A large-span prestressed steel bar truss laminated slab mounting structure

Abstract

The utility model relates to the technical field of steel bar truss laminated slab, specifically relates to a kind of installation structure of large-span prestressed steel bar truss laminated slab, including laminated slab body, distribution steel bar, installation component, steel bar truss, fixed component and connecting rod;The laminated slab body is set to rectangle, the distribution steel bar is installed on the two side surfaces of laminated slab body, and installation mode is set to welding and riveting, the installation component is installed on the upper surface of laminated slab body, the steel bar truss is installed on the upper surface of installation component, the steel bar truss is provided with 3, and three steel bar trusses are installed in the three-point setting of equilateral triangle, the fixed component is installed between steel bar truss, and installation mode is set to welding, the connecting rod is installed between multiple fixed components.

Description

Technical Field

[0001] This utility model relates to the field of reinforced concrete truss composite slab technology, specifically to an installation structure for a large-span prestressed reinforced concrete truss composite slab. Background Technology

[0002] As modern construction engineering develops towards larger spans, larger spaces, and lighter weights, prestressed steel truss composite slabs, as a new type of building material integrating prestressing technology and the characteristics of steel truss structures, have been widely used in industrial plants, large stadiums, and multi-story public buildings due to their excellent load-bearing capacity, ease of construction, and material savings. Existing prestressed steel truss composite slab structures effectively improve the bending resistance and overall stiffness of the slabs and reduce the structural self-weight by prestressing the bottom of the truss, thus enabling larger spans and higher structural safety. However, in actual construction, due to the large size and heavy weight of the slabs, traditional assembly and installation methods generally suffer from problems such as difficult slab hoisting, poor installation alignment accuracy, and insufficient connection stability. This is especially problematic in high-altitude operations or complex conditions, easily leading to safety hazards and affecting construction efficiency and installation quality. Therefore, there is an urgent need for a specialized installation structure that can effectively improve installation efficiency and structural stability to meet the engineering requirements of efficient, precise, and safe installation of large-span composite slabs.

[0003] To address the aforementioned issues, existing installation methods primarily rely on on-site scaffolding or temporary support systems. The composite slabs are then manually or mechanically hoisted to their designated positions, and finally connected to the main structure through rebar tying and cast-in-place concrete. However, this traditional process is not only cumbersome but also highly dependent on the experience and skill level of the workers, making it difficult to guarantee precise alignment and balanced stress distribution of the composite slabs during installation. Furthermore, on-site scaffolding and temporary support not only increase construction costs and time but also pose safety risks and environmental pollution. In addition, some large composite slabs, due to their weight and span, are prone to warping, misalignment, or uneven stress distribution during installation, compromising the structural stability and durability after installation. Therefore, designing an efficient installation structure for large-span prestressed steel truss composite slabs, while ensuring ease of hoisting and alignment accuracy, can improve structural stability and construction safety during installation, possessing significant engineering application value and promotional value.

[0004] In view of the above, in order to overcome the above technical problems, this utility model designs an installation structure for a large-span prestressed steel truss composite slab, which solves the above technical problems. Utility Model Content

[0005] The technical objective of this invention is to design an installation structure for a large-span prestressed steel truss composite slab that can improve structural stability and construction safety during installation while ensuring ease of hoisting and connection accuracy.

[0006] To achieve the above-mentioned technical objectives, this utility model provides the following technical solution:

[0007] An installation structure for a large-span prestressed reinforced steel truss composite slab includes a composite slab body, distributed reinforcing bars, installation components, a steel truss, fixing components, and reinforcing rods. Through a rational structural layout and connection methods, the various components achieve efficient connection and stable support of the large-span composite slab during installation. The composite slab body is designed as a rectangular structure, possessing excellent flatness and dimensional accuracy, ensuring good load-bearing performance and installation adaptability under large-span conditions. Distributed reinforcing bars are installed on two sides of the composite slab body, and are firmly fixed to the composite slab body using a combination of welding and riveting, forming a reliable load-bearing unit between the reinforcing bars and the slab, enhancing the structural strength and deformation resistance of the composite slab during hoisting and stress. The installation components are located on the upper surface of the composite slab body, serving to support the steel truss and transfer construction loads, ensuring the stability of the composite slab during installation and use.

