A steel truss bridge roadway slab

Abstract

This application discloses a reinforced truss bridge pavement slab. Multiple precast slabs are aligned with the length of a base slab. Multiple truss units are aligned with the length of their corresponding precast slabs. Multiple stiffening components are positioned at one-quarter to three-quarters of the height of the corresponding truss unit. A first concrete layer covers the precast slabs, and a second concrete layer is placed above and connected to the first layer. In this application, the load is first transferred to the truss units and the first layer via the second concrete layer, and then to the base slab via the precast slabs. The base slab then distributes the load across the bridge structure, improving the load-bearing capacity of the pavement slab. The stiffening components ensure that the pavement slab as a whole meets the load-bearing requirements, eliminating the need to disassemble the base slab and skipping the step of erecting the base slab at the longitudinal and transverse wet joints, thus simplifying the construction of the pavement slab.

Description

Technical Field

[0001] This application relates to the field of roadway slab technology, and more particularly to a roadway slab for steel truss bridges. Background Technology

[0002] Precast UHPC slabs and precast steel trusses serve as the basic assembly components for bridge deck construction. After all the precast assembly components are hoisted and installed, ordinary C50 reinforced concrete is poured on top of them. Combined with shear studs embedded in the top surface of the main beam and longitudinal and transverse steel bars, a composite roadway slab is finally formed and connected to the steel main beam to form an integrated whole, jointly participating in the overall load-bearing capacity of the bridge deck.

[0003] In existing technologies, the roadway slabs of traditional steel-concrete composite beam bridges are generally constructed using either cast-in-place or precast concrete slabs.

[0004] When a bottom formwork needs to be erected for a monolithic cast-in-place construction surface, its assembly and disassembly become quite troublesome, especially when the bridge is high. Furthermore, due to the heavy weight of the precast concrete slabs, bottom formwork also needs to be erected at the longitudinal and transverse wet joints, and the connection process for the longitudinal and transverse reinforcing bars is relatively complex.

[0005] The prefabrication of steel trusses in the erection of precast concrete slabs involves a large amount of steel bar welding work, resulting in low mechanization and increased labor costs. Even though the steel trusses used in precast floor slabs for civil and industrial buildings have relatively mature mechanized processing systems, the strict limitations on steel bar and truss dimensions mean that direct use cannot meet the load-bearing requirements of bridge driveway slabs. Utility Model Content

[0006] This application provides a steel truss bridge roadway slab, which aims to meet the stress requirements of the roadway slab while facilitating its construction.

[0007] To achieve the above objectives, this application provides the following technical solutions:

[0008] A steel truss bridge road slab includes a base slab, multiple precast installation slabs, multiple truss units, multiple stiffening components, a first pouring layer, and a second pouring layer; the base slab is horizontally arranged, and the length direction of the base slab is consistent with the extension direction of the bridge.

[0009] Multiple precast installation slabs are spaced apart on the side of the base plate away from the bridge, and the length direction of the multiple precast installation slabs is consistent with the length direction of the base plate.

[0010] Multiple truss units are fixedly mounted on corresponding prefabricated mounting plates, and the length direction of the multiple truss units is consistent with the length direction of the corresponding prefabricated mounting plates;

[0011] Multiple stiffening components are fixedly installed inside the corresponding truss unit and located at one-quarter to three-quarters of the height of the corresponding truss unit.

[0012] The first pouring layer is set on the base plate, and the concrete structure of the first pouring layer covers the precast installation plate to form an integrated structure;

[0013] The second pouring layer is set above the first pouring layer and is connected to the first pouring layer; the concrete structure of the second pouring layer contains multiple first reinforcing bars and multiple second reinforcing bars; the axial length direction of the multiple first reinforcing bars is perpendicular to the axial length direction of the truss unit, and the periphery of the multiple first reinforcing bars is fixedly connected to the side of the truss unit away from the precast installation plate.

