Fabricated composite floor slab and connecting joint structure thereof

Abstract

The utility model relates to the technical field of composite floor slabs, and discloses an assembly type composite floor slab and a connection node structure thereof, the assembly type composite floor slab comprises a floor slab body and embedded ribs, the embedded ribs are uniformly distributed on the upper surface of the floor slab body, the embedded ribs are connected with a steel reinforcement framework in the floor slab body, and four sides of the floor slab body are connected with connection ribs. The connecting ribs are connected with a steel reinforcement framework in the floor body, the outer ring of each connecting rib is sleeved with a sleeve in a sliding mode, and the sleeves of all the connecting ribs on the same side are welded and fixed to the upper surface of the same bottom plate. According to the technical scheme, the sleeves are arranged on the outer rings of the connecting ribs on the periphery of the floor slab body in the sleeving mode, the sleeves on the same side are fixedly welded to the upper surface of the same bottom plate, the bottom plate can be used for synchronously driving the multiple sleeves to move to the positions needing to be bent, and when the sleeves are used for bending the steel bars, the bending efficiency is greatly improved. The reinforcing steel bar can be easily bent at the position of the sleeve, the root of the reinforcing steel bar is prevented from being bent, the reinforcing steel bar can be more easily, accurately and rapidly bent, and follow-up installation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of composite floor slab technology, specifically to a prefabricated composite floor slab and its connection node structure. Background Technology

[0002] Composite floor slabs are prefabricated monolithic floor slabs composed of precast slabs and cast-in-place reinforced concrete layers. They offer good overall integrity, with smooth upper and lower surfaces facilitating finishing. Typically prefabricated in a factory, they include necessary embedded parts and reinforcing bars, making them suitable for high-rise buildings and large-span buildings requiring high overall rigidity. As components of prefabricated buildings, composite floor slabs can be prefabricated in a factory and then transported to the construction site for installation. They combine the high efficiency of precast concrete with the flexibility of on-site casting, increasing construction speed, reducing on-site work, and contributing to improved overall building quality.

[0003] During on-site installation, the composite floor slab supports need to be placed on the formwork surface. Adjacent composite floor slabs are connected by pre-embedded reinforcing bars exposed in the slabs, which are then bent upwards and tied to the reinforcing bars within the building frame. Before installation, the exposed reinforcing bars need to be bent upwards using a sleeve tool fitted around their outer ring. However, this operation easily leads to bending at the root of the reinforcing bars at the exposed slab location, making it difficult to bend them upwards at the desired position. Therefore, we propose a prefabricated composite floor slab and its connection node structure. Utility Model Content

[0004] The purpose of this utility model is to provide a prefabricated composite floor slab and its connection node structure. By placing sleeves around the outer ring of the connecting bars around the floor slab and welding and fixing the sleeves on the same side to the upper surface of the same base plate, the base plate can be used to simultaneously move multiple sleeves to the position where bending is required. When bending the reinforcing bars with the sleeves, it is easy to bend the reinforcing bars at the position of the sleeves, avoiding bending the reinforcing bars at the root. It is easier to bend the reinforcing bars accurately and quickly, which facilitates subsequent installation and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated composite floor slab and its connecting node structure, comprising a floor slab body and embedded reinforcing bars, wherein multiple embedded reinforcing bars are provided and evenly distributed on the upper surface of the floor slab body, and the embedded reinforcing bars are connected to the steel reinforcement skeleton inside the floor slab body; connecting bars are connected to all four sides of the floor slab body, and the connecting bars are connected to the steel reinforcement skeleton inside the floor slab body, wherein a sleeve can be slidably fitted on the outer ring of each connecting bar, and the sleeves of all connecting bars on the same side are welded and fixed to the upper surface of the same base plate.

[0006] By adopting the above technical solution, before hoisting the floor slab, the position of the sleeve is adjusted to the position where bending is required by adjusting the base plate. Then, the sleeve is used to bend the connecting bar by putting it on the outer ring. This prevents the bar from being bent at the root, ensuring a fast bending speed for the bar and thus guaranteeing installation efficiency.

[0007] Optionally, a stop bar is fixed to the end surface of the connecting rib, and the stop bar is fixed to the surface of the connecting rib by welding.

[0008] By adopting the above technical solution, it is possible to prevent the sleeve from slipping off the outer ring of the connecting rib during transportation or adjustment.

[0009] Optionally, the extension line of the stop bar passes through the center of the connecting rib section, and the length of the stop bar plus the diameter of the connecting rib is greater than the inner diameter of the sleeve.

[0010] By adopting the above technical solution, the sleeve will not slip off through the stop lever.

