Core mold anti-floating tool for hollow floor construction and using method of core mold anti-floating tool

Abstract

The invention relates to the technical field of building construction, in particular to a mandrel anti-floating tool for hollow floor construction and a using method thereof.The mandrel anti-floating tool comprises a center supporting rod, the two ends of the center supporting rod are each provided with a limiting sleeve, and the limiting sleeves are internally in threaded connection with threaded connecting rods; a through hole is formed in the reinforcing steel bar limiting clamp corresponding to the threaded connecting rod, a limiting groove is formed in the reinforcing steel bar limiting clamp corresponding to the structural reinforcing steel bar, the reinforcing steel bar limiting clamp is connected to the threaded connecting rod through a nut, and the side, provided with the limiting groove, of the reinforcing steel bar limiting clamp is located on the side close to the limiting sleeve; the distance between the upper-layer structural steel bars and the lower-layer structural steel bars is controlled through the center supporting rods, the limiting sleeves and the steel bar limiting clamps, uneven thickness of a protective layer caused by floating of the core mold is prevented, quality accidents are avoided, the construction efficiency and quality are improved, and the tool is simple in structure, convenient to operate during use and worthy of being used and popularized in hollow floor construction.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a core mold anti-floating tooling for hollow floor construction and a use method thereof. Background Art

[0002] A hollow floor slab is a cast-in-place reinforced concrete hollow floor slab; it is also called a cast-in-place beamless hollow floor slab, which is a hollow floor slab without visible beams that is cast in place after the core mold product is installed; a hollow floor slab comprises steel bars, concrete, and