Support-free composite floor slab construction device

Abstract

The utility model discloses a support-free composite floor slab construction device which is used for positioning a composite floor slab on a precast beam and comprises steel corbels and C-shaped steel, at least four steel corbels are embedded at the two ends of the composite floor slab in the length direction in a pairwise opposite mode, and a fixing nut is arranged at the bottom of each steel corbel. The at least two pieces of C-shaped steel are detachably arranged on the bottom face of the composite floor slab, openings of the two pieces of C-shaped steel are opposite, the two pieces of C-shaped steel are arranged in the length direction of the composite floor slab, and the two ends of each piece of C-shaped steel are connected with the fixing nuts on the two oppositely-arranged steel corbels through bolts respectively. The steel corbels are pre-buried at the two ends of the composite floor slab to increase the supporting distance between the composite floor slab and the precast beam, so that stable supporting of the composite floor slab and detachable connection of the C-shaped steel and the composite road slab can be achieved without using a scaffold, the flexural capacity and rigidity of the composite floor slab are improved, meanwhile, repeated use of components is achieved, and the construction cost is reduced. Production cost is saved, and construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a support-free composite floor slab construction device. Background Technology

[0002] Currently, the country is vigorously promoting the development of prefabricated buildings, with the core objectives of improving building quality, increasing construction efficiency, reducing labor input, and lowering environmental pollution. However, in the actual construction process of existing prefabricated buildings, many problems have been exposed in the installation of composite floor slabs.

[0003] See appendix Figure 1 In existing technologies, to ensure the stability of composite floor slab installation, construction workers erect a large amount of vertical scaffolding at the bottom of the composite floor slab to provide stable and effective support. Simultaneously, the scaffolding ensures sufficient support strength for the composite floor slab during concrete pouring and vibration. However, while scaffolding meets these construction requirements, its use not only results in a large quantity of building components but also requires significant manpower and time for erection, contradicting the national goal of improving quality and efficiency in promoting prefabricated construction. Summary of the Invention

[0004] To overcome the above-mentioned defects, this utility model provides a simple structure that can meet various needs of the construction process without the need for scaffolding.

[0005] The technical solution adopted by this utility model to solve its technical problem is to provide a supportless composite floor slab construction device for positioning composite floor slabs on precast beams, including:

[0006] At least four steel brackets are provided, and the four steel brackets are pre-embedded in pairs at both ends of the length direction of the composite floor slab, and each steel bracket is provided with a fixing nut at its bottom;

[0007] At least two C-shaped steel sections are detachably provided on the bottom surface of the composite floor slab. The openings of the two C-shaped steel sections are opposite each other and arranged along the length of the composite floor slab. At the same time, both ends of each C-shaped steel section are connected to fixing nuts on two oppositely arranged steel brackets by bolts.

[0008] As a further improvement of this utility model, the steel bracket is an L-shaped sheet member with a cross-sectional height of not less than 80mm. The bottom surface of its horizontal part is flush with the bottom surface of the composite floor slab, and the horizontal part extends along the length of the composite floor slab and is supported on the precast beam.

[0009] As a further improvement of this utility model, the length of the steel bracket supporting the precast beam is 30mm to 50mm.

[0010] As a further improvement of this utility model, the vertical part of the steel bracket extends upward to the top surface of the composite floor slab, and a hoisting hole is provided on the vertical part exposed outside the composite floor slab.

[0011] As a further improvement of this utility model, the C-shaped steel has two oppositely arranged side walls and a bottom wall integrally connected between the two side walls, one of the side walls abutting against the horizontal part of the steel bracket pre-embedded in the composite floor slab, and is threadedly connected to the fixing nut by the bolt.

[0012] As a further improvement of this utility model, the bottom wall of the C-shaped steel is provided with a plurality of weight-reducing holes spaced apart along its length.

[0013] As a further improvement of this utility model, the cross-sectional height of the C-shaped steel is 80mm to 120mm.

[0014] As a further improvement of this utility model, it also includes a sponge, which is filled into the screw hole of the fixing nut, and the sponge is removed after the composite floor slab is cast and solidified.