[0008] The steel trusses are installed above the composite slab body using mounting components. Three trusses are arranged in an equilateral triangle with three-point support, effectively distributing loads in large-span applications, preventing structural damage caused by localized stress concentration, and improving overall stiffness and bending resistance. Fixing components are installed between the steel trusses, connected to them by welding to ensure the truss structure does not loosen or shift due to stress or vibration during construction. Simultaneously, multiple fixing components are interconnected by reinforcing rods, forming a high-strength, high-rigidity overall frame structure. This not only improves the structural stability of the composite slab during transportation and hoisting but also facilitates rapid and precise on-site installation, greatly enhancing the installation efficiency and safety of large-span prestressed steel truss composite slabs.

[0009] The distributed reinforcing bars are arranged in a linear array along the length of the composite slab, effectively enhancing its bending and shear resistance under load and ensuring stress balance and structural stability in large-span applications. The installation components are arranged in two rows, located on the left and right sides of the upper surface of the composite slab, and mirror-symmetrically with the central axis of the slab as the reference. This symmetrical design not only improves the installation accuracy and structural stability of the truss but also effectively disperses concentrated loads on the composite slab during construction, reducing structural deformation. The centerline of the uppermost reinforcing truss coincides with the plane containing the central axis of the composite slab, ensuring that the truss's load-bearing axis is completely aligned with the composite slab's load-bearing axis. This guarantees the directness of force transmission through the truss and the overall stress balance of the composite slab, improving the overall load-bearing efficiency and seismic performance of the installation structure, and meeting the construction and usage requirements under large-span, high-load conditions.

[0010] The composite slab body comprises a frame, a pouring trough, a support frame, and reinforcing ribs. The high strength and stability of the composite slab are achieved through a rational structural layout and connection method. The frame, the main body of the composite slab, is made of high-strength steel, possessing excellent overall rigidity and load-bearing capacity, providing the foundational support structure for the composite slab. The pouring trough, located within the frame, serves as the forming space for subsequent on-site concrete pouring, ensuring a strong bond between the composite slab and the cast-in-place concrete, enhancing the overall integrity and durability of the structure. The support frame, installed inside the pouring trough, primarily supports the sidewalls and bottom slab of the trough during construction, preventing deformation or collapse due to the weight of the concrete. The support frame is fixed to the pouring trough by welding, ensuring its stability under stress. The reinforcing ribs, also located inside the pouring trough, are fixed using a combination of welding and bolting, enabling them to provide effective support in critical stress areas, further enhancing the composite slab's bending, shear, and seismic resistance, ensuring its structural safety and durability in large-span applications.

[0011] High-strength concrete is poured into the casting trench, and the concrete bonds tightly with the inner wall of the trench to form an integral load-bearing structure, effectively improving the load-bearing capacity and crack resistance of the composite slab. The support frame is designed with a zigzag structure. Compared with the traditional straight support method, the zigzag arrangement can evenly distribute the load under stress, enhance the support strength and deformation resistance inside the casting trench, and prevent structural warping or deformation caused by pressure during concrete pouring. At the same time, the reinforcing ribs run through the inside of the support frame, effectively connecting the support frame and the concrete in the casting trench. This means that the reinforcing ribs not only enhance the local load-bearing performance, but also improve the structural stability and safety of the entire composite slab under complex loads such as bending, shearing, and vibration through synergistic force sharing with the support frame. This ensures that the composite slab has excellent structural reliability and durability in large-span applications.

[0012] The installation assembly includes an installation plate and connecting blocks, which work together to achieve a high-strength connection between the composite slab and the steel truss. The installation plate is installed on the upper surface of the composite slab body and is embedded as a pre-embedded part during the manufacturing process of the composite slab. Concrete pouring and curing firmly connect the installation plate to the composite slab body, giving it good load-bearing capacity and pull-out resistance, effectively transferring the loads of the subsequent truss and superstructure. The connecting blocks are located on both sides of the installation plate and are fixedly connected to the installation plate by welding. The welds are evenly distributed and have high welding strength, ensuring that the connecting blocks will not loosen or shift due to vibration or tensile stress during the stress process. This combination structure of the installation plate and connecting blocks not only improves the accuracy and stability of the composite slab connection with the truss during installation, but also makes the subsequent hoisting, splicing, and load transfer more efficient and reliable, meeting the construction safety and structural performance requirements of large-span structures.

