Prefabricated bottom plate rigid connection structure of assembled laminated slab and assembled building

Abstract

The utility model provides a kind of assembled composite board prefabricated bottom plate rigid joint connection structure and assembled building.The assembled composite board prefabricated bottom plate rigid joint connection structure includes two assembled composite board prefabricated bottom plates oppositely arranged, assembled composite board whole pouring layer and the connecting piece of the connection of two assembled composite board prefabricated bottom plates, connecting piece includes the steel bottom plate below the connection of two assembled composite board prefabricated bottom plates and the fastener fixed on the top of steel bottom plate and passed in assembled composite board prefabricated bottom plate, the head of fastener is located inside assembled composite board whole pouring layer.The assembled composite board prefabricated bottom plate rigid joint connection structure, using the prefabricated bottom plate of existing ordinary span assembled composite board is spliced, so as to increase the span of composite board, reach certain assembled building for large-span demand, relative to existing pure cast-in-place floor, can reduce cast-in-place workload, reduce the amount of on-site construction, with the advantage that on-site construction is fast.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, and in particular to a rigid connection structure for prefabricated composite slab base plates and prefabricated buildings. Background Technology

[0002] With the increasing demand for "good houses," people have greater needs for spacious and personalized residences. For example, there is a need for living and dining rooms with large spans (over 6 meters) or more, or flexible partitioning between adjacent rooms (such as two adjacent bedrooms). Some users on certain floors need to be divided into two rooms, while others need to be combined into one room, or the location of room partitions may vary. These flexible usage requirements also necessitate slab spans of over 6 meters. However, due to transportation and hoisting costs, the span of ordinary prefabricated composite slabs on the market is generally no more than 5 meters, which limits the development and application of prefabricated buildings. Currently, slabs with these requirements are all cast-in-place, which affects the construction progress.

[0003] Currently, the minimum thickness of the precast base slab in prefabricated residential building composite slabs is 60mm, the minimum thickness of the post-cast composite layer is 70mm, and the minimum total slab thickness is 130mm. This patent proposes a rigid connection structure for the precast base slab of prefabricated composite slabs, which involves splicing and extending the precast base slab of ordinary span prefabricated composite slabs to increase the span of the composite slab. The structural nodes utilize high-strength steel and a fully prefabricated connection concept, featuring high node strength, environmental friendliness, low carbon footprint, and high efficiency. Simultaneously, it does not increase transportation and hoisting costs, and construction is convenient and highly industrialized. Utility Model Content

[0004] The main purpose of this utility model is to provide a rigid connection structure for prefabricated base plates of prefabricated composite slabs and prefabricated buildings. It aims to increase the span of prefabricated base plates of ordinary span prefabricated composite slabs by splicing them together, thereby reducing the difficulty of on-site construction.

[0005] To achieve the above objectives, this utility model provides a rigid connection structure for prefabricated composite slab base plates, including two prefabricated composite slab base plates arranged opposite each other, a prefabricated composite slab monolithic layer located above the two prefabricated composite slab base plates, and a connector connecting the two prefabricated composite slab base plates. The connector includes a steel base plate located below the connection point of the two prefabricated composite slab base plates and fasteners fixed above the steel base plate and passing through the prefabricated composite slab base plates. The heads of the fasteners are located inside the prefabricated composite slab monolithic layer.

[0006] Preferably, the connector includes multiple bolts fixed to the steel base plate.

[0007] Preferably, an epoxy resin structural adhesive layer is coated between the steel base plate and the prefabricated composite base plate.

[0008] Preferably, the bottom of the bolt is welded to the steel base plate.

[0009] Preferably, the precast base plate rigid connection structure of the precast composite slab further includes a steel cover plate located above the precast base plate of the precast composite slab. The steel cover plate is located inside the integral casting layer of the precast composite slab, and the head of the bolt passes through the steel cover plate and is tightened by a nut.

[0010] Preferably, the gap between the steel cover plate and the fastener is filled with epoxy resin structural adhesive.

