Suspended large-span structural beam combined type steel formwork platform

Abstract

The utility model provides a suspended large-span structural beam combined profile steel formwork platform. The suspended large-span structural beam combined profile steel formwork platform comprises a profile steel frame set and a cantilever profile steel frame set. The profile steel frame set comprises first profile steel and second profile steel. The overhanging type steel frame group comprises a plurality of pieces of overhanging type steel; each piece of overhanging profile steel is connected with the first profile steel and the second profile steel through a bolt assembly, and each piece of overhanging profile steel is partially overhung and located outside the profile steel frame set; the protective frame and the formwork supporting frame are erected on the cantilever type steel frame set; and each piece of cantilever profile steel is provided with an anti-sliding device for positioning the protective frame and the formwork support. According to the construction method, the combined profile steel suspended formwork erecting construction technology is adopted, compared with a traditional formwork erecting system, the structure is simple, stress is reasonable, the structure is stable, the technical problem faced by construction of a suspended beam structure at the ultrahigh position is solved, and the construction method is successfully applied to engineering practice; the method fully proves that the method has the advantages of definite stress, safety, reliability, simple process, short construction period, high recovery rate, economy, reasonability, cost reduction and the like.

Description

Technical Field

[0001] The present application relates to the technical field of suspended large-span structural beam construction, and in particular to a suspended large-span structural beam combined steel formwork platform. Background Art

[0002] Nowadays, with the improvement of aesthetics, the public has higher and higher requirements for the appearance of buildings, especially the shape of the top of high-rise buildings, such as Figure 1 As shown in the figure, after the construction of the building bodies 300 on both sides is completed, they usually include a structural beam 600 suspended in the air. The construction of the structural beam 600 mostly adopts a ground scaffolding formwork system or a cantilevered steel formwork system. However, the formwork height of the ground scaffolding formwork system is limited by the deadweight of the formwork frame, which is not suitable for construction on the upper floors of high-rise buildings. The cantilevered steel formwork system has the disadvantages of being difficult to install and disassemble, having a long construction period, and having a limited construction span. Both of them are difficult to meet the construction formwork requirements of structural beams with cantilever spans. Summary of the invention

[0003] The present application provides a combined steel formwork platform for suspended large-span structural beams, which can adapt to the construction formwork requirements of structural beams with cantilever spans, has the advantages of no restrictions on operating height, span, and size, clear and reliable structural force transmission, simple process, short construction period, high recovery rate, and low cost.

[0004] The present application provides a suspended large-span structural beam combined steel formwork platform, which comprises a steel frame group connected between two building bodies, and a cantilever steel frame group connected to the steel frame group;

[0005] The steel frame group includes a first steel section and a second steel section;

[0006] The cantilevered steel frame group includes a plurality of cantilevered steel sections arranged at intervals along the length direction of the first steel section and the second steel section; each of the cantilevered steel sections is connected to the first steel section and the second steel section by a bolt assembly, and each of the cantilevered steel sections is partially cantilevered and located outside the steel frame group;

[0007] The suspended large-span structural beam combined steel formwork platform also includes a protection frame and a formwork frame erected on the cantilever steel frame group;

[0008] Each of the cantilevered steel sections is provided with an anti-slip device for positioning the protection frame and the formwork frame.

[0009] In this application, the combined steel formwork platform for suspended large-span structural beams uses the height of the buildings on both sides as the formwork foundation, and the steel frame set between the buildings on both sides as the bottom frame, which solves the technical difficulties faced by the construction of super-high, large-span, and large-size suspended beam structures. Compared with the traditional formwork system, it has a simpler structure, reasonable force transmission, and stable structure. It has been successfully applied in engineering practice, providing an ideal working height for the construction of suspended large-span structural beams, and the formwork platform structure has clear and reliable force transmission, the formwork platform erection process is simple, the construction period is short, the material recovery rate is high, and the cost of platform erection is reasonably reduced, which meets the construction period requirements of large-scale projects. While ensuring safety, it has high technical and economic feasibility.

[0010] In a specific implementation scheme, the first steel and the second steel are arranged parallel to each other, and the second steel is located outside the first steel. The parallel installation is carried out by hoisting, and the force is more stable.

