Metal composite walkway plate

Abstract

The utility model discloses a kind of metal composite material walkway plates, comprising: footpath cantilever support, footpath cantilever support is spacedly arranged multiple along the length direction of prefabricated beam, the fixed end of multiple footpath cantilever support is fixedly connected with prefabricated beam;Steel grating frame, steel grating frame is multiple, the length direction of each steel grating frame Two ends are respectively overlapped and fixed on adjacent two footpath cantilever supports;Continuous no-alkali glass fiber felt reinforced polyurethane rigid foam plate, polyurethane rigid foam plate is multiple, and it is flatly fixed on multiple steel grating frames;Guardrail, guardrail is fixed on the cantilever end of footpath cantilever support.The footpath step plate is combined use by steel grating frame and polyurethane rigid foam plate, can greatly improve the durability of footpath step plate, and has the advantages of light weight, high strength.

Description

Technical Field

[0001] This utility model relates to the field of railway bridge technology, and more specifically to a metal composite material walkway slab. Background Technology

[0002] Railway bridges are an important component of railway lines, and pedestrian walkways are crucial equipment for ensuring the safety of workers and vehicles during daily operations. Over 98% of the pedestrian walkways across the entire railway network are concrete walkways manufactured according to the 8145 special bridge designation, such as the Chinese patent publication number CN218291596U, titled "Railway Bridge Pedestrian Walkway." However, concrete walkways commonly suffer from corrosion, spalling, rust, and breakage, some of which endanger the safety of pedestrians and construction equipment. Furthermore, installation requires welding, making construction inconvenient.

[0003] In addition, the conventional method for replacing bridge pedestrian walkway pavers is to replace them with new ones according to the existing pavers' specifications and dimensions. According to the pedestrian walkway drawings of the 8145 concrete beam of the special bridge, the pedestrian walkway width has five specifications: 0.5m, 0.75m, 1.05m, 1.30m, and 1.55m. The pavers are available in two width specifications: 240mm and 190mm, which can meet the width requirements of various pedestrian walkways. The pavers are available in length specifications: 480mm, 980mm, 1030mm, and 1480mm. Therefore, there are multiple combinations of pedestrian walkway pavers in both length and width. Replacing the pavers with the original ones requires multiple installations, which seriously affects installation efficiency and construction progress.

[0004] Therefore, how to provide a metal composite walkway slab with advantages such as strong weather resistance, light weight, high strength, and convenient construction is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a metal composite material walkway slab with advantages such as high durability, light weight, high strength and convenient construction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A metal composite material walkway slab, comprising:

[0008] Sidewalk cantilever brackets, wherein multiple sidewalk cantilever brackets are arranged at intervals along the length of the precast beam, and the fixed ends of the multiple sidewalk cantilever brackets are fixedly connected to the precast beam;

[0009] A steel grating frame, wherein there are multiple steel grating frames, and the two ends of each steel grating frame in the length direction are respectively overlapped and fixed to two adjacent sidewalk cantilever supports;

[0010] A continuous alkali-free glass fiber mat reinforced rigid polyurethane foam board, wherein there are multiple rigid polyurethane foam boards, which are laid flat and fixed on multiple steel grating frames.

[0011] A guardrail, which is fixed to the cantilever end of the sidewalk cantilever bracket.

[0012] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a metal composite material paving board, which uses a polyurethane rigid foam board reinforced with continuous alkali-free glass fiber felt as a pedestrian paving board. It has the advantages of reinforced plastics such as "durability", "insulation" and "strength", and also has the same advantages as wood such as "lightweight" and "processability". It can be used as a substitute for wood, cement and other plastics. In addition, its glass fiber content, density and strength can be adjusted, which makes it highly designable. It is reinforced with a steel grating frame.

[0013] Therefore, the combination of steel grating frame and rigid polyurethane foam board can greatly improve the durability of the pedestrian walkway and has the advantages of being lightweight and high-strength.

[0014] Furthermore, the rigid polyurethane foam board is available in two width specifications: 490mm and 740mm.

[0015] The beneficial effects of adopting the above technical solution are: while meeting the requirements of sidewalk width, span and installation, only two different widths of rigid polyurethane foam boards are used. This reduces the number of boards that need to be replaced when replacing sidewalk boards, improves installation efficiency and construction progress, and can meet the width requirements of sidewalks of various specifications.

[0016] Furthermore, each of the aforementioned sidewalk cantilever supports includes:

[0017] A vertically fixed angle steel is provided, which is fixedly connected to the precast beam.

[0018] A horizontal supporting angle steel, one end of which is fixedly connected to the upper end of the vertical fixed angle steel, and the two ends of each steel grating frame in the length direction are respectively overlapped and fixed to two adjacent horizontal supporting angle steels;

[0019] The diagonal bracing beam has its two ends fixedly connected to the vertical fixed angle steel and the horizontal supporting angle steel, respectively.

