Pedestrian bridge structure and construction method thereof

Abstract

A footbridge structure and a construction method thereof, comprising a plurality of fishbone frames spliced with each other, a bridge main body of the footbridge is formed by splicing the plurality of fishbone frames, the fishbone frame comprises a main beam and a cross beam, the cross beam is connected to both sides of the main beam, and the cross beam is symmetrically arranged about the central axis of the main beam, there is a height difference between the top of the main beam and the cross beam, and water is accumulated at the connection between the main beam and the cross beam, so that rust is prevented from occurring at the connection between the main beam and the cross beam, a bridge floor is laid on the fishbone frame, the top of the fishbone frame is wrapped by the bridge floor, that is, the bridge floor is laid on the upper end surface of the main beam and the cross beam, so that the liquid is stored on the bridge floor, the liquid is further prevented from contacting the main beam and the cross beam, and rust is prevented from occurring on the main beam and the cross beam, a bridge deck is arranged on the bridge floor, and guardrails are arranged on both sides of the bridge deck.

Description

Technical Field

[0001] This invention belongs to the field of pedestrian bridge technology, specifically relating to a pedestrian bridge structure and its construction method. Background Technology

[0002] Steel-concrete composite structures fully utilize the material properties of both steel and concrete, resulting in excellent load-bearing capacity and economical cost. Compared to concrete structures, they are lighter, easier to construct, and more adaptable to curves. Therefore, steel-concrete composite structures are widely used in short-span pedestrian bridges, primarily in the form of steel plate-concrete composite beams, steel box-concrete composite beams, and steel truss-concrete composite beams. However, the steel structure of short-span pedestrian bridges is prone to water and dust accumulation, leading to corrosion. Furthermore, these two types of structures have numerous welded joints, and the welds are susceptible to corrosion, resulting in significant post-construction anti-corrosion work and high maintenance costs. Summary of the Invention

[0003] To address the above shortcomings, the technical problem to be solved by this invention is to provide a pedestrian bridge structure and its construction method, which improves the waterproof performance of the pedestrian bridge structure.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A pedestrian bridge structure includes multiple interconnected fish skeletons. Each fish skeleton includes a main beam and a crossbeam. The crossbeams are fixed to the main beams, and there is a height difference between the top of the main beams and the upper end face of the crossbeams. A bridge deck base plate for covering the top of the fish skeleton is laid on the fish skeleton. A bridge deck panel is laid on the bridge deck base plate, and guardrails are provided on both sides of the bridge deck panel.

[0005] As a preferred embodiment of the present invention, the bottom of the crossbeam is inclined.

[0006] As a preferred embodiment of the present invention, the crossbeam includes a middle crossbeam and end crossbeams, the end crossbeams are arranged at both ends of the main beam, and a support member is provided at the bottom of the end crossbeams.

[0007] As a preferred embodiment of the present invention, the support member includes a support base and a support plate. The support base is fixed to the bottom of the end beam, and the support plate is arranged inside the end beam and located above the support base.

[0008] In a preferred embodiment of the present invention, the bridge deck bottom plate is fixedly connected to the fish skeleton by welding studs, with the welding studs extending into the bridge deck.

[0009] As a preferred embodiment of the present invention, a side baffle is provided on the outer end of the crossbeam to limit the bridge deck.

[0010] As a preferred embodiment of the present invention, a limiting structure is provided on the bottom plate of the bridge deck, and the limiting structure extends into the bridge deck panel.

[0011] As a preferred embodiment of the present invention, the limiting structure includes a connecting part and a tapered part, the tapered part being connected to the bottom plate of the bridge deck through the connecting part.

[0012] As a preferred embodiment of the present invention, the bridge deck bottom plate is provided with a first overlapping part and a second overlapping part on both sides, the first overlapping part is provided with an overlapping groove, and the second overlapping part is provided with an overlapping joint, the overlapping groove and the overlapping joint being adapted to each other.

[0013] The above-mentioned construction method for a pedestrian bridge structure includes the following steps: S1, Prefabricate the bridge deck slab, main beams, and crossbeams according to construction requirements; S2, transport the prefabricated components to the construction site, weld the prefabricated components to form a fish skeleton, and then hoist and weld the fish skeleton in sections; S3. After the fish skeleton is welded, the main body of the bridge is formed, and concrete is poured into the main beams at both ends of the main body of the bridge. S4, the bridge deck slab is laid on top of the crossbeam. Welding studs are driven into the overlapping part of the bridge deck slab and the crossbeam. The welding studs penetrate the bridge deck slab and are welded to the upper flange plate of the crossbeam. S5 involves laying and tying the reinforcing steel bars on the bridge deck slab, then pouring concrete to complete the bridge deck, and finally constructing the pavement layer and guardrails on the bridge deck.