[0013] The fixing assembly consists of a limiting ring, a support rod, and a connecting rod. Through a scientific structural layout and connection method, these components achieve a stable connection and precise positioning between the composite slab and the steel truss. The limiting ring, installed on the upper part of the fixing assembly, is mainly used to limit and control the position of the steel truss, ensuring accurate alignment and preventing displacement during installation. The upper end of the support rod connects to the lower side of the limiting ring, serving to bear and transfer the truss load. Its lower end connects to the connecting rod, which evenly transfers the load on the truss to the composite slab body. One end of the connecting rod is welded to the lower part of the support rod, and the other end is fixed to the upper surface of the mounting assembly below by welding, forming a continuous force-bearing path for the entire fixing assembly. This ensures a firm connection and balanced force distribution among the components during installation. Through the precise positioning of the limiting ring and the multi-point support of the support rod and connecting rod, this fixing assembly effectively improves the structural stability and connection accuracy during composite slab installation, preventing structural loosening and misalignment caused by uneven force distribution or vibration.

[0014] The limiting ring is designed as a semi-circular structure. Compared with traditional full-circle or rectangular limiting structures, the semi-circular limiting ring can not only effectively lock the bottom node of the steel truss, preventing lateral slippage or displacement of the truss during installation and under stress, but also disperse some of the load under stress, reducing local stress concentration in the limiting ring body and extending its service life. The support rod is set vertically below the limiting ring, directly transferring the truss load downwards through vertical force application, ensuring the stress stability and verticality of the overall structure. The connecting rod adopts a composite structure design combining a 1 / 4 arc shape and a diagonal brace. The arc part can flexibly buffer the stress fluctuations between the truss and the support rod, reducing the impact of vibration on the connection node, while the diagonal brace enhances lateral support and stabilizes the connection. This allows the entire fixed assembly to maintain good structural rigidity and stress balance under complex stress environments, thereby effectively improving the installation accuracy and structural safety of the composite slab and the truss as a whole.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) The installation structure of the large-span prestressed steel truss composite slab provided by this utility model can significantly improve the installation accuracy and structural stability of the composite slab during construction. Through the coordinated cooperation of the installation components, fixing components and connecting rods, a high-strength and earthquake-resistant overall load-bearing frame is formed between the composite slab and the steel truss, effectively avoiding structural hazards caused by misalignment, deformation or loosening of the plates in traditional assembly methods. At the same time, the design of the pre-embedded installation plate and the mirror-symmetrical arrangement of the installation components enables the composite slab to be quickly and accurately positioned during hoisting and docking, reducing the cumbersome on-site support erection and manual adjustment work. This not only shortens the construction cycle, but also reduces the error of manual operation, improves the safety and work efficiency of the construction site, and has good engineering application value.

[0017] (2) This utility model improves the stress balance and buffering capacity of the connection between the truss and the composite slab through an innovative combination structure of a limiting ring, a support rod, and a 1 / 4 arc-shaped connecting rod. This allows the structure to maintain good stress stability and seismic performance even under large-span loads and complex stress environments, ensuring excellent overall stiffness and durability of the composite slab after installation. Simultaneously, this installation structure effectively reduces node loosening and structural fatigue caused by vibration or uneven loads, extends the service life of the composite slab, and reduces the cost and frequency of subsequent maintenance and reinforcement. It possesses good safety, economy, and application prospects, and is suitable for the structural installation needs of various large-scale building projects. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments 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 from these drawings without creative effort.

[0019] The above and other aspects of the present invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the entire utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0023] Figure 4 This is a utility model Figure 1 A magnified view of a portion of the image.

