Foot bridge structure

Abstract

A foot bridge structure comprises a plurality of fish skeletons which are mutually spliced and a bridge body which is formed by splicing the fish skeletons, each fish skeleton comprises a main body beam and cross beams, the cross beams are connected to the two sides of the main body beam respectively, the cross beams are symmetrically arranged relative to the central axis of the main body beam, and a height difference exists between the top of the main body beam and the cross beams. The waterproof liquid is accumulated at the connecting position of the main body beam and the cross beam, so that the connecting position of the main body beam and the cross beam is prevented from being rusted, a bridge floor bottom plate is laid on the fish skeleton, the top of the fish skeleton is wrapped through the bridge floor bottom plate, namely, the bridge floor bottom plate is laid on the upper end faces of the main body beam and the cross beam, and therefore the liquid is stored on the bridge floor bottom plate. The liquid is further prevented from being in contact with the main body beams and the cross beams, so that the main body beams and the cross beams are prevented from being rusted, a bridge deck slab is arranged on the bridge deck bottom plate, and guardrails are arranged on the two sides of the bridge deck slab.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of footbridge, concretely relates to a footbridge structure. BACKGROUND

[0002] Steel-concrete composite structure can give full play to material properties of steel and concrete respectively, has good stress performance and economical cost; compared with concrete structure, it is light in configuration, convenient in construction and strong in adaptability to curve. Therefore, steel-concrete composite structure is widely used in small-span footbridge, and main forms include steel plate-concrete composite beam, steel box-concrete composite beam and steel truss-concrete composite beam. However, the steel structure main body of small-span footbridge is prone to water and dust accumulation, which causes corrosion of the steel structure main body, and the two structures have many welded joints, are prone to corrosion at the welds, have large corrosion work load in later period and high maintenance cost. SUMMARY

[0003] In view of the above problems, the utility model provides a footbridge structure to improve the waterproof performance of the footbridge structure.

[0004] To solve the above technical problems, the utility model adopts the technical scheme that,

[0005] A footbridge structure comprises a plurality of fishbone frames spliced with each other, the fishbone frame comprises a main beam and a cross beam, the cross beam is fixed on the main beam, and a height difference is arranged between the top of the main beam and the upper end face of the cross beam; a bridge floor for wrapping the top of the fishbone frame is arranged on the fishbone frame, a bridge deck is arranged on the bridge floor, and guardrails are arranged on both sides of the bridge deck.

[0006] As an optional scheme of the utility model, the bottom of the cross beam is inclined.

[0007] As an optional scheme of the utility model, the cross beam comprises a middle cross beam and end cross beams, the end cross beams are arranged at both ends of the main beam, and support pieces are arranged at the bottom of the end cross beams.

[0008] As an optional scheme of the utility model, the support piece comprises a support base and a support plate, the support base is fixed at the bottom of the end cross beam, and the support plate is arranged in the end cross beam and located above the support base.

[0009] As an optional scheme of the utility model, the bridge floor is fixedly connected with the fishbone frame through welding nails, and the welding nails partially extend into the bridge deck.

[0010] As an optional scheme of the utility model, side baffles are arranged on the outer end portions of the cross beam, and the side baffles are used for limiting the bridge deck.

[0011] As a preferred scheme of the utility model, the bridge floor bottom plate is equipped with a limiting structure, and the limiting structure extends into the bridge deck.

[0012] As a preferred scheme of the utility model, the limiting structure comprises a connecting portion and a tapered portion, and the tapered portion is connected to the bridge floor bottom plate through the connecting portion.

[0013] As a preferred scheme of the utility model, the two sides of the bridge floor bottom plate are respectively equipped with a first lap joint portion and a second lap joint portion, a lap joint groove is arranged in the first lap joint portion, a lap joint head is arranged on the second lap joint portion, and the lap joint groove and the lap joint head are matched.

[0014] The construction method of the above-mentioned pedestrian bridge structure comprises the following steps,

[0015] S1, prefabricating a bridge floor bottom plate, a main beam and a cross beam according to construction requirements;

[0016] S2, transporting the prefabricated parts to a construction site and welding the prefabricated parts to form a fishbone frame, and then segmentally hoisting and welding the fishbone frame;

[0017] S3, after the fishbone frame is welded, a bridge main body is formed, and concrete is poured into the main beam at both ends of the bridge main body;

[0018] S4, a bridge floor bottom plate is laid above the cross beam, and welding nails are applied to the overlapping part of the bridge floor bottom plate and the cross beam, the welding nails penetrate the bridge floor bottom plate and are welded on the upper flange plate of the cross beam;

[0019] S5, a bridge floor bottom plate is laid and bound on the bridge floor bottom plate, and then concrete is poured to complete the bridge deck, and then a paving layer and a guardrail are constructed on the bridge deck.

