A fully prefabricated floor slab connection structure

Abstract

This utility model provides a connection structure for fully prefabricated floor slabs, belonging to the technical field of building structure connectors. A partial groove is provided on the upper edge of the fully prefabricated floor slab. A top reinforcing bar extends out of the slab body and is located within the groove, while a bottom reinforcing bar is located at the bottom of the groove and embedded within the slab body. Two pre-drilled holes are provided along the length of the connecting channel steel. One end of the connecting channel steel is located in the groove. The top reinforcing bar is welded to the side wall of the connecting channel steel. A screw hole corresponding to one of the pre-drilled holes is pre-drilled on the bottom plate of the groove. Pre-embedded bolts pass through the pre-drilled holes and screw holes to connect adjacent prefabricated floor slabs into a single unit. This achieves reliable fixing of the fully prefabricated floor slab connection, significantly reduces wet work procedures on the construction site, and improves the transportation inconvenience caused by the exposed reinforcing bar structure.

Description

Technical Field

[0001] This utility model belongs to the field of building structure connectors, specifically relating to a precast floor slab channel steel connection node. Background Technology

[0002] In the construction of fully precast floor slabs, the traditional connection method mainly uses the outward extension bars (beard bars) around the edges of the slab to achieve on-site connection of adjacent components. However, this method has the following technical defects: (1) a large number of outward extension bars make the transportation and stacking of precast slabs difficult; (2) the alignment accuracy requirements during on-site installation are high, resulting in low construction efficiency. To solve the above problems, the existing technology has proposed a connection scheme without outward extension bars, which is a connection structure with long grooves and upper reinforcing bars arranged on-site. However, this structure still has the following shortcomings: (1) the groove length requirement is large, which affects the structural integrity of the precast slab; (2) the on-site reinforcement placement process is cumbersome, and the amount of wet work is large; (3) the connection strength between adjacent floor slabs is insufficient. Utility Model Content

[0003] To address the aforementioned issues, this utility model provides a node that facilitates transportation and construction, effectively ensures reliable connection of precast floor slabs, and reduces transportation and storage problems caused by exposed reinforcement bars in precast floor slabs.

[0004] To achieve the above-mentioned utility model objectives, the technical solution of this application is as follows: A fully prefabricated floor slab connection structure, wherein a partial groove is provided on the upper edge of the fully prefabricated floor slab, a top reinforcing bar extending out of the fully prefabricated floor slab body and located in the groove, and a bottom reinforcing bar located in the lower part of the groove and embedded in the fully prefabricated floor slab body, and two reserved holes are provided along the length direction of the connecting channel steel, one end of the connecting channel steel is located in the groove, the top reinforcing bar is welded to the side wall of the connecting channel steel, and a screw hole corresponding to one of the reserved holes is reserved on the bottom plate of the groove, and a pre-embedded bolt passes through the reserved hole and the screw hole to connect adjacent fully prefabricated floor slabs into a whole.

[0005] Furthermore, mortar is applied to the bottom of the groove to ensure a tight bond between the channel steel and the bottom plate of the groove.

[0006] Furthermore, the reserved holes are oblong holes, and the two reserved holes are arranged horizontally and vertically to adjust the installation tolerance.

[0007] Furthermore, the welding length of the stressed top reinforcement welded to the side wall of the connecting channel steel is 10d for single-sided welding and 5d for double-sided welding, where d is the diameter of the stressed top reinforcement bar, to ensure the reliability of the connection.

[0008] Furthermore, the groove depth is at least 40 mm, the groove width is at least 150 mm, and the groove length is at least 200 mm.

[0009] Compared with the prior art, this application has the following advantages: by setting channel steel connectors in the groove of the precast slab, it not only significantly improves the connection reliability and integrity of adjacent floor slabs, but also simplifies on-site operations into efficient welding processes, greatly reduces the amount of wet work, and effectively solves the technical limitations of traditional connection methods. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure provided for this utility model;

[0011] Figure 2 for Figure 1 A cross-sectional schematic diagram of the beam connection of a fully precast floor slab (model AA).

[0012] Figure 3 for Figure 1 A cross-sectional view of the precast floor slab at the beam end;

[0013] Figure 4 for Figure 1 A cross-sectional view of a precast concrete floor slab at a non-beam end (in the middle of the slab);

[0014] Figure 5 This is a detailed plan view of the channel steel provided for this utility model;

[0015] Figure 6 This utility model provides a schematic diagram of the connection between the channel steel and the top reinforcing bar of the prefabricated floor slab.

