Assembly type detachable formwork beam module combined beam

Abstract

The utility model relates to the technical field of building engineering discloses a kind of assembled type exempts from dismantling formwork beam module composite beam, the composite beam includes prefabricated beam mould body and cast in situ main body poured into beam mould body, beam mould body is embedded with beam mould reinforcement net, and cast in situ main body is provided with the reinforcement cage formed by upper longitudinal reinforcement, lower longitudinal reinforcement and stirrup;Beam mould body is provided with several beam mould connecting tendons between cast in situ main body, part of beam mould connecting tendon is anchored in beam mould body, another part extends into cast in situ main body and is wrapped by cast in situ concrete.By beam mould connecting tendon between prefabricated beam mould and post-cast concrete form force connection, make beam mould body be converted from construction stage exempts from dismantling formwork to use stage stress component part, to improve composite beam interface connection reliability, overall stress performance and material utilization rate, and reduce field formwork, formwork dismantling process.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a prefabricated, non-removable formwork beam-formwork combination beam that can serve as a permanent, non-removable formwork and participate in structural stress. Background Technology

[0002] Prefabricated and modular integrated buildings typically break down the building structure into components or modules that can be prefabricated in a factory and then assembled or cast on the construction site. Compared with traditional cast-in-place construction, this type of construction method can improve the precision of component manufacturing, shorten the on-site construction cycle, reduce formwork and demolding operations, and reduce the amount of construction waste generated.

[0003] In beam construction, non-removable formwork can function as formwork during the pouring stage and remain in the structure after the concrete hardens. Existing non-removable beam formwork often focuses on the support function of the formwork itself, with the connection between the formwork and the subsequent concrete typically relying on interfacial bonding or external connectors. When the formwork is only used as an auxiliary construction component, its material is difficult to fully account for in the effective load-bearing section of the beam, and insufficient stress coordination between the formwork and the cast-in-place main structure is prone to occur.

[0004] For example, existing technologies include ultra-high performance concrete beam formwork structures that do not require formwork removal, consisting of bottom formwork, side formwork, and angle steel connectors. While this structure enables formwork to be removed without dismantling, there is still room for improvement in the overall connection between the side and bottom formwork, as well as between the formwork and the cast-in-place concrete. Under bending, shearing, or long-term loads, there is a risk of relative slippage or delamination at the interface between the formwork and the cast-in-place main structure, affecting the overall load-bearing capacity and material utilization efficiency of the composite beam.

[0005] Therefore, it is necessary to provide a prefabricated, non-removable formwork beam combination beam that can reliably connect the precast beam formwork with the cast-in-place main body and share the load without adding complicated on-site procedures. Utility Model Content

[0006] The main objective of this invention is to provide a prefabricated, non-removable formwork beam assembly, which can effectively solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A prefabricated, formwork-free composite beam includes a prefabricated beam formwork body and a cast-in-place main body formed by casting within the beam formwork body. A beam formwork reinforcement mesh is provided within the beam formwork body, and a reinforcement cage composed of upper longitudinal bars, lower longitudinal bars, and stirrups is provided within the cast-in-place main body. A plurality of beam formwork connecting bars are provided between the beam formwork body and the cast-in-place main body. Each beam formwork connecting bar has an anchoring section anchored within the beam formwork body and an extension section extending into the cast-in-place main body, thereby connecting the beam formwork body and the cast-in-place main body through the beam formwork connecting bars to form a composite beam structure that shares the load.

[0009] In one alternative embodiment, the beam formwork body is a precast concrete thin-shell component, the beam formwork body encloses a casting cavity for accommodating the reinforcing cage and the cast-in-place main body, and the beam formwork body is retained in the composite beam as a permanent, non-removable template.

[0010] In one optional embodiment, the beam formwork body includes a bottom wall and two side walls connected to the bottom wall, and the beam formwork steel mesh is embedded in the bottom wall and / or the side walls and extends along the inner wall of the beam formwork body.

[0011] In one optional embodiment, the beam formwork reinforcement mesh is formed by connecting multiple transverse and longitudinal reinforcement bars, and the anchorage section of the beam formwork connecting bar is connected to or located close to the beam formwork reinforcement mesh.