[0020] The utility model has the advantages that (1) the height difference is arranged between the top of the main beam and the upper end face of the cross beam, so that the waterproof liquid is accumulated at the connection of the main beam and the cross beam, thereby preventing the main beam and the cross beam from being corroded at the connection.

[0021] (2) the fishbone frame top is wrapped by the bridge floor bottom plate, so that the liquid is further prevented from contacting the main beam and the cross beam, thereby preventing the main beam and the cross beam from being corroded. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a bottom view of the pedestrian bridge structure.

[0023] Figure 2 is a sectional view of the pedestrian bridge structure at the middle cross beam.

[0024] Figure 3 is a sectional view of the pedestrian bridge structure at the end cross beam.

[0025] Figure 4This is a structural schematic diagram of the end beam.

[0026] Figure 5 This is a structural schematic diagram of the bridge deck's bottom slab.

[0027] 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

[0028] The present invention will now be further described with reference to the accompanying drawings.

[0029] 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.

[0030] 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.

[0031] 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°.

[0032] The cross beam 3 comprises a middle cross beam 3-1 and an end cross beam 3-2, the middle cross beam 3-1 and the end cross beam 3-2 are consistent in structure, the cross beams at the two ends of the fishbone frame are the end cross beams 3-2, that is, the end cross beams 3-2 are arranged at the two ends of the main beam 2, the cross beam between the two side end cross beams 3-2 is the middle cross beam 3-1, a support 8 is arranged at the bottom of the end cross beam 3-2, which is used for supporting the fishbone frame, facilitating installation or facilitating subsequent arrangement of bridge pier columns and the like at the lower end of the fishbone frame.

[0033] The cross section of the cross beam 3 is in the shape of an I-beam, comprising an upper end plate and a lower end plate. In order to further prevent liquid from accumulating at the connection between the cross beam 3 and the main beam 2, a liquid drainage groove 3-3 is arranged on the side wall of the upper end plate and the lower end plate of the cross beam 3, and a liquid drainage channel is formed between the liquid drainage groove 3-3 and the side wall of the main beam 2, so as to facilitate the drainage of liquid on the upper end plate and the lower end plate, and prevent liquid from accumulating on the cross beam 3. Further, a flow guide plate 3-4 is arranged at the middle of the cross beam 3, the flow guide plate 3-4 is arranged obliquely relative to the axis of the main beam 2, the connection strength of the cross beam 3 and the main beam 2 is improved through the flow guide plate 3-4, and at the same time, the flow guide plate 3-4 guides liquid to the outside of the cross beam 3, preventing liquid on the upper end plate of the cross beam 3 from remaining on the lower end plate of the cross beam 3.

[0034] The support 8 comprises a support seat 8-1 and a support plate 8-2, the support seat 8-1 is fixed at the bottom of the end cross beam 3-2, and the support plate 8-2 is arranged in the end cross 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 cross beam 3-2. Preferably, a liquid drainage groove is also arranged at the bottom of the support plate 8-2, preventing liquid from accumulating at the support plate 8-2, the support plate 8-2 is located above the support seat 8-1, preventing the end cross beam 3-2 from deforming at the position corresponding to the support seat 8-1.

[0035] The bridge deck bottom plate 1 is fixedly connected with the cross beam 3 or the main beam 2 of the fishbone frame through the welding nails 6, the welding nails 6 partially extend into the bridge deck plate 4, increasing the connection strength between the bridge deck plate 4 and the fishbone frame.

[0036] A side baffle 7 is arranged at the outer end of the cross beam 3, preferably, the side baffles 7 are respectively connected with the middle cross beam 3-1 and the end cross beam 3-2, and the side baffles 7 abut against the bridge deck bottom plate 1, the bridge deck plate 4 is limited through the side baffles 7, facilitating cast-in-place of the bridge deck plate 4.

[0037] In order to further improve the integrity of the structure of the footbridge, a limiting structure is arranged on the bridge deck bottom plate 1, the limiting structure extends into the bridge deck plate 4, in this embodiment, in order to facilitate processing of the limiting structure, the limiting structure is bent from the bridge deck bottom plate 1, comprising a connecting portion 1-1 and a triangular tapered portion 1-2, the tapered portion 1-2 is connected to the bridge deck bottom plate 1 through the connecting portion 1-1, through the arrangement of the tapered portion 1-2, separation of the bridge deck plate 4 from the bridge deck bottom plate 1 can be effectively prevented, and the connection strength of the bridge deck plate 4 and the bridge deck bottom plate is improved.

