Steel bar truss floor support plate

Abstract

The embodiment of the utility model provides a steel bar truss floor support plate which comprises a steel bar truss, the steel bar truss comprises an upper chord steel bar, two lower chord steel bars and web member steel bars, the upper chord steel bar and the two lower chord steel bars are arranged in a triangular shape, and the upper chord steel bar is connected with each lower chord steel bar through the web member steel bars; the web member steel bars form supporting legs on the outer sides of the lower chord steel bars; the supporting legs are embedded in the concrete bottom plate; wherein supporting parts are arranged at the two ends of the steel bar truss, the supporting parts extend from the upper chord steel bars to the lower chord steel bars, and the bottom ends of the supporting parts are flush with the bottom face of the concrete bottom plate. According to the technical scheme, the supporting parts at the two ends of the steel bar truss are flush with the bottom face of the concrete bottom plate, when the steel bar truss floor support plate is poured, the supporting parts can support the steel bar truss, and it is ensured that the steel bar truss has enough stability. In addition, when the steel bar truss floor support plate is erected on a building cross beam, the supporting part can be directly connected to the building cross beam, and therefore the steel bar truss floor support plate is further fixed.

Description

Technical Field

[0001] This application relates to the field of building floor decking technology, and more particularly to a steel truss floor decking. Background Technology

[0002] With the development of construction technology, prefabricated construction has gradually become the main construction method. Compared with the traditional construction industry, prefabricated buildings mainly use prefabricated components for construction, and these prefabricated components have achieved standardization and industrialization, so prefabricated buildings have higher construction efficiency.

[0003] Currently, in the field of prefabricated floor slabs, various types of precast steel truss floor decks are widely used. The first type of steel truss floor deck with a galvanized bottom formwork is unsuitable for projects where the bottom formwork is directly plastered. The second type of steel truss floor deck requires the bottom formwork to be removed after the concrete is poured and reused, which wastes materials and labor. The third type of floor deck with a fiber cement board bottom formwork is easy to crack and does not participate in the structural floor slab's load-bearing during use, increasing the floor slab thickness and reducing the floor height.

[0004] One type of non-removable bottom membrane steel truss floor deck has a concrete bottom, so after the floor deck is poured, finishing work such as applying putty can be carried out directly on the bottom of the deck. The structural strength is guaranteed and the construction efficiency is high. This type of floor deck is being used more and more widely in the construction industry.

[0005] However, the steel truss on this type of steel truss floor deck is not very stable, and when the steel truss floor deck is erected on the building beam, the steel truss cannot be connected to the building beam, which will affect the stability of the entire steel truss floor deck. Utility Model Content

[0006] In view of the above problems, this application is made to provide a steel truss floor deck to solve or at least partially solve the above problems.

[0007] In one embodiment of this application, a steel truss floor deck is provided, comprising:

[0008] A steel truss, comprising a triangularly arranged top chord steel bars, two bottom chord steel bars, and web steel bars, wherein the top chord steel bars and each of the bottom chord steel bars are connected by the web steel bars; the web steel bars form supports on the outside of the bottom chord steel bars.

[0009] A concrete base slab, wherein the support legs are embedded in the concrete base slab;

[0010] The steel truss has support parts at both ends, which extend from the upper chord steel bars to the lower chord steel bars, and the bottom end of the support part is flush with the bottom surface of the concrete base plate.

[0011] Optionally, the support includes transverse reinforcing bars and vertical reinforcing bars;

[0012] The horizontal reinforcing bars are connected to the two lower chord reinforcing bars respectively. The first end of the vertical reinforcing bar is connected to the upper chord reinforcing bar. The second end of the vertical reinforcing bar extends in the direction of the concrete base slab. The vertical reinforcing bar is also connected to the horizontal reinforcing bars.

[0013] Optionally, the end of the second end of the vertical reinforcing bar is flush with the bottom surface of the concrete base slab.

[0014] Optionally, the length of the steel truss is greater than the length of the concrete base slab, and the steel truss forms overhangs on both sides of the concrete base slab;

[0015] The support portion is located on the outside of the concrete base plate.