[0024] In the diagram: 1. Composite slab body; 11. Frame; 12. Casting trough; 13. Support frame; 14. Reinforcing bar; 2. Distribution reinforcement; 3. Mounting assembly; 31. Mounting plate; 32. Connecting block; 4. Steel truss; 5. Fixing assembly; 51. Limiting ring; 52. Support rod; 53. Connecting rod; 6. Reinforcing rod. Detailed Implementation

[0025] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figure 1-4As shown, an installation structure for a large-span prestressed steel truss composite slab includes a composite slab body 1, distributed reinforcing bars 2, installation components 3, a steel truss 4, fixing components 5, and reinforcing rods 6. Through a rational structural layout and connection method, the various components achieve efficient connection and stable support of the large-span composite slab during installation. The composite slab body 1 is designed as a rectangular structure, possessing excellent flatness and dimensional accuracy, ensuring good load-bearing performance and installation adaptability under large-span conditions. Distributed reinforcing bars 2 are installed on two sides of the composite slab body 1, and are firmly fixed to the composite slab body 1 through a combination of welding and riveting, forming a reliable load-bearing whole between the reinforcing bars and the slab, enhancing the structural strength and deformation resistance of the composite slab during hoisting and stress. The installation components 3 are located on the upper surface of the composite slab body 1, serving to support the steel truss 4 and transfer construction loads, ensuring the stability of the composite slab during installation and use.

[0027] The steel truss 4 is installed above the composite slab body 1 via mounting components 3. There are three trusses arranged in an equilateral triangle with three-point support, enabling the steel truss 4 to effectively distribute loads in large-span applications, avoiding structural damage caused by localized stress concentration, and improving overall stiffness and bending resistance. Fixing components 5 are installed between the steel trusses 4, and are connected to the steel trusses 4 by welding to ensure that the truss structure will not loosen or shift due to stress or vibration during construction. Simultaneously, multiple fixing components 5 are interconnected by reinforcing rods 6, forming a high-strength, high-rigidity overall frame structure 11. This not only improves the structural stability of the composite slab during transportation and hoisting but also facilitates quick and precise docking during on-site installation, greatly improving the installation efficiency and safety of large-span prestressed steel truss composite slabs.

[0028] The distributed reinforcing bars 2 are arranged in a linear array uniformly along the length of the composite slab body 1, which can effectively enhance the bending and shear resistance of the composite slab under stress, ensuring the stress balance and structural stability of the slab in large-span applications. The installation components 3 are arranged in two rows, located on the left and right sides of the upper surface of the composite slab body 1, and are arranged in a mirror-symmetrical manner with the central axis of the composite slab body 1 as the symmetry reference. This symmetrical design not only helps to improve the installation accuracy and structural stability of the truss, but also effectively disperses the concentrated load borne by the composite slab during construction, reducing structural deformation. The centerline of the uppermost steel truss 4 is set to coincide with the plane of the central axis of the composite slab body 1, so that the stress axis of the truss is completely consistent with the stress axis of the composite slab, thereby ensuring the directness of the stress transmission of the truss and the balance of the overall stress state of the composite slab, improving the stress efficiency and seismic performance of the entire installation structure, and meeting the construction and use requirements under large-span and high-load conditions.

[0029] like Figure 3 As shown, the composite slab body 1 includes a frame 11, a pouring trough 12, a support frame 13, and reinforcing ribs 14. The high strength and stability of the composite slab are achieved through a reasonable structural layout and connection method among the components. The frame 11, the main body of the composite slab body 1, is made of high-strength steel and possesses good overall rigidity and load-bearing capacity, providing a basic support structure for the composite slab. The pouring trough 12 is located inside the frame 11, serving as the forming space for subsequent on-site concrete pouring, ensuring a firm bond between the composite slab and the cast-in-place concrete, and enhancing the overall integrity and durability of the structure. The support frame 13 is installed inside the pouring trough 12, mainly used to support the side walls and bottom plate of the pouring trough 12 during construction, preventing deformation or collapse due to the weight of the concrete. The support frame 13 is fixedly connected to the pouring trough 12 by welding, ensuring its stability under stress. The reinforcing ribs 14 are also installed inside the casting trough 12 and fixed by a combination of welding and bolting. This allows the reinforcing ribs 14 to form effective support in critical stress areas, further improving the bending, shear and seismic resistance of the composite slab and ensuring its structural safety and durability in large-span applications.

[0030] High-strength concrete is poured into the casting trough 12, and the concrete is tightly bonded to the inner wall of the casting trough 12 to form an integral load-bearing structure, effectively improving the load-bearing capacity and crack resistance of the composite slab. The support frame 13 is designed with a zigzag structure. Compared with the traditional straight support method, the zigzag arrangement can evenly distribute the load under stress, enhance the support strength and deformation resistance inside the casting trough 12, and prevent structural warping or deformation caused by pressure during concrete pouring. At the same time, the reinforcing rib 14 runs through the inside of the support frame 13, effectively connecting the support frame 13 and the concrete in the casting trough 12. This means that the reinforcing rib 14 not only enhances the local load-bearing performance, but also improves the structural stability and safety of the entire composite slab under complex loads such as bending, shearing, and vibration through synergistic load-bearing with the support frame 13, thereby ensuring that the composite slab has excellent structural reliability and durability in large-span application scenarios.