[0011] Optionally, a sponge strip is attached and fixed to the bottom surface of the floor slab, and the sponge strip is wrapped around the bottom outer ring of the floor slab.

[0012] By adopting the above technical solution, the outer ring of the floor slab is pressed against the surface of the template by a sponge strip to prevent grout from leaking out from the gaps.

[0013] Optionally, longitudinal bars are fixed between adjacent embedded bars, and the longitudinal bars are connected and fixed to the embedded bars by welding.

[0014] By adopting the above technical solution, the longitudinal reinforcement bars can also be used to lift the floor slab.

[0015] Optionally, adjacent longitudinal bars are parallel to each other and have the same size.

[0016] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0017] 1. The technical solution of this application is to fit sleeves around the outer ring of the connecting bars around the floor slab, and to weld and fix the sleeves on the same side to the upper surface of the same base plate. The base plate can be used to move multiple sleeves to the position that needs to be bent at the same time. After the base plate is pressed and fixed, when bending the steel bars with the sleeves, it is easy to bend the steel bars at the position of the sleeves, thus avoiding bending the steel bars at the root. This makes it easier to bend the steel bars accurately and quickly, which is convenient for subsequent installation.

[0018] 2. The technical solution of this application uses multiple sleeves welded and fixed on the same side above the same base plate. During transportation, the spacing between the sleeves is fixed, which also prevents the steel bars from being bent to both sides during transportation. Finally, the base plate and the frame steel bars are tied together, which can make the connecting bars more firmly locked.

[0019] 3. The technical solution of this application prevents the sleeve from slipping off the outer ring of the connecting rib during transportation or adjustment by welding and fixing a stop bar to the end surface of the connecting rib. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the prefabricated composite floor slab and its connecting nodes of this utility model.

[0022] Figure 2 This is a schematic diagram of the sleeve and connecting bar connection structure of the prefabricated composite floor slab and its connection node structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the bottom corner position of the prefabricated composite floor slab and its connecting node structure according to this utility model.

[0024] In the diagram: 1. Floor slab; 11. Sponge strip; 2. Embedded reinforcement; 3. Longitudinal reinforcement; 4. Connecting reinforcement; 41. Sleeve; 42. Stop bar; 5. Base plate. Detailed Implementation

[0025] Please see Figure 1-3 This utility model provides a technical solution: a prefabricated composite floor slab and its connection node structure, which is the same as the existing composite floor slab in that: it includes a floor slab body 1 and embedded bars 2. The floor slab body 1 is provided with a steel reinforcement skeleton inside, and is formed into a floor slab body 1 structure by casting. Multiple embedded bars 2 are provided and evenly distributed on the upper surface of the floor slab body 1, and the embedded bars 2 are connected to the steel reinforcement skeleton inside the floor slab body 1.

[0026] Longitudinal bars 3 are fixed between adjacent embedded bars 2. The longitudinal bars 3 are connected and fixed to the embedded bars 2 by welding. The adjacent longitudinal bars 3 are parallel to each other and have the same size. During hoisting, the slings can be connected to the longitudinal bars 3 to lift the floor slab 1 and other integral structures. After the floor slab 1 is installed in place, concrete is poured on its upper surface so that the embedded bars 2 and longitudinal bars 3 are completely poured into the post-poured concrete layer to form a composite floor slab structure.

[0027] Connecting bars 4 are connected to all four sides of the floor slab 1. The connecting bars 4 are connected to the steel reinforcement skeleton inside the floor slab 1. During hoisting and splicing, the connecting bars 4 need to be bent upward at the appropriate position. When the floor slab 1 is supported on the upper surface of the formwork, the connecting bars 4 of different floor slabs 1 are intertwined. Since the connecting bars 4 are bent upward, they can be easily tied together with the steel reinforcement of the frame structure to achieve connection and fixation of the floor slab 1. Finally, the exposed connecting bars 4 are poured into the concrete along with the steel reinforcement.

[0028] In addition, a sponge strip 11 is attached and fixed to the bottom surface of the floor slab 1. The sponge strip 11 is placed around the bottom outer ring of the floor slab 1. When the outer ring of the floor slab 1 is supported on the surface of the template, the sponge strip 11 abuts against the surface of the template to prevent the grout from leaking out from the gap between the floor slab 1 and the template during pouring, thus ensuring the pouring quality.

