Precast concrete sidewalk structure of railway simply-supported T beam
By pre-embedding of steel in the precast concrete sidewalk structure of the railway simply supported T-beam and connecting it with connecting steel plates and bolts, the problems of high construction difficulty and difficult to guarantee project quality in the existing technology are solved, and higher construction accuracy and engineering are achieved quality.
Patent Information
- Application Number
- CN202421140689.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-23
AI Technical Summary
The overall bridge deck form of the existing railway simply supported T-beam and cast-in-place concrete sidewalk structure make it difficult to ensure construction quality.
The precast concrete sidewalk structure is adopted, and the precise alignment and connection between the precast block and the precast beam is achieved by prefabricating the steel in the prefabricated block and the prefabricated beam by connecting the connecting steel plate and bolts, combined with wet joint technology.
It improves the accuracy of beam formation, reduces construction difficulty, ensures the stability of project quality, reduces the amount of cast-in-place concrete, and improves construction efficiency.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridges, in particular to a prefabricated concrete sidewalk structure of a railway simply supported T-beam. Background Art
[0002] Most of the existing simply supported T-beams on railways adopt the form of an integral bridge deck, and the sidewalks on both sides adopt cast-in-place bridge decks. The amount of cast-in-place concrete at the bridge site is large, and a bundle of transverse prestressed tendons is set every 1m on the bridge deck. The number is large, and it is difficult to align the transverse prestressed channels reserved for each precast beam, and the accuracy of the beam erection is high. Therefore, the construction is difficult and the project quality is not easy to guarantee. Utility Model Content
[0003] The purpose of the utility model is to provide a prefabricated concrete sidewalk structure of a railway simply supported T-beam to solve the above problems. In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0004] The present application provides a precast concrete sidewalk structure of a railway simply supported T-beam, comprising: a plurality of precast blocks and a plurality of precast beams; each of the precast blocks is provided with an embedded steel section, and the embedded steel section is perpendicular to the center line of the bridge deck; the flanges of the plurality of precast beams are connected by a second wet joint, and the precast blocks are located on both sides of the plurality of precast beams, and are connected to the flanges of the precast beams by a first wet joint; the flanges of the precast beams connected to the precast blocks are provided with embedded steel sections, and the embedded steel sections inside the precast blocks correspond to the embedded steel sections inside the flanges of the precast beams and are connected by connecting steel plates and bolts; the connecting steel plates are arranged in the first wet joints.
[0005] Furthermore, the prefabricated block includes embedded parts, a foundation, a vertical wall and embedded steel sections; the foundation is located at and connected to the upper surface of the prefabricated block at one end away from the center line of the bridge deck, and embedded parts for installing sound barriers or railings are arranged at equal intervals inside the foundation; embedded steel sections are arranged at equal intervals inside the prefabricated block, and each embedded steel section is located under a corresponding embedded part; the upper surface of the prefabricated block at one end close to the center line of the bridge deck is connected to the vertical wall, and a groove is formed between the foundation and the vertical wall.
[0006] Furthermore, a ballast retaining wall is provided on the upper surface of the first wet joint, and a groove is formed between the ballast retaining wall and the vertical wall.
[0007] Furthermore, the upper surfaces of the opposite sides of the groove are paved with sidewalk covers.
[0008] Furthermore, reserved holes are provided at equal intervals inside the prefabricated block, the reserved holes are located on both sides of the embedded steel and are parallel to the embedded steel, and transverse prestressed steel strands of the bridge deck are installed inside the reserved holes.
[0009] Furthermore, a transverse prestressed steel bundle of the bridge deck is provided inside the bridge deck of the prefabricated beam, and the transverse prestressed steel bundle of the bridge deck inside the bridge deck corresponds to the transverse prestressed steel bundle of the bridge deck inside the reserved hole and is connected to each other.
[0010] Furthermore, the outgoing end of the prefabricated beam connecting the prefabricated block is configured to be in a step shape.