[0015] The beneficial effects of this utility model are: by pre-embedding steel brackets at both ends of the composite floor slab, the support distance between the composite floor slab and the precast beam is increased; by setting C-shaped steel at the bottom of the composite floor slab, the bending bearing capacity and stiffness of the composite floor slab are improved, the load requirements during the construction stage are met, construction measures are saved, and construction efficiency is improved; the detachable connection of the C-shaped steel allows it to be removed after construction to achieve the reuse of the components and save production costs. Attached Figure Description

[0016] Figure 1 A schematic diagram illustrating the use of scaffolding in existing technologies;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 AA is a cross-sectional view of this utility model.

[0019] Referring to the accompanying drawings, the following explanations are provided:

[0020] 10. Composite floor slab; 20. Precast beam; 30. Steel bracket; 301. Horizontal section; 302. Vertical section; 3021. Lifting hole; 40. Fixing nut; 50. C-shaped steel; 501. Side wall; 502. Bottom wall; 5021. Weight reduction hole; 60. Bolt. Detailed Implementation

[0021] The preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] See Figure 2 and 3 The supportless composite floor slab construction device provided by this utility model is used to position the composite floor slab 10 on the precast beam 20. It mainly includes steel brackets 30 and C-shaped steel 50, wherein the steel brackets 30 and C-shaped steel 50 are made of Q355D and Q355NE materials to provide sufficient support strength for the composite floor slab; at the same time, the number of steel brackets 30 and C-shaped steel 50 is adjusted according to the different width dimensions of the composite floor slab.

[0023] Specifically, at least four steel brackets 30 are configured, and the four steel brackets 30 are pre-embedded in pairs at both ends of the composite floor slab 10 along its length. Each steel bracket 30 has a fixing nut 40 at its bottom, and the screw hole of the fixing nut 40 is filled with sponge to prevent concrete from entering the screw hole during the pre-embedding of the steel bracket 30 and affecting the subsequent connection. The sponge can be removed after the composite floor slab 10 is poured and solidified.

[0024] At least two C-shaped steel beams 50 are detachably disposed on the bottom surface of the composite floor slab 10. The openings of the two C-shaped steel beams 50 are opposite each other and arranged along the length direction of the composite floor slab 10. At the same time, both ends of each C-shaped steel beam 50 are connected to the fixing nuts 40 on two oppositely arranged steel brackets 30 by bolts 60, so that the C-shaped steel beams 50 are detachable, that is, the position of each C-shaped steel beam is consistent with the position of the two oppositely arranged steel brackets.

[0025] Furthermore, the steel bracket 30 is an L-shaped sheet member with a cross-sectional height of not less than 80mm. The bottom surface of its horizontal portion 301 is flush with the bottom surface of the composite floor slab 10 to ensure that the recessed opening of the fixing nut is exposed, facilitating connection with the bolt. Simultaneously, this horizontal portion 301 extends along the length of the composite floor slab 10 and is supported on the precast beam 20. The length of the steel bracket 30 supported on the precast beam 20 is 30mm to 50mm. Based on the length of the composite floor slab 10, a 45mm extension length is preferred to serve as an effective support for the composite floor slab, thus eliminating the need for scaffolding for end support, saving construction components, and improving construction efficiency.

[0026] Furthermore, the vertical portion 302 of the steel bracket 30 extends upward to the top surface of the composite floor slab 10, and a hoisting hole 3021 is provided on the vertical portion 302 exposed outside the composite floor slab 10 to facilitate the hoisting of the composite floor slab and improve the convenience of construction.

[0027] Furthermore, the C-shaped steel 50 has two opposing side walls 501 and a bottom wall 502 integrally connected between the two side walls 501. One of the side walls 501 abuts against the horizontal portion 301 of the steel bracket 30 embedded in the composite floor slab 10 and is threadedly connected to the fixing nut 40 by the bolt 60. Meanwhile, the cross-sectional height of the C-shaped steel 50 is 80mm to 120mm, preferably 100mm. This design ensures sufficient structural strength while meeting actual construction requirements. Specifically, the two side walls 501 of the C-shaped steel 50 are horizontally arranged, and the top surface of the upper side wall is tightly fitted to the bottom surface of the composite floor slab 10 by bolts. This tight fit allows the C-shaped steel 50 to form an organic whole with the composite floor slab 10, effectively enhancing the rigidity of the composite floor slab 10 and improving its overall structural performance.