[0012] In one alternative embodiment, the stirrups are spaced apart along the length of the upper longitudinal bars and the lower longitudinal bars, and are connected with the upper longitudinal bars and the lower longitudinal bars to form a continuous steel cage skeleton.

[0013] In one alternative embodiment, several of the beam formwork connecting bars are arranged at intervals along the length direction of the composite beam, and / or arranged in layers along the height direction of the beam formwork body.

[0014] In one alternative embodiment, the extended section of the beam formwork connecting bar is located within the area enclosed by the reinforcing cage, or is connected to the reinforcing cage, and is wrapped and anchored by the cast-in-place main body after the main body is poured.

[0015] In one optional embodiment, the beam formwork connecting reinforcement is an arc-shaped reinforcement, which includes a vertical section extending along the side wall of the beam formwork body and embedded in the beam formwork body, and a transverse section formed by bending the vertical section and extending into the cast-in-place body, wherein the free end of the transverse section is bent to form a hook-shaped structure.

[0016] In one optional embodiment, the beam formwork connecting bar is a convex L-shaped bar, which includes a vertical section embedded in the beam formwork body and a horizontal section extending into the cast-in-place main body. The vertical section is provided with at least one bent portion that protrudes outward relative to the vertical section.

[0017] In one optional embodiment, the beam formwork connecting bar is a convex bow bar, which includes a vertical section embedded in the beam formwork body and a transverse section extending into the cast-in-place main body; the vertical section is provided with at least one outwardly protruding bent portion, and the free end of the transverse section is bent to form a hook-shaped structure.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This utility model connects the beam formwork body and the cast-in-place main body into a whole through beam formwork connecting bars, so that the precast beam formwork is no longer used only as a template, but can participate in the stress as part of the effective section of the composite beam; the beam formwork connecting bars form a force transmission structure at the interface, which is conducive to the transmission of interface shear force and tensile force, and reduces the risk of slippage or peeling between the beam formwork body and the cast-in-place main body.

[0020] 2. In this utility model, the beam formwork body is retained as a permanent, non-removable formwork, which reduces the on-site formwork erection, dismantling, and formwork turnover procedures, which helps to speed up the construction progress and reduce construction waste; the beam formwork connecting bars have a variety of structural forms, which can be flexibly selected according to different beam heights, spans, loads, and construction conditions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the beam-formation composite beam using convex L-shaped reinforcing bars in this utility model.

[0022] Figure 2 This is a schematic diagram of the construction of the beam-formwork composite beam using arched reinforcement according to this utility model;

[0023] Figure 3 This is a schematic diagram of the arch-shaped rib in this utility model;

[0024] Figure 4 This is a schematic diagram of the convex L-shaped rib in this utility model;

[0025] Figure 5 This is a schematic diagram of the convex arch rib in this utility model.

[0026] In the diagram: 1. Beam formwork body; 2. Cast-in-place main body; 3. Beam formwork steel mesh; 4. Upper longitudinal reinforcement; 5. Lower longitudinal reinforcement; 6. Stirrups; 7. Beam formwork connecting reinforcement; 71. Bow-shaped reinforcement; 72. Convex L-shaped reinforcement; 73. Convex bow-shaped reinforcement. Detailed Implementation

[0027] The embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be understood that the following embodiments are used to illustrate the structure and working principle of this utility model, and are not intended to limit the scope of protection of this utility model; without changing the core technical solution of this utility model, those skilled in the art can make adaptive adjustments to the specific dimensions, material grades, arrangement spacing and connection methods.

[0028] like Figures 1 to 5 As shown, the prefabricated, non-removable formwork beam composite beam of this embodiment includes a beam formwork body 1, a cast-in-place main body 2, a beam formwork steel mesh 3, a steel cage, and beam formwork connecting bars 7. The beam formwork body 1 is a prefabricated thin-shell concrete component with a casting cavity inside. The cast-in-place main body 2 is cast in the casting cavity on the construction site and, after hardening, forms a composite beam section together with the beam formwork body 1.

