Composite structure of concrete secondary beam and concrete laminated slab

Abstract

The utility model provides a composite structure of a concrete secondary beam and a concrete laminated slab, which belongs to the field of fabricated buildings and comprises the concrete secondary beam, a floor laminated bottom plate, a shear-resistant part and a cast-in-place layer. A plurality of anti-shearing connecting grooves are formed in the top of the concrete secondary beam in the beam length direction. The floor system laminated bottom plate is laid on the concrete secondary beam and is of a continuous structure at least at the position of the concrete secondary beam, and anti-shearing connecting holes are formed in the positions, corresponding to the anti-shearing connecting grooves, of the floor system laminated bottom plate; the anti-shearing piece is arranged in the anti-shearing connecting groove and the anti-shearing connecting hole, and the top of the anti-shearing piece extends to the upper portion of the floor system laminated bottom plate; the cast-in-place layer is formed on the floor system laminated bottom plate in a pouring mode, and the shear-resistant piece is located in the cast-in-place layer and forms a shear-resistant structure with the cast-in-place layer.

Description

Technical Field

[0001] The utility model belongs to the field of assembled buildings, and in particular relates to a combined structure of a concrete secondary beam and a concrete composite slab. Background Art

[0002] For the existing secondary beam + concrete floor combination structure, there are generally two methods:

[0003] 1. As the precast concrete secondary beams need to have stirrups exposed at the top, the floor slabs cannot cross the secondary beams and are divided into shorter lengths, which is not conducive to improving the efficiency of factory production and on-site installation;

[0004] 2. For secondary beams that do not require exposed stirrups on the top, when the floor slab uses a continuous slab spanning the secondary beam, the floor slab and the secondary beam cannot form a reliable shear connection, and the secondary beam cannot be formed into a composite beam with a T-section together with the floor slab, which results in a high cost and is not conducive to saving materials.

[0005] For this reason, this application arises as the times require. Utility Model Content

[0006] The utility model aims to provide a prefabricated secondary beam without reinforcement but capable of forming an integral force-bearing combined structure with a composite floor slab.

[0007] To this end, the utility model provides a composite structure of a concrete secondary beam and a concrete composite slab, which is characterized by comprising:

[0008] A concrete secondary beam, wherein a plurality of shear-resistant connection grooves are provided on the top of the concrete secondary beam along the length direction of the beam;

[0009] A floor composite bottom plate, the floor composite bottom plate is laid on the concrete secondary beam and is a continuous structure at least at the concrete secondary beam, and a shear-resistant connection hole is provided at the position of the floor composite bottom plate corresponding to the shear-resistant connection groove;

[0010] A shear-resistant member is arranged in the shear-resistant connection groove and the shear-resistant connection hole, and extends above the composite bottom plate of the floor slab at the top.

[0011] The cast-in-place layer is cast and formed on the composite bottom plate of the floor slab, and the shear-resistant member is located in the cast-in-place layer and forms a shear-resistant structure with the cast-in-place layer.

[0012] Preferably, the shear member is U-shaped, and the U-shaped shear member includes at least two vertical bars and one transverse bar, the vertical bars are inserted into the shear force connection grooves and the shear force connection holes corresponding to the positions, and the transverse bar is connected to the two vertical bars and is located in the cast-in-place layer.

[0013] Preferably, the shear member includes a plurality of vertical bars and at least one transverse bar, the plurality of vertical bars are respectively inserted into the shear connection grooves and the shear connection holes at corresponding positions, and the transverse bar is connected to the plurality of vertical bars and is located in the cast-in-place layer.

[0014] Preferably, the anti-shear member is a vertical rib, and the vertical rib is inserted into the anti-shear force connection groove and the anti-shear force connection hole at corresponding positions.

[0015] Preferably, the depth of the shear-resistant connection groove is not less than 2.5 times the diameter of the vertical reinforcement.

[0016] Preferably, the distance between adjacent shear-resistant connection grooves is 100 to 500 mm.

[0017] Preferably, the shear member is located at a height of not less than 30 mm below the cast-in-place layer.

[0018] Preferably, the concrete secondary beam comprises secondary beam structural reinforcement, two end connecting pieces and structural concrete; the structural concrete is overmolded on the secondary beam structural reinforcement, the two end connecting pieces are partially buried in the structural concrete, and partially form an external connection portion; the end connecting piece is an end structural plate, the external connection portion of the end structural plate is provided with a plurality of assembly connection holes, and the buried portion of the end connecting plate is provided with a plurality of connection through holes.