[0020] The beneficial effects of adopting the above technical solution are: the sidewalk cantilever bracket is assembled using standard-specification angle steel, and only pre-made products need to be purchased, without additional processing, which greatly saves construction costs, and the diagonal bracing beam can also improve the support strength of the bracket.

[0021] Furthermore, each of the steel grating frames has a crossbeam at both ends along its length, and the crossbeam is fixed to the horizontal support angle steel by fasteners.

[0022] Furthermore, the fastener includes:

[0023] The U-shaped rod, the crossbeam and the horizontal support angle steel are both located inside the U-shaped rod, and the upper crossbar of the U-shaped rod is pressed against the top surface of the crossbeam, and the lower crossbar of the U-shaped rod abuts against the bottom end of the vertical plate of the horizontal support angle steel;

[0024] A locking bolt, which passes through a through hole on the upper crossbar and is threadedly connected to a threaded hole on the lower crossbar.

[0025] The beneficial effects of adopting the above technical solution are: the steel grating frame can be pressed and fixed on the horizontal support angle steel by using U-shaped rods and locking bolts, without the need for welding, which greatly improves the convenience of disassembly and assembly.

[0026] Furthermore, both ends of the rigid polyurethane foam board along its length are provided with clearance and limiting notches, and the upper crossbar is placed in the clearance and limiting notches.

[0027] The beneficial effects of adopting the above technical solution are as follows: by setting the avoidance limit notch, not only can the upper crossbar of the U-shaped rod be avoided, thus avoiding the problem that the upper crossbar cannot be installed due to interference with the rigid polyurethane foam board, but also the upper crossbar of the U-shaped rod and the avoidance limit notch can restrict the movement of the rigid polyurethane foam board in the left and right directions on the steel grating frame.

[0028] Furthermore, the crossbeams on the two adjacent steel grating frames are located between the vertical bar of the U-shaped rod and the locking bolt.

[0029] The beneficial effect of adopting the above technical solution is that only a single fastener is needed to fix two adjacent steel grating frames, which can greatly reduce the number of fasteners required.

[0030] Furthermore, a limiting bolt is fixed on the upper crossbar, and the limiting bolt abuts against the outer surface of the crossbeam.

[0031] The beneficial effect of adopting the above technical solution is to avoid longitudinal movement of the steel grating frame along the length of the precast beam.

[0032] Furthermore, the crossbeams on two adjacent steel grating frames are separated by the limiting bolts to ensure that there is a certain gap between the two adjacent steel grating frames.

[0033] The beneficial effects of adopting the above technical solution are: the limiting bolts can not only prevent the steel grating frame from moving longitudinally along the length of the precast beam, but also ensure that there is a certain gap between two adjacent steel grating frames to avoid collisions and abnormal noises.

[0034] Furthermore, multiple L-shaped pressure plates are fixed on the outer surface of the crossbeam, and the rigid polyurethane foam board is pressed and fixed by the horizontal pressure plates of the L-shaped pressure plates.

[0035] The beneficial effects of adopting the above technical solution are: the rigid polyurethane foam board is fixed by pressing with an L-shaped pressure plate, which makes the construction convenient and efficient. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0037] Figure 1 This is a first-view structural schematic diagram of a three-dimensional structure of a metal composite walkway slab provided by this utility model.

[0038] Figure 2 for Figure 1 A schematic diagram of part A in the middle.

[0039] Figure 3 for Figure 2 A magnified schematic diagram of the structure of part B in the middle.

[0040] Figure 4 This is a second-view structural schematic diagram of a three-dimensional structure of a metal composite walkway slab provided by this utility model.

[0041] Figure 5 for Figure 4 A magnified schematic diagram of the structure of part C in the middle.

[0042] Figure 6 This is a third-view structural diagram of a three-dimensional structure of a metal composite walkway slab provided by this utility model.

[0043] Figure 7 for Figure 6 A magnified schematic diagram of the structure of part D in the middle.

[0044] Figure 8 This is a schematic diagram of a partially disassembled three-dimensional structure of a metal composite walkway slab provided by this utility model.

[0045] Figure 9 for Figure 8 A schematic diagram of part E in the middle.

[0046] Figure 10 for Figure 9 A magnified schematic diagram of the structure of part F in the middle.

[0047] Figure 11 for Figure 9 A magnified schematic diagram of the structure of a local part of G.

[0048] Figure 12 This is a side view of a metal composite material walkway slab provided by this utility model.

[0049] Figure 13 for Figure 12 A schematic cross-sectional view of the mid-section AA.