[0016] Optionally, the web reinforcement has multiple inverted V-shaped structures, with the support legs formed between adjacent inverted V-shaped structures. The upper end of the inverted V-shaped structure is connected to the upper chord reinforcement, and the lower end of the inverted V-shaped structure is connected to the lower chord reinforcement.

[0017] Optionally, the two ends of the support leg are respectively connected to the lower side of the inverted V-shaped structure on both sides, and the support leg is one of the following: arc shape, triangle, trapezoid, and square.

[0018] Optionally, the outward extension direction of the support leg is parallel to the surface of the concrete base plate.

[0019] Optionally, the upper chord reinforcement and the two lower chord reinforcements are arranged in an isosceles triangle, and the length and diameter of the upper chord reinforcement are equal to or different from the length and diameter of the lower chord reinforcement.

[0020] Optionally, the concrete base slab includes a substrate and a wire mesh;

[0021] The mesh is embedded in the substrate, and the support legs are connected to the mesh.

[0022] Optionally, the concrete base slab further includes a mesh fabric, which is laid on the bottom surface of the concrete base slab.

[0023] In the technical solution provided in this application embodiment, the support portions at both ends of the steel truss are flush with the bottom surface of the concrete base slab. When pouring the steel truss floor deck, the support portions can support the steel truss, ensuring that the steel truss has sufficient stability. In addition, when the steel truss floor deck is erected on the building beam, the support portions can be directly connected to the building beam, thereby further fixing the steel truss floor deck. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This application provides a structural schematic diagram of a steel truss floor decking as an embodiment.

[0026] Figure 2 A cross-sectional view of a steel truss floor slab provided in an embodiment of this application;

[0027] Figure 3 A cross-sectional view of a steel truss provided in an embodiment of this application;

[0028] Figure 4 This is a structural schematic diagram of a steel truss and mesh provided in an embodiment of this application;

[0029] Figure 5 A top view of a steel truss and mesh provided in an embodiment of this application;

[0030] Figure 6 This is a perspective view of a steel truss and mesh provided in an embodiment of this application. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain error range. Furthermore, in the embodiments of this application, "multiple" refers to two or more. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0032] Compared to steel truss floor decks with galvanized steel sheets as the base, steel truss floor decks with concrete base structures do not require the removal of the bottom formwork after the floor construction is completed. Finishing operations such as applying putty can then be performed directly on the bottom surface of the base slab. Furthermore, the concrete base slab can be directly integrated with the poured floor concrete to form a unified structure, effectively enhancing the structural strength of the floor slab.

[0033] The fabrication process of reinforced steel truss floor decks mainly includes two steps: welding the steel truss and placing the steel truss in a formwork, followed by pouring concrete into the formwork to connect the steel truss to the concrete base slab. However, in the second step, the steel truss placed on the formwork is difficult to keep level automatically and requires additional support. If the steel truss cannot be kept level during the pouring of the concrete base slab, it is easy for the steel truss to tilt relative to the concrete base slab due to the different depths at both ends embedded in the concrete. This affects the quality of the reinforced steel truss floor deck, and when such a floor deck is erected on building beams, it can easily lead to unstable support of the steel truss.

[0034] To solve the above technical problems, participants Figures 1 to 3 In one embodiment of this application, a steel truss floor deck is provided, which includes a steel truss 10 and a concrete base slab 20.

[0035] The steel truss 10 includes a triangular arrangement of top chord steel bars 1, two bottom chord steel bars 2, and web steel bars 3. The top chord steel bars 1 and each bottom chord steel bar 2 are connected by the web steel bars 3. Specifically, the two bottom chord steel bars 2 are located on the lower side of the steel truss 10, and the top chord steel bars 1 are located above the bottom chord steel bars 2. Viewed along the length of the steel truss 10, the three steel bars are arranged in parallel. Viewed in cross-section, one top chord steel bar 1 and two bottom chord steel bars 2 form a triangle, and the three steel bars are located at the three vertices of the triangle.

