Prefabricated concrete beam-slab connecting node free of mold and installation support

Abstract

The utility model discloses a prefabricated concrete beam-slab connecting node free of a mold and an installation support, which comprises a prefabricated laminated beam and a laminated slab, the prefabricated superposed beam is configured to be an inverted trapezoidal section which gradually extends outwards towards the two sides of the prefabricated superposed beam in the height direction of the prefabricated superposed beam from the bottom of the prefabricated superposed beam to the connecting face, matched with the superposed plate, of the prefabricated superposed beam. Connecting bosses are formed at the two ends of the connecting face, matched with the laminated slab, of the prefabricated laminated beam, and the laminated slab can be erected on the connecting bosses at the two ends correspondingly; the prefabricated composite beam is configured to have the inverted trapezoidal section, so that the connecting bosses are formed at the two ends of the connecting surface, matched with the composite slab, of the prefabricated composite beam, the composite slab can be directly erected on the connecting bosses, and the composite slab is supported through the connecting bosses, so that mounting and dismounting of a temporary mounting support are omitted, construction cost is saved, construction is simple, and construction efficiency is improved. And the efficiency is high.

Description

Technical Field

[0001] The utility model relates to the field of construction engineering, in particular to a prefabricated concrete beam-slab connection node. Background Art

[0002] Prefabricated buildings refer to buildings that are partially or completely prefabricated in factories, such as beams and columns, and then transported to the construction site by appropriate means of transportation. Reliable installation methods and installation machinery are used to assemble the components to form a functional building. Prefabricated buildings have the advantages of high construction efficiency, short construction period, and reduced construction noise and dust pollution, and are widely used in the construction industry.

[0003] In traditional prefabricated buildings, when installing prefabricated composite beams and composite panels, in order to stably erect the composite panels on the prefabricated composite beams, temporary installation supports are set at the connection nodes of the prefabricated composite beams and composite panels to assist in the stable connection between the prefabricated composite beams and the composite panels. After the concrete is poured in place, the temporary installation supports are removed. However, the traditional prefabricated composite beam-slab connection nodes will lead to complex construction, high construction costs, and extended construction periods.

[0004] Therefore, how to simplify the construction of prefabricated composite beam-slab connection nodes, improve construction efficiency and reduce construction costs has become an urgent problem to be solved in this field. Utility Model Content

[0005] In view of the defects of the prior art, the purpose of the utility model is to provide a precast concrete beam-slab connection node which is simple to construct, low in cost and high in efficiency and does not require formwork or installation support.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a prefabricated concrete beam-slab connection node without formwork and installation support, including a prefabricated composite beam and a composite slab.

[0007] The prefabricated composite beam is configured such that the bottom of the prefabricated composite beam to the connecting surface where the prefabricated composite beam cooperates with the composite plate presents an inverted trapezoidal cross-section that gradually extends outward toward both sides of the prefabricated composite beam along the height direction of the prefabricated composite beam, so that connecting bosses are formed at both ends of the connecting surface where the prefabricated composite beam cooperates with the composite plate, and the composite plate can be respectively placed on the connecting bosses at both ends.

[0008] Furthermore, height-adjusting pads are provided between the connecting bosses at both ends of the connecting surface and the composite plates respectively.

[0009] Furthermore, the height adjustment pads respectively arranged on the connection bosses at both ends of the connection surface can be configured to have the same height or different heights.

[0010] Furthermore, a keyway is provided in a middle area of ​​the connecting surface.

[0011] Furthermore, the keyway is formed by a square groove or a trapezoidal groove on the connecting surface.

[0012] Furthermore, the composite slab includes a prefabricated slab and a cast-in-place layer, and the prefabricated slab is provided with connecting steel bars, which extend out of the composite slab and pass through a middle area of ​​the connecting surface.

[0013] Furthermore, truss steel bars are provided in the cast-in-place layer, and the truss steel bars are evenly distributed on the prefabricated panels.

[0014] Furthermore, the prefabricated composite beam is provided with beam stirrups, and the beam stirrups extend from the bottom of the prefabricated composite beam to the outside of the connection surface.