[0011] In a specific implementation manner, both ends of the first steel section and the second steel section are welded and connected to the building bodies on both sides, or;

[0012] The two ends of the first steel section and the second steel section are connected to the buildings on both sides by bolts, so that both the first steel section and the second steel section have a detachable installation mode, thereby realizing the reuse efficiency of the platform.

[0013] In a specific possible implementation scheme, each of the cantilevered steel sections is cross-connected with the first steel section and the second steel section. The installed force-bearing structure is stable.

[0014] In a specific possible implementation, the first steel and the second steel are both provided with rectangular bolt hole groups equidistantly spaced along their length direction, a steel plate is welded to the bottom surface of each cantilever steel, and each steel plate is provided with through holes corresponding to and coinciding with the bolt hole groups. The through holes of the steel plates are overlapped with the corresponding bolt hole groups and then locked and installed by bolt assemblies, which can effectively achieve the convenience of disassembly and assembly.

[0015] In a specific embodiment, the first steel, the second steel and the plurality of cantilever steels are all I-beams. The first steel and the second steel are 45b I-beams, and the plurality of cantilever steels are 16 I-beams.

[0016] In a specific possible implementation, the anti-slip device is a plurality of steel bars welded on the upper surface of each cantilever steel, which effectively prevents the displacement of the protective frame and the formwork frame.

[0017] In a specific possible implementation scheme, the protection frame includes: a sweeping frame group erected on a plurality of the cantilevered steel sections, and a protection upright frame group connected to the sweeping frame group;

[0018] The sweeping frame group is blocked and limited in movement by the anti-slip device, the sweeping frame group and the protective pole frame group are connected by fasteners, and a scaffolding board is laid on the sweeping frame group. The sweeping frame group, the protective pole frame group, etc. are all connected by fasteners to form a firm overall protective structure.

[0019] In a specific possible implementation scheme, the top of the protective upright pole is circumferentially connected with a tie rod, and fasteners are used to connect the tie rods to enhance the overall protection strength.

[0020] In a specific possible implementation scheme, the formwork frame includes: a beam bottom support frame connected to the plurality of cantilevered steel sections, a bottom form assembled on the beam bottom support frame, and side forms relatively arranged on both sides of the bottom form;

[0021] The opposite side forms are connected by through bolts. After the support formwork of the large-span structural beam is completed, the concrete is poured after the steel bars are tied, and the formwork is removed after the concrete is completely solidified. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a structural beam in the prior art;

[0023] Figure 2 A top view of a steel frame group and a cantilever steel frame group provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of a suspended large-span structural beam combined steel formwork platform provided in an embodiment of the present application;

[0025] Figure 4 A top view of a combined steel formwork platform for suspended large-span structural beams provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the structure of the cantilever steel provided in the embodiment of the present application;

[0027] Figure 6 A schematic diagram of the structure of a steel frame group provided in an embodiment of the present application;

[0028] Figure 7 A side view of a suspended large-span structural beam composite steel formwork platform provided in an embodiment of the present application.

[0029] Figure Number:

[0030] The first steel section -100, the second steel section -110, the bolt hole group -111, the cantilever steel section -200, the steel plate -210, the through hole -211, the steel column -220, the building body -300, the sweeping frame group -400, the protective pole frame group -410, the tie rod -420, the beam bottom support frame -500, the bottom formwork -510, the side formwork -520, the through bolts -530, and the structural beam -600. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0032] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of this specification should be understood by people with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in one or more embodiments of this specification do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] In order to facilitate understanding of the suspended large-span structural beam composite steel formwork platform provided in the embodiment of the present application, its application scenario is first explained. First of all, it needs to be specifically explained that the suspended large-span structural beam composite steel formwork platform in the present application is applied in the field of suspended large-span structural beam construction technology.

[0034] Nowadays, with the improvement of aesthetics, the public has higher and higher requirements for the appearance of buildings, such as Figure 1 As shown in the figure, after the construction of the building bodies 300 on both sides is completed, they usually include a structural beam 600 suspended in the air. The construction of the structural beam 600 mostly adopts a ground scaffolding formwork system or a cantilevered steel formwork system. However, the formwork height of the ground scaffolding formwork system is limited by the deadweight of the formwork frame, which is not suitable for construction on the upper floors of high-rise buildings. The cantilevered steel formwork system has the disadvantages of being difficult to install and disassemble, having a long construction period, and having a limited construction span. Both of them are difficult to meet the construction formwork requirements of structural beams with cantilever spans.