[0014] Multiple second reinforcing bars are fixedly installed on the side of multiple first reinforcing bars away from the truss unit, and the axial length direction of the multiple second reinforcing bars is consistent with the axial length direction of the truss unit.

[0015] Furthermore, the truss unit includes two lower chords, an upper chord, and multiple web member groups;

[0016] Two lower chord members are horizontally spaced on the two inner sides of the corresponding precast installation slab along the extension direction of the bridge, and the length direction of the two lower chord members is consistent with the length direction of the precast installation slab.

[0017] The upper chord is spaced between the two lower chords and is located above the midpoint of the distance between the two lower chords;

[0018] Multiple web member assemblies are continuously arranged between the upper chord and the two lower chords along the length of the lower chord, and together with the upper chord and the two lower chords, they form a conical structure. The inner surfaces of the multiple web member assemblies are fixedly connected to the periphery of the stiffening assembly.

[0019] Furthermore, the web member assembly includes two first web members and two second web members;

[0020] The ends of the two first web members near the precast mounting plate are separated from each other along the axial length of the lower chord and are fixedly connected to the side of the corresponding lower chord away from the precast mounting plate. The ends of the two first web members away from the precast mounting plate are fixedly connected to the side of the upper chord near the precast mounting plate.

[0021] The ends of the two second web members near the precast mounting plate are separated from each other along the axial length of the lower chord and are fixedly connected to the side of the other corresponding lower chord that is away from the precast mounting plate. The ends of the two second web members away from the precast mounting plate abut each other along the axial length of the upper chord and are fixedly connected to the side of the upper chord that is near the precast mounting plate.

[0022] The ends of the two first web members furthest from the precast mounting plate are fixedly connected to the ends of the two second web members furthest from the precast mounting plate.

[0023] The two first web members and the two second web members are fixedly connected to the periphery of the stiffening assembly at positions one-quarter to three-quarters of their height.

[0024] Furthermore, the stiffening assembly includes two first stiffening rods and two second stiffening rods;

[0025] Two first stiffeners are horizontally spaced inside the truss unit and located at halfway up its height.

[0026] The axial length direction of the two first stiffening rods is consistent with the axial length direction of the upper chord;

[0027] One of the first stiffening rods is fixedly connected to the circumference of the first web member, and the other of the first stiffening rods is fixedly connected to the circumference of the second web member.

[0028] One end of the second stiffening rod is fixedly connected to the inner side of one of the first stiffening rods, and the other end is fixedly connected to the inner side of the other first stiffening rod.

[0029] Furthermore, the two ends of the first stiffening rod are fixedly connected to the two ends of the second stiffening rod in sequence, forming any one of the following integrated structures: rectangular structure, trapezoidal structure, or parallelogram structure.

[0030] Furthermore, the prefabricated mounting plate is a groove-shaped structure with the groove opening facing towards the upper chord. The bottom of the groove of the prefabricated mounting plate is fixedly connected to the upper surface of the base plate. The length direction of the groove of the prefabricated mounting plate is consistent with the axial length direction of the two lower chords, and the two side groove walls of the prefabricated mounting plate are fixedly connected to the periphery of the corresponding lower chords.

[0031] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects:

[0032] In this application, when vehicle loads are applied to the roadway slab, the load is first transferred to the truss units and the first cast-in-place layer through the second cast-in-place layer, and then transferred to the bottom slab through the precast installation plate. The bottom slab then distributes the load to the bridge structure. The truss units, as the main load-bearing structure, effectively transfer the load to both sides of the bridge or the supporting structure through their spatial truss function, improving the load-bearing capacity of the roadway slab. The stiffening components enhance the local strength and rigidity of the truss units, preventing excessive deformation of the truss units under load, ensuring that the roadway slab as a whole meets the stress requirements. Furthermore, this application eliminates the need for disassembly and assembly of the bottom slab, skipping the process of erecting the bottom slab at the longitudinal and transverse wet joints, thus simplifying the construction of the roadway slab. Attached Figure Description

