Novel composite structure of prefabricated secondary beam and composite floor slab

Abstract

The utility model provides a novel composite structure of a prefabricated secondary beam and a composite floor slab, which belongs to the field of fabricated buildings and comprises a prefabricated secondary beam, a composite floor slab and a floor slab cast-in-place layer. Wherein a pre-embedded structural part is embedded in the prefabricated secondary beam close to the top surface, the pre-embedded structural part comprises a surface structure main body and a web structure main body, the top surface of the surface structure main body is not higher than the top surface of the prefabricated secondary beam, and a bolting part is arranged on the surface structure main body; the laminated bottom plate is laid on the prefabricated secondary beam and is of a continuous structure at least at the prefabricated secondary beam, a positioning through hole is formed in the position, corresponding to the bolting piece, of the laminated bottom plate, and the bolting piece penetrates through the positioning through hole and extends to the upper portion of the laminated bottom plate; the floor cast-in-place layer is formed on the laminated bottom plate in a pouring mode, and the bolting piece is bolted in the floor cast-in-place layer and enables the prefabricated secondary beam, the laminated bottom plate and the floor cast-in-place layer to form an integral structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of fabricated building, especially relate to a novel combined structure of prefabricated secondary beam and composite floor. BACKGROUND

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

[0003] I. Since the prefabricated concrete secondary beam needs to expose stirrups at the top, the floor cannot span the secondary beam, and the floor is divided into a shorter length, which is not conducive to the efficiency improvement of factory production and on-site installation.

[0004] II. For the secondary beam without the need for top exposure of stirrups, when the floor adopts a continuous plate spanning the secondary beam, since the floor and the secondary beam cannot form a reliable shear connection, the secondary beam cannot form a T-shaped cross-section combined beam with the floor, which is relatively high in cost and is not conducive to saving materials.

[0005] Therefore, the present application comes into being. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a novel combined structure of composite floor spanning prefabricated secondary beam as a whole and forming a reliable shear whole with the prefabricated secondary beam.

[0007] To achieve this object, the utility model provides a novel combined structure of prefabricated secondary beam and composite floor, characterized by comprising:

[0008] The prefabricated secondary beam is buried with a pre-buried structural member near the top surface, the pre-buried structural member comprises a surface structure main body and a web structure main body, the top surface of the surface structure main body is not higher than the top surface of the prefabricated secondary beam, and a bolted member is arranged on the surface structure main body.

[0009] The composite bottom plate is laid on the prefabricated secondary beam and is a continuous structure at least at the prefabricated secondary beam, a positioning perforation is arranged on the composite bottom plate at a position corresponding to the bolted member, the bolted member is arranged in the positioning perforation and extends above the composite bottom plate.

[0010] The floor cast-in-place layer is formed on the composite bottom plate, the bolted member is bolted in the floor cast-in-place layer and forms an integral structure of the prefabricated secondary beam, the composite bottom plate and the floor cast-in-place layer.

[0011] Preferably, the pre-buried structural member is a T-shaped structural member, the T-shaped structural member comprises a surface plate and a web plate, the surface structure main body is implemented as a surface plate, and the web structure main body is implemented as a web plate.

[0012] Preferably, the face plate and the web of the T-shaped structure are arranged along the beam length direction of the prefabricated secondary beam.

[0013] Preferably, the web is continuous zigzag, and the continuous zigzag web is engaged in the prefabricated secondary beam.

[0014] Preferably, a steel cage is arranged in the prefabricated secondary beam, the steel cage comprises longitudinal reinforcement and stirrups, the stirrups are arranged around the longitudinal reinforcement, and each zigzag of the web is clamped between adjacent stirrups.

[0015] Preferably, the fastening member is a dowel, and the dowel is fixed to the face plate.

[0016] Preferably, the composite floor slab comprises a prefabricated floor slab and a concrete rib, and the concrete rib is formed on the prefabricated floor slab.

[0017] Preferably, the number of the positioning holes is multiple, and the distance between adjacent positioning holes is 100-600 mm.

[0018] Preferably, the height of the fastening member beyond the prefabricated secondary beam is not less than 70 mm.