[0014] The beneficial effects of the present invention are: (1) by setting a height difference between the top of the main beam and the upper end face of the crossbeam, the waterproof liquid is stored at the connection of the main beam and the crossbeam, thereby preventing corrosion at the connection of the main beam and the crossbeam.

[0015] (2) The top of the fish skeleton is wrapped by the bottom plate of the bridge deck to further prevent the liquid from contacting the main beam and crossbeam, thereby preventing the main beam and crossbeam from rusting. Attached Figure Description

[0016] Figure 1 This is a bottom view of the pedestrian bridge structure.

[0017] Figure 2 This is a cross-sectional view of the pedestrian bridge structure located at the central crossbeam.

[0018] Figure 3 This is a cross-sectional view of the pedestrian bridge structure at the end crossbeam.

[0019] Figure 4 This is a structural schematic diagram of the end beam.

[0020] Figure 5 This is a structural schematic diagram of the bridge deck's bottom slab.

[0021] Reference numerals: 1. Bridge deck bottom plate, 1-1. Connecting part, 1-2. Conical part, 1-3. First overlapping part, 1-4. Overlap groove, 1-5. Overlap joint, 1-6. L-shaped connecting part, 1-7. Limiting baffle, 1-8. Main beam, 2. Crossbeam, 3. Middle crossbeam, 3-1. End crossbeam, 3-2. Drainage trough, 3-3. Guide plate, 3-4. Bridge deck, 4. Guardrail, 5. Welding stud, 6. Side baffle, 7. Support, 8. Support seat, 8-1. Support plate, 8-2. Concrete, 9. Sealing plate, 10. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings.

[0023] A pedestrian bridge structure includes multiple interconnected fish-shaped frames, which are assembled to form the main body of the pedestrian bridge. The fish-shaped frames include a main beam 2 and crossbeams 3. Crossbeams 3 are connected to both sides of the main beam 2, and the crossbeams 3 are symmetrically arranged about the central axis of the main beam 2. There is a height difference between the top of the main beam 2 and the crossbeams 3 to allow liquid on the main beam 2 to flow downward along the outer wall of the main beam 2. The downward flowing liquid has a certain kinetic energy to prevent liquid from accumulating at the connection between the main beam 2 and the crossbeams 3, thereby preventing corrosion at the connection between the main beam 2 and the crossbeams 3. A bridge deck base plate 1 is laid on the fish-shaped frames, and the bridge deck base plate 1 covers the top of the fish-shaped frames. That is, the bridge deck base plate 1 is laid on the upper surface of the main beam 2 and the crossbeams 3, thereby collecting the liquid on the bridge deck base plate 1 and further preventing the liquid from contacting the main beam 2 and the crossbeams 3, thereby preventing corrosion of the main beam 2 and the crossbeams 3. A bridge deck 4 is provided on the bridge deck base plate 1, and guardrails 5 are provided on both sides of the bridge deck 4.

[0024] In this embodiment, the main beam 2 has a circular cross-section, and the top of the main beam 2 is higher than the top surface of the crossbeam 3. When there is liquid on the main beam 2, it will flow down the surface of the main beam 2 to the bottom of the main beam 2, thereby preventing the liquid from accumulating on the main beam 2 and preventing the main beam 2 from rusting.

[0025] In a preferred embodiment, the transverse cross-section of the crossbeam 3 is a right-angled trapezoidal structure. The upper end face of the crossbeam 3 is in a horizontal plane, and the bridge deck bottom plate 1 abuts against the upper end face of the crossbeam 3. This prevents liquid from accumulating on the upper end face of the crossbeam 3 and prevents corrosion of the upper end face of the crossbeam 3. The lower end face of the crossbeam is inclined relative to the upper end face of the crossbeam 3 to prevent liquid from accumulating at the bottom of the crossbeam 3. Preferably, the inclination angle between the upper end face and the lower end face of the crossbeam 3 is 10-15°.

[0026] The crossbeam 3 includes a middle crossbeam 3-1 and an end crossbeam 3-2. The middle crossbeam 3-1 and the end crossbeam 3-2 have the same structure. The crossbeams at both ends of the fish skeleton are the end crossbeams 3-2. That is, the end crossbeams 3-2 are arranged at both ends of the main beam 2. The crossbeam located between the two end crossbeams 3-2 is the middle crossbeam 3-1. A support member 8 is provided at the bottom of the end crossbeam 3-2 to support the fish skeleton, which facilitates installation or facilitates the subsequent installation of bridge piers at the lower end of the fish skeleton.