[0011] Preferably, a steel plate is provided inside the two prefabricated composite slab base plates that are close to each other, and the bottom reinforcing bars of the prefabricated composite slab base plates are connected to the steel plate by double-sided welding.

[0012] Preferably, the bottom and top of the two prefabricated composite slab base plates that are close to each other are respectively provided with grooves to accommodate the steel base plate and the steel cover plate.

[0013] Preferably, the thickness of the steel plate, steel cover plate and steel base plate connecting the reinforcing bars does not exceed 10 mm.

[0014] This utility model also proposes a prefabricated building, including the above-mentioned prefabricated composite slab base plate rigid connection structure.

[0015] The prefabricated composite slab rigid connection structure proposed in this utility model has the following advantages:

[0016] 1. The precast base plate of the existing ordinary span prefabricated composite slab is spliced ​​to increase the span of the composite slab, which can meet the large span requirements of some prefabricated buildings. Compared with the existing pure cast-in-place floor slab, it can reduce the amount of cast-in-place work and reduce the amount of on-site construction, and has the advantage of rapid on-site construction.

[0017] 2. The connection structure adopts an assembly connection of steel plates and fasteners. The shear resistance of the fasteners is used to bear the axial tension and compression in the plane of the prefabricated bottom plate of the assembled composite slab, thereby improving the shear resistance of the connection structure.

[0018] 3. The bending moment of the joint is achieved by the steel base plate: The steel base plate is connected to the prefabricated composite slab base plate using bolts and epoxy resin structural adhesive, and the tensile strength of the steel base plate is used to achieve a rigid connection of the joint. Moreover, the tensile strength of the steel plate is much greater than that of concrete, which improves the structural strength of the joint;

[0019] 4. Shear keys are formed in the floor slab using bolts and nuts to ensure that the contact surface between the precast base plate 1 of the prefabricated composite slab and the integral cast-in-place layer does not slip or fail at the connection point;

[0020] 5. This connection structure has the advantages of convenient material procurement, no need for special irregular processing, convenient installation, reliable stress, low cost, and fully assembled connection with no wet work on site. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the rigid connection structure of the prefabricated base plate of the assembled composite slab of this utility model.

[0022] Figure 2 This is a schematic diagram of the planar structure of the connecting parts in the rigid connection structure of the prefabricated base plate of the assembled composite slab of this utility model.

[0023] In the figure, 1: Precast base slab of prefabricated composite slab; 2: Bottom reinforcing steel of precast base slab of prefabricated composite slab; 3: Integral layer of prefabricated composite slab; 4: Top reinforcing steel of integral layer of prefabricated composite slab; 5: Steel plate for connecting reinforcing steel; 6: Steel base plate; 7: Bolt; 8: Nut; 9: Steel cover plate.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] It should be noted that in the description of this utility model, the terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] This utility model proposes a rigid connection structure for prefabricated base plates of assembled composite slabs.

[0028] Reference Figure 1 and Figure 2 In this preferred embodiment, a rigid connection structure for prefabricated composite slab base plates includes two prefabricated composite slab base plates 1 arranged opposite each other, a prefabricated composite slab monolithic layer 3 located above the two prefabricated composite slab base plates 1, and a connector connecting the two prefabricated composite slab base plates 1.

[0029] The connector includes a steel base plate 6 located below the connection between the two precast base plates 1 of the precast composite slabs and fasteners fixed above the steel base plate 6 and passing through the precast base plate 1 of the precast composite slabs. The head of the fastener is located inside the integral pouring layer 3 of the precast composite slab.

[0030] In this embodiment, refer to Figure 2 The connecting components include multiple bolts 7 fixed to the steel base plate 6. The bottom of the bolts 7 is welded to the steel base plate 6. The spacing, number, and diameter of the bolts 7 on the steel base plate 6 need to be calculated and determined according to the stress conditions at the connection point and in accordance with current specifications.

[0031] Furthermore, an epoxy resin structural adhesive layer is applied between the steel base plate 6 and the prefabricated composite slab base plate 1. The epoxy resin structural adhesive layer firmly bonds the steel base plate 6 and the prefabricated composite slab base plate 1.