[0031] like Figure 4As shown, the installation component 3 includes an installation plate 31 and a connecting block 32, which work together to achieve a high-strength connection between the composite slab and the steel truss 4. The installation plate 31 is installed on the upper surface of the composite slab body 1 and is embedded in it as a pre-embedded part during the manufacturing process of the composite slab. The installation plate 31 is firmly connected to the composite slab body 1 by concrete pouring and curing, giving it good load-bearing capacity and pull-out resistance, and effectively transferring the loads of the subsequent truss and the superstructure. The connecting block 32 is located on both sides of the installation plate 31 and is fixedly connected to the installation plate 31 by welding. The welds are evenly distributed and have high welding strength, ensuring that the connecting block 32 will not loosen or shift due to vibration or tensile stress during the stress process. This combination structure of the installation plate 31 and the connecting block 32 not only improves the accuracy and stability of the connection between the composite slab and the truss during installation, but also makes the hoisting, splicing and stress transfer in subsequent construction more efficient and reliable, meeting the construction safety and structural performance requirements of large-span structures.

[0032] like Figure 2 As shown, the fixing component 5 consists of a limiting ring 51, a support rod 52, and a connecting rod 53. Through a scientific structural layout and connection method, these components achieve a stable connection and precise positioning between the composite slab and the steel truss 4. The limiting ring 51 is installed on the upper part of the fixing component 5 and is mainly used to limit and control the position of the steel truss 4, ensuring that the truss can be accurately aligned and does not shift during installation. The upper end of the support rod 52 is connected to the lower side of the limiting ring 51, serving to bear and transfer the truss load. Its lower end is connected to the connecting rod 53, which evenly transfers the load on the truss to the composite slab body 1. One end of the connecting rod 53 is welded to the lower part of the support rod 52, and the other end is fixed to the upper surface of the mounting component 3 below by welding, forming a continuous force-bearing path for the entire fixing component 5, ensuring that the components are firmly connected and evenly stressed during installation. With the precise positioning of the limiting ring 51 and the multi-point support of the support rod 52 and the connecting rod 53, the fixing component 5 can effectively improve the structural stability and connection accuracy during the installation of the composite plate, and avoid structural loosening and misalignment caused by uneven force or vibration.

[0033] The limiting ring 51 is designed as a semi-circular structure. Compared with traditional full-circle or rectangular limiting structures, the semi-circular limiting ring 51 can not only effectively lock the bottom node of the steel truss 4, preventing lateral slippage or displacement of the truss during installation and under stress, but also disperse some of the load under stress, reducing local stress concentration in the limiting ring 51 body and extending its service life. The support rod 52 is set vertically below the limiting ring 51, directly transferring the truss load downwards through vertical force application, ensuring the stress stability and verticality of the overall structure. The connecting rod 53 adopts a composite structure design combining a 1 / 4 arc shape and a diagonal rod. The arc part can flexibly buffer the stress fluctuations between the truss and the support rod 52, reducing the impact of vibration on the connection node, while the diagonal rod part plays a role in enhancing lateral support and stabilizing the connection, so that the entire fixed component 5 can maintain good structural rigidity and stress balance under complex stress environments, thereby effectively improving the installation accuracy and structural safety of the composite plate and the truss as a whole.