[0035] In view of this, the present application provides a suspended large-span structural beam combined steel formwork platform, which has the advantages of clear force, safety and reliability, simple process, short construction period, high recovery rate, economic rationality and reduced costs.

[0036] refer to Figure 1 and Figure 2 As shown in , the suspended large-span structural beam combined steel formwork platform provided in the embodiment of the present application is applied to a certain project, in which the maximum slab top elevation of the residential building is 104.9 meters, and the port-type structural beam 600 on the roof of the building 300 on both sides has a maximum cross-sectional size of 200×600mm and a maximum span of 10.4m. The maximum span of the cantilever structure of the building relative to the roof is greater than 10m, the height of the construction work from the ground is greater than 100m, and the cantilever length is greater than 2.5 meters. The building system cannot be constructed using conventional cantilever steel scaffolding. Figure 1 It is a structural diagram after the construction of the structural beam 600 is completed. The suspended large-span structural beam combined steel formwork platform is a formwork platform for the construction of the structural beam 600.

[0037] Continue reading Figure 3 As shown in the figure, the suspended large-span structural beam combined steel formwork platform includes a steel frame group connected between the two side buildings 300, and a cantilevered steel frame group connected to the steel frame group; the steel frame group is horizontally connected to the two side buildings 300, and is supported and stabilized by welding or bolting, the cantilevered steel frame group is longitudinally laid on the steel frame group, and the cantilevered steel frame group is cantilevered to increase the protection area, and a large activity space is reserved in the later protection and formwork process to ensure a strong and stable support effect.

[0038] The steel frame group includes a first steel 100 and a second steel 110. In a specific embodiment of the present application, the first steel 100 and the second steel 110 are 45b I-beams. The first steel 100 and the second steel 110 are arranged parallel to each other, and the second steel 110 is located outside the first steel 100. The parallel installation is carried out by hoisting, and the force is more stable.

[0039] The first steel 100 and the second steel 110 are welded to the building bodies 300 at both sides; Figure 3 As shown in the figure, when the welding connection method is adopted, steel plates are embedded on the building bodies 300 on both sides, and welding is performed after the two ends of the first steel section 100 and the second steel section 110 overlap with the steel plates on the building bodies 300 on both sides. When dismantling at a later time, a grinder or gas cutting is used to grind the welding parts and then the first steel section 100 and the second steel section 110 are removed.

[0040] In addition, the first steel section 100 and the second steel section 110 in the present application are connected to the building bodies 300 on both sides by bolts. By pre-embedding bolts on the building bodies 300 on both sides and opening bolt holes corresponding to the bolts at both ends of the first steel section 100 and the second steel section 110, the first steel section 100 and the second steel section 110 are both provided with a detachable installation method, thereby realizing the reuse efficiency of the platform components.

[0041] Combination Figure 5 and Figure 6 As shown in , the cantilevered steel frame group includes a plurality of cantilevered steels 200 arranged at intervals along the length direction of the first steel 100 and the second steel 110; each cantilevered steel 200 is connected to the first steel 100 and the second steel 110 by a bolt assembly, and each cantilevered steel 200 is partially cantilevered outside the steel frame group; the plurality of cantilevered steels 200 use No. 16 I-beams. Moreover, each cantilevered steel 200 is cross-connected with the first steel 100 and the second steel 110. The installed force-bearing structure is stable.

