Beam-rail integrated structure suitable for medium-low traffic volume urban rail transit engineering

Abstract

The utility model discloses a beam-rail integrated structure suitable for urban rail transit engineering with medium and low traffic volume, the beam-rail integrated structure comprises a beam structure and a rail, the rail is fixed at the top end of the beam structure through a fastener, a bolt sleeve is pre-embedded at the top end of the beam structure, and the bolt sleeve is fixedly connected with the beam structure. The fastener is fixed to the top end of the beam structure through cooperation between a bolt and the bolt sleeve, and a reinforcing steel bar net is arranged in the beam structure and located under the fastener. The utility model has the advantages that compared with the traditional structural form of'rail, rail bearing platform and beam ', the integral design of'rail bearing platform and beam' greatly reduces the overall structural height, saves the engineering investment, reduces the social influence, can better respond to the national low-carbon and energy-saving requirements, and provides technical support for popularizing urban rail transit engineering with medium and low traffic volume.

Description

Technical Field

[0001] This utility model relates to the technical field of rail transit, and in particular to an integrated beam-rail structure suitable for medium- and low-capacity urban rail transit projects. Background Technology

[0002] For the construction and reconstruction of bridges in urban rail transit projects with medium and low capacity, especially for the reconstruction of bridges with medium and small spans, the bridge deck elevation and beam bottom elevation must be maintained as they were. However, the existing beam structure is low in height, and it is almost impossible to achieve the above-mentioned structural height range according to the traditional "track + track support + beam" structural type.

[0003] Therefore, there is a need for an integrated beam-rail structure suitable for medium- and low-capacity urban rail transit projects that can solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an integrated beam-track structure suitable for medium- and low-capacity urban rail transit projects. By optimizing the beam cross-sectional shape and integrating the "track support platform + beam" design, the traditional "track + track support platform + beam" structure is optimized into a "track + beam" structure. This significantly reduces the structural height of the traditional "track + track support platform + beam" structure, allowing medium- and small-span bridges to accommodate medium- and low-capacity urban rail transit by simply replacing a portion of the beams. This avoids large-scale reconstruction of existing roads and bridges, reduces traffic management pressure during construction, minimizes the relocation of numerous pipelines, and saves on project investment.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An integrated beam-track structure suitable for medium- and low-capacity urban rail transit projects is provided. The integrated beam-track structure includes a beam structure and a track. The track is fixed to the top of the beam structure by fasteners. Bolt sleeves are pre-embedded at the top of the beam structure. The fasteners are fixed to the top of the beam structure by the cooperation between the bolts and the bolt sleeves. A reinforcing steel mesh is provided inside the beam structure and the reinforcing steel mesh is located directly below the fasteners.

[0007] The beam structure has several prestressed ducts arranged inside it. The prestressed ducts are arranged transversely along the beam structure and located below the bolt sleeve. The ends of the prestressed ducts are provided with prestressed anchor spiral bars.

[0008] The bottom end of the bolt sleeve passes through the reinforcing steel mesh and extends below the reinforcing steel mesh.

[0009] The beam structure is arranged in two sets opposite each other, and pipelines are provided on both sides of the transverse direction of each set of beam structures.

[0010] The advantages of this utility model are:

[0011] 1. Compared with the traditional "track + rail support platform + beam" structure, the integrated design of "rail support platform + beam" greatly reduces the overall structural height, saves project investment, reduces social impact, and can better respond to the national requirements for low carbon and energy conservation, providing technical support for the promotion of medium and low capacity urban rail transit projects;

[0012] 2. The design adopts an integrated "rail support platform + beam" structure. The beam structure not only serves as a load-bearing component for the upper load, but also acts as a "rail support platform" in the track system. This saves the weight of the "rail support platform", reduces the load on the existing substructure, and reduces the amount of reinforcement work required for the existing substructure.

[0013] 3. In terms of construction quality, the "beam-rail integrated" structure, where the "rail support platform" is also the "beam" and is erected using a prefabrication method, is more reliable in quality than the traditional cast-in-place "rail support platform".