[0029] The beam formwork body 1 is used as a template for casting the main body 2 during the construction phase, and therefore does not need to be removed after the main body 2 reaches its design strength. Unlike ordinary temporary formwork, the beam formwork body 1 is retained in the beam component during the use phase and participates in the load-bearing with the main body 2 through the beam formwork connecting bars 7, thereby achieving the unity of the formwork function and the structural load-bearing function.

[0030] The beam formwork reinforcement mesh 3 is embedded within the beam formwork body 1. The beam formwork reinforcement mesh 3 can be formed by welding or binding multiple transverse and longitudinal reinforcing bars, and can be arranged along the bottom wall and / or side walls of the beam formwork body 1. By setting the beam formwork reinforcement mesh 3 within the beam formwork body 1, the integrity, crack resistance, and ability to resist construction loads of the beam formwork body 1 during prefabrication, transportation, hoisting, and pouring stages can be improved.

[0031] A reinforcing cage is installed within the cast-in-place main structure 2. This cage includes upper longitudinal bars 4, lower longitudinal bars 5, and stirrups 6. The upper longitudinal bars 4 are located in the upper region of the composite beam section, and the lower longitudinal bars 5 are located in the lower region of the composite beam section. The stirrups 6 are spaced along the beam length and surround or connect the upper longitudinal bars 4 and the lower longitudinal bars 5 to form a continuous reinforcing cage skeleton. During the pouring of the cast-in-place main structure 2, the concrete encases the upper longitudinal bars 4, the lower longitudinal bars 5, the stirrups 6, and the extended portions of the beam formwork connecting bars 7.

[0032] The beam formwork connecting reinforcement 7 is a key force-transmitting component connecting the beam formwork body 1 and the cast-in-place main body 2. Each beam formwork connecting reinforcement 7 includes an anchoring section anchored within the beam formwork body 1 and an overhanging section extending into the cast-in-place main body 2. The anchoring section is arranged together with the beam formwork reinforcement mesh 3 during the prefabrication of the beam formwork body 1 and is encased in precast concrete; the overhanging section is located inside the beam formwork body 1 and can extend into the area enclosed by the reinforcement cage or connect to the reinforcement cage. After the cast-in-place main body 2 is poured, the overhanging section is encased in the subsequent concrete and forms an anchor, establishing a reliable mechanical connection between the beam formwork body 1 and the cast-in-place main body 2.

[0033] The beam formwork connecting bars 7 can be arranged at intervals along the length of the composite beam to meet the interface force transmission requirements of different spans and stress sections. In locations with large beam heights or large interface shear forces, the beam formwork connecting bars 7 can also be arranged in layers along the height of the beam formwork body 1. The beam formwork connecting bars 7 can be set in one side wall of the beam formwork body 1 or in two side walls of the beam formwork body 1. When set in two side walls, the beam formwork connecting bars 7 on both sides can be arranged opposite to each other or staggered to form a stable connection with the reinforcing cage and cast-in-place concrete.

[0034] In a specific parameter example, the beam formwork body 1 can be precast using C60 concrete, and the cast-in-place body 2 can be cast using C30 concrete; the beam formwork reinforcement mesh 3 can be HRB400 grade steel mesh with a diameter of 6mm; the upper longitudinal reinforcement 4, lower longitudinal reinforcement 5, and stirrups 6 can be HRB400 grade steel bars with a diameter of 8mm to 20mm; the beam formwork connecting reinforcement 7 can be HRB400 grade steel bars with a diameter of 6mm. The above materials and dimensions are only one embodiment for illustrative purposes and should not be construed as limiting the scope of protection of this utility model.

[0035] Example 1, as Figure 1 and Figure 3 As shown, the beam formwork connecting reinforcement 7 can be an arc-shaped reinforcement 71. The arc-shaped reinforcement 71 is formed by bending steel bars, including a vertical section embedded in the side wall of the beam formwork body 1 and a transverse section bent from the vertical section and extending into the cast-in-place main body 2. The free end of the transverse section is further bent to form a hook-shaped structure.