[0050] Figure 14 for Figure 13 A magnified schematic diagram of the structure of H in the middle section.

[0051] Figure 15 for Figure 13 A magnified schematic diagram of the structure of part I in the middle. Detailed Implementation

[0052] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0053] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] This utility model embodiment discloses a metal composite material walkway slab, comprising:

[0057] Sidewalk cantilever bracket 1, multiple sidewalk cantilever brackets 1 are arranged at intervals along the length of the precast beam 100, and the fixed ends of multiple sidewalk cantilever brackets 1 are fixedly connected to the precast beam 100.

[0058] Steel grating frame 2, there are multiple steel grating frames 2, and the two ends of each steel grating frame 2 in the length direction are respectively overlapped and fixed on two adjacent sidewalk cantilever supports 1;

[0059] A continuous alkali-free glass fiber mat reinforced polyurethane rigid foam board 3, wherein there are multiple polyurethane rigid foam boards 3, which are laid flat and fixed on multiple steel grating frames 2.

[0060] Guardrail 4 is fixed to the cantilever end of the sidewalk cantilever bracket 1.

[0061] Technical basis for steel grating frame 2:

[0062] According to the requirements of YB / T 4001.1-2019 Steel Grating and Accessories Part 1: Steel Grating, steel grating frames must meet the following conditions when used as concrete sidewalk pavers:

[0063] 1. The steel grating frame platform must be designed to withstand a uniformly distributed load of 4KN / m2;

[0064] 2. The deflection of the steel grating frame should not exceed 1 / 200 of the span, and the maximum should not exceed 4mm;

[0065] 3. The clear clearance of the steel grating frame is insufficient to allow a sphere with a diameter of 35mm to fall through;

[0066] 3. Rigid polyurethane board (replaced with rigid polyurethane foam board reinforced with continuous alkali-free glass fiber mat).

[0067] Continuous alkali-free glass fiber mat reinforced rigid polyurethane foam board 3 is a lightweight, corrosion-resistant structural material manufactured through a continuous production line process. It possesses the advantages of reinforced plastics, such as durability, insulation, and strength, while also exhibiting the same lightweight and processability characteristics as wood. It can serve as a substitute for wood, cement, and other plastics. Furthermore, its glass fiber content, density, and strength can be adjusted, offering high design flexibility and wide applicability in various fields.

[0068] In some embodiments, the sidewalk width is available in five specifications: 0.5m, 0.75m, 1.05m, 1.30m, and 1.55m. The rigid polyurethane foam board 3 is available in lengths of 480mm, 980mm, 1030mm, and 1480mm. The rigid polyurethane foam board 3 is also available in widths of 490mm and 740mm instead of the original two specifications of 240mm and 190mm. This reduces the number of boards that need to be replaced while still meeting the sidewalk width, span, and installation requirements.

[0069] For example:

[0070] A 1.55m wide sidewalk requires 6 treads (190+190+190+240+240+240mm) in width. A new one would only require 2 treads (740+740mm).

[0071] A 1.3m sidewalk requires 6 treads in the width direction (190+190+190+190+240+240mm), but the new structure only requires 2 treads (490+740mm).

[0072] In some embodiments, each sidewalk cantilever bracket 1 includes:

[0073] Vertical fixing angle steel 11 is fixedly connected to precast beam 100;

[0074] Horizontal support angle steel 12, one end of which is bolted or pre-welded to the upper end of vertical fixed angle steel 11, and the two ends of each steel grating frame 2 in the length direction are respectively overlapped and fixed on two adjacent horizontal support angle steels 12.

[0075] The diagonal bracing beam 13 has its two ends fixed to the vertical fixed angle steel 11 and the horizontal supporting angle steel 12 by bolts or pre-welding.

[0076] In another embodiment, a connection structure between the steel grating frame 2 and the horizontal support angle steel 12 is provided. Specifically, each steel grating frame 2 has a crossbeam 21 at both ends in the length direction, and the crossbeam 21 is fixed to the horizontal support angle steel 12 by a fastener 5.

[0077] Fastener 5 includes:

[0078] The U-shaped rod 51, the crossbeam 21 and the horizontal support angle steel 12 are all located inside the U-shaped rod 51, and the upper crossbeam 511 of the U-shaped rod 51 is pressed against the top surface of the crossbeam 21, and the lower crossbeam 512 of the U-shaped rod 51 abuts against the bottom end of the vertical plate 121 of the horizontal support angle steel 12.

[0079] Locking bolt 52 passes through the through hole 5111 on the upper crossbar 511 and is threadedly connected to the threaded hole 5121 on the lower crossbar 512.

[0080] Both ends of the rigid polyurethane foam board 3 along its length are provided with clearance and limiting notches 31, and the upper crossbar 511 is placed in the clearance and limiting notches 31.