[0036] The web reinforcement 3 is used to connect the top chord reinforcement 1 and the two bottom chord reinforcements 2 into one unit. The number of web reinforcements 3 can be one or more. For example, one web reinforcement 3 can connect the top chord reinforcement 1 and the two bottom chord reinforcements 2 into one structure after multiple bends.

[0037] To facilitate the support and connection of the steel truss 10 to the concrete base slab 20, the web reinforcement 3 forms supports 31 on the outside of the lower chord reinforcement 2, and the supports 31 are embedded in the concrete base slab 20. The supports 31 include supports 31A located on the outside of the first lower chord reinforcement 2, and supports 31B located on the outside of the second lower chord reinforcement 2. The number of supports 31 can be one or more. When the steel truss 10 has multiple supports 31 on one side, the multiple supports 31 are arranged at intervals.

[0038] The steel truss 10 has support portions 30 at both ends, which extend from the upper chord steel bar 1 to the lower chord steel bar 2. The bottom end of the support portion 30 is flush with the bottom surface of the concrete base slab 20. The support portion 30 is connected to the upper chord steel bar 1 and the lower chord steel bar 2 respectively, and the support portion 30 can provide effective support for the entire steel truss 10.

[0039] Because the bottom end of the support part 30 is flush with the bottom surface of the concrete base slab 20, when the steel truss 10 is placed on the formwork for pouring the concrete base slab 20, the support part 30 can be directly supported on the formwork, and the steel truss 10 will be stably parallel to the formwork. Subsequently, when pouring the concrete base slab 20, both ends of the steel truss 10 are embedded in the concrete base slab 20 to the same depth, and the steel truss 10 will not tilt relative to the concrete base slab 20, resulting in better quality of the steel truss floor deck.

[0040] See Figure 1 and Figure 3 In one embodiment provided in this application, the support 30 includes a horizontal steel bar 8 and a vertical steel bar 7. The horizontal steel bar 8 is connected to two lower chord steel bars 2 respectively. The first end of the vertical steel bar 7 is connected to the upper chord steel bar 1. The second end of the vertical steel bar 7 extends in the direction of the concrete base slab 20. The vertical steel bar 7 is also connected to the horizontal steel bar 8.

[0041] The horizontal reinforcing bars 8 and the vertical reinforcing bars 7 form a cross shape, and the support part 30 can not only form a support end on the bottom surface of the concrete base plate 20, but also make the connection between the upper chord reinforcing bar 1 and the lower chord reinforcing bar 2 more stable.

[0042] When the steel truss floor deck is erected on the building beam, in addition to directly erecting the concrete base slab 20 on the building beam, the steel truss floor deck can also be supported on the building beam by the vertical steel bars 7, with the second end of the vertical steel bar 7 flush with the bottom surface of the concrete base slab 20. This type of steel truss floor deck has better adaptability and can meet the needs of use in various scenarios.

[0043] It should be noted that building beams can be steel beams in steel structure buildings or concrete beams in concrete buildings. After multiple steel truss floor slabs are spliced ​​together, a floor platform can be formed, and then concrete can be poured on the floor platform to form a complete concrete floor slab.

[0044] See Figure 1 In one embodiment provided in this application, the length of the steel truss 10 is greater than the length of the concrete base slab 20, the steel truss 10 forms overhangs on both sides of the concrete base slab 20, and the support portion 30 is located on the outside of the concrete base slab 20.

[0045] The overhangs formed by the steel truss 10 on both sides of the concrete base slab 20 have the same length, and the support part 30 is located at the end of the overhang. When the steel truss floor slab is erected on the building beam, the overhang can support the steel truss floor slab, and the support part 30 is directly supported on the building beam, which can also reduce the support pressure on the concrete base slab 20.

[0046] See Figure 1 In one embodiment provided in this application, the web reinforcement 3 has multiple inverted V-shaped structures, and a support 31 is formed between adjacent inverted V-shaped structures. The upper end of the inverted V-shaped structure is connected to the upper chord reinforcement 1, and the lower end of the inverted V-shaped structure is connected to the lower chord reinforcement 2.