[0038] The first overlap part 1-3 and the second overlap part 1-4 are arranged on two sides of the bridge floor 1 respectively, the first overlap part 1-3 and the second overlap part 1-4 are similar in structure, and each includes 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 form an overlap groove 1-5, and the outer side of the L-shaped connecting part 1-7 and the limiting baffle 1-8 forms an overlap joint 1-6, the width of the overlap groove 1-5 of the first overlap part 1-3 is slightly greater than that of the overlap joint 1-6 of the second overlap part 1-4, so that the overlap groove 1-5 of the first overlap part 1-3 is overlapped with the overlap joint 1-6 of the second overlap part 1-4, thereby realizing the overlap of the adjacent bridge floors 1.

[0039] The concrete 9 is filled in the main beam 2 at two ends, and the end plate 10 is arranged at two ends of the main beam 2 of the footbridge structure, so that the liquid accumulation in the main beam 2 is prevented, and the corrosion of the main beam 2 is prevented.

[0040] The construction method of the footbridge structure, comprising the following steps,

[0041] S1, the bridge floor 1, the main beam 2 and the cross beam 3 are prefabricated according to the construction requirement;

[0042] S2, the prefabricated parts are transported to the construction site, and the prefabricated parts are welded to form a plurality of fishbone frames, and the fishbone frames are segmented and hoisted and welded to form the bridge main body;

[0043] S3, after the bridge main body is welded, the concrete 9 is poured into the main beam 2 at two ends of the bridge main body;

[0044] S4, the bridge floor 1 is laid above the cross beam 3, and the welding nails 6 are arranged at the overlapping part of the bridge floor 1 and the cross beam 3, the welding nails 6 penetrate the bridge floor 1 and are welded on the upper flange plate of the cross beam 3;

[0045] S5, the bridge floor 1 is laid and bound with the bridge floor 1 reinforcement, then the bridge floor 4 is completed by pouring the concrete, and then the pavement layer and the guardrail 5 are constructed on the bridge floor 4.

[0046] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application; therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0047] Although the corresponding terms of the figure marks are used more in this article, the possibility of using other terms is not excluded; using these terms is only for more convenient description and explanation of the essence of the utility model; it is contrary to the spirit of the utility model to interpret them as any kind of additional limitation.

Claims

1. A footbridge structure, characterized by, The fishbone frame comprises a main beam (2) and a cross beam (3), the cross beam (3) is fixed on the main beam (2), and a height difference is arranged between the top of the main beam (2) and the upper end surface of the cross beam (3); a bridge bottom plate (1) for wrapping the top of the fishbone frame is arranged on the fishbone frame, a bridge plate (4) is arranged on the bridge bottom plate (1), and guardrails (5) are arranged on both sides of the bridge plate (4).

2. A footbridge structure according to claim 1, wherein The bottom of the cross beam (3) is inclined.

3. The footbridge structure of claim 1, wherein, The cross beam (3) comprises a middle cross beam (3-1) and end cross beams (3-2), the end cross beams (3-2) are arranged at the two ends of the main beam (2), and support pieces (8) are arranged at the bottoms of the end cross beams (3-2).

4. A footbridge structure according to claim 3, wherein The support piece (8) comprises a support base (8-1) and a support plate (8-2), the support base (8-1) is fixed at the bottom of the end cross beam (3-2), and the support plate (8-2) is arranged in the end cross beam (3-2) and located above the support base (8-1).

5. The footbridge structure of claim 1, wherein, The bridge bottom plate (1) is fixedly connected with the fishbone frame through welding nails (6), and the welding nails (6) partially extend into the bridge plate (4).

6. A footbridge structure according to claim 1, wherein Side plates (7) are arranged on the outer ends of the cross beam (3), and the bridge plate (4) is limited by the side plates (7).

7. The footbridge structure of claim 1, wherein, The bridge bottom plate (1) is provided with a limiting structure extending into the bridge plate (4).

8. A footbridge structure according to claim 7, wherein The limiting structure comprises a connecting portion (1-1) and a tapered portion (1-2), and the tapered portion (1-2) is connected to the bridge bottom plate (1) through the connecting portion (1-1).

9. The footbridge structure of claim 1, wherein, First and second lap joints (1-3) and (1-4) are arranged on both sides of the bridge bottom plate (1), a lap joint groove (1-5) is arranged in the first lap joint (1-3), a lap joint head (1-6) is arranged on the second lap joint (1-4), and the lap joint groove (1-5) is matched with the lap joint head (1-6).

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