[0019] The technical effects of the above technical scheme of the utility model are achieved by one or more of the following combinations:

[0020] The utility model discloses a composite floor slab is used as the whole board to cross the prefabricated secondary beam and is laid, and does not need to be discontinuous like traditional mode and is laid in the two sides along the prefabricated secondary beam, and the prefabricated secondary beam is buried in the embedded structural member and is provided with the fastening member, and the composite floor slab is fastened with the fastening member on the top of the prefabricated secondary beam through the hole, and the T-shaped connection section can also be formed, so that the prefabricated secondary beam, the composite floor slab and the floor slab cast-in-place layer of the composite floor slab form a shear-resistant whole body, and installation is more convenient.

[0021] The composite floor slab can be made into a longer plate, and the processing and installation efficiency of the composite floor slab is improved.

[0022] The composite floor slab can be a continuous plate in the construction stage, and the spanning capacity of the composite floor slab is increased.

[0023] The prefabricated secondary beam can form a whole body with the composite floor slab, and the height of the prefabricated secondary beam and the amount of steel are effectively reduced. ACCURACY

[0024] Figure 1 The structure diagram of the utility model is expressed.

[0025] Figure 2 The structure diagram of the prefabricated secondary beam and the composite floor slab in the utility model is expressed.

[0026] Figure 3The structure arrangement drawing of the embedded structural member is expressed.

[0027] Figure 4 The structure disassembly drawing of the utility model is expressed.

[0028] Figure 5 The structure schematic diagram of the embedded structural member in the utility model is expressed.

[0029] Figure 6 The top view of the utility model is expressed.

[0030] Figure 7 The structure schematic diagram of the prefabricated secondary beam in the utility model is expressed.

[0031] Figure 8 The front view of the utility model is expressed.

[0032] 1, prefabricated secondary beam; 11, bolted member; 12, longitudinal reinforcement; 13, stirrup; 2, composite bottom plate; 20, positioning perforation; 21, prefabricated bottom plate; 22, concrete rib; 3, embedded structural member; 31, face plate; 32, web; 4, floor cast-in-place layer. DETAILED DESCRIPTION

[0033] The following description is presented to enable any person skilled in the art to practice the present application and to incorporate it in specific applications without undue experimentation. Various modifications, and changes can be practiced by those skilled in the art without departing from the scope of the application, which is defined by the claims. Accordingly, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0034] In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present application.

[0035] The reader's attention is directed to all papers and documents which are filed concurrently with this specification and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference. All the features disclosed in this specification, (including any accompanying claims, abstract, and drawings) can be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed in this specification is one example only of a generic series of equivalent or similar features.

[0036] It is noted that, where used, the terms left, right, front, back, top, bottom, normal, reverse, clockwise and counterclockwise are used for convenience only and do not imply any particular fixed direction. In fact, they are used for the purpose of reflecting the relative position and / or direction between various parts of the object. In addition, the terms "first" and "second" are used for the purpose of description only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] It is noted that, where used, further, preferably, further and more preferably are simple beginnings of another embodiment based on the foregoing embodiment, and the contents after the further, preferably, further or more preferably are combined with the foregoing embodiment as the complete structure of another embodiment. The further, preferably, further or more preferably after the same embodiment can be arbitrarily combined to constitute another embodiment.

[0039] The present application will be described in detail below in combination with the drawings and specific embodiments. It is noted that the aspects described below in combination with the drawings and specific embodiments are only exemplary and should not be understood as limiting the scope of protection of the present application in any way.

[0040] Please refer to Figures 1-8 The present embodiment provides a novel composite structure of prefabricated secondary beam and composite floor slab, which comprises a prefabricated secondary beam 1, a composite bottom plate 2 and a floor cast-in-place layer 4. Among them, a pre-buried structural member 3 is buried in the prefabricated secondary beam 1 near the top surface, the pre-buried structural member 3 comprises a surface structure main body (which is preferably a panel 31) and an abdominal structure main body (which is preferably an abdominal plate 32), the top surface of the surface structure main body is not higher than the top surface of the prefabricated secondary beam 1, and the surface structure main body is provided with a bolted member 11; the composite bottom plate 2 is laid on the prefabricated secondary beam 1 and is at least a continuous structure at the prefabricated secondary beam 1, the composite bottom plate 2 is provided with a positioning hole 20 at a position corresponding to the bolted member 11, the bolted member 11 is arranged in the positioning hole 20 and extends above the composite bottom plate 2; the floor cast-in-place layer 4 is cast and formed on the composite bottom plate 2, the bolted member 11 is bolted in the floor cast-in-place layer 4 and forms an integral structure of the prefabricated secondary beam 1, the composite bottom plate 2 and the floor cast-in-place layer 4.