[0016] In the diagram, 1 is a fully precast floor slab, 2 is a connecting channel steel, 3 is a connecting bolt, 4 is a beam, 11 is a groove, 12 is a top reinforcing bar, 13 is a bottom reinforcing bar, and 21 is a reserved hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "both sides", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model 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.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] like Figure 1-6 As shown, in this utility model, a prefabricated floor slab connection structure has a partial groove 11 on the upper edge of the prefabricated floor slab 1, a top reinforcing bar 12 extending out of the prefabricated floor slab body and located in the groove 11, and a bottom reinforcing bar 13 located in the lower part of the groove and embedded in the prefabricated floor slab body. Two reserved holes 21 are provided along the length of the connecting channel steel 2. One end of the connecting channel steel 2 is located in the groove 11. The top reinforcing bar 12 is welded to the side wall of the connecting channel steel 2. A screw hole corresponding to one of the reserved holes 21 is reserved on the bottom plate of the groove 11. The embedded bolt 3 passes through the reserved hole 21 and the screw hole to connect the adjacent prefabricated floor slabs into a whole.

[0021] Furthermore, mortar is applied to the bottom of the groove 11 to ensure that the channel steel 2 is tightly bonded to the bottom plate of the groove 11.

[0022] Furthermore, the reserved hole 21 is an oblong hole, and the two reserved holes are arranged horizontally and vertically to adjust the installation tolerance.

[0023] Furthermore, the welding length of the top reinforcing bar 12 welded to the side wall of the connecting channel steel 2 is 10d for single-sided welding and 5d for double-sided welding, where d is the diameter of the top reinforcing bar, to ensure the reliability of the connection.

[0024] Furthermore, the groove 11 has a depth of at least 40 mm, a width of at least 150 mm, and a length of at least 200 mm.

[0025] This utility model features a partial groove 11 at the edge of the precast floor slab connection, with a connecting channel steel 2 installed within the groove. Pre-embedded bolts 3 are installed on the bottom plate of the channel steel to connect adjacent precast slabs into a single unit. A reinforcing bar 12 extending from the groove is installed within the precast floor slab and welded to the side wall of the connecting channel steel. The welding length is 10d (d is the diameter of the reinforcing bar) for single-sided welding and 5d (d is the diameter of the reinforcing bar) for double-sided welding, ensuring reliable connection. The channel steel 2 within the groove of the precast floor slab 1, with pre-embedded bolts 3, effectively strengthens the connection between the connected precast floor slabs, compensating for the weakened bending stiffness and strength of the floor slab at the connection point. The channel steel 2 has pre-drilled holes 21 for the pre-embedded bolts 3. These holes are arranged horizontally and vertically to adjust installation tolerances. Mortar is applied to the bottom of the groove 11 to ensure a tight bond between the channel steel 2 and the bottom surface of the groove 11.

[0026] In this embodiment, the groove depth can be: the design floor slab thickness - 40mm; the groove width can be 150mm; and the groove length can be 200mm, to meet the requirements for convenient connection of pre-embedded pipelines and welding with the load-bearing top reinforcement.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fully precast floor slab connection structure, characterized by, A partial groove (11) is provided on the upper edge of the precast floor slab (1). A top reinforcing bar (12) extends out of the precast floor slab body and is located in the groove (11), and a bottom reinforcing bar (13) is located in the lower part of the groove and embedded in the precast floor slab body. Two reserved holes (21) are provided along the length of the connecting channel steel (2). One end of the connecting channel steel (2) is located in the groove (11). The top reinforcing bar (12) is welded to the side wall of the connecting channel steel (2). A screw hole corresponding to one reserved hole (21) is reserved on the bottom plate of the groove (11). The embedded bolt (3) passes through the reserved hole (21) and the screw hole to connect the adjacent precast floor slabs into a whole.

2. The precast floor slab connection structure according to claim 1, characterized in that, Mortar is applied to the bottom of the groove (11) to ensure that the channel steel (2) is tightly bonded to the bottom plate of the groove (11).

3. The precast floor slab connection structure according to claim 1, characterized in that, The reserved hole (21) is an oblong hole, and the two reserved holes are arranged horizontally and vertically to adjust the installation tolerance.

4. The precast floor slab connection structure according to claim 1, characterized in that, The welding length of the top reinforcing bar (12) welded to the side wall of the connecting channel steel (2) is 10d for single-sided welding and 5d for double-sided welding, where d is the diameter of the top reinforcing bar, to ensure the reliability of the connection.

5. The precast floor slab connection structure according to any one of claims 1-4, characterized in that, The groove (11) has a depth of at least 40 mm, a width of at least 150 mm, and a length of at least 200 mm.

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