[0015] The precast concrete beam-slab connection node which is free of formwork and installation support provided by the utility model configures the precast composite beam into an inverted trapezoidal cross-section so that connecting bosses are formed at both ends of the connecting surface between the precast composite beam and the composite board. The composite board can be directly erected on the connecting bosses, and the composite board is supported by the connecting bosses, thereby eliminating the need for installation and removal of temporary installation supports. At the same time, the ends of the composite board and the precast composite beam are abutted to form a closure, thereby eliminating the need for installation and removal of formwork, saving construction costs, and having simple construction and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and specific implementations.

[0017] Figure 1 This is a front cross-sectional view of a precast concrete beam-slab connection node that is free of formwork and installation support provided by the utility model;

[0018] Figure 2 A top view of the precast concrete beam-slab connection node without formwork or installation support provided by the utility model;

[0019] Reference numerals:

[0020] 1. Prefabricated composite beam; 11. Connection surface; 12. Connection boss; 13. Bottom; 14. Inclined surface; 15. Height adjustment pad; 16. Beam stirrups; 17. Keyway;

[0021] 2. Composite slab; 21. Connection end; 22. Precast slab; 221. Slab bottom reinforcement; 23. Cast-in-place layer; 231. Truss reinforcement. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0023] See also Figure 1 and Figure 2 , which shows an example of a precast concrete beam-slab connection node provided by the utility model that is free of formwork and installation support.

[0024] As can be seen from the figure, the precast concrete beam-slab connection node without formwork and installation support in this example mainly includes a precast composite beam 1 and a composite slab 2.

[0025] A connecting boss 12 that can support the composite plate 2 is provided on the connecting surface 11 of the prefabricated composite beam 1 and the composite plate 2, so that when the composite plate 2 is connected to the prefabricated composite beam 1, the connecting end 21 of the composite plate 2 can be directly placed on the connecting boss 12, and the composite plate 2 is supported by the connecting boss 12, so that the prefabricated composite beam 1 and the composite plate 2 are firmly connected, eliminating the installation and removal of temporary installation supports. At the same time, the ends of the composite plate 2 and the prefabricated composite beam 2 are abutted to form a closure, eliminating the installation and removal of the template, thereby improving construction efficiency.

[0026] Specifically, the prefabricated composite beam 1 is configured such that the bottom 13 of the prefabricated composite beam 1 to the connecting surface 11 presents an inverted trapezoidal cross-section that gradually extends outward toward both sides of the prefabricated composite beam 1 along the height direction of the prefabricated composite beam 1, so that the area of ​​the connecting surface 11 is larger than the surface area of ​​the bottom 13, and extends and protrudes toward both outer sides of the prefabricated composite beam 1 relative to the bottom 13, and connecting bosses 12 are formed at both ends of the connecting surface 11, so that the connecting bosses 12 can be used to support the composite plate 2.

[0027] Therefore, the connecting ends 21 of the composite plates 2 on both sides of the prefabricated composite beam 1 can be respectively placed on the connecting bosses 12 at both ends of the connecting surface 11, and the connecting bosses 12 can support the composite plates 2. At the same time, the two ends of the composite plates 2 are respectively placed on two adjacent prefabricated composite beams 1, and the connecting bosses 12 on the two adjacent prefabricated composite beams 1 can cooperate to support the two ends of the composite plates 2 and ensure that the composite plates 2 are level, so that the connection between the composite plates 2 and the prefabricated composite beams 1 is stable, eliminating the installation and removal of temporary installation supports.

[0028] Here, the connecting bosses 12 at both ends of the connecting surface 11 preferably extend 50 mm toward the two outer sides of the prefabricated composite beam 1 relative to the edge line of the bottom 13, so that the connecting bosses 12 can both support the composite plate 2 and abut against the composite plate 2, eliminating the need for installation and removal of the formwork, and at the same time will not affect the overall structure of the prefabricated composite beam 1, causing the strength of the prefabricated composite beam 1 to be affected.

[0029] Furthermore, since the connecting surface 11 extends along both sides of the prefabricated composite beam 1 to form a connecting boss 12, the connecting surface 11 cooperates with the bottom 13 to make the two sides of the prefabricated composite beam 2 form an inclined surface 14, so that when the prefabricated composite beam 1 is prefabricated in the factory, the templates on the inclined surfaces 14 on both sides of the prefabricated composite beam 1 are also inclined. When the prefabricated prefabricated composite beam 1 is completed and the template is removed, the inclined surface 14 can reduce the friction between the template and make it easy for the template to slide along the inclined surface 14, thereby quickly removing the template.