[0028] Furthermore, in order to reduce the load on the composite floor slab while ensuring the rigidity of the C-shaped steel 50 itself, multiple weight-reducing holes 5021 are spaced along the length of the bottom wall 502 of the C-shaped steel 50. These weight-reducing holes 5021 cleverly reduce the overall weight without affecting the key performance of the C-shaped steel 50, which brings convenience to construction and is in line with the concept of efficient and lightweight construction in prefabricated buildings.

[0029] Specifically, the construction process of this utility model is as follows:

[0030] Step 1: Using the existing pre-embedded process, steel brackets filled with sponge are placed at both ends of the composite floor slab. After the slab is formed, the sponge is removed to ensure the normal installation of the subsequent C-shaped steel.

[0031] Step 2: Place the C-shaped steel at the bottom of the composite floor slab and fix it to the corresponding steel bracket with bolts to construct the bottom support structure of the composite floor slab.

[0032] Step 3: Using existing hoisting tools, smoothly hoist the composite floor slab from Step 2 to the predetermined position between the precast beams. During the hoisting process, ensure that the steel brackets at both ends of the composite floor slab rest on top of the precast beams to provide stable support.

[0033] Step 4: Pour concrete into the space between the composite floor slab and the floor layer. After the concrete has fully solidified, a solid floor slab layer will be formed. Finally, remove the C-shaped steel to allow for subsequent reuse and efficient use of resources.

[0034] In summary, the supportless composite floor slab construction device provided by this utility model increases the support distance between the two ends of the composite floor slab and the precast beam by pre-embedding steel brackets at both ends, thus achieving stable support of the composite floor slab without the need for scaffolding. Furthermore, by setting C-shaped steel at the bottom of the composite floor slab, the bending load-bearing capacity and stiffness of the composite floor slab are improved, meeting the load requirements during the construction phase, saving construction measures, and improving construction efficiency. The detachable connection of the C-shaped steel allows for removal and reuse of the components after construction, saving production costs.

[0035] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A supportless composite floor slab construction device for positioning a composite floor slab (10) on a precast beam (20), characterized in that, include: At least four steel brackets (30) are provided, and at least four steel brackets (30) are pre-embedded in pairs at both ends of the length direction of the composite floor slab (10), and each steel bracket (30) is provided with a fixing nut (40) at its bottom. C-shaped steel (50), at least two of the C-shaped steel (50) are detachably provided on the bottom surface of the composite floor slab (10), the two C-shaped steel (50) have openings facing each other and are arranged along the length direction of the composite floor slab (10), and at the same time, the two ends of each C-shaped steel (50) are respectively connected to the fixing nuts (40) on two oppositely arranged steel brackets (30) by bolts (60).

2. The unsupported composite floor slab construction device according to claim 1, characterized in that: The steel bracket (30) is an L-shaped sheet member with a cross-sectional height of not less than 80mm. The bottom surface of its horizontal part (301) is flush with the bottom surface of the composite floor slab (10). At the same time, the horizontal part (301) extends along the length of the composite floor slab (10) and is supported on the precast beam (20).

3. The unsupported composite floor slab construction device according to claim 2, characterized in that: The steel bracket (30) is supported on the precast beam (20) for a length of 30mm to 50mm.

4. The unsupported composite floor slab construction device according to claim 3, characterized in that: The vertical part (302) of the steel bracket (30) extends upward to the top surface of the composite floor slab (10), and a hoisting hole (3021) is provided on the vertical part (302) exposed outside the composite floor slab (10).

5. The unsupported composite floor slab construction device according to claim 2, characterized in that: The C-shaped steel (50) has two opposing side walls (501) and a bottom wall (502) integrally connected between the two side walls (501). One of the side walls (501) abuts against the horizontal part (301) of the steel bracket (30) pre-embedded in the composite floor slab (10) and is threadedly connected to the fixing nut (40) by the bolt (60).

6. The unsupported composite floor slab construction device according to claim 5, characterized in that: Multiple weight-reducing holes (5021) are spaced apart along the length of the bottom wall (502) of the C-shaped steel (50).

7. The unsupported composite floor slab construction device according to claim 5, characterized in that: The section height of the C-shaped steel (50) is 80mm to 120mm.

8. The unsupported composite floor slab construction device according to claim 2, characterized in that: It also includes a sponge, which is filled into the screw hole of the fixing nut (40), and the sponge is removed after the composite floor slab (10) is poured and solidified.

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