Abstract
Prestress concrete channel beam bridge is a new structure suitable for railway bridges. Due to its advantages under stress, construction and economy, channel beam has been widely used and developed rapidly in engineering construction. However, the concrete track bed plate of channel beam bridge has the characteristics of large transverse width and weight, the stress of inclined wall box girder, complicated construction process, difficult control of concrete crack, and high construction technical difficulty. Therefore, it is necessary to study the wide channel beam bridge. This paper carries out safety checking calculation on the support structure of Bailey beams of channel beam bridge. The results showed that the supporting structure can be considered to be safe. The relevant structural safety design can provide reference to similar projects.
Highlights
Prestress concrete channel beam bridge is a new structure suitable for highway bridges, railway bridges and urban rail transit
According to the main beam web form, channel beam can be divided into two categories: straight wall type and inclined wall type
By tilting the upper flange to the outside, the main beam spacing of slotted beam of inclined wall type is smaller than that of straight wall slotted beam, which reduces the transverse span of track bed plate [4]
Summary
Prestress concrete channel beam bridge is a new structure suitable for highway bridges, railway bridges and urban rail transit. Compare with the conventional t-beam bridge and box girder bridge, the channel beam can significantly reduce the height of the superstructure, increase the clearance under the bridge, reduce the height of the embankment, block the traffic noise and prevent the overturning of vehicles. It has the characteristics of beautiful shape, convenient maintenance and good anti-seismic performance [1]. The concrete track bed plate of channel beam bridge has the characteristics of large transverse width and weight, the stress of inclined wall box girder, complicated construction process, difficult control of concrete crack, and high construction technical difficulty [5]. The safety analysis of the support structure is carried out based on the finite element model, and the conclusion can provide reference for similar engineering applications
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