[0036] When precasting the beam formwork 1, the vertical sections of the arched reinforcing bars 71 can be fixed to the beam formwork reinforcement mesh 3 first, for example, by spot welding, binding, or other methods that can maintain their relative positions. Then, the concrete of the beam formwork 1 is poured, so that the vertical sections are embedded and anchored inside the beam formwork 1. The transverse sections extend from the inside of the beam formwork 1 and are wrapped by the subsequent concrete when the cast-in-place main body 2 is poured on site. The hook-like structure can increase the mechanical interlocking force between the arched reinforcing bars 71 and the cast-in-place main body 2, reducing the possibility of the extended sections being pulled out.

[0037] The bow-shaped reinforcement 71 has a relatively simple structure, is easy to bend and position, and is suitable for interface connection between the beam formwork body 1 and the cast-in-place main body 2 under general stress conditions.

[0038] Example 2, as Figure 2 and Figure 4 As shown, the beam formwork connecting reinforcement 7 can be a convex L-shaped reinforcement 72. The convex L-shaped reinforcement 72 includes a vertical section embedded in the side wall of the beam formwork body 1 and a horizontal section extending into the cast-in-place main body 2. The vertical section is provided with at least one outwardly protruding bend. The bend can be convex, zigzag, or other bend shapes that can increase the anchorage path.

[0039] After the precast concrete of the beam formwork body 1 hardens, the bent portion of the convex L-shaped reinforcement 72 forms a longer mechanical interlocking path and a larger contact area with the beam formwork body 1, thereby improving the anchorage reliability of the convex L-shaped reinforcement 72 within the beam formwork body 1. For composite beams with large interface shear forces or high requirements for the anchorage performance of the precast beam formwork, this structure is beneficial to enhancing the connection strength between the beam formwork body 1 and the cast-in-place main body 2.

[0040] Example 3, as Figure 2 and Figure 5 As shown, the beam formwork connecting reinforcement 7 can also be a convex arch reinforcement 73. The convex arch reinforcement 73 includes a vertical section embedded in the side wall of the beam formwork body 1 and a horizontal section extending into the cast-in-place main body 2; the vertical section is provided with at least one outwardly protruding bent part, and the free end of the horizontal section is bent to form a hook-shaped structure.

[0041] The convex arch reinforcement 73 combines a protruding bend with a hook-like structure. Its vertical section can enhance the anchorage between itself and the beam formwork body 1 through the protruding bend, and its transverse section can enhance the anchorage between itself and the cast-in-place main body 2 through the hook-like structure at its end, thereby further enhancing the shear resistance of the interface between the beam formwork body 1 and the cast-in-place main body 2 and the overall workability.

[0042] The construction and stress-bearing processes, as well as the fabrication and assembly processes, can be carried out as follows:

[0043] First, the beam formwork reinforcement mesh 3 is fabricated in the factory, and the beam formwork connecting bars 7 are arranged according to the design position, so that the anchorage section of the beam formwork connecting bars 7 is connected to or positioned within the area to be formed of the beam formwork body 1. Then, the concrete of the beam formwork body 1 is poured and cured, so that the anchorage section of the beam formwork reinforcement mesh 3 and the beam formwork connecting bars 7 are embedded in the beam formwork body 1, while the protruding section of the beam formwork connecting bars 7 remains on the inner side of the beam formwork body 1.

[0044] Next, the prefabricated beam formwork body 1 is transported to the construction site and installed and positioned. The steel cage, consisting of upper longitudinal bars 4, lower longitudinal bars 5 and stirrups 6, is placed in the pouring cavity of the beam formwork body 1, and the position of the steel cage and the thickness of the protective layer are adjusted so that the extended section of the beam formwork connecting bar 7 extends into the area to be poured in the cast-in-place main body 2.

[0045] Next, the cast-in-place concrete for the main body 2 is poured inside the beam formwork 1. During the concrete pouring and vibration process, the cast-in-place concrete encases the reinforcing cage and the extended sections of the beam formwork connecting bars 7, and adheres to the inner surface of the beam formwork 1. After the cast-in-place main body 2 hardens, the beam formwork connecting bars 7 form a force-transferring connection between the beam formwork 1 and the cast-in-place main body 2.