[0041] As a preferred embodiment of the present embodiment, please refer to Figure 3, the prefabricated secondary beam 1 is a factory prefabricated concrete segment wrapped with a steel reinforcement cage, which includes longitudinal reinforcement 12 and stirrup 13, which is prior art and will not be explained in detail. Further, the embedded structural member 3 is integrally formed with the prefabricated part during the factory prefabrication stage, and the bolted member 11 can be installed after the composite floor 2 is laid.

[0042] In this embodiment, the composite floor 2 is laid on the prefabricated secondary beam 1 as a continuous structure, which is explained as the area at A shown in Figure 6 When the composite floor 2 spans the prefabricated secondary beam 1, it is an integral plate structure, i.e. the composite floor 2 spans the prefabricated secondary beam 1 as an integral plate structure, rather than the intermittent structure or the spliced plate structure of the prior art by resting the composite floor 2 on the side of the prefabricated secondary beam 1.

[0043] Please refer to Figure 3 , Figure 4 and Figure 7 , in this embodiment, the embedded structural member 3 includes a surface structure body and an abdominal structure body, the surface structure body is used for the installation of the bolted member 11, and the abdominal structure body is engaged with the prefabricated secondary beam 1 to cooperate with the surface structure body for structural reinforcement. As a preferred embodiment of this embodiment, the embedded structural member 3 is a T-shaped structural member, which includes a surface plate 31 and an abdominal plate 32. Correspondingly, as shown in Figure 5 , the surface structure body is implemented as the surface plate 31, and the abdominal structure body is implemented as the abdominal plate 32.

[0044] Further, the surface plate 31 and the abdominal plate 32 of the T-shaped structural member are arranged along the beam length direction of the prefabricated secondary beam 1. Among them, the surface plate 31 can be a long strip of whole plate (as shown in Figure 5 ), or multiple rectangular plates can be spliced to form a sawtooth structure, and the abdominal plate 32 is arranged continuously in a sawtooth shape. Preferably, each sawtooth is clamped between adjacent stirrups 13 of the prefabricated secondary beam 1 and can be supplemented by welding for stability. When the prefabricated secondary beam 1 is formed, the continuous sawtooth-shaped abdominal plate 32 is engaged in the prefabricated secondary beam 1.

[0045] The bolted member 11 is a structural member that connects the cast-in-place floor layer 4, the composite floor 2 and the prefabricated secondary beam 1 into one, which is preferably implemented as a bolt, which is fixed to the surface plate 31.

[0046] In this embodiment, in order to realize the effective connection of the prefabricated secondary beam 1, the composite floor 2 and the cast-in-place floor layer 4 of the composite floor 2, the number of positioning holes 20 is multiple, which are arranged at intervals along the beam length direction, the distance between adjacent positioning holes 20 is 100-600mm, preferably 300mm; the hole width of the long circular hole is not more than 60mm.

[0047] Please refer to Figure 7, the floor cast-in-place layer 4 is poured and formed on the composite floor slab 2 and enters the composite part of the prefabricated secondary beam 1 through the positioning perforation 20, so as to be engaged and connected by the dowel, so that each positioning perforation 20 forms a T-shaped connection to form an integral structure, wherein the T-shaped connection is explained as pouring the cast-in-place concrete on the composite floor slab 2 to form the floor cast-in-place layer 4 and the part filled in the positioning perforation 20 and engaged with the dowel 11, and in the actual construction process, the positioning perforation 20 can be filled with grouting material.