[0042] When the cantilever steel 200 is stably connected to the first steel 100 and the second steel 110, the first steel 100 and the second steel 110 are provided with a rectangularly distributed bolt hole group 111 along their length direction. The bolt hole group 111 is arranged on the upper flange plate of the first steel 100 and the second steel 110, and each bolt hole group 111 includes four rectangularly distributed bolt holes. Two steel plates 210 are welded on each cantilever steel 200, and four rectangularly distributed through holes 211 are provided on each steel plate 210. Thus, the two steel plates 210 on each cantilever steel 200 are overlapped on the first steel 100 and the second steel 110, and the through holes 211 on each steel plate 210 are overlapped with the corresponding bolt hole group 111. After the four through holes 211 are overlapped with the four bolt holes, the bolt assembly is passed through to achieve locking and fixing. Of course, in other embodiments of the present application, a steel plate with holes may be welded on the upper flanges of the first steel section 100 and the second steel section 110 to match the steel plate with holes welded on the bottom surface of the cantilever steel section 200 to achieve installation of the bolt assembly.

[0043] Combination Figure 7 As shown in the figure, the suspended large-span structural beam combined steel formwork platform also includes a protection frame and a formwork frame set up on the cantilever steel frame group; each cantilever steel 200 is provided with an anti-slip device for positioning the protection frame and the formwork frame. The anti-slip device is a plurality of steel bars 220 welded on the upper surface of each cantilever steel 200. It effectively prevents the displacement of the protection frame and the formwork frame.

[0044] In addition, the protective frame includes: a sweeping frame group 400 erected on multiple cantilevered steel sections 200, and a protective pole frame group 410 connected to the sweeping frame group 400; the sweeping frame group 400 is blocked and limited by an anti-slip device, the sweeping frame group 400 and the protective pole frame group 410 are connected by fasteners, and scaffolding boards are laid on the sweeping frame group 400. The sweeping frame group 400, the protective pole frame group 410, etc. are all connected by fasteners to form a solid overall protective structure. The top of the protective pole is circumferentially connected with a tie rod 420. The tie rod is connected with fasteners to enhance the overall protective strength. The sweeping frame group 400 in the present application is connected to multiple cantilevered steel sections 200 by fasteners, and scaffolding boards are laid on multiple cantilevered steel sections 200 to facilitate workers to operate.

[0045] The formwork frame includes: a beam bottom support frame 500 connected to a plurality of cantilevered steels 200, a bottom form 510 assembled on the beam bottom support frame 500, and side forms 520 arranged on both sides of the bottom form 510; through bolts 530 are connected between the oppositely arranged side forms 520. After the support formwork of the large-span structural beam is completed, concrete is poured after tying the steel bars, and the formwork is removed in sequence after the concrete is completely solidified.

[0046] First, the side formwork 520 is removed. The formwork can be removed only after the concrete strength ensures that its surface and edges are not damaged by removing the formwork. The formwork removal construction is carried out in accordance with the relevant standards in this field. After the side formwork 520 is removed, the bottom formwork 510 is removed, and the formwork frame and combined steel are removed in turn. The steel should be removed first by removing the upper cantilever steel 200, and then removed symmetrically from the middle to both sides. Finally, the first steel 100 and the second steel 110 are removed and hoisted to the designated location for easy recycling.

[0047] It uses the 300-story rooftops of the buildings on both sides as the formwork foundation, and sets up a steel frame group between the two high buildings as the bottom frame group, providing an ideal working height for the construction of suspended large-span structural beams, and solving the technical difficulties faced in the construction of ultra-high, large-span, and large-size suspended beam structures.

[0048] In this embodiment, the suspended large-span structural beam combined steel formwork platform is successfully applied to the construction of suspended large-span structural beams with a maximum cross-sectional size of 200×600mm and a maximum beam span of 10.4m required for the roof shaping of a residential building with a maximum plate top elevation of 104.9 meters. The material processing cost of a single construction is reduced by 40% compared with the existing technology, and the labor construction cost is reduced by 33% compared with the existing technology. In addition, the steel and formwork disassembled and recycled in this embodiment can be used multiple times. Compared with the existing technology, the construction time is reduced. It meets the construction period requirements of this large-scale project, and has high technical and economic feasibility while ensuring safety.