[0019] Preferably, the shear-resistant connection groove is a tapered groove, and the groove diameter gradually increases from bottom to top.

[0020] Preferably, it also includes a hanging piece with anti-shear function, and the hanging piece is arranged in at least one group of the anti-shear connection grooves and the anti-shear connection holes.

[0021] Preferably, the hanging member is a hanging ring which is narrow at the top and wide at the bottom.

[0022] The technical effects of the above technical solution of the utility model come from one or more of the following combinations:

[0023] The concrete composite slab does not need to avoid the stirrups of the secondary beam on the secondary beam, so it can be a continuous structure, so that the composite slab can be made into a large slab, improving the efficiency of composite slab processing and installation.

[0024] By using the shear connection groove on the precast concrete secondary beam and the shear connection hole on the composite bottom plate of the floor slab, the shear parts are connected to form a whole, so that the secondary beam can form a whole with the composite plate, effectively reducing the height of the secondary beam and the amount of steel bars used.

[0025] Multiple groups of shear connection grooves and shear connection holes corresponding to the positions can also form a lifting point through the lifting parts when providing the shear installation structure, achieving multiple goals at one stroke; the lifting parts are lifting rings and do not need to be disassembled after the lifting is completed, and can be used as shear parts. At the same time, the lifting parts are small at the top and large at the bottom, and the reserved holes of the superimposed bottom plate are inserted into the lifting parts to automatically complete the positioning.

[0026] The shear-resistant connection groove is a tapered groove, and the groove diameter gradually increases from bottom to top; it is convenient for demoulding during prefabrication and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A structural schematic diagram of the utility model is expressed.

[0028] Figure 2 The front view of the utility model is expressed.

[0029] Figure 3 The schematic diagram of the structure of the concrete secondary beam in the utility model is expressed.

[0030] Figure 4 The structural disassembly diagram of the concrete secondary beam in the utility model is expressed.

[0031] Figure 5 The schematic diagram of the structure of the composite floor plate of the floor slab in the utility model is expressed. DETAILED DESCRIPTION

[0032] The following description is given to enable those skilled in the art to implement and use the utility model and incorporate it into specific application contexts. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Thus, the utility model is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0033] In the following detailed description, many specific details are set forth to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the practice of the present invention need not be limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without detailed display to avoid obscuring the present invention.

[0034] The reader is reminded of all documents and literature filed simultaneously with this specification and open to public inspection, and the contents of all such documents and literature are incorporated herein by reference. Unless otherwise directly stated, all features disclosed in this specification (including any attached claims, abstracts and drawings) can be replaced by alternative features for achieving the same, equivalent or similar purposes. Therefore, unless otherwise explicitly stated, each feature disclosed is only an example of a group of equivalent or similar features.

[0035] Note that, where used, the symbols left, right, front, back, top, bottom, forward, reverse, clockwise and counterclockwise are used only for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or direction between the various parts of the object. In addition, the terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Note that, in the case of use, further, preferably, further and more preferably are simple beginnings for explaining another embodiment based on the previous embodiment, and the content of further, preferably, further or more preferably followed by the above embodiment is combined with the previous embodiment as a complete composition of another embodiment. Several further, preferably, further or more preferably settings followed by the same embodiment can be arbitrarily combined to form another embodiment.

[0038] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention.

[0039] See also Figure 1 to Figure 5This embodiment provides a composite structure of a concrete secondary beam and a concrete composite slab, including a concrete secondary beam 2, a composite floor slab 1, a shear member 3 and a cast-in-place layer. Among them, the top of the concrete secondary beam 2 is provided with a plurality of shear-resistant connection grooves 20 along the length direction of the beam; the composite floor slab 1 is laid on the concrete secondary beam 2, and is a continuous structure at least at the concrete secondary beam 2, and a shear-resistant connection hole 10 is provided at the position of the composite floor slab 1 corresponding to the shear-resistant connection groove 20; the shear member 3 is provided in the shear-resistant connection groove 20 and the shear-resistant connection hole 10, and extends above the composite floor slab 1 at the top; the cast-in-place layer is cast and formed on the composite floor slab 1, and the shear member 3 is located in the cast-in-place layer and forms a shear-resistant structure with the cast-in-place layer.