[0048] It should be noted that the embodiment does not make any limitation on the structure of the composite floor slab 2, which can adopt a steel bar truss type composite floor slab 2 or the preferred concrete rib composite slab in the embodiment. Specifically, refer to Figure 2 、 Figure 3 and Figure 4 The composite floor slab 2 comprises a prefabricated floor slab 21 and a concrete rib 22, and the concrete rib 22 is formed on the prefabricated floor slab 21, and the position of the positioning perforation 20 is avoided from the concrete rib 22 after the structure of the concrete rib 22 is formed.

[0049] Further, in order to improve the engagement capacity of the dowel in the floor cast-in-place layer 4, the main section of the dowel exceeding the height of the prefabricated secondary beam 1 is preferably implemented to be not less than 70 mm.

[0050] The beneficial effects of the technical solution are as follows:

[0051] The utility model discloses a composite floor slab 2 as a whole plate across the prefabricated secondary beam and does not need to be discontinuously laid on the two sides along the prefabricated secondary beam as in the traditional way, embeds the embedded structural member 3 and sets the dowel 11 in the prefabricated secondary beam 1, and the dowel 11 in the prefabricated secondary beam top is connected by the hole of the composite floor slab 2, which also can form a T-shaped connection section, so that the prefabricated secondary beam, the composite floor slab 2 and the floor cast-in-place layer 4 of the composite floor slab 2 form a shear-resistant whole, and the installation is more convenient.

[0052] The composite floor slab 2 can be made into a longer plate, improving the processing and installation efficiency of the composite floor slab 2.

[0053] The composite floor slab 2 can become a continuous plate in the construction stage, increasing the spanning capacity of the composite floor slab 2.

[0054] The prefabricated secondary beam 1 can form a whole with the composite floor slab 2, effectively reducing the height of the prefabricated secondary beam 1 and the amount of steel bars.

[0055] Further, the utility model is described in detail in the above embodiment combined with the drawings, and the person skilled in the art can make various change examples to the utility model according to the above description. Thus, some details in the embodiment should not constitute the limitation on the utility model, and the protection scope of the utility model will be defined as the range of the attached claims.

Claims

1. A novel combined structure of precast secondary beams and composite floor slabs, characterized in that, include: A precast secondary beam, wherein a precast structural component is embedded near the top surface of the precast secondary beam, the precast structural component includes a surface structure main body and a web structure main body, the top surface of the surface structure main body is not higher than the top surface of the precast secondary beam, and the surface structure main body is provided with a bolting component; A composite base plate is laid on the precast secondary beam and is a continuous structure at least at the precast secondary beam. The composite base plate is provided with positioning holes corresponding to the bolts. The bolts pass through the positioning holes and extend above the composite base plate. The floor slab is cast in place and formed on the composite base plate. The bolted members are bolted to the floor slab and form an integral structure with the precast secondary beam, the composite base plate and the floor slab.

2. The novel composite structure as described in claim 1, characterized in that: The embedded structural component is a T-shaped structural component, which includes a face plate and a web plate. The face plate is the main body of the structure, and the web plate is the main body of the structure.

3. The novel composite structure as described in claim 2, characterized in that: The face plate and web of the T-shaped structural member are arranged along the beam length direction of the precast secondary beam.

4. The novel composite structure as described in claim 3, characterized in that: The web is continuously serrated, and the continuously serrated web engages within the precast secondary beam.

5. The novel composite structure as described in claim 4, characterized in that: The precast secondary beam is equipped with a steel cage, which includes longitudinal bars and stirrups. The stirrups are clamped to the longitudinal bars. Each serration of the web is clamped between adjacent stirrups.

6. The novel composite structure as described in claim 2, characterized in that: The bolt is a stud, which is fixed to the panel.

7. The novel composite structure as described in claim 1, characterized in that: The composite base plate includes a precast base plate and concrete ribs, with the concrete ribs formed on the precast base plate.

8. The novel composite structure as described in claim 1, characterized in that: The number of positioning perforations is multiple, and the distance between adjacent positioning perforations is 100~600mm.

9. The novel composite structure as described in claim 1, characterized in that: The height of the bolted connector exceeding the precast secondary beam is not less than 70mm.

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