[0046] When the composite beam is subjected to loads, the beam formwork body 1 and the cast-in-place main body 2 work together through the beam formwork connecting bars 7. The beam formwork connecting bars 7 can transmit shear and tensile forces at the interface and inhibit relative slippage or peeling between the beam formwork body 1 and the cast-in-place main body 2; at the same time, the beam formwork body 1 participates in the stress as part of the composite beam section, which improves the overall stiffness, crack resistance and material utilization of the beam component.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fabricated formwork beam modular composite beam, characterized in that, The structure includes a prefabricated beam formwork body (1) and a cast-in-place main body (2) formed by casting within the beam formwork body (1); a beam formwork steel mesh (3) is provided inside the beam formwork body (1), and a steel cage composed of upper longitudinal bars (4), lower longitudinal bars (5) and stirrups (6) is provided inside the cast-in-place main body (2); a number of beam formwork connecting bars (7) are provided between the beam formwork body (1) and the cast-in-place main body (2), and the beam formwork connecting bars (7) have an anchoring section anchored within the beam formwork body (1) and an extension section extending into the cast-in-place main body (2), so that the beam formwork body (1) and the cast-in-place main body (2) are connected by the beam formwork connecting bars (7) to form a composite beam structure that shares the load.

2. The prefabricated, non-removable formwork beam assembly beam according to claim 1, characterized in that, The beam formwork body (1) is a precast concrete thin-shell component. The beam formwork body (1) forms a casting cavity for accommodating the steel cage and the cast-in-place main body (2). The beam formwork body (1) is retained in the composite beam as a permanent, non-removable template.

3. The prefabricated, non-removable formwork beam assembly beam according to claim 2, characterized in that, The beam formwork body (1) includes a bottom wall and two side walls connected to the bottom wall. The beam formwork steel mesh (3) is embedded in the bottom wall and / or the side walls and extends along the inner wall of the beam formwork body (1).

4. The prefabricated, non-removable formwork beam assembly beam according to claim 1, characterized in that, The beam formwork reinforcement mesh (3) is formed by connecting multiple transverse and longitudinal reinforcement bars. The anchorage section of the beam formwork connecting bar (7) is connected to or located close to the beam formwork reinforcement mesh (3).

5. The prefabricated, non-removable formwork beam assembly according to claim 1, characterized in that, The stirrups (6) are spaced apart along the length of the upper longitudinal bar (4) and the lower longitudinal bar (5), and are connected with the upper longitudinal bar (4) and the lower longitudinal bar (5) to form a continuous steel cage skeleton.

6. The prefabricated, non-removable formwork beam assembly according to claim 1, characterized in that, Several of the beam formwork connecting bars (7) are arranged at intervals along the length direction of the composite beam and / or arranged in layers along the height direction of the beam formwork body (1).

7. The prefabricated, non-removable formwork beam assembly beam according to claim 1, characterized in that, The extended section of the beam formwork connecting bar (7) is located within the area enclosed by the steel cage, or is connected to the steel cage, and is wrapped and anchored by the cast-in-place main body (2) after the cast-in-place main body (2) is poured.

8. The prefabricated, non-removable formwork beam assembly according to any one of claims 1 to 7, characterized in that, The beam formwork connecting bar (7) is an arc-shaped bar (71). The arc-shaped bar (71) includes a vertical section extending along the side wall of the beam formwork body (1) and embedded in the beam formwork body (1), and a horizontal section formed by bending the vertical section and extending into the cast-in-place body (2). The free end of the horizontal section is bent to form a hook-shaped structure.

9. The prefabricated, non-removable formwork beam assembly according to any one of claims 1 to 7, characterized in that, The beam formwork connecting bar (7) is a convex L-shaped bar (72). The convex L-shaped bar (72) includes a vertical section embedded in the beam formwork body (1) and a horizontal section extending into the cast-in-place body (2). The vertical section is provided with at least one bent portion that protrudes outward relative to the vertical section.

10. The prefabricated, non-removable formwork beam assembly according to any one of claims 1 to 7, characterized in that, The beam formwork connecting bar (7) is a convex bow bar (73). The convex bow bar (73) includes a vertical section embedded in the beam formwork body (1) and a horizontal section extending into the cast-in-place body (2). The vertical section is provided with at least one outwardly protruding bent part, and the free end of the horizontal section is bent to form a hook-shaped structure.

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