[0049] The combined steel formwork platform for suspended large-span structural beams in the present application uses the high places of the buildings on both sides as the formwork foundation, and the steel frame group set up between the buildings on both sides as the bottom frame group, which solves the technical problems faced by the construction of super-high, large-span and large-size suspended beam structures. Compared with the traditional formwork system, it has a simpler structure, reasonable force transmission and stable structure. It has been successfully applied in engineering practice, providing an ideal working height for the construction of suspended large-span structural beams, and the formwork platform structure has clear and reliable force transmission, simple formwork platform erection process, short construction period, high material recovery rate, and reasonable reduction in the cost of platform erection, meeting the construction period requirements of large-scale projects, and having high technical and economic feasibility while ensuring safety. Ordinary technicians in the relevant field should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present disclosure (including claims) is limited to these examples; under the idea of ​​the present disclosure, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of one or more embodiments of the present specification as above, which are not provided in detail for the sake of simplicity.

[0050] In addition, to simplify the description and discussion, and in order not to obscure one or more embodiments of the present specification, known power / ground connections of other components may or may not be shown in the provided figures. In addition, devices may be shown in the form of block diagrams to avoid obscuring one or more embodiments of the present specification, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which one or more embodiments of the present specification will be implemented (i.e., these details should be fully within the scope of understanding of those skilled in the art). Where specific details are set forth to describe exemplary embodiments of the present disclosure, it is apparent to those skilled in the art that one or more embodiments of the present specification may be implemented without these specific details or with variations in these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0051] One or more embodiments of this specification are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification should be included in the scope of protection of this disclosure.

Claims

1. A suspended large-span structural beam combined steel formwork platform, comprising a steel frame group connected between two building bodies, and a cantilever steel frame group connected to the steel frame group; characterized in that: The steel frame group includes a first steel section and a second steel section; The cantilevered steel frame group includes a plurality of cantilevered steel sections arranged at intervals along the length direction of the first steel section and the second steel section; each of the cantilevered steel sections is connected to the first steel section and the second steel section by a bolt assembly, and each of the cantilevered steel sections is partially cantilevered and located outside the steel frame group; The suspended large-span structural beam combined steel formwork platform also includes a protection frame and a formwork frame erected on the cantilever steel frame group; Each of the cantilevered steel sections is provided with an anti-slip device for positioning the protection frame and the formwork frame.

2. The suspended large-span structural beam combined steel formwork platform according to claim 1 is characterized in that: The first section steel and the second section steel are arranged parallel to each other, and the second section steel is located outside the first section steel.

3. The suspended large-span structural beam combined steel formwork platform according to claim 2 is characterized in that: Both ends of the first steel section and the second steel section are welded to the building bodies at both sides, or; Both ends of the first steel section and the second steel section are connected to the building bodies on both sides by bolts.

4. The suspended large-span structural beam combined steel formwork platform according to claim 3 is characterized in that: Each of the cantilevered steel sections is cross-connected with the first steel section and the second steel section.

5. The suspended large-span structural beam combined steel formwork platform according to claim 1 is characterized in that: The first steel section and the second steel section are both provided with rectangularly distributed bolt hole groups equidistantly spaced along their length direction, the bottom surface of each cantilever steel section is welded to a steel plate, and each steel plate is provided with through holes that correspond to and overlap with the bolt hole groups one by one.

6. The suspended large-span structural beam combined steel formwork platform according to claim 5 is characterized in that: The first steel section, the second steel section and the plurality of cantilever steel sections are all I-beams.

7. The suspended large-span structural beam combined steel formwork platform according to claim 6 is characterized in that: The anti-slip device is a plurality of steel bars welded on the upper surface of each cantilever steel section.

8. The suspended large-span structural beam combined steel formwork platform according to claim 7 is characterized in that: The protection frame comprises: a sweeping frame group erected on a plurality of cantilevered steel sections, and a protection upright frame group connected to the sweeping frame group; The sweeping frame group is blocked and limited in movement by the anti-slip device, the sweeping frame group and the protective upright pole frame group are connected by fasteners, and a scaffolding board is laid on the sweeping frame group.

9. The suspended large-span structural beam combined steel formwork platform according to claim 8, characterized in that: The top of the protective upright pole is circumferentially connected with a tie rod.

10. The suspended large-span structural beam combined steel formwork platform according to claim 8, characterized in that: The formwork frame comprises: a beam bottom support frame connected to the plurality of cantilevered steel sections, a bottom form assembled on the beam bottom support frame, and side forms arranged on both sides of the bottom form; The side molds that are arranged opposite to each other are connected with through bolts.

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