[0081] The crossbeams 21 on the two adjacent steel grating frames 2 are located between the vertical bar 513 of the U-shaped bar 51 and the locking bolt 52.

[0082] A limiting bolt 6 is fixed on the upper crossbar 511, and the limiting bolt 6 abuts against the outer side of the crossbeam 21.

[0083] See Figure 15 The crossbeams 21 on two adjacent steel grating frames 2 are separated by limiting bolts 6 to ensure that there is a certain gap between the two adjacent steel grating frames 2.

[0084] In other embodiments, a connection structure between the rigid polyurethane foam board 3 and the steel grating frame 2 is provided. Specifically, multiple L-shaped pressure plates 7 are screwed onto the outer surface of the crossbeam 21, and the rigid polyurethane foam board 3 is pressed and fixed by the horizontal pressure plate 71 of the L-shaped pressure plate 7.

[0085] The pedestrian walkway tread of this utility model uses a combination of steel grating frame and rigid polyurethane foam board, which has the advantages of high durability, light weight, high strength and convenient construction.

[0086] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0087] The above description of the disclosed embodiments enables those skilled in the art to make or use the present 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 present invention. Therefore, the present 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.

Claims

1. A metal composite material walkway slab, characterized in that, include: Sidewalk cantilever bracket (1), wherein multiple sidewalk cantilever brackets (1) are arranged at intervals along the length direction of the precast beam (100), and the fixed ends of the multiple sidewalk cantilever brackets (1) are fixedly connected to the precast beam (100); A steel grating frame (2), wherein there are multiple steel grating frames (2), and the two ends of each steel grating frame (2) in the length direction are respectively overlapped and fixed on two adjacent sidewalk cantilever supports (1); A continuous alkali-free glass fiber mat reinforced polyurethane rigid foam board (3), wherein there are multiple polyurethane rigid foam boards (3), which are laid flat and fixed on multiple steel grating frames (2); The guardrail (4) is fixed to the cantilever end of the sidewalk cantilever bracket (1).

2. The metal composite material walkway slab according to claim 1, characterized in that, Each of the aforementioned sidewalk cantilever brackets (1) includes: A vertical fixed angle steel (11) is fixedly connected to the precast beam (100); A horizontal support angle steel (12) is provided, one end of which is fixedly connected to the upper end of the vertical fixed angle steel (11). The two ends of each steel grid frame (2) in the length direction are respectively overlapped and fixed on two adjacent horizontal support angle steels (12). The diagonal bracing beam (13) is fixedly connected at both ends to the vertical fixed angle steel (11) and the horizontal supporting angle steel (12), respectively.

3. The metal composite material walkway slab according to claim 2, characterized in that, Each of the steel grating frames (2) has a crossbeam (21) at both ends along its length, and the crossbeam (21) is fixed to the horizontal support angle steel (12) by a fastener (5).

4. The metal composite material walkway slab according to claim 3, characterized in that, The fastener (5) includes: The U-shaped rod (51) is located inside the crossbeam (21) and the horizontal support angle steel (12). The upper crossbar (511) of the U-shaped rod (51) is pressed against the top surface of the crossbeam (21), and the lower crossbar (512) of the U-shaped rod (51) abuts against the bottom end of the vertical plate (121) of the horizontal support angle steel (12). A locking bolt (52) is threaded through a through hole (5111) on the upper crossbar (511) and threaded into a threaded hole (5121) on the lower crossbar (512).

5. A metal composite material walkway slab according to claim 4, characterized in that, Both ends of the rigid polyurethane foam board (3) along its length are provided with clearance and limiting notches (31), and the upper crossbar (511) is placed in the clearance and limiting notches (31).

6. The metal composite material walkway slab according to claim 5, characterized in that, The crossbeams (21) on the two adjacent steel grating frames (2) are located between the vertical bar (513) of the U-shaped rod (51) and the locking bolt (52).

7. A metal composite material walkway slab according to any one of claims 4-6, characterized in that, A limiting bolt (6) is fixed on the upper crossbar (511), and the limiting bolt (6) abuts against the outer side of the crossbeam (21).

8. A metal composite material walkway slab according to claim 7, characterized in that, The crossbeams (21) on two adjacent steel grating frames (2) are separated by the limiting bolts (6) to ensure that there is a certain gap between the two adjacent steel grating frames (2).

9. A metal composite material walkway slab according to any one of claims 3-6 and 8, characterized in that, Multiple L-shaped pressure plates (7) are fixed on the outer side of the crossbeam (21), and the rigid polyurethane foam board (3) is pressed and fixed by the horizontal pressure plate (71) of the L-shaped pressure plate (7).

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