[0033] 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 of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a structural schematic diagram of the truss unit and stiffening assembly provided in the embodiments of this application;

[0035] Figure 2 This is a structural schematic diagram of the truss unit and stiffening assembly in the assembled state provided in the embodiments of this application;

[0036] Figure 3 This is a structural schematic diagram of the truss unit, stiffening assembly, and prefabricated mounting plate in the assembled state provided in the embodiments of this application;

[0037] Figure 4 This is a schematic diagram of the structure for injecting the first casting layer provided in an embodiment of this application;

[0038] Figure 5 This is a structural schematic diagram of the first and second reinforcing bars in their assembled state, provided in an embodiment of this application.

[0039] Figure 6 A schematic diagram of the structure for injecting the first and second reinforcing bars into the second pouring layer, provided in an embodiment of this application;

[0040] Figure 7 Stress test diagrams of the prior art driving lane plate assembly provided in this application embodiment;

[0041] Figure 8 The stress test diagram of the driveway plate assembly provided in this application is shown in the embodiment of this application.

[0042] Icons: 1-Base plate; 2-Precast installation plate; 10-Lower chord; 11-Upper chord; 12-First web member; 13-Second web member; 20-First stiffening member; 21-Second stiffening member; 30-First cast-in-place layer; 40-Second cast-in-place layer; 41-First reinforcing bar; 42-Second reinforcing bar. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0044] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 communication between the inner sides of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0045] like Figures 1-8 As shown, a steel truss bridge road slab includes a base plate 1, multiple precast installation plates 2, multiple truss units, multiple stiffening components, a first pouring layer 30, and a second pouring layer 40. The base plate 1 is horizontally arranged, and its length direction is consistent with the extension direction of the bridge. The multiple precast installation plates 2 are spaced apart on the side of the base plate 1 away from the bridge, and their length directions are consistent with the length direction of the base plate 1. The multiple truss units are fixedly installed on their corresponding precast installation plates 2, and their length directions are consistent with the length direction of their corresponding precast installation plates 2. The multiple stiffening components are fixedly installed inside the corresponding truss units and located at one-quarter to one-quarter of the height of the corresponding truss unit. At the third location; the first pouring layer 30 is set on the base plate 1, and the concrete structure of the first pouring layer 30 covers the precast installation plate 2 to form an integrated structure; the second pouring layer 40 is set above the first pouring layer 30 and is connected to the first pouring layer 30; multiple first reinforcing bars 41 and multiple second reinforcing bars 42 are set in the concrete structure of the second pouring layer 40; the axial length direction of the multiple first reinforcing bars 41 is perpendicular to the axial length direction of the truss unit, and the periphery of the multiple first reinforcing bars 41 is fixedly connected to the side of the truss unit away from the precast installation plate 2; the multiple second reinforcing bars 42 are fixedly set on the side of the multiple first reinforcing bars 41 away from the truss unit, and the axial length direction of the multiple second reinforcing bars 42 is consistent with the axial length direction of the truss unit.

[0046] It should be noted that the concrete pouring of the first pouring layer 30 in this application is carried out after the truss units and stiffening components are installed on the precast mounting plate 2. This is to ensure that the contact portion between the truss units and the precast mounting plate 2 is completely fixed to the precast mounting plate 2, thereby ensuring that the load can be stably transferred to the overall load-bearing structure formed by the truss units and stiffening components. The concrete pouring of the second pouring layer 40 in this application is carried out after the first reinforcing bar 41 is fixedly connected to the upper chord 11, and then the second reinforcing bar 42 is subsequently fixedly connected to the first reinforcing bar 41. The second pouring layer 40 is located above the first pouring layer 30 and is closely connected to the first pouring layer 30, forming a more complete driveway slab structure.