[0040] Furthermore, in this embodiment, three different implementations are provided for the shear member 3:

[0041] 1. Please refer to Figure 1 and Figure 4 The shear member 3 is U-shaped, and the U-shaped shear member 3 includes at least two vertical ribs 31 and one transverse rib 32. The vertical ribs 31 are inserted into the corresponding shear connection grooves 20 and shear connection holes 10, and the transverse ribs 32 are connected to the two vertical ribs 31 and are located in the cast-in-place layer. There are multiple U-shaped shear members 3, and the vertical ribs 31 of each U-shaped shear member 3 are inserted into two adjacent groups of shear connection grooves 20 and shear connection holes 10, and the transverse ribs 32 are connected to two adjacent vertical ribs 31.

[0042] Second, the shear member 3 also includes a plurality of vertical ribs 31 and at least one transverse rib 32. The plurality of vertical ribs 31 are respectively inserted into the corresponding shear connection grooves 20 and shear connection holes 10. The transverse ribs 32 are connected to the plurality of vertical ribs 31 and are located in the cast-in-place layer. In this structural form, the shear member 3 is a fence type; each set of shear connection grooves 20 and shear connection holes 10 is inserted with vertical ribs 31, and then connected as a whole through transverse ribs 32 to form the shear member 3.

[0043] 3. Please refer to Figure 4 , the shear member 3 is a vertical rib 31, which is inserted into the shear connection groove 20 and the shear connection hole 10 at the corresponding position. In this structural form, the shear member 3 is a vertical rib 31, which is inserted into the shear connection groove 20 and the shear connection hole 10.

[0044] Furthermore, after experimental tests and a large amount of data accumulation, preferably, the depth of the shear connection groove 20 is not less than 2.5 times the diameter of the vertical rib 31. The distance between adjacent shear connection grooves 20 is 100 to 500 mm. The height of the shear member 3 located at the cast-in-place layer is not less than 30 mm.

[0045] Please combine Figure 1 , Figure 3 and Figure 4The concrete secondary beam 2 is a prefabricated secondary beam, which is prefabricated and formed in the factory and then transported to the site for installation. Specifically, the concrete secondary beam 2 includes a secondary beam structural rib 22, two end connectors and a structural concrete 23. Further, the structural concrete 23 is overmolded on the secondary beam structural rib 22, and the two end connectors are partially buried in the structural concrete 23, and partially form an external connection portion. Furthermore, the end connector is an end structural plate 21, and the external connection portion of the end structural plate 21 is provided with a plurality of assembly connection holes 212, and the buried portion of the end connection plate is provided with a plurality of connection through holes 211.

[0046] The shear-resistant connection groove 20 is formed by a mold during prefabrication. Preferably, the shear-resistant connection groove 20 is a tapered groove, and the groove diameter gradually increases from bottom to top, so as to facilitate demoulding.

[0047] In order to facilitate transportation and installation, in this embodiment, please combine Figure 1 , Figure 3 and Figure 4 The combined structure also includes a hoisting piece with a shear-resistant function, and the hoisting piece is at least arranged in one group of the shear-resistant connection grooves 20 and the shear-resistant connection holes 10. Furthermore, the hoisting piece is inserted into the shear-resistant connection grooves 20 and can be connected and fixed by the structural concrete 23. Its size is optimal to be able to pass through the shear-resistant connection holes 10. After the hoisting is completed, the hoisting piece can be directly used as the shear-resistant piece 3. Preferably, the hoisting piece 33 is narrow at the top and wide at the bottom, which is convenient for passing through the shear-resistant connection holes 10. Alternatively, the shear-resistant connection holes 10 corresponding to the hoisting piece 33 are designed to be long strips, and can be filled with cast-in-place layers later.

[0048] Beneficial effects of this technical solution:

[0049] The concrete composite slab does not need to avoid the stirrups of the secondary beam on the secondary beam, so it can be a continuous structure, so that the composite slab can be made into a large slab, improving the efficiency of composite slab processing and installation.

[0050] By using the shear connection groove 20 on the precast concrete secondary beam 2 and the shear connection hole 10 on the composite floor slab 1, the shear member 3 is connected to form a whole, so that the secondary beam can form a whole with the composite slab, effectively reducing the height of the secondary beam and the amount of steel bars used.

