Highway and railway same-floor eccentric-load placed cable-stayed bridge with main girder running through bridge towers

Abstract

The invention discloses a highway and railway same-floor eccentric-load placed cable-stayed bridge with a main girder running through bridge towers. The highway and railway same-floor eccentric-load placed cable-stayed bridge with the main girder running through the bridge towers comprises the main girder, multiple bridge towers and multiple stay cables, wherein the multiple bridge towers are placed along the main girder in the bridge direction; the multiple stay cables are used for connecting the bridge towers with the two sides, in the bridge direction, of the main girder; the main girder comprises a horizontal and horizontal lattice girder for placing a first highway; a first steel box boundary girder for placing a railway and a second steel box boundary girder for placing a second highway are correspondingly arranged on the two sides of the transverse bridge direction of the horizontal and horizontal lattice girder; and the horizontal and horizontal lattice girder is spliced with the first steel box boundary girder and the second steel box boundary girder through bolts. As the main girder adopts an asymmetrical placing form, the highway and railway same-floor eccentric-load placed cable-stayed bridge with the main girder running through the bridge towers has the advantages that the line elevation is small when being compared with the line elevation of layered arrangement, the highway and railway wiring condition of the is improved when being compared with the highway and railway wiring condition of same-floor symmetric arrangement, the space and ramp arrangement are saved, engineering investment can be saved, and the view is wide.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering technology, and in particular relates to a cable-stayed bridge in which a main girder is passed through a pylon with road and railway same-layer eccentric load arrangement. Background technique [0002] At present, most of the cable-stayed bridges built in combination with highways and railways in China adopt a layered bridge deck layout. For example, the Chinese utility model patent with the application number 201720395421.8 discloses a bridge layout structure built with highways and railways, including the main girder of the highway. A plurality of bridge piers are arranged at intervals along the extension direction of the highway main beam at the central divider of the highway main beam, and a track for the passage of rail transit vehicles is erected above the bridge piers. The bridge layout structure of the above-mentioned public-rail joint construction uses the idle space in the ce...

AI Technical Summary

Problems solved by technology

In the above scheme, using the cross-sectional structure of the main beam, the stay cables are connected to both sides of the railway main beam instead of the two sides of the entire road-rail main beam, which reduces the bending moment of the main beam, but in order to improve the torsional rigidity and the Wind performance increases the width of the bridge deck, the lateral force is large, the requirements for structural stability are high, and the utilization rate of materials is not high

In addition, in the above scheme, the railway load is placed in the middle, and the road load is distributed on both sides of the same layer in a symmetrical arrangement. At the bridgehead, the road and railway connections will intersect. The connection is complicated, requiring a large space site, and the space utilization rate is low.

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