[0047] In the above scheme, the first pouring layer 30 is set on the base slab 1 and covers the precast installation slab 2, forming an integrated structure to enhance the integrity and rigidity of the roadway slab and ensure its stability and durability under load. The concrete structure of the first pouring layer 30 is tightly integrated with the precast installation slab 2 during the pouring process, forming a continuous load-bearing system, which helps to distribute the load more effectively across the entire roadway slab. When the load is applied to the roadway slab, the load is first transferred to the concrete structure of the first pouring layer 30 through the wheels. Then, the load is transferred to the precast installation slab 2 through the first pouring layer 30, and then transferred to the various components of the truss unit through the connection between the precast installation slab 2 and the truss unit, and finally distributed to the supporting structure of the bridge. In the concrete structure of the second pouring layer 40, multiple first reinforcing bars 41 and multiple second reinforcing bars 42 are provided. The first reinforcing bars 41 are fixedly connected to the upper chord 11, and the second reinforcing bars 42 are fixedly located on the side of the first reinforcing bars 41 away from the upper chord 11, allowing the roadway slab to better transfer and distribute loads. Furthermore, the axial length direction of the multiple first reinforcing bars 41 is perpendicular to the axial length direction of the upper chord 11, enabling the first reinforcing bars 41 to act as transverse reinforcements, enhancing the lateral stiffness and stability of the roadway slab. The multiple second reinforcing bars 42 are fixedly located on the side of the multiple first reinforcing bars 41 away from the upper chord 11, and their axial length direction is consistent with the axial length direction of the upper chord 11, allowing the second reinforcing bars 42 to act as longitudinal reinforcements. Together with the first reinforcing bars 41 and the upper chord 11, they form a continuous load-bearing system, enabling the roadway slab to better withstand and distribute the longitudinal forces from vehicle loads.

[0048] The base plate 1 serves as the foundation support for the roadway slab. The base plate 1 is horizontally positioned, and its length direction aligns with the extension direction of the bridge, ensuring the stability and continuity of the roadway slab on the bridge. Precast installation slabs 2 are spaced apart on the side of the base plate 1 furthest from the bridge, forming the load-bearing surface of the roadway slab together with the base plate 1. This facilitates factory production, rapid on-site installation, and improves construction efficiency. Truss units are fixedly mounted on the precast installation slabs 2, with their length direction aligned with the precast installation slabs 2, forming a spatial truss structure. This enhances the overall rigidity and load-bearing capacity of the roadway slab. Stiffening components are located inside the truss units, at positions between one-quarter and three-quarters of their height, further optimizing the stress performance of the roadway slab by strengthening the local strength of the truss units.

[0049] In this application, when vehicle loads are applied to the roadway slab, the load is first transferred to the truss unit and the first cast-in-place layer 30 through the second cast-in-place layer 40, and then transferred to the base slab 1 through the precast installation plate 2. The base slab 1 then distributes the load to the bridge structure. The truss unit, as the main load-bearing structure, effectively transfers the load to both sides of the bridge or the supporting structure through its spatial truss function, improving the load-bearing capacity of the roadway slab. The stiffening components enhance the local strength and rigidity of the truss unit, preventing excessive deformation of the truss unit under load, ensuring that the roadway slab as a whole meets the stress requirements. Furthermore, this application eliminates the need for disassembly and assembly of the base slab, skipping the process of erecting the base slab at the longitudinal and transverse wet joints, thus simplifying the construction of the roadway slab.

[0050] The truss unit includes two lower chords 10, an upper chord 11, and multiple web member groups. The two lower chords 10 are horizontally spaced on the inner sides of the corresponding precast mounting plate 2 along the extension direction of the bridge, and the length direction of the two lower chords 10 is consistent with the length direction of the precast mounting plate 2. The upper chords 11 are spaced between the two lower chords 10 and located above the midpoint of the distance between the two lower chords 10. The multiple web member groups are continuously arranged between the upper chords 11 and the two lower chords 10 along the length direction of the lower chords 10, and together with the upper chords 11 and the two lower chords 10, they form a conical structure. The inner surfaces of the multiple web member groups are fixedly connected to the periphery of the stiffening assembly.

