Steel reinforced concrete floor and construction method thereof

Abstract

The application discloses a type steel concrete dense rib cavity floor and a construction method thereof, and relates to the technical field of assembled cavity floors, and the type steel concrete dense rib cavity floor comprises a panel layer, at least two cavity components and dense rib beams, the cavity components are connected through the dense rib beams, the panel layer is arranged on the cavity components and is integrated with the cavity components and the dense rib beams, the dense rib beam is provided with a concrete base body, a type steel base plate and stress reinforcement, the stress reinforcement is arranged on the type steel base plate, the cavity component is symmetrically provided with at least two support positions, and the support positions are connected with the type steel base plate. The type steel concrete dense rib cavity floor can save construction time, eliminate formwork, reduce the number of formwork supporting rods, save construction period and effectively reduce cost.

Description

Technical Field

[0001] This invention relates to the field of prefabricated cavity floor slab technology, specifically to a steel-concrete composite floor slab and its construction method. Background Technology

[0002] Currently, in prefabricated building construction, the construction of prefabricated cavity floor slabs often adopts a partially prefabricated and partially cast-in-place approach. That is, a single floor slab is first constructed by prefabricating the cavity, and then casting in concrete beams. On the one hand, this construction method requires a large number of supports and formwork at the bottom to support the weight of the cavity formwork and the cavity itself, especially the weight of the cast-in-place beams. Under current construction technology, a large number of support frames need to be densely arranged to ensure the safety and reliability of the supports, which severely restricts the space on the construction site. During the construction period, tools and materials cannot be placed on-site and become disorganized, affecting the construction progress and creating safety hazards.

[0003] On the other hand, uneven pressure and trampling by workers during cast-in-place concrete construction can cause subsidence and extensive deformation of the slab bottom. This requires adjustments to the support structure or corresponding reinforcement of the local structure. Existing construction techniques are extremely inconvenient for such adaptive adjustments, and can easily lead to overcrowding at the construction site, difficulty in workers moving around, slow construction speed, long construction period, and low construction efficiency. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a steel-concrete composite floor slab and its construction method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A steel-concrete composite floor slab includes a panel layer, at least two hollow components, and ribbed beams. The hollow components are connected by the ribbed beams, and the panel layer is applied over the hollow components and forms an integral whole with the hollow components and the ribbed beams.

[0007] The ribbed beam has a concrete base, a steel base plate, and reinforcing bars; the reinforcing bars are placed on the steel base plate.

[0008] The cavity component is symmetrically provided with at least two support positions; the support positions are connected to the steel base plate.

[0009] Based on the above technical solutions, the steel substrate can be I-beam, channel steel, H-beam, inverted T-beam, or straight steel.

[0010] Based on the above technical solution, the reinforcing bars are open stirrups.

[0011] Based on the above technical solution, the reinforcing ribs are welded or bolted to the steel base plate to form a whole.

[0012] Based on the above technical solution, the support position is connected to the closely ribbed beam, and the connection method is bolt connection, hinge or pin connection.

[0013] Based on the above technical solution, the support position is a groove, a protrusion, or an outward-extending steel bar.

[0014] Based on the above technical solution, the support position is provided with a protective layer, which is made of sheet metal, steel plate, soft plastic or high-performance composite material.

[0015] Based on the above technical solution, the reinforcing ribs are embedded in the panel layer.

[0016] Based on the above technical solution, the ends of the steel substrate are either triangular or straight joints.

[0017] Based on the above technical solution, a construction method for a steel-concrete composite floor slab includes the following steps:

[0018] Step 1: Locate the axis of the frame beam and the ribbed beam, and install support rods at the intersection of the ribbed beam and the frame beam or at the intersection between the ribbed beams.

[0019] Step 2: Install the corresponding top plate at the intersection point on the top of each support rod;

[0020] Step 3: Adjust the extension height of the support rods individually to meet the design requirements;

[0021] Step 4: Place the steel base plates of the closely ribbed beams in batches and connect and fix them in sequence to form a grid.

[0022] Step 5: Hoist the hollow component to complete the connection between the hollow component and the ribbed beam;

[0023] Step 6: Tie the top and / or bottom reinforcement bars of the frame beam;

[0024] Step 7: Install pipelines;

[0025] Step 8: Pour concrete for the frame beams, walls, and ribbed beams;

[0026] Step 9: Curing and shaping, then removing the support rods and top plate.