[0029] When the connecting bar 4 is bent upwards by using a sleeve to bend it around its outer ring, the connecting bar 4 is actually easier to bend at its root, which requires more care in terms of bending force and angle, and the bending process is more time-consuming and laborious. To solve this problem, this application allows each connecting bar 4 to be slidably fitted with a sleeve 41 around its outer ring, and all the sleeves 41 of the connecting bars 4 on the same side are welded and fixed to the upper surface of the same base plate 5. Before hoisting the floor slab 1, the sleeves 41 above it can be slid in the outer ring position of the connecting bar 4 by the base plate 5, and then the sleeves 41 can be slid and adjusted to the position where bending is required. One foot is placed on the base plate 5 to prevent the sleeves 41 from sliding, and the other hand holds the sleeve and puts it around the end of the connecting bar 4. This makes it easier to use the sleeve to bend the connecting bar 4 upwards at the position of the sleeve 41, and can bend the connecting bar 4 at the designated position more efficiently.

[0030] Additionally, a stop bar 42 is fixed to the end surface of the connecting rib 4. The stop bar 42 is fixed to the surface of the connecting rib 4 by welding. The extension line of the stop bar 42 passes through the center of the cross-section of the connecting rib 4. The length of the stop bar 42 plus the diameter of the connecting rib 4 is greater than the inner diameter of the sleeve 41. During transportation or adjustment, to prevent the sleeve 41 from slipping off the outer ring of the connecting rib 4, the length of the stop bar 42 plus the diameter of the connecting rib 4 must be less than the inner diameter of the sleeve to ensure that the sleeve can be fitted onto the outer ring of the connecting rib 4 containing the stop bar 42 and bent.

[0031] In use, before lifting the floor slab 1, the exposed connecting ribs 4 around the perimeter are bent to place the floor slab 1 on the ground. Then, the sleeve 41 above it is slid along the outer ring of the connecting ribs 4 using the base plate 5. The sleeve 41 is adjusted to the required bending position. The operator then steps on the base plate 5 with one foot to prevent the sleeve 41 from sliding, while holding the sleeve with the other hand and placing it on the outer ring of the end of the connecting rib 4. The sleeve is then used to pry it up, bending it upwards at the position of the sleeve 41. After bending the ends of all the connecting ribs 4, slings are used to connect them to the longitudinal reinforcement 3, and the entire floor slab 1 is lifted. The slab is then hoisted to the desired installation location and supported above the formwork. The bottom of the slab 1 is supported by sponge strips 11 against the surface of the formwork to prevent grout from leaking between the bottom of the slab 1 and the formwork during subsequent pouring. The connecting bars 4 of adjacent slabs 1 are staggered, and the bottom plate 5 is moved to ensure that the bottom plate 5 and the sleeve 41 are located at the bending position of the connecting bars 4. Then, the steel reinforcement of the building frame is tied, so that the upward bending part of the connecting bars 4 is tied to the steel reinforcement of the frame. In addition, tie wire is used to tie the bottom plate 5 to the frame skeleton to ensure the strength of the connection. Finally, the pouring work can be carried out.

Claims

1. A prefabricated composite floor slab and its connecting node structure, comprising a floor slab body (1) and embedded reinforcing bars (2), characterized in that: The pre-embedded bars (2) are provided in multiple and evenly distributed on the upper surface of the floor slab (1), and the pre-embedded bars (2) are connected to the steel reinforcement skeleton inside the floor slab (1). The floor slab (1) is connected to four sides by connecting bars (4), which are connected to the steel reinforcement skeleton inside the floor slab (1). Each connecting bar (4) has a sleeve (41) that can be slidably fitted on its outer ring. All the sleeves (41) of the connecting bars (4) on the same side are welded and fixed to the upper surface of the same base plate (5).

2. The prefabricated composite floor slab and its connection node structure according to claim 1, characterized in that: A stop bar (42) is fixed to the end surface of the connecting rib (4), and the stop bar (42) is fixed to the surface of the connecting rib (4) by welding.

3. The prefabricated composite floor slab and its connection node structure according to claim 2, characterized in that: The extension line of the stop bar (42) passes through the center of the cross section of the connecting rib (4), and the length of the stop bar (42) plus the diameter of the connecting rib (4) is greater than the inner diameter of the sleeve (41).

4. The prefabricated composite floor slab and its connection node structure according to claim 1, characterized in that: A sponge strip (11) is attached and fixed to the bottom surface of the floor slab (1), and the sponge strip (11) is placed around the bottom outer ring of the floor slab (1).

5. The prefabricated composite floor slab and its connection node structure according to claim 1, characterized in that: Longitudinal bars (3) are fixed between adjacent embedded bars (2), and the longitudinal bars (3) are connected and fixed to the embedded bars (2) by welding.

6. The prefabricated composite floor slab and its connection node structure according to claim 5, characterized in that: The adjacent longitudinal bars (3) are parallel to each other, and the longitudinal bars (3) have the same size.

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