[0034] In the operation of this utility model, the composite slab body 1 serves as the main load-bearing component of the entire installation structure, undertaking the primary task of transferring building loads and truss loads under stress. Through the internally designed casting groove 12 and steel mesh, the composite slab possesses excellent bending and shear resistance, ensuring good structural stiffness and overall stability in large-span applications. The distributed steel bars 2 are arranged linearly along both sides of the composite slab body 1, primarily enhancing the lateral bending and crack resistance of the composite slab. Under load, they evenly distribute local stress across the entire slab surface, preventing cracking or local deformation. Installation components 3 (installation plate 31 and connecting block 32): The installation plate 31, as a foundational connection unit tightly integrated with the composite slab body 1, forms an integral part with the composite slab through pre-embedding, serving to bear the steel truss 4 and transfer upper loads; the connecting block 32 serves as the direct support point for the steel truss 4, ensuring a secure connection between the truss and the composite slab body 1 and reliable force transfer. The steel truss 4, with its equilateral triangle three-point support layout, effectively distributes the upper load to the composite slab body 1, while enhancing the overall stiffness and stress balance of the composite slab in large-span applications, preventing structural warping or instability caused by uneven stress. The fixing components 5 (limiting ring 51, support rod 52, connecting rod 53): The limiting ring 51 precisely limits the steel truss 4, preventing it from shifting or sliding during installation and use; the support rod 52 serves as the load transfer path, ensuring stress stability; the connecting rod 53, with its 1 / 4 arc shape combined with the diagonal brace, buffers stress and enhances the overall connection rigidity, ensuring the stability and balance of the entire installation structure under stress. Through the coordinated operation of these components, this invention achieves efficient load transfer, structural stability, and seismic performance during the installation and use of the composite slab, ensuring that the large-span prestressed steel truss 4 composite slab installation structure possesses excellent stress performance and safety reliability.

[0035] Various modifications to this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein. Although one or more exemplary embodiments of this disclosure have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope of this disclosure as defined by the appended claims.

Claims

1. A large-span prestressed steel bar truss laminated slab installation structure, characterized by, It includes the composite slab body (1), distributed reinforcing bars (2), installation components (3), steel truss (4), fixing components (5) and reinforcing bars (6); The composite slab body (1) is rectangular, the distributed steel bars (2) are installed on two sides of the composite slab body (1) and the installation method is welding and riveting. The installation component (3) is installed on the top of the composite slab body (1). The steel truss (4) is installed on the top of the installation component (3). There are 3 steel trusses (4). The 3 steel trusses (4) are installed at three points in an equilateral triangle. The fixing component (5) is installed between the steel trusses (4) and the installation method is welding. The reinforcing rod (6) is installed between multiple fixing components (5). The mounting assembly (3) includes a mounting plate (31) and a connecting block (32); The mounting plate (31) is installed on the top of the composite plate body (1). The mounting plate (31) is pre-embedded on the top of the composite plate body (1). The installation method is concrete fixing. The connecting block (32) is installed on both sides of the mounting plate (31). The installation method is welding.

2. The mounting structure of a long-span prestressed steel bar truss composite slab according to claim 1, characterized in that: The distributed steel bars (2) are arranged in a linear array, and the installation components (3) are arranged in two rows, which are mirror images of the composite slab body (1). The centerline of the uppermost steel truss (4) coincides with the plane containing the central axis of the composite slab body (1).

3. The mounting structure of a long-span prestressed steel bar truss composite slab according to claim 1, characterized in that: The composite slab body (1) includes a frame (11), a casting trough (12), a support frame (13), and reinforcing ribs (14). The frame (11) is the main body of the composite plate body (1). The casting groove (12) is opened inside the frame (11). The support frame (13) is installed inside the casting groove (12) and the installation method is welding. The reinforcing rib (14) is installed inside the casting groove (12) and the installation method is welding and bolt installation.

4. The mounting structure of a long-span prestressed steel bar truss composite slab according to claim 3, characterized in that: The pouring trough (12) is filled with concrete, the support frame (13) is configured as a zigzag structure, and the reinforcing rib (14) is set through the support frame (13).

5. The mounting structure of a long-span prestressed steel bar truss composite slab according to claim 1, characterized in that: The fixing component (5) includes a limiting ring (51), a support rod (52), and a connecting rod (53); The limiting ring (51) is set as the upper part of the fixing component (5), the upper end of the support rod (52) is installed below the limiting ring (51), the upper end of the connecting rod (53) is installed at the lower end of the support rod (52), and the lower end of the connecting rod (53) is installed on the upper part of the mounting component (3). The installation method is set as welding.

6. The mounting structure of a long-span prestressed steel bar truss composite slab according to claim 5, characterized in that: The limiting ring (51) is set as a semi-circle, the support rod (52) is set vertically, and the connecting rod (53) is a combination of a 1 / 4 arc and a diagonal rod.

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