[0027] Compared with the prior art, the advantages of the present invention are as follows:

[0028] (1) Compared with the prior art, the steel-concrete floor slab of this invention increases the early strength of the ribbed beams before concrete pouring by setting the steel base plate, realizing completely formwork-free construction and reducing the number of support poles. In addition, the steel base plate material can directly participate in the stress of the ribbed beams, reducing the reinforcement of the ribbed beams, saving construction time, and effectively reducing costs. It also saves a lot of formwork and steel bars, effectively reducing carbon emissions.

[0029] (2) The steel-concrete floor slab of the present invention is provided with a steel base plate module of closely spaced ribbed beams that can be flexibly plugged in and assembled. The shape and size of the closely spaced ribbed beams can be freely adapted and adjusted, and the construction can be quickly matched and completed according to the construction plan.

[0030] (3) All components of the steel-concrete floor slab of the present invention can be produced and processed in batches in the factory, which not only greatly facilitates transportation between sites, but also has significant construction economic benefits when applied to the hoisting and assembly of high-rise buildings.

[0031] (4) The steel-concrete floor slab of the present invention has a reasonable layout and a safe and reliable structure. It greatly reduces the number of traditional supports, reserves a large bottom space, facilitates the inspection and passage of construction personnel, and solves the problem of "many, complicated and messy" construction site caused by traditional support formwork. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of a steel-concrete floor slab according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the overall installation structure of a steel-concrete floor slab according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of a steel-concrete floor slab with overlapping layers according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of a closely spaced ribbed beam in a steel-concrete floor slab according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of a steel-concrete floor slab with its reinforcing bars welded to a steel base plate, according to an embodiment of the present invention.

[0037] Figure 6 This is a structural schematic diagram of a cavity component of a steel-concrete floor slab according to an embodiment of the present invention;

[0038] Figure 7 This is a front view of a cavity component of a steel-concrete floor slab according to an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the steel base plate splicing and assembly structure of a steel-concrete floor slab according to an embodiment of the present invention;

[0040] Figure 9 This is a top view of a steel-concrete floor slab according to an embodiment of the present invention.

[0041] In the figure: 1-panel layer, 2-cavity component, 3-ribbed beam, 21-support position, 22-protective layer, 31-concrete matrix, 32-steel base plate, 33-stressing reinforcement. Detailed Implementation

[0042] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] See Figure 1 The schematic diagram shown in this embodiment of the invention is a structural diagram of a steel-concrete composite floor slab, which includes a panel layer 1, at least two cavity members 2 and ribbed beams 3. The cavity members 2 are connected by the ribbed beams 3. The panel layer 1 is covered on the cavity members 2 and forms an integral whole with the cavity members 2 and the ribbed beams 3.

[0044] See Figure 2 The diagram shown is a schematic representation of the overall installation structure of a steel-concrete floor slab in an embodiment of the present invention.

[0045] See Figure 4 A schematic diagram of the structure of a ribbed beam in a steel-concrete floor slab according to an embodiment of the present invention is shown. The ribbed beam 3 is provided with a concrete substrate 31, a steel base plate 32 and reinforcing bars 33; the reinforcing bars 33 are provided on the steel base plate 32.

[0046] See Figure 6 and Figure 7 The diagram shows a cavity component structure of a steel-concrete floor slab in an embodiment of the present invention. The cavity component 2 is symmetrically provided with at least two support positions 21; the support positions 21 are connected to the steel base plate 32.

[0047] The steel base plate 32 is made of I-beam, channel steel, T-beam or straight steel.

[0048] The reinforcing bar 33 is an open stirrup. The main reinforcing bars are only set at the top, and there are few or no reinforcing bars at the bottom. The stirrups face downwards.

[0049] The reinforcing rib 33 is welded or bolted to the steel base plate 32 to form a whole.

[0050] The support position 21 is connected to the closely ribbed beam 3 by welding, bolting, hinge or pin connection.

[0051] Support position 21 is a groove, a protrusion, or an outward-extending steel bar.

[0052] The support position 21 is provided with a protective layer 22, wherein the protective layer 22 is made of sheet metal, steel plate, soft plastic or high-performance composite material.

[0053] See Figure 3The diagram shown illustrates a steel-concrete composite floor slab with an overlapping layer in an embodiment of the present invention, where reinforcing bars 33 are embedded in the panel layer 1. Based on whether the surface layer of the cavity component is exposed, it is divided into overlapping layers and non-overlapping layers. In this embodiment, the steel-concrete composite floor slab with an overlapping layer has reinforcing bars 33 embedded in the panel layer 1, so that the panel layer 1 and the closely spaced ribbed beam 3 are bonded together as a single reinforced concrete structure after the concrete is poured and solidified.