[0051] In the above scheme, two lower chords 10 are horizontally spaced, serving as the bottom support structure of the truss unit. Their length direction is consistent with the prefabricated installation plate 2, ensuring the stability of the truss unit in the bridge's extension direction. The upper chord 11 is located above the midpoint between the two lower chords 10 and is connected to the lower chords 10 through a web member assembly, forming the main load-bearing frame of the truss unit. The continuously arranged web member assembly, together with the upper chord 11 and the two lower chords 11, forms a conical structure. This arrangement not only enhances the stiffness of the truss unit but also helps to distribute the load more effectively throughout the entire truss unit.

[0052] When a load is applied to the driveway slab, the load is first transferred to the lower chord 10 through the prefabricated mounting plate 2, and then distributed to the upper chord 11 and another lower chord 10 through the web members. The tapered web members can more effectively resist deformation under load and distribute the load throughout the entire truss unit. Because the web members are continuously arranged along the axial length of the lower chord 10, the tapered web members can fully bear the load-bearing capacity between the upper chord 11 and the lower chord 10.

[0053] The web member assembly includes two first web members 12 and two second web members 13. The ends of the two first web members 12 closest to the precast mounting plate 2 are spaced apart along the axial length of the lower chord 10 and fixedly connected to the corresponding side of the lower chord 10 away from the precast mounting plate 2. The ends of the two first web members 12 away from the precast mounting plate 2 are fixedly connected to the side of the upper chord 11 closest to the precast mounting plate 2. The ends of the two second web members 13 closest to the precast mounting plate 2 are spaced apart along the axial length of the lower chord 10 and fixedly connected to the other pair of web members 13. On the side of the lower chord 10 away from the precast mounting plate 2, the ends of the two second web members 13 away from the precast mounting plate 2 abut against each other along the axial length of the upper chord 11 and are fixedly connected to the side of the upper chord 11 near the precast mounting plate 2; the ends of the two first web members 12 away from the precast mounting plate 2 and the ends of the two second web members 13 away from the precast mounting plate 2 are fixedly connected, and the two first web members 12 and the two second web members 13 are fixedly connected to the periphery of the stiffening assembly at a position from one-quarter to three-quarters of their height.

[0054] In the above-described scheme, the web member assembly of this application consists of two first web members 12 and two second web members 13, which connect the upper chord 11 and the two lower chords 10 respectively, forming a triangular structural load-bearing unit of the truss unit, which can effectively resist deformation under various loads. The first web members 12 and the second web members 13 are respectively connected to the corresponding lower chords 10 at their ends near the prefabricated mounting plate 2, while at their ends away from the prefabricated mounting plate 2, they abut against each other and connect to the upper chord 11, forming a conical structure. This structure not only enhances the stiffness of the truss unit but also helps to distribute the load more effectively throughout the entire truss unit. The inner side of the conical structure, at a position between one-quarter and three-quarters of the height, is fixedly connected to a stiffening assembly, enabling the truss unit to better withstand loads.

[0055] The stiffening assembly includes two first stiffening rods 20 and two second stiffening rods 21; the two first stiffening rods 20 are horizontally spaced inside the truss unit and located at halfway along its height; the axial length of the two first stiffening rods 20 is consistent with the axial length of the upper chord 11; the periphery of one first stiffening rod 20 is fixedly connected to the periphery of the first web member 12, and the periphery of the other first stiffening rod 20 is fixedly connected to the periphery of the second web member 13; one end of the second stiffening rod 21 is fixedly connected to the inner side of one of the first stiffening rods 20, and the other end is fixedly connected to the inner side of the other first stiffening rod 20.