[0014] 4. In terms of construction period, the process of pouring the "rail support platform" is eliminated, and the total construction period is also shorter. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall beam-rail integrated structure of this utility model;

[0016] Figure 2 This is a cross-sectional view (I) of the integrated beam-rail structure of this utility model;

[0017] Figure 3 This is a cross-sectional view (II) of the integrated beam-rail structure of this utility model;

[0018] Figure 4 A cross-sectional view of a bridge in the prior art (I);

[0019] Figure 5 A cross-sectional view of a bridge in the prior art (II);

[0020] like Figures 1-5 As shown in the figure, the markings represent:

[0021] 1. Beam structure; 2. Track; 3. Fastener; 4. Bolt sleeve; 5. Bolt; 6. Reinforcing steel mesh; 7. Prestressed anchor spiral reinforcement; 8. Prestressed duct; 9. Integrated beam-rail structure; 10. Rail support platform; 11. Detailed Implementation

[0022] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0023] like Figures 4-5As shown, in the prior art, the bridge consists of a beam structure 1, a track 2 and a track support platform 11. The track support platform 11 is located on the top of the beam structure 1, and the track 2 is fixed to the track support platform 11 by fasteners 3.

[0024] Example: Figures 1-3 As shown, this embodiment relates to an integrated beam-track structure suitable for medium- and low-capacity urban rail transit projects. The integrated beam-track structure 10 mainly includes a beam structure 1 and a track 2. The track 2 is fixed to the top of the beam structure 1 by fasteners 3. Bolt sleeves 4 are pre-embedded at the top of the beam structure 1. Fasteners 3 are fixed to the top of the beam structure 1 through the cooperation between bolts 5 and bolt sleeves 4. A reinforcing steel mesh 6 is provided inside the beam structure 1, located directly below the fasteners 3. The bottom end of the bolt sleeves 4 passes through the reinforcing steel mesh 6 and extends below it. The reinforcing steel mesh 6 is provided because eliminating the rail support platform reduces the load distribution width of the rail transit vehicles; the reinforcing steel mesh 6 is used to reinforce this reduction.

[0025] like Figures 1-3 As shown, several prestressed ducts 8 are arranged inside the beam structure 1. These prestressed ducts 8 are arranged transversely along the beam structure 1 and located below the bolt sleeves 4. Prestressed anchor spiral reinforcement 7 is installed at the ends of the prestressed ducts 8. When installing the prestressed ducts 8 and prestressed anchor spiral reinforcement 7, sufficient space must be reserved for the bolt sleeves 4 while ensuring the strength and stiffness of the beam structure 1. Furthermore, two sets of beam structures 1 are arranged opposite each other, with pipelines 9 installed on both transverse sides of each set. The integrated beam-rail structure 10 effectively reduces the relocation of the pipelines 9.

[0026] The beneficial technical effects of this embodiment are as follows:

[0027] 1. Compared with the traditional "track + rail support platform + beam" structure, the integrated design of "rail support platform + beam" greatly reduces the overall structural height, saves project investment, reduces social impact, and can better respond to the national requirements for low carbon and energy conservation, providing technical support for the promotion of medium and low capacity urban rail transit projects;

[0028] 2. The design adopts an integrated "rail support platform + beam" structure. The beam structure not only serves as a load-bearing component for the upper load, but also acts as a "rail support platform" in the track system. This saves the weight of the "rail support platform", reduces the load on the existing substructure, and reduces the amount of reinforcement work required for the existing substructure.

[0029] 3. In terms of construction quality, the "beam-rail integrated" structure, where the "rail support platform" is also the "beam" and is erected using a prefabrication method, is more reliable in quality than the traditional cast-in-place "rail support platform".

[0030] 4. In terms of construction period, the process of pouring the "rail support platform" is eliminated, and the total construction period is also shorter.

[0031] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A beam-rail integrated structure suitable for medium- and low-capacity urban rail transit projects, characterized in that: The beam-rail integrated structure includes a beam structure and a rail. The rail is fixed to the top of the beam structure by fasteners. A bolt sleeve is pre-embedded at the top of the beam structure. The fasteners are fixed to the top of the beam structure by the cooperation between the bolts and the bolt sleeves. A reinforcing steel mesh is provided inside the beam structure and the reinforcing steel mesh is located directly below the fasteners.

2. The beam-rail integrated structure suitable for medium- and low-capacity urban rail transit projects as described in claim 1, characterized in that: The beam structure has several prestressed ducts arranged inside it. The prestressed ducts are arranged transversely along the beam structure and located below the bolt sleeve. The ends of the prestressed ducts are provided with prestressed anchor spiral bars.

3. The beam-rail integrated structure suitable for medium- and low-capacity urban rail transit projects as described in claim 1, characterized in that: The bottom end of the bolt sleeve passes through the reinforcing steel mesh and extends below the reinforcing steel mesh.

4. The beam-rail integrated structure suitable for medium- and low-capacity urban rail transit projects as described in claim 1, characterized in that: The beam structure is arranged in two sets opposite each other, and pipelines are provided on both sides of the transverse direction of each set of beam structures.

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