[0047] The web reinforcement 3 can be formed by connecting multiple sections of reinforcement to form an inverted V-shaped structure and support 31, or it can be a more complete reinforcement that is bent multiple times to form multiple inverted V-shaped structures and support 31.

[0048] The inverted V-shaped structure formed by the web reinforcement 3 and the support legs 31 are arranged at intervals. The two ends of the support legs 31 are respectively connected to the lower side of the inverted V-shaped structure on the adjacent two sides.

[0049] The structural shape of the support leg 31 includes, but is not limited to, arc shape, triangle, trapezoid, square, etc. Setting the support leg 31 on the steel truss 10 can not only help support the steel truss 10, but also improve the connection strength between the steel truss 10 and the concrete base 20 after the concrete base 20 is poured.

[0050] As mentioned above, the steel truss 10 has a structure that is smaller on top and larger on the bottom, similar to an upside-down triangular prism. The support legs 31 are located on the bottom of the steel truss 10, which will provide better support for the steel truss 10.

[0051] In one embodiment provided in this application, the outward extension direction of the support leg 31 is parallel to the surface of the concrete base slab 20. Specifically, the support leg 31 extends away from the steel truss 10, and the extension direction of the support leg 31 is parallel to the extension direction of the concrete base slab 20.

[0052] This technical solution maximizes the distance between the two supports 31 of the steel truss 10, thereby providing a more stable support for the steel truss 10. In addition, the contact area between the supports 31 and the concrete base slab 20 is also maximized, which helps to improve the connection stability between the steel truss 10 and the concrete base slab 20.

[0053] As mentioned above, the steel truss 10 has one upper chord steel bar 1 and two lower chord steel bars 2 arranged in a triangular pattern. The shape of the triangle includes, but is not limited to, a right triangle, an acute triangle, an obtuse triangle, an isosceles triangle, and an equilateral triangle.

[0054] In one specific embodiment, taking an isosceles triangle as an example, the top chord steel bar 1 and two bottom chord steel bars 2 are arranged in an isosceles triangle, with the two bottom chord steel bars 2 located at the two base angles of the isosceles triangle. To facilitate the production and processing of the steel truss 10, the length and diameter of the top chord steel bar 1 are equal to the length and diameter of the bottom chord steel bar 2, thereby facilitating the unified processing of the top chord steel bar 1 and the bottom chord steel bar 2.

[0055] See Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 In one embodiment provided in this application, the concrete base slab 20 includes a substrate 4 and a wire mesh 5. The wire mesh 5 is embedded in the substrate 4, and the support legs 31 are connected to the wire mesh 5. The material of the wire mesh 5 includes, but is not limited to, metal, high-strength plastic, and fiberglass.

[0056] The support leg 31 is fastened to the mesh 5. This can prevent the steel truss 10 from shifting before the concrete has solidified, and it can also improve the connection strength between the steel truss 10 and the concrete base slab 20.

[0057] See Figure 4 and Figure 6 In one specific embodiment, the mesh 5 is a metal mesh 5. When pouring the concrete substrate 4, the metal mesh 5 is first welded to the support leg 31, and then the concrete substrate 4 is poured to form a complete concrete base plate 20.

[0058] Furthermore, the concrete base slab 20 also includes a mesh fabric 6, which is disposed on the bottom surface of the concrete base slab 20. After the concrete is poured, some of the concrete can penetrate into the mesh fabric 6, thereby forming a high-strength concrete structure. The mesh fabric 6 not only enhances the structural strength of the concrete base slab 20, but also prevents the bottom surface of the concrete from peeling off.

[0059] In addition, when the concrete slurry penetrates into the mesh cloth 6, it can form a rough concrete structure on the lower surface of the concrete base plate 20. When applying putty or other finishing work directly on the bottom surface of the concrete base plate 20 later, the putty material will adhere more easily to the bottom surface of the concrete base plate 20.

[0060] The following is a brief introduction to the prefabrication process of the steel truss floor deck provided in this application through a specific embodiment.

