A precast floor slab with reserved bar holes and a floor structure

Abstract

The utility model discloses a kind of reserved bar hole composite floor and floor structure, the composite floor includes prefabricated bottom plate, lower section steel embedded in board and upper section steel connected therewith, its innovation point is at: prefabricated bottom plate side wall is equipped with several oblique reserved bar hole.This design makes that composite floor has no exposed reinforcement in storage and transportation process, greatly improve space utilization and transportation efficiency, while avoid the reinforcement interference and security risk when hoisting in situ.Preserved bar hole can be designed as equal-diameter through-hole, equal-diameter through-hole with flared portion or big at top and small at bottom conical hole, it is convenient to insert bending reinforcement in situ and enhance the connection strength with post-poured concrete.Floor structure includes the above-mentioned composite floor, bending reinforcement inserted in hole and integrally poured post-poured concrete layer, form strong overallity, and the assembly type floor system of convenient construction.

Description

Technical Field

[0001] This utility model relates to the field of PC component technology, and in particular to a composite floor slab with pre-reserved rib holes. Background Technology

[0002] Composite floor slabs, a common type of prefabricated building component, consist of a precast base slab and a cast-in-place concrete layer. They offer advantages such as fast construction speed, controllable quality, energy efficiency, and environmental friendliness, and are widely used in modern buildings. Traditional composite floor slabs typically have reinforcing bars embedded along their edges during the prefabrication stage to connect with adjacent floor slabs or beams, thereby enhancing the continuity and load-bearing capacity of the overall structure.

[0003] However, composite floor slabs with protruding reinforcing bars present numerous problems in practical applications. Firstly, during storage and transportation, the protruding bars occupy significant space, restricting the stacking of composite floor slabs, resulting in low storage density, inefficient transportation, and increased logistics costs. Secondly, during on-site hoisting and installation, the protruding reinforcing bars are prone to collisions and entanglement, affecting construction efficiency and posing safety hazards, potentially causing cuts or punctures to construction workers. Furthermore, the protruding reinforcing bars are susceptible to deformation or damage during transportation and handling, impacting the quality of subsequent construction.

[0004] Therefore, there is an urgent need for a composite floor structure that is easy to store and transport, and has good connection performance and construction convenience. Utility Model Content

[0005] The purpose of this utility model is to address the above-mentioned shortcomings of the existing technology by providing a pre-reserved reinforced composite floor slab and floor structure, so as to solve the problems of steel bar interference, low space utilization, and major safety hazards in the storage, transportation and construction of existing composite floor slabs.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A precast reinforced concrete slab includes a precast base slab, upper reinforcing bars, and lower reinforcing bars. The lower reinforcing bars are precast inside the precast base slab, and the upper reinforcing bars are fixedly connected to the lower reinforcing bars and exposed above the precast base slab. Several inclined precast reinforced concrete holes are formed on the side wall of the precast base slab.

[0007] By setting pre-reserved reinforcement holes, the composite floor slabs can be placed in their relative positions on site, and then bent reinforcing bars can be inserted into the pre-reserved holes. This design allows for the placement of more composite floor slabs in the same space during storage and transportation, as no reinforcing bars protrude beyond the slab, thus increasing storage capacity and transportation efficiency. Simultaneously, during assembly, the absence of protruding reinforcing bars facilitates on-site hoisting of the composite floor slabs and prevents the reinforcing bars from contacting workers, reducing safety hazards.

[0008] Furthermore, a groove is formed on the side wall of the precast base slab, and the groove communicates with the lower end of the reserved reinforcement holes. By setting the groove, the bonding strength between the post-cast concrete and the composite floor slab can be increased.

[0009] Furthermore, the reserved reinforcement hole is a through hole of equal diameter.

[0010] Furthermore, the upper end of the reserved reinforcement hole is formed with a flared portion. By providing the flared portion, it is convenient to insert the bent reinforcement bars later.

[0011] Furthermore, the reserved reinforcement hole is a conical hole that is larger at the top and smaller at the bottom. After the bent reinforcement is inserted, concrete is poured afterward. The poured concrete forms a conical filling part in the conical hole and wraps around the bent reinforcement, which can improve the downward tensile strength of the bent reinforcement and improve the connection strength and stability between the composite floor slab and the poured concrete layer.

[0012] A floor structure comprising the aforementioned pre-reserved reinforced composite floor slab.

[0013] Furthermore, it also includes bent reinforcing bars inserted into the reserved reinforcement holes and the post-poured concrete layer; The post-cast concrete layer includes integrally cast post-cast floor slabs, post-cast beams, and filling sections for pre-reserved reinforcement holes.

[0014] Furthermore, the upper part of the bent steel bar rests against the upper surface of the precast base plate; the lower part of the bent steel bar extends into the post-cast beam.

[0015] The outstanding effect of this utility model is: Compared with existing technologies, by setting inclined reserved reinforcement holes on the side wall of the precast base plate, bent reinforcement bars can be inserted after on-site installation, avoiding space occupation and safety hazards caused by exposed reinforcement bars during storage and transportation, and improving storage capacity and transportation efficiency.

[0016] The pre-reserved reinforcement holes are designed to be tapered or have flared ends, which facilitates the insertion of reinforcement bars and forms a reliable anchorage structure after the concrete is poured, thereby improving the connection strength and stability.

[0017] This utility model has a simple structure and is easy to construct. It is suitable for industrial production and prefabricated building construction and has good prospects for promotion and application. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first embodiment of the composite floor slab; Figure 2 This is a schematic diagram of a second embodiment of the composite floor slab; Figure 3 This is a schematic diagram of a third embodiment of a composite floor slab; Figure 4This is a structural diagram of the floor slab.