[0030] In order to prevent the composite plate 2 from being unable to remain horizontal and tilting when the connecting end 21 of the composite plate 2 is erected on the prefabricated composite beam 1 through the connecting boss 12, thereby causing an unstable connection between the prefabricated composite beam 1 and the composite plate 2, a height adjustment pad 15 is provided between the connecting boss 12 and the composite plate 2.

[0031] Furthermore, a height adjustment pad 15 is arranged on the connecting boss 12, and is preferably composed of a cement mortar pad to facilitate adjustment of the height of the height adjustment pad 15 itself, so that the height adjustment pad 15 can cooperate with the composite plate 2 and the connecting boss 12 to adjust the height of the composite plate 2 on the prefabricated composite beam 1, so that the composite plate 2 and the top of the prefabricated composite beam 1 are flush, thereby improving the stability and flatness of the connection node.

[0032] Here, the height adjustment pads 15 respectively arranged on the connecting bosses 12 at both ends of the connecting surface 11 can be set to different heights according to specific circumstances, so that the height adjustment pads 15 at both ends can respectively abut against the connecting ends 21 of the composite plates 2 on both sides of the prefabricated composite beam 1, and adjust the heights of the composite plates 2 on both sides so that the composite plates 2 on both sides remain level with the prefabricated composite beam 1.

[0033] In some embodiments, height adjustment pads 15 are arranged at the two ends of the connecting boss 12 in the matching area with the composite plate 2 along the length direction of the prefabricated composite beam 1, so that the height adjustment pads 15 are connected to the two side ends of the composite plate 2, and the erection height of the two sides of the composite plate 2 is adjusted to ensure the overall level of the composite plate 2.

[0034] In some embodiments, a plurality of height adjustment pads 15 are evenly distributed in the matching area between the connecting boss 12 and the composite plate 2 along the length direction of the prefabricated composite beam 1, so as to increase the contact area between the composite plate 2 and the height adjustment pads 15, so that the load of the composite plate 2 is evenly distributed on the prefabricated composite beam 1, thereby ensuring balanced force on the prefabricated composite beam 1 and thus ensuring the structural safety of the building.

[0035] Furthermore, the prefabricated composite beam 1 is provided with beam stirrups 16 to meet the load-bearing requirements of the prefabricated composite beam 1. The beam stirrups 16 extend from the bottom 13 of the prefabricated composite beam 1 to the outside of the connecting surface 11 so that the beam stirrups 16 cooperate with the composite plate 2 to firmly connect the prefabricated composite beam 1 and the composite plate 2.

[0036] The composite plate 2 includes a precast plate 22 and a cast-in-place layer 23 arranged on the precast plate 22. The cast-in-place layer 23 is provided with a truss steel bar 231, which is evenly distributed on the precast plate 22 and is flush with the beam stirrups 16 of the precast composite beam 1. The precast plate 22 is provided with a plate bottom bar 221, which extends out of the precast plate 22 so that when the connection end 21 of the composite plate 2 is placed on the connection boss 12 of the connection surface 11 of the precast composite beam 1, the plate bottom bar 221 in the precast plate 22 is 21 extends out and passes through the middle of the connecting surface 11, so that when the cast-in-place layer 23 of the composite slab 2 and the connecting node of the precast composite beam 1 and the composite slab 2 are cast in-place, the ends of the composite slab 2 and the precast composite beam 1 are abutted to form a closure, thereby eliminating the need for installation and removal of the formwork, and the cast-in-place concrete can connect the connecting surface 11 of the precast composite beam 1 and the connecting end 21 of the composite slab 2. At the same time, the beam stirrups 16 of the precast composite beam 1 cooperate with the truss steel bars 231 and the slab bottom bars 221 of the composite slab 2 to improve the strength of the connecting node.

[0037] In coordination with this, a key groove 17 is provided in the middle area of ​​the connection surface 11 of the prefabricated composite beam 1, so that when pouring concrete in situ, the connection area between the slab bottom reinforcement 221 and the concrete and the connection surface 11 is increased, so that the slab bottom reinforcement 221 is tightly connected to the connection surface 11, thereby improving the connection strength, thereby improving the overall stiffness and bearing capacity of the connection node between the prefabricated composite beam 1 and the composite plate 2.