[0054] See Figure 8 The diagram shown is a schematic diagram of the splicing and assembly structure of the steel base plate 32 of a steel-concrete floor slab in an embodiment of the present invention. The ends of the steel base plate 32 are triangular splicing interfaces or straight splicing interfaces, which can be spliced ​​and overlapped into the required structural shape according to actual needs.

[0055] A construction method for a steel-concrete composite floor slab includes the following steps:

[0056] Step 1: Locate the axis of the frame beam and the ribbed beam 3, and install support rods at the intersection of the ribbed beam 3 and the frame beam or at the intersection between the ribbed beams 3.

[0057] Step 2: Install the corresponding top plate at the intersection point on the top of each support rod;

[0058] Step 3: Adjust the extension height of the support rods individually to meet the design requirements;

[0059] Step 4: Place the steel base plates 32 of the closely ribbed beams in batches and connect and fix them in a grid pattern in sequence;

[0060] Step 5: Hoist the hollow component 2 to complete the connection between the hollow component 2 and the closely spaced beam 3;

[0061] Step 6: Tie the top and / or bottom reinforcement bars of the frame beam;

[0062] Step 7: Install pipelines;

[0063] Step 8: Pour concrete for the frame beams, walls, and ribbed beams.

[0064] Step 9: Curing and shaping, then removing the support rods and top plate.

[0065] In addition, the construction steps include tying the floor slab reinforcement bars, pouring concrete for the frame beams, walls, ribbed beams 3, and slab surface. Specifically, pins are installed on the top slab, with support rods located at each intersection, or at intervals of one or two intersections. The use of pins is only required when the upper slab of the ribbed beams 3 is a steel plate; it is generally not used.

[0066] Compared with existing technologies, the steel-concrete floor slab of this invention increases the early strength of the ribbed beams 3 before concrete pouring by using a steel base plate, achieving completely formwork-free construction and saving on supporting formwork, thus reducing the number of supporting poles. Furthermore, the steel base plate material can directly participate in the stress distribution of the ribbed beams 3, reducing the reinforcement required, saving construction time, and effectively lowering costs. It also significantly reduces formwork and steel reinforcement, effectively reducing carbon emissions.

[0067] This invention discloses a type of steel-concrete composite floor slab. By incorporating flexibly pluggable and assembled ribbed beam 3 steel base plate modules, the shape and size of the ribbed beam 3 can be freely adjusted to adapt to different construction plans, enabling rapid matching and completion of the construction. All components of this steel-concrete composite floor slab can be manufactured in batches in a factory, greatly facilitating inter-site transportation and offering significant economic benefits when used for hoisting and assembling high-rise buildings.

[0068] The steel-concrete floor slab of this invention has a reasonable layout and a safe and reliable structure. It greatly reduces the number of traditional supports, reserves a large bottom space, facilitates construction personnel to inspect and pass through, and solves the problem of "numerous, complicated and messy" construction sites caused by traditional support formwork.

[0069] This invention is not limited to the embodiments described above. Those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention. Contents not described in detail in this specification are prior art known to those skilled in the art.

Claims

1. A reinforced concrete multi-ribbed hollow floor system characterized by: The panel layer (1), at least two cavity components (2) and the dense rib beam (3) are connected by the dense rib beam (3) between the cavity components (2), the panel layer (1) is covered on the cavity component (2), and the panel layer (1) is integrated with the cavity component (2) and the dense rib beam (3); The dense rib beam (3) is provided with a concrete base body (31), a profile steel base plate (32) and a stress bar (33); the stress bar (33) is arranged on the profile steel base plate (32); the stress bar (33) is embedded in the panel layer (1), the stress bar (33) is an open stirrup, the main stress bar is arranged at the upper part, the lower part is not arranged, and the direction of the open stirrup is downward; The end of the profile steel base plate (32) is a triangular joint or a straight joint; The cavity component (2) is symmetrically provided with at least two support positions (21); the support position (21) is connected with the profile steel base plate (32), the support position (21) is a convex structure, and an iron sheet protective layer (22) is arranged on the convex structure.

2. A composite steel reinforced concrete multi-ribbed hollow floor slab according to claim 1, characterized in that: The profile steel base plate (32) is an I-shaped steel, a channel steel, an H-shaped steel, an inverted T-shaped steel or a straight steel.

3. A composite floor system according to claim 1, wherein: The stress bar (33) and the profile steel base plate (32) are welded or bolted to be integrated.

4. A composite steel reinforced concrete flat slab and ribbed hollow floor system as daimed in claim 1, wherein: The support position (21) is connected with the dense rib beam (3) in a welding, bolt connection, hinged or bolt connection mode.

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