A magnetic levitation rail-holding type rail transit double-track track beam

Abstract

The invention discloses a two-line rail girder of maglev rail-holding rail transit. The rail girder comprises a left box girder and a right box girder which are erected on a bridge pier, wherein the structure of the left box girder is the same with that of the right box girder, the left box girder is mounted on the bridge pier through a left support, the right box girder is mounted on the bridge pier through a right support, and the structure of the left support is the same with that of the right support; the right side of the left box girder is fixedly connected with the left side of the right box girder through a cross beam, and the cross section of the cross beam is in an inverted T shape; the cross beam is arranged right above the bridge pier and spaced from the bridge pier. The left and right box girders are connected through the cross beam, the overall rigidity is greatly increased, the rail girder is 3 times the rigidity when left and right single girders are arranged separately, the structural rigidity is increased, the deformation during structural stress is greatly reduced correspondingly, and the strict requirement of the maglev engineering for structural deformation is met.

Description

technical field [0001] The invention belongs to the field of track beams, and more specifically relates to a rail-holding double-track track beam for rail traffic. Background technique [0002] Rail-hugging rail transit mainly includes maglev rail transit and straddle monorail transit, both of which adopt a unique rail-hugging operation mode. The small-section single-track box girder that meets the vehicle limit is the most economical girder scheme for rail-hugging rail transit. [0003] refer to figure 1 , the two box girders of the traditional small-section two-line track are set independently of each other, which makes the lateral stiffness of the two-line track poor; in addition, each box girder is supported by two supports, which are set on the pier. The large lateral distance between the two supports results in a larger lateral width of the pier top cap, which increases the size of the pier top cap and the substructure at the bottom of the pier, increases the volume o...

AI Technical Summary

Problems solved by technology

[0003] refer to figure 1 , the two box girders of the traditional small-section two-line track are set independently of each other, which makes the lateral stiffness of the two-line track poor; in addition, each box girder is supported by two supports, which are set on the pier. The large lateral distance between the two supports results in a larger lateral width of the pier top cap, which increases the size of the pier top cap and the substructure at the bottom of the pier, increases the volume of the pier by about 35%, and greatly increases the pier’s capacity. Manufacturing costs, but also make the pier unsightly

[0004] Referring to Fig. 2(a) and Fig. 2(b), the Chinese patent application number 201410487247.0 discloses a straddle-type single-track double-box rectangular steel-concrete combined track beam structure, including: two lines of steel-concrete parallel to each other Concrete track main girders, two steel-concrete track main girders are connected by lower beams and lower horizontal longitudinal connections; wherein, the steel-concrete track main girders include: a box-shaped steel beam structure and a cross-section It is a rectangular concrete cuboid structure, the concrete cuboid structure is located above the steel beam structure, and is connected with the steel beam structure by shear nails; Increase the lateral stiffness, but the beams it uses are truss structures. Although the beams of this truss structure can increase the lateral stiffness, they are not suitable for application on special bridge structures such as maglev track beams, except for their high cost. In addition, the steel truss structure is easily affected by thermal expansion and contraction, which has a great impact on the flatness control of the magnetic levitation track beam, which is not conducive to the smooth running of the magnetic levitation train. At the same time, the complex truss structure is poor in aesthetics and does not conform to The requirements of modern urban traffic development

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