[0027] The crossbeam 3 has an I-shaped cross-section, including an upper end plate and a lower end plate. To further prevent liquid accumulation at the connection between the crossbeam 3 and the main beam 2, drainage grooves 3-3 are provided on the side walls of both the upper and lower end plates of the crossbeam 3. These drainage grooves 3-3 and the side walls of the main beam 2 form drainage channels, facilitating the discharge of liquid from the upper and lower end plates and preventing liquid accumulation on the crossbeam 3. Furthermore, a guide plate 3-4 is provided in the middle of the crossbeam 3. The guide plate 3-4 is inclined relative to the axis of the main beam 2, improving the connection strength between the crossbeam 3 and the main beam 2. Simultaneously, the guide plate 3-4 directs the liquid to the outside of the crossbeam 3, preventing liquid from the upper end plate of the crossbeam 3 from flowing onto the lower end plate.

[0028] The support member 8 includes a support base 8-1 and a support plate 8-2. The support base 8-1 is fixed to the bottom of the end beam 3-2, and the support plate 8-2 is arranged inside the end beam 3-2. That is, the support plate 8-2 is located between the upper end plate and the lower end plate of the end beam 3-2. Preferably, a drainage groove is also provided at the bottom of the support plate 8-2 to prevent liquid from accumulating at the support plate 8-2. The support plate 8-2 is located above the support base 8-1 to prevent the end beam 3-2 from deforming at the position corresponding to the support base 8-1.

[0029] The bridge deck bottom plate 1 is fixedly connected to the crossbeam 3 or main beam 2 of the fish skeleton by welding studs 6. The welding studs 6 extend into the bridge deck 4 to increase the connection strength between the bridge deck 4 and the fish skeleton.

[0030] A side baffle 7 is provided on the outer end of the crossbeam 3. Preferably, the side baffle 7 is connected to the middle crossbeam 3-1 and the end crossbeam 3-2 respectively, and the side baffle 7 abuts against the bottom plate of the bridge deck 1. The side baffle 7 limits the bridge deck 4, which facilitates the in-situ casting of the bridge deck 4.

[0031] To further improve the overall integrity of the pedestrian bridge structure, a limiting structure is provided on the bridge deck base plate 1. The limiting structure extends into the bridge deck 4. In this embodiment, to facilitate the processing of the limiting structure, it is formed by bending the bridge deck base plate 1. It includes a connecting part 1-1 and a triangular conical part 1-2. The conical part 1-2 is connected to the bridge deck base plate 1 through the connecting part 1-1. The setting of the conical part 1-2 can effectively prevent the bridge deck 4 from separating from the bridge deck base plate 1, thereby improving the connection strength between the bridge deck 4 and the bridge deck base plate.

[0032] The bridge deck bottom plate 1 has a first overlapping part 1-3 and a second overlapping part 1-4 on both sides. The first overlapping part 1-3 and the second overlapping part 1-4 have similar structures, both including an L-shaped connecting part 1-7 and a limiting baffle 1-8. The L-shaped connecting part 1-7 and the limiting baffle 1-8 together form an overlapping groove 1-5. The outer side of the L-shaped connecting part 1-7 and the limiting baffle 1-8 forms an overlapping joint 1-6. The width of the overlapping groove 1-5 of the first overlapping part 1-3 is slightly larger than the overlapping joint 1-6 of the second overlapping part 1-3, so that the overlapping groove 1-5 of the first overlapping part 1-3 and the overlapping joint 1-6 of the second overlapping part 1-3 can overlap, thereby realizing the overlapping of adjacent bridge deck bottom plates 1.

[0033] Concrete 9 is filled at both ends of the main beam 2, and sealing plates 10 are provided at both ends of the main beam 2 of the pedestrian bridge structure to prevent liquid accumulation inside the main beam 2 and thus prevent corrosion of the main beam 2.

[0034] The above-mentioned construction method for a pedestrian bridge structure includes the following steps: S1, according to construction requirements, prefabricate bridge deck bottom slab 1, main beam 2, and crossbeam 3; S2, transport the prefabricated components to the construction site, weld the prefabricated components to form multiple fish skeletons, and then hoist and weld the fish skeletons in sections to form the main body of the bridge; S3, After the main body of the bridge is welded, concrete 9 is poured into the main beams 2 at both ends of the main body of the bridge. S4, a bridge deck 1 is laid on top of the crossbeam 3. Welding studs 6 are driven into the overlapping part of the bridge deck 1 and the crossbeam 3. Welding studs 6 penetrate the bridge deck 1 and are welded to the upper flange plate of the crossbeam 3. S5, the steel bars of the bridge deck 1 are laid and tied on the bridge deck 1, and then concrete is poured to complete the bridge deck 4. Then the pavement layer and guardrail 5 are constructed on the bridge deck 4.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0036] Although this document makes extensive use of terms corresponding to the figure labels, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the essence of the invention; interpreting them as any kind of additional limitation would be contrary to the spirit of the invention.