[0056] In the above scheme, two first stiffening members 20 are horizontally spaced and located at the midpoint of the height direction inside the conical structure, consistent with the axial length direction of the upper chord member 11. The two first stiffening members 20 are fixedly connected to their corresponding first web members 12 and second web members 13, respectively, enhancing the horizontal stiffness of the truss unit. When a load is applied to the driveway slab, the load is first transferred to the lower chord member 10 through the prefabricated mounting plate 2, and then distributed to the upper chord member 11 and the other lower chord member 10 through the web member group. The first stiffening members 20 strengthen the connection between the first web member 12 and the second web member 13, ensuring a more even distribution of the load throughout the entire truss unit.

[0057] The two ends of the two first stiffening rods 20 are fixedly connected to the two ends of the second stiffening rod 21 in sequence, forming any one of the following structures: rectangular structure, trapezoidal structure, and parallelogram structure.

[0058] The integrated structure formed by the second stiffening member 21 and the two first stiffening members 20 ensures the horizontal stiffness of the truss unit and prevents the first web member 12 and the second web member 13 from torsion or deformation under load. Construction personnel can select different combinations of the first stiffening members 20 and the second stiffening members 21 according to different scenario requirements. Furthermore, the integrated structure, including rectangular, trapezoidal, and parallelogram structures, can more effectively resist external loads such as pressure, tension, and shear forces.

[0059] The prefabricated mounting plate 2 is a groove-shaped structure with the groove opening facing close to the upper chord 11. The bottom of the groove of the prefabricated mounting plate 2 is fixedly connected to the upper surface of the base plate 1. The length direction of the groove of the prefabricated mounting plate 2 is consistent with the axial length direction of the two lower chords 10, and the two side groove walls of the prefabricated mounting plate 2 are fixedly connected to the periphery of the corresponding lower chord 10.

[0060] In the above scheme, the prefabricated mounting plate 2 is designed as a groove-shaped structure with its opening facing towards the upper chord 11, enabling a tighter and more stable connection between the prefabricated mounting plate 2 and the truss unit. Simultaneously, the groove cavity of the prefabricated mounting plate 2 provides adjustment space for the truss unit. The bottom of the groove of the prefabricated mounting plate 2 is fixedly connected to the upper surface of the base plate 1, ensuring the vertical stability of the driveway slab. The length direction of the groove of the prefabricated mounting plate 2 is consistent with the axial length direction of the two lower chords 10, more effectively transferring the load to the truss unit. The two side groove walls of the prefabricated mounting plate 2 are fixedly connected to the periphery of the corresponding lower chord 10, enhancing the connection strength between the prefabricated mounting plate 2 and the lower chord 10.

[0061] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0062] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A roadway slab for a reinforced steel truss bridge, characterized in that, It includes a base plate (1), multiple prefabricated installation plates (2), multiple truss units, multiple stiffening components, a first pouring layer (30), and a second pouring layer (40); The base plate (1) is set horizontally, and the length direction of the base plate (1) is consistent with the extension direction of the bridge; Multiple prefabricated installation plates (2) are spaced apart on the side of the base plate (1) away from the bridge, and the length direction of the multiple prefabricated installation plates (2) is consistent with the length direction of the base plate (1). Multiple truss units are fixedly mounted on the corresponding prefabricated mounting plate (2), and the length direction of the multiple truss units is consistent with the length direction of the corresponding prefabricated mounting plate (2); Multiple stiffening components are fixedly installed inside the corresponding truss unit and located at one-quarter to three-quarters of the height of the corresponding truss unit. The first pouring layer (30) is set on the base plate (1), and the concrete structure of the first pouring layer (30) covers the precast installation plate (2) to form an integrated structure; The second pouring layer (40) is disposed above the first pouring layer (30) and is connected to the first pouring layer (30); The concrete structure of the second pouring layer (40) is provided with multiple first steel bars (41) and multiple second steel bars (42); the axial length direction of the multiple first steel bars (41) is perpendicular to the axial length direction of the truss unit, and the circumferential surface of the multiple first steel bars (41) is fixedly connected to the side of the truss unit away from the prefabricated installation plate (2). Multiple second reinforcing bars (42) are fixedly disposed on the side away from the truss unit of multiple first reinforcing bars (41), and the axial length direction of multiple second reinforcing bars (42) is consistent with the axial length direction of the truss unit.