[0038] Furthermore, the key groove 17 may be formed by a square groove or a trapezoidal groove in the middle of the connecting surface 11 .

[0039] The following examples illustrate the working process of the present invention in a specific application. It should be noted that the following content is only a specific application example of the present solution and does not constitute a limitation to the present solution.

[0040] The connection end 21 of the composite plate 2 is mounted on the connection boss 12 of the connection surface 11 of the prefabricated composite beam 1. The connection boss 12 supports the composite plate 2, eliminating the need for installation and removal of temporary installation supports.

[0041] At the same time, the height adjustment pad 15 is arranged between the connecting boss 12 and the composite plate 2 to adjust the height of the composite plate 2 on the prefabricated composite beam 1 so that the composite plate 2 and the prefabricated composite beam 1 remain level, thereby improving the stability and flatness of the connection node.

[0042] At this time, the bottom reinforcement 221 of the composite slab 2 extends out of the precast slab 22 and passes through the middle of the connecting surface 11, and the cast-in-place layer 23 of the composite slab 2, the precast composite beam 1 and the connecting node of the composite slab 2 are cast in-place. The cast-in-place concrete can connect the connecting surface 11 of the precast composite beam 1 and the connecting end 21 of the composite slab 2. At the same time, the stirrups 16 of the precast composite beam 1 cooperate with the truss steel bars 231 and the bottom reinforcement 221 of the composite slab 2 to improve the strength of the connecting node.

[0043] The precast concrete beam-slab connection node that is free of formwork and installation support provided by the utility model eliminates the need for temporary installation support and installation and removal of formwork through the cooperation between the connecting boss 12 on the connecting surface 11 of the precast composite beam 1 and the composite plate 2, thereby improving construction efficiency and reducing construction costs. At the same time, the height adjustment pad 15 between the connecting boss 12 and the composite plate 2 ensures that the precast composite beam 1 and the composite plate 2 are horizontally connected, thereby improving the strength and stability of the connection node.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A prefabricated concrete beam-slab connection node without formwork or installation support, comprising a prefabricated composite beam and a composite slab, characterized in that: The prefabricated composite beam is configured such that the bottom of the prefabricated composite beam to the connecting surface where the prefabricated composite beam cooperates with the composite plate presents an inverted trapezoidal cross-section that gradually extends outward toward both sides of the prefabricated composite beam along the height direction of the prefabricated composite beam, so that connecting bosses are formed at both ends of the connecting surface where the prefabricated composite beam cooperates with the composite plate, and the composite plate can be respectively placed on the connecting bosses at both ends.

2. The precast concrete beam-slab connection node without formwork or installation support according to claim 1 is characterized in that: Height-adjusting pads are provided between the connecting bosses at both ends of the connecting surface and the overlapping plates.

3. The precast concrete beam-slab connection node without formwork or installation support according to claim 2 is characterized in that: The height adjustment pads respectively arranged on the connection bosses at both ends of the connection surface can be configured to have the same height or different heights.

4. The precast concrete beam-slab connection node without formwork or installation support according to claim 1 is characterized in that: A keyway is provided in the middle area of ​​the connecting surface.

5. The precast concrete beam-slab connection node without formwork or installation support according to claim 4 is characterized in that: The keyway is formed by a square groove or a trapezoidal groove on the connecting surface.

6. The precast concrete beam-slab connection node without formwork or installation support according to claim 1 or 4, characterized in that: The composite slab comprises a prefabricated slab and a cast-in-place layer. The prefabricated slab is provided with connecting steel bars, which extend out of the composite slab and pass through the middle area of ​​the connecting surface.

7. The precast concrete beam-slab connection node without formwork or installation support according to claim 6 is characterized in that: Truss steel bars are arranged in the cast-in-place layer, and the truss steel bars are evenly distributed on the prefabricated panels.

8. The precast concrete beam-slab connection node without formwork or installation support according to claim 6 is characterized in that: The prefabricated composite beam is provided with beam stirrups, and the beam stirrups extend from the bottom of the prefabricated composite beam to the outside of the connection surface.

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