Claims

1. A pedestrian bridge structure, characterized in that, The system includes multiple interconnected fish skeletons, each fish skeleton consisting of a main beam (2) and a crossbeam (3). The crossbeam (3) is fixed to the main beam (2), and there is a height difference between the top of the main beam (2) and the upper end face of the crossbeam (3). A bridge deck base plate (1) for wrapping the top of the fish skeleton is laid on the fish skeleton, and a bridge deck panel (4) is provided on the bridge deck base plate (1). Guardrails (5) are provided on both sides of the bridge deck panel (4). The cross section of the main beam (2) is circular. The top height of the main beam (2) is higher than the upper end of the cross beam (3). When there is liquid on the main beam (2), it will flow to the bottom of the main beam (2) along the surface of the main beam (2), thereby preventing the liquid from accumulating on the main beam (2) and preventing the main beam (2) from rusting. The cross section of the crossbeam (3) is I-shaped, including an upper end plate and a lower end plate. The upper end plate and the lower end plate of the crossbeam (3) are provided with drainage grooves (3-3). The drainage grooves (3-3) and the side wall of the main beam (2) form drainage channels to facilitate the discharge of liquid on the upper end plate and the lower end plate and prevent liquid from accumulating on the crossbeam (3). A guide plate (3-4) is provided in the middle of the crossbeam (3). The guide plate (3-4) is inclined relative to the axis of the main beam (2). The guide plate (3-4) improves the connection strength between the crossbeam (3) and the main beam (2). At the same time, the guide plate (3-4) guides the liquid to the outside of the crossbeam (3) to prevent the liquid on the upper end plate of the crossbeam (3) from flowing to the lower end plate of the crossbeam (3).

2. The pedestrian bridge structure according to claim 1, characterized in that, The bottom of the crossbeam (3) is inclined.

3. The pedestrian bridge structure according to claim 1, characterized in that, The crossbeam (3) includes a middle crossbeam (3-1) and an end crossbeam (3-2). The end crossbeam (3-2) is arranged at both ends of the main beam (2), and a support member (8) is provided at the bottom of the end crossbeam (3-2).

4. A pedestrian bridge structure according to claim 3, characterized in that, The support member (8) includes a support base (8-1) and a support plate (8-2). The support base (8-1) is fixed to the bottom of the end beam (3-2), and the support plate (8-2) is arranged inside the end beam (3-2) and is located above the support base (8-1).

5. A pedestrian bridge structure according to claim 1, characterized in that, The bridge deck bottom plate (1) is fixedly connected to the fish skeleton by welding studs (6), and the welding studs (6) extend into the bridge deck (4).

6. A pedestrian bridge structure according to claim 1, characterized in that, A side baffle (7) is provided on the outer end of the crossbeam (3) to limit the bridge deck (4).

7. A pedestrian bridge structure according to claim 1, characterized in that, The bridge deck bottom plate (1) is provided with a limiting structure, which extends into the bridge deck panel (4).

8. A pedestrian bridge structure according to claim 7, characterized in that, The limiting structure includes a connecting part (1-1) and a tapered part (1-2), and the tapered part (1-2) is connected to the bridge deck bottom plate (1) through the connecting part (1-1).

9. A pedestrian bridge structure according to claim 1, characterized in that, The bridge deck bottom plate (1) is provided with a first overlapping part (1-3) and a second overlapping part (1-4) on both sides respectively. An overlapping groove (1-5) is provided in the first overlapping part (1-3), and an overlapping joint (1-6) is provided on the second overlapping part (1-4). The overlapping groove (1-5) and the overlapping joint (1-6) are adapted to each other.

10. A construction method for a pedestrian bridge structure according to any one of claims 1-9, characterized in that, Includes the following steps, S1, according to construction requirements, prefabricate the bridge deck bottom plate (1), main beam (2), and crossbeam (3); S2, transport the prefabricated components to the construction site, weld the prefabricated components to form a fish skeleton, and then hoist and weld the fish skeleton in sections; S3, After the fish skeleton is welded, the main body of the bridge is formed, and concrete (9) is poured into the main beams (2) at both ends of the main body of the bridge. S4, a bridge deck bottom plate (1) is laid on top of the crossbeam (3). Welding studs (6) are driven into the overlapping part of the bridge deck bottom plate (1) and the crossbeam (3). The welding studs (6) penetrate the bridge deck bottom plate (1) and are welded to the upper flange plate of the crossbeam (3). S5, the bridge deck bottom plate (1) steel bars are laid and tied on the bridge deck bottom plate (1), and then concrete (9) is poured to complete the bridge deck (4). Then the pavement layer and guardrail (5) are constructed on the bridge deck (4).

Images