is facilitated.The tubular beam adopts a fabricated structure, so that a bridge structure is independently formed into an individual, a high-quality bridge structure prefabricated section for the single section canbe obtained under the good manufacturing condition of a factory, and then the prefabricated section units are formed.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to an assembled railway pipe beam. Background technique [0002] At present, my country's high-speed railways have high operating density, long operating mileage, and fast operating speed, and have high requirements for safety and comfort. In order to ensure the high reliability, high stability and high smoothness requirements of the high-speed railway line, the bridge structure is usually used to construct the line, and the bridge accounts for more than 60% or even as high as 94.0% of the total length of the main line. However, at present, my country's high-speed railway bridges are basically small and medium-span prestressed concrete simply supported box girder bridges or continuous box girder bridges, and the standard span of commonly used simply supported girder bridges is 32m. However, under the condition of a large number of small and medium-span bridges, the line ...

AI Technical Summary

Problems solved by technology

However, under the condition of a large number of small and medium-span bridges, the line smoothness index is more sensitive to the uneven settlement of the foundation; it is limited by material and structural characteristics, material and structural factors (shrinkage creep, temperature stress, prestress loss, etc.) and environmental factors (freeze-thaw cycles and chloride ion erosion, etc.) all significantly affect the service performance of prestressed concrete girder bridges, significantly reducing driving comfort and even endangering driving safety.

Images