[0019] Attached reference numerals: 1. Precast base slab; 11. Reserved reinforcement hole; 12. Settling trench; 13. Flared section; 2. Upper reinforcement; 3. Lower reinforcement; 4. Bent reinforcement; 5. Post-cast concrete layer; 51. Post-cast floor slab; 52. Post-cast beam. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0021] The following is for reference Figures 1 to 4 The present invention will be described as follows: A type of pre-reserved reinforced composite floor slab, such as Figure 1 As shown, the structure includes a precast base slab 1, upper steel sections 2, and lower steel sections 3. The lower steel sections 3 are precast within the precast base slab 1. The upper steel sections 2 and 3 are connected by welding or bolts and are exposed above the precast base slab 1 to enhance the rigidity and load-bearing capacity of the floor slab. Several inclined pre-drilled reinforcement holes 11 are formed on the sidewall of the precast base slab 1 for inserting bent reinforcing bars during on-site installation. Optionally, a groove 12 may also be formed on the sidewall of the precast base slab 1, communicating with the lower end of the pre-drilled reinforcement holes 11 to enhance the bonding between the post-cast concrete and the precast base slab. Example 1

[0022] In this embodiment, as Figure 1 As shown, the reserved reinforcement hole 11 is a through hole of equal diameter. That is, the diameter of the reserved reinforcement hole 11 remains consistent along its entire length. This type of through hole structure is simple to process, has low cost, and is suitable for general connection requirements. During on-site construction, after the composite floor slab is hoisted into place, the bent reinforcement 4 can be directly inserted into the through hole of equal diameter for subsequent concrete pouring. Example 2

[0023] This embodiment is an improvement upon the first embodiment. For example... Figure 2 As shown, the reserved reinforcement hole 11 is a through hole of equal diameter, but its upper end is formed with a flared portion 13. The design of the flared portion 13 facilitates the introduction and insertion of the bent reinforcement 4, reduces the difficulty and time of on-site construction, and improves installation efficiency. At the same time, the combination of the equal diameter through hole and the flared portion 13 can still ensure the effective anchorage of the reinforcement to the concrete. Example 3

[0024] In this embodiment, as Figure 3As shown, the reserved reinforcement hole 11 is a conical hole, wider at the top and narrower at the bottom. After the bent reinforcing bar 4 is inserted into the conical hole, the subsequent concrete pouring is carried out. The concrete forms a conical filling part inside the conical hole, encasing the bent reinforcing bar 4. This structure can significantly improve the downward tensile strength of the bent reinforcing bar, thereby enhancing the connection strength and stability between the composite floor slab and the subsequent concrete layer. The conical hole is particularly suitable for building components with high tensile strength requirements. Example 4

[0025] This embodiment relates to a floor structure, such as Figure 4 As shown, the floor structure includes the pre-reserved reinforcement hole composite floor slab described in any of the first to third embodiments above. The floor structure also includes bent reinforcing bars 4 inserted into the pre-reserved reinforcement holes 11 and a post-cast concrete layer 5. The post-cast concrete layer 5 includes an integrally cast post-cast floor slab 51, a post-cast beam 52, and a filling portion for the pre-reserved reinforcement holes 11. The upper part of the bent reinforcing bars 4 rests against the upper surface of the precast base slab 1, and the lower part extends into the post-cast beam 52. During on-site construction, the composite floor slab is first hoisted to the designed position, then the bent reinforcing bars 4 are inserted, and finally, concrete is poured to form the integral floor structure. This floor structure has the advantages of convenient construction, reliable connection, and good integrity, and is suitable for floor systems in prefabricated buildings.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A precast reinforced concrete composite floor slab, comprising a precast base slab (1), upper reinforcing bars (2) and lower reinforcing bars (3), wherein the lower reinforcing bars (3) are precast within the precast base slab (1), and the upper reinforcing bars (2) are fixedly connected to the lower reinforcing bars (3) and exposed above the precast base slab (1); characterized in that: The precast base plate (1) has several inclined reserved rib holes (11) formed on its side wall.

2. The composite floor slab with pre-reserved reinforcement holes according to claim 1, characterized in that: The precast base plate (1) has a groove (12) formed on its side wall, and the groove (12) is connected to the lower end of the reserved reinforcement hole (11).

3. A composite floor slab with pre-reserved reinforcement holes according to claim 1, characterized in that: The reserved reinforcement hole (11) is a through hole of equal diameter.

4. A composite floor slab with pre-reserved reinforcement holes according to claim 3, characterized in that: The upper end of the reserved rib hole (11) is formed with a flared part (13).

5. A composite floor slab with pre-reserved reinforcement holes according to claim 1, characterized in that: The reserved reinforcement hole (11) is a tapered hole that is larger at the top and smaller at the bottom.

6. A floor structure, characterized in that: The composite floor slab with pre-reserved reinforcement holes as described in any one of claims 1-5.

7. The floor structure according to claim 6, characterized in that: It also includes bent steel bars (4) inserted into the reserved reinforcement holes (11) and the post-cast concrete layer (5). The post-cast concrete layer (5) includes an integrally cast post-cast floor slab (51), a post-cast beam (52), and a filling part for filling the reserved reinforcement holes (11).

8. The floor structure according to claim 7, characterized in that: The upper part of the bent steel bar (4) rests against the upper surface of the precast base plate (1); the lower part of the bent steel bar (4) extends into the post-cast beam (52).

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