[0011] Furthermore, transverse partitions are provided between the beam ribs of the plurality of prefabricated beams, and the transverse partitions are connected by second wet joints.
[0012] Furthermore, transverse prestressed steel strands of the diaphragm are tensioned between the diaphragm below the flange and above the base.
[0013] Furthermore, the embedded steel and the connecting steel plate are welded into an integrated structure.
[0014] The beneficial effects of the utility model are:
[0015] The utility model embeds steel sections in the prefabricated blocks and the prefabricated beams respectively, connects the embedded steel sections with connecting steel plates and bolts, and casts wet joints at the connections after the bolts are connected, thereby solving the problems of high accuracy requirements for beam erection and great construction difficulty.
[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the embodiments of the utility model. The purpose and other advantages of the utility model can be achieved and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 This is the layout diagram of the single-line beam of the utility model;
[0019] Figure 2 This is the layout diagram of the double single-line beam of the utility model;
[0020] Figure 3 It is a schematic diagram of the connection between the precast block and the precast beam;
[0021] Figure 4 It is a structural schematic diagram of the outgoing end of the precast beam;
[0022] Figure 5 It is a schematic cross-sectional view of the prefabricated block where no foundation is set;
[0023] Figure 6 A schematic cross-sectional view of the foundation for the precast block;
[0024] Figure 7 It is the right view of the prefabricated block;
[0025] Figure 8 This is the top view of the precast block.
[0026] Markings in the figure: 1. Precast block; 2. First wet joint; 3. Sidewalk cover; 4. Second wet joint; 5. Transverse prestressed steel strands of bridge deck; 6. Transverse prestressed steel strands of diaphragm; 7. Precast beam; 8. Sound barrier or railing; 9. Ballast retaining wall; 10. Embedded parts; 11. Embedded steel section; 12. Foundation; 13. Vertical wall; 14. Connecting steel plate; 15. Reserved hole; 16. Outgoing end of precast beam; 17. Bolt. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.
[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present utility model, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0029] This embodiment provides a precast concrete sidewalk structure of a railway simply supported T-beam, such as Figure 1-Figure 4 As shown, including:
[0030] A plurality of prefabricated blocks 1, each of which is provided with an embedded steel section 11, and the embedded steel section 11 is perpendicular to the center line of the bridge deck;
[0031] A plurality of prefabricated beams 7, the flanges of the plurality of prefabricated beams 7 are connected by a second wet joint 4, the prefabricated block 1 is located on both sides of the plurality of prefabricated beams 7, and is connected to the flanges of the prefabricated beams 7 by a first wet joint 2; an embedded steel 11 is provided inside the flange of the prefabricated beam 7 connected to the prefabricated block 1, the embedded steel 11 inside the prefabricated block 1 corresponds to the embedded steel 11 inside the flange of the prefabricated beam 7 and is connected by a connecting steel plate 14 with bolts 17; the connecting steel plate 14 is arranged in the first wet joint 2. The embedded steel 11 and the connecting steel plate 14 are welded into an integral structure. The bolt 17 is a high-strength bolt. The connecting steel plate 14 is provided with bolt holes, and the embedded steel 11 is easy to position through the connecting steel plate 14 and the bolt 17, which solves the problem of the difficulty of aligning the prefabricated block 1 with the prefabricated beam 7.
[0032] Figure 1 The single-line beam layout diagram of the present application includes two rows of precast blocks 1 and two rows of precast beams 7; Figure 2 This is the double-line beam layout diagram of the present application, including two rows of precast blocks 1 and four rows of precast beams 7.