[0061] First, the required top chord steel bars 1, bottom chord steel bars 2, and web steel bars 3 are welded together to form a steel truss 10. Next, the metal mesh 5, which needs to be embedded in the concrete base slab 20, is welded to the support legs 31 of the steel truss 10. Multiple steel trusses 10 can be welded onto one metal mesh 5 at the same time, and the multiple steel trusses 10 are parallel and spaced apart on the metal mesh 5.

[0062] Before pouring the concrete base slab 20, a release agent needs to be applied to the formwork. Then, the side formwork is erected on the formwork according to the size of the steel truss floor deck slab. Fiberglass mesh 6 is laid on the platform after the side formwork is erected. Then, the welded steel truss 10 with wire mesh is installed on the mesh 6. Then, the concrete is mixed and poured. After the concrete is poured, it is vibrated. After the concrete is vibrated, it is roughened and then transferred to the curing kiln for curing. After the curing reaches the required strength, it is demolded, thus completing the production of a steel truss floor deck slab.

[0063] In summary, in the technical solution provided in this application, the support portions at both ends of the steel truss are flush with the bottom surface of the concrete base slab. During the pouring of the steel truss floor slab, the support portions can support the steel truss, ensuring sufficient stability. Furthermore, when the steel truss floor slab is erected on the building beams, the support portions can be directly connected to the building beams, further securing the steel truss floor slab. Additionally, the bottom surface of the concrete base slab has a mesh fabric, which not only enhances the structural strength of the concrete base slab but also facilitates operations such as applying putty to the bottom surface.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A steel truss floor deck, characterized in that, include: A steel truss, comprising a triangularly arranged top chord steel bars, two bottom chord steel bars, and web steel bars, wherein the top chord steel bars and each of the bottom chord steel bars are connected by the web steel bars; the web steel bars form supports on the outside of the bottom chord steel bars. A concrete base slab, wherein the support legs are embedded in the concrete base slab; The steel truss has support parts at both ends, which extend from the upper chord steel bar to the lower chord steel bar, and the bottom end of the support part is flush with the bottom surface of the concrete base plate. The support includes vertical reinforcing bars and horizontal reinforcing bars, and the end of the second end of the vertical reinforcing bar is flush with the bottom surface of the concrete base slab. The length of the steel truss is greater than the length of the concrete base slab, and the steel truss forms overhangs on both sides of the concrete base slab; The support portion is located on the outside of the concrete base plate.

2. The steel truss floor decking according to claim 1, characterized in that, The horizontal reinforcing bars are connected to the two lower chord reinforcing bars respectively. The first end of the vertical reinforcing bar is connected to the upper chord reinforcing bar. The second end of the vertical reinforcing bar extends in the direction of the concrete base slab. The vertical reinforcing bar is also connected to the horizontal reinforcing bars.

3. The steel truss floor decking according to claim 1, characterized in that, The web reinforcement has multiple inverted V-shaped structures, with the support legs formed between adjacent inverted V-shaped structures. The upper end of the inverted V-shaped structure is connected to the upper chord reinforcement, and the lower end of the inverted V-shaped structure is connected to the lower chord reinforcement.

4. The steel truss floor decking according to claim 3, characterized in that, The two ends of the support leg are respectively connected to the lower side of the inverted V-shaped structure on both sides, and the support leg is one of the following shapes: arc, triangle, trapezoid, and square.

5. The reinforced concrete truss floor slab according to any one of claims 1 or 4, characterized in that, The outward extension direction of the support leg is parallel to the surface of the concrete base plate.

6. The steel truss floor decking according to claim 1, characterized in that, The upper chord steel bar and the two lower chord steel bars are arranged in an isosceles triangle. The length and diameter of the upper chord steel bar are equal to or different from the length and diameter of the lower chord steel bar.

7. The steel truss floor decking according to claim 1, characterized in that, The concrete base slab includes a substrate and a wire mesh. The mesh is embedded in the substrate, and the support leg is connected to the mesh.

8. The steel truss floor decking according to claim 7, characterized in that, The concrete base slab also includes a mesh fabric, which is laid on the bottom surface of the concrete base slab.

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