[0051] Multiple groups of positions corresponding to the shear force connection grooves 20 and the shear force connection holes 10 can also form a lifting point through the lifting part 33 when providing the installation structure of the shear part 3, thereby achieving multiple goals at one stroke; the lifting part 33 is a lifting ring and does not need to be disassembled after the lifting is completed, and can be used as the shear part 3.

[0052] The shear-resistant connection groove 20 is a tapered groove, and the groove diameter gradually increases from bottom to top; it is convenient to demould during prefabrication and improves efficiency.

[0053] Furthermore, the utility model is described in detail above in conjunction with the embodiments of the drawings, and a person skilled in the art can make various variations of the utility model according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the utility model, and the scope of protection of the utility model shall be defined by the scope of the attached claims.

Claims

1. A composite structure of a concrete secondary beam and a concrete composite slab, characterized in that: include: A concrete secondary beam, wherein a plurality of shear-resistant connection grooves are provided on the top of the concrete secondary beam along the length direction of the beam; A floor composite bottom plate, the floor composite bottom plate is laid on the concrete secondary beam and is a continuous structure at least at the concrete secondary beam, and a shear-resistant connection hole is provided at the position of the floor composite bottom plate corresponding to the shear-resistant connection groove; A shear member, which is arranged in the shear connection groove and the shear connection hole and extends above the floor composite bottom plate at the top; The cast-in-place layer is cast and formed on the composite bottom plate of the floor slab, and the shear-resistant member is located in the cast-in-place layer and forms a shear-resistant structure with the cast-in-place layer.

2. The combined structure of the concrete secondary beam and the concrete composite slab as claimed in claim 1, characterized in that: The shear member is U-shaped, and the U-shaped shear member includes at least two vertical bars and one transverse bar. The vertical bars are inserted into the shear connection grooves and the shear connection holes at corresponding positions, and the transverse bar is connected to the two vertical bars and is located in the cast-in-place layer.

3. The combined structure of the concrete secondary beam and the concrete composite slab as claimed in claim 1, characterized in that: The shear member includes a plurality of vertical bars and at least one transverse bar. The plurality of vertical bars are respectively inserted into the shear connection grooves and the shear connection holes at corresponding positions. The transverse bar is connected to the plurality of vertical bars and is located in the cast-in-place layer.

4. The combined structure of the concrete secondary beam and the concrete composite slab as claimed in claim 1, characterized in that: The anti-shear member is a vertical rib, and the vertical rib is inserted into the anti-shear force connection groove and the anti-shear force connection hole at corresponding positions.

5. The combined structure of the concrete secondary beam and the concrete composite slab according to any one of claims 2 to 4, characterized in that: The depth of the shear-resistant connection groove is not less than 2.5 times the diameter of the vertical reinforcement.

6. The combined structure of the concrete secondary beam and the concrete composite slab as claimed in claim 1, characterized in that: The distance between adjacent shear-resistant connection grooves is 100 to 500 mm.

7. The combined structure of the concrete secondary beam and the concrete composite slab as claimed in claim 1, characterized in that: The height of the shear member located at the cast-in-place layer is not less than 30 mm.

8. The combined structure of the concrete secondary beam and the concrete composite slab as claimed in claim 1, characterized in that: The concrete secondary beam includes secondary beam structural reinforcement, two end connecting pieces and structural concrete; the structural concrete is overmolded on the secondary beam structural reinforcement, and the two end connecting pieces are partially buried in the structural concrete and partially form external connecting parts; the end connecting pieces are end structural plates, and the external connecting parts of the end structural plates are provided with a plurality of assembly connecting holes, and the buried part of the end connecting plate is provided with a plurality of connecting through holes.

9. The combined structure of the concrete secondary beam and the concrete composite slab as claimed in claim 1, characterized in that: The shear-resistant connection groove is a tapered groove, and the groove diameter gradually increases from bottom to top.

10. The combined structure of the concrete secondary beam and the concrete composite slab according to claim 1, characterized in that: It also includes a hanging piece with anti-shear function, and the hanging piece is arranged in at least one group of the anti-shear connection grooves and the anti-shear connection holes.

11. The combined structure of the secondary concrete beam and the composite concrete slab as claimed in claim 10, characterized in that: The hanging piece is a hanging ring which is narrow at the top and wide at the bottom.

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