[0033] like Figure 5 and Figure 6 As shown, the prefabricated block 1 includes embedded parts 10, a foundation 12, a vertical wall 13 and embedded steel 11; the foundation 12 is located on and connected to the upper surface of the prefabricated block 1 at one end away from the center line of the bridge deck, and embedded parts 10 for installing sound barriers or railings 8 are arranged at equal intervals inside the foundation 12; embedded steel 11 is arranged at equal intervals inside the prefabricated block 1, and each embedded steel 11 is correspondingly located under one embedded part 10; the upper surface of the end of the prefabricated block 1 close to the center line of the bridge deck is connected to the vertical wall 13, and a groove is formed between the foundation 12 and the vertical wall 13. The embedded parts 10 can be embedded bolts for installing sound barriers or railings 8.
[0034] A ballast retaining wall 9 is provided on the upper surface of the first wet joint 2 , and a groove is formed between the ballast retaining wall 9 and the vertical wall 13 .
[0035] The upper surfaces of the opposite sides of the groove formed between the foundation 12 and the vertical wall 13 and the groove formed between the ballast retaining wall 9 and the vertical wall 13 are paved with sidewalk covers 3, and the grooves are used for installing cables or for drainage.
[0036] like Figure 7 and Figure 8 As shown, the prefabricated block 1 is provided with reserved holes 15 at equal intervals, the reserved holes 15 are located on both sides of the embedded steel 11 and are parallel to the embedded steel 11 , and the transverse prestressed steel strands 5 of the bridge deck are installed inside the reserved holes 15 .
[0037] The bridge deck of the prefabricated beam 7 is provided with a bridge deck transverse prestressed steel bundle 5 inside the bridge deck. The bridge deck transverse prestressed steel bundle 5 inside the bridge deck corresponds to the bridge deck transverse prestressed steel bundle 5 inside the reserved hole 15 and is connected to each other. The bridge deck transverse prestressed steel bundle 5 is used to strengthen the integrity of the beam body.
[0038] A transverse diaphragm is provided between the beam ribs of the plurality of precast beams 7, and the transverse diaphragms are connected by a second wet joint 4. A transverse prestressed steel strand 6 of the transverse diaphragm is tensioned between the flange of the precast beam 7 and the base and the transverse diaphragm.
[0039] In this embodiment, the length of each prefabricated block 1 is 6m, a foundation 12 is set every 2m on each prefabricated block 1, three foundations 12 are evenly arranged on each prefabricated block 1, a bundle of bridge deck transverse prestressed steel bundles 5 is set every 1m, and each of the foundations 12 is located in the middle of two adjacent bundles of bridge deck transverse prestressed steel bundles 5.
[0040] like Figure 4 As shown, the precast beam outgoing end 16 of the precast beam 7 connecting the precast block 1 is set in a stepped shape. The stepped precast beam outgoing end 16 serves as a casting template for the first wet joint 2. When the first wet joint 2 is cast in situ, no casting template is required, thereby reducing construction costs.
[0041] The construction process of this utility model is:
[0042] Batch manufacture precast blocks 1 and precast beams 7 at the beam yard; transport and erect the precast beams 7 to the construction site; cast the second wet joint 4 between multiple precast beams 7; tension the transverse prestressed steel strands 6 of the diaphragm; complete the grouting and anchoring of the transverse prestressed steel strands 6 of the diaphragm; transport and erect the precast blocks 1 to the construction site; connect the precast blocks 1 and the embedded steel sections 11 of the precast beams 7 by connecting the steel plates 14 with the bolts 17; cast the ballast retaining wall 9 and the first wet joint 2 in situ; tension the transverse prestressed steel strands 5 of the bridge deck; complete the grouting and anchoring of the transverse prestressed steel strands 5 of the bridge deck; install the sidewalk cover 3; install the sound barrier or railing 8 on the embedded part 10.
[0043] The present application makes the embedded parts 10, foundation 12, vertical wall 13, embedded steel 11 and groove into a prefabricated block 1, which reduces the amount of cast-in-place concrete and speeds up the construction. The prefabricated beams 7 of the prefabricated blocks 1 are used for prefabricated assembly construction to achieve green construction, thereby improving the problems of the cumbersome construction of the original railway T-beam and the large amount of subsequent maintenance work.