2. The steel truss bridge road slab according to claim 1, characterized in that, The truss unit includes two lower chords (10), an upper chord (11), and multiple web members; The two lower chord members (10) are horizontally spaced on the two inner sides of the corresponding prefabricated mounting plate (2) along the extension direction of the bridge, and the length direction of the two lower chord members (10) is consistent with the length direction of the prefabricated mounting plate (2). The upper chord (11) is spaced between the two lower chords (10) and located above the midpoint of the distance between the two lower chords (10); Multiple web member groups are continuously arranged between the upper chord (11) and the two lower chords (10) along the length direction of the lower chord (10), and form a conical structure with the upper chord (11) and the two lower chords (10). The inner side surfaces of the multiple web member groups are fixedly connected to the periphery of the stiffening assembly.

3. The steel truss bridge road slab according to claim 2, characterized in that, The bracing assembly includes two first bracing members (12) and two second bracing members (13). The two first web members (12) are located at one end near the prefabricated mounting plate (2) and are separated from each other along the axial length of the lower chord (10), and are fixedly connected to the side of the corresponding lower chord (10) away from the prefabricated mounting plate (2). The two first web members (12) are located at one end away from the prefabricated mounting plate (2) and are fixedly connected to the side of the upper chord (11) near the prefabricated mounting plate (2). The two second web members (13) are located at one end near the prefabricated mounting plate (2) along the axial length of the lower chord (10) and are fixedly connected to the other corresponding lower chord (10) on the side away from the prefabricated mounting plate (2). The two second web members (13) are located at one end away from the prefabricated mounting plate (2) along the axial length of the upper chord (11) and are fixedly connected to the upper chord (11) on the side near the prefabricated mounting plate (2). The ends of the two first web members (12) away from the prefabricated mounting plate (2) are fixedly connected to the ends of the two second web members (13) away from the prefabricated mounting plate (2). The two first web members (12) and the two second web members (13) are fixedly connected to the periphery of the stiffening assembly at a position between one-quarter and three-quarters of their height.

4. The steel truss bridge road slab according to claim 3, characterized in that, The stiffening assembly includes two first stiffening rods (20) and two second stiffening rods (21); The two first stiffening rods (20) are horizontally spaced on the inside of the truss unit and located at halfway along its height. The axial length direction of the two first stiffening rods (20) is consistent with the axial length direction of the upper chord rod (11); One of the first stiffening rods (20) is fixedly connected to the periphery of the first web rod (12), and the other of the first stiffening rods (20) is fixedly connected to the periphery of the second web rod (13). One end of the second stiffening rod (21) is fixedly connected to the inner side of one of the first stiffening rods (20), and the other end is fixedly connected to the inner side of the other first stiffening rod (20).

5. The steel truss bridge road slab according to claim 4, characterized in that, The two ends of the first stiffening rod (20) are fixedly connected to the two ends of the second stiffening rod (21) in sequence, forming any one of the following integrated structures: rectangular structure, trapezoidal structure, and parallelogram structure.

6. The steel truss bridge road slab according to claim 2, characterized in that, The prefabricated mounting plate (2) is a groove-shaped structure with the groove facing close to the upper chord (11). The bottom of the groove of the prefabricated mounting plate (2) is fixedly connected to the upper surface of the base plate (1). The groove length direction of the prefabricated mounting plate (2) is consistent with the axial length direction of the two lower chords (10), and the two side groove walls of the prefabricated mounting plate (2) are fixedly connected to the periphery of the corresponding lower chord (10).

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