[0032] Furthermore, the rigid connection structure of this precast composite slab base plate also includes a steel cover plate 9 located above the precast composite slab base plate 1. The steel cover plate 9 is located inside the monolithic layer 3 of the precast composite slab, and the heads of the bolts 7 pass through the steel cover plate 9 and are tightened by nuts 8. By setting the steel cover plate 9, the shear force of the entire connection node is jointly borne by the steel base plate 6, the steel cover plate 9, and the monolithic layer 3 of the precast composite slab, thereby improving the shear resistance at the connection node.

[0033] Furthermore, the gap between the steel cover plate 9 and the fasteners is filled with epoxy resin structural adhesive. After installing the steel cover plate 9, the bolts 7 are inserted into the pre-drilled bolt holes on it, the nuts 8 are tightened, and then epoxy resin structural adhesive is injected under pressure into the gap between the steel cover plate 9 and the fasteners to seal it, thereby completing the connection of the prefabricated base plate 1 of the prefabricated composite slab and improving the stability of the overall structure.

[0034] Furthermore, a steel plate 5 is provided inside the two prefabricated composite slab base plates 1 that are close to each other, and the bottom reinforcing bars of the prefabricated composite slab base plate 1 are connected to the steel plate 5 by double-sided welding.

[0035] Furthermore, the bottom and top of the two prefabricated composite slab base plates 1, which are close to each other, are respectively provided with grooves to accommodate the steel base plate 6 and the steel cover plate 9. By providing grooves, the precise positioning of the steel base plate 6 and the steel cover plate 9 is achieved.

[0036] In this embodiment, the thickness of the steel plate 5, the steel cover plate 9, and the steel bottom plate 6 does not exceed 10mm.

[0037] The fabrication process of this prefabricated composite slab base plate rigid connection structure is as follows:

[0038] 1. The bottom reinforcing bars 2 within a certain length at the end of the prefabricated composite slab base plate 1 are connected to the reinforcing bar connecting plate 5 by double-sided welding. Simultaneously, grooves are pre-set on the bottom and top surfaces of the ends to facilitate the installation of the steel base plate 6 and steel cover plate 9. Both the reinforcing bar connecting plate 5 and the prefabricated composite slab base plate 1 require pre-drilled bolt holes during factory processing.

[0039] 2. The steel base plate 6 and bolts 7 are welded together in the factory to form a connector for easy subsequent installation;

[0040] 3. The bolt hole positions of the steel base plate 6, steel cover plate 9, and prefabricated composite slab base plate 1 must match each other.

[0041] The installation process of this prefabricated composite slab base plate rigid connection structure is as follows:

[0042] 1. At the construction site, first hoist the steel base plate 6 with the welded bolts 7 into place, and then apply epoxy resin structural adhesive to the upper surface of the steel base plate 6.

[0043] 2. Hoist the two prefabricated composite slab base plates 1 that need to be connected into place, and use connectors to initially connect the two prefabricated composite slab base plates 1 to be connected. Specifically, insert the bolts 7 of the steel base plate 6 into the reserved bolt holes of the prefabricated composite slab base plate 1 at the same time.

[0044] 3. Install a steel cover plate 9 in the groove above the prefabricated base plate 1 of the prefabricated composite slab, insert the pre-drilled bolt holes into the bolts 7, tighten the nuts 8 on the bolts 7, and seal the gaps of the bolts 7 by injecting epoxy resin structural adhesive under pressure, thus completing the connection of the prefabricated base plate 1 of the prefabricated composite slab.

[0045] 4. Concrete is poured on top of the precast base plate 1 of the prefabricated composite slab according to the conventional method. The concrete completely encloses the steel cover plate 9, thus forming the prefabricated composite slab integral pouring layer 3.

[0046] The prefabricated composite slab rigid connection structure proposed in this embodiment has the following advantages:

[0047] 1. The precast base plate of the existing ordinary span prefabricated composite slab is spliced ​​to increase the span of the composite slab, which can meet the large span requirements of some prefabricated buildings. Compared with the existing pure cast-in-place floor slab, it can reduce the amount of cast-in-place work and reduce the amount of on-site construction, and has the advantage of rapid on-site construction.