[0044] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
[0045] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A precast concrete sidewalk structure of a railway simply supported T-beam, characterized in that: include: A plurality of prefabricated blocks (1), each of the prefabricated blocks (1) being provided with an embedded steel section (11) therein, the embedded steel section (11) being perpendicular to the center line of the bridge deck; A plurality of prefabricated beams (7), wherein the flanges of the plurality of prefabricated beams (7) are connected via a second wet joint (4); the prefabricated blocks (1) are located on both sides of the plurality of prefabricated beams (7) and are connected to the flanges of the prefabricated beams (7) via a first wet joint (2); an embedded steel section (11) is provided inside the flange of the prefabricated beam (7) connected to the prefabricated blocks (1); the embedded steel section (11) inside the prefabricated blocks (1) corresponds to the embedded steel section (11) inside the flange of the prefabricated beam (7) in position and is connected via a connecting steel plate (14) and bolts (17); the connecting steel plate (14) is provided inside the first wet joint (2).
2. The precast concrete sidewalk structure of the railway simply supported T-beam according to claim 1 is characterized in that: The prefabricated block (1) comprises embedded parts (10), a foundation (12), a vertical wall (13) and embedded steel sections (11); the foundation (12) is located on and connected to the upper surface of the prefabricated block (1) at one end away from the center line of the bridge deck, and embedded parts (10) for installing sound barriers or railings (8) are arranged at equal intervals inside the foundation (12); embedded steel sections (11) are arranged at equal intervals inside the prefabricated block (1), and each embedded steel section (11) is located below a corresponding embedded part (10); the upper surface of the end of the prefabricated block (1) close to the center line of the bridge deck is connected to the vertical wall (13), and a groove is formed between the foundation (12) and the vertical wall (13).
3. The precast concrete sidewalk structure of the railway simply supported T-beam according to claim 2 is characterized in that: A ballast retaining wall (9) is provided on the upper surface of the first wet joint (2), and a groove is formed between the ballast retaining wall (9) and the vertical wall (13).
4. The precast concrete sidewalk structure of the railway simply supported T-beam according to any one of claims 2 or 3, characterized in that: The upper surfaces of the opposite sides of the groove are paved with sidewalk covers (3).
5. The precast concrete sidewalk structure of the railway simply supported T-beam according to claim 1 is characterized in that: The prefabricated block (1) is provided with reserved holes (15) at equal intervals inside, the reserved holes (15) are located on both sides of the embedded steel section (11) and are parallel to the embedded steel section (11), and transverse prestressed steel strands (5) of the bridge deck are installed inside the reserved holes (15).
6. The precast concrete sidewalk structure of the railway simply supported T-beam according to claim 5, characterized in that: A transverse prestressed steel bundle (5) for the bridge deck is arranged inside the bridge deck of the prefabricated beam (7), and the transverse prestressed steel bundle (5) for the bridge deck inside the bridge deck corresponds to the transverse prestressed steel bundle (5) for the bridge deck inside the reserved hole (15) and is connected to each other.
7. The precast concrete sidewalk structure of the railway simply supported T-beam according to claim 1 is characterized in that: The prefabricated beam outgoing end (16) of the prefabricated beam (7) connected to the prefabricated block (1) is designed in a step shape.
8. The precast concrete sidewalk structure of the railway simply supported T-beam according to claim 1, characterized in that: Transverse partitions are provided between the beam ribs of the plurality of prefabricated beams (7), and the transverse partitions are connected via second wet joints (4).
9. The precast concrete sidewalk structure of the railway simply supported T-beam according to claim 8, characterized in that: A transverse prestressed steel strand (6) of the diaphragm is tensioned between the diaphragm below the flange and above the base.
10. The precast concrete sidewalk structure of railway simply supported T-beam according to claim 1, characterized in that: The embedded steel (11) and the connecting steel plate (14) are welded into an integrated structure.