[0048] 2. The connection structure adopts a steel plate and fastener assembly connection. The shear resistance of the fastener is used to bear the axial tension and compression in the plane of the prefabricated bottom plate of the prefabricated composite slab, thereby improving the shear resistance of the connection structure.

[0049] 3. The bending moment of the node is achieved by the steel base plate 6: The steel base plate 6 is connected to the prefabricated composite slab base plate 1 by bolts 7 and epoxy resin structural adhesive, and the rigid connection of the node is achieved by utilizing the tension of the steel base plate 6. Moreover, the tensile strength of the steel plate is much greater than that of concrete, which improves the structural strength of the node;

[0050] 4. Shear keys are formed in the floor slab by bolts 7 and nuts 8 to ensure that the contact surface between the precast base plate 1 of the prefabricated composite slab and the integral cast layer at the connection does not slip or fail.

[0051] 5. This connection structure has the advantages of convenient material procurement, no need for special irregular processing, convenient installation, reliable stress, low cost, and no wet operation on site. It is a fully assembled connection.

[0052] This utility model also proposes a prefabricated building.

[0053] In this preferred embodiment, a prefabricated building includes a prefabricated composite slab base plate rigid connection structure. The specific structure and beneficial effects of the prefabricated composite slab base plate rigid connection structure are the same as those in the above embodiments, and will not be repeated here.

[0054] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A fabricated composite slab prefabricated bottom plate rigid connection structure, characterized by, The device includes two precast precast composite slab base plates arranged opposite each other, a precast composite slab monolithic layer located above the two precast composite slab base plates, and a connector connecting the two precast composite slab base plates. The connector includes a steel base plate located below the connection point of the two precast composite slab base plates and fasteners fixed above the steel base plate and passing through the precast composite slab base plates. The heads of the fasteners are located inside the precast composite slab monolithic layer.

2. The prefabricated bottom plate rigid connection structure of the assembled coiled plate according to claim 1, characterized in that, The connector includes multiple bolts fixed to the steel base plate.

3. The prefabricated bottom plate rigid connection structure of the assembled composite slab according to claim 2, characterized in that, An epoxy resin structural adhesive layer is applied between the steel base plate and the prefabricated composite base plate.

4. The prefabricated bottom plate rigid connection structure of the assembled coiled plate according to claim 2, characterized in that, The bottom of the bolt is welded to the steel base plate.

5. The prefabricated bottom plate rigid connection structure of the assembled composite slab according to any one of claims 2 to 4, characterized in that, It also includes a steel cover plate located above the precast base plate of the prefabricated composite slab. The steel cover plate is located inside the monolithic layer of the prefabricated composite slab, and the bolt heads pass through the steel cover plate and are tightened by nuts.

6. The fabricated composite slab prefabricated base plate rigid connection structure according to claim 5, characterized in that, The gap between the steel cover plate and the fasteners is filled with epoxy resin structural adhesive.

7. The prefabricated bottom plate rigid connection structure of the assembled coiled plate according to claim 5, characterized in that, The two prefabricated composite slab base plates are provided with steel reinforcement connecting plates inside their respective ends that are close to each other. The bottom reinforcing bars of the prefabricated composite slab base plates are connected to the steel reinforcement connecting plates by double-sided welding.

8. The prefabricated composite slab prefabricated base plate rigid connection structure according to claim 4, characterized in that, The two prefabricated composite slab base plates have grooves at their bottom and top, respectively, to accommodate the steel base plate and the steel cover plate, located close to each other.

9. The prefabricated bottom plate rigid connection structure of the assembled coiled plate according to claim 7, characterized in that, The thickness of the steel plate, steel cover plate and steel base plate connecting the reinforcing bars shall not exceed 10 mm.

10. A building of assembled parts, characterized in that, Includes the prefabricated composite slab rigid connection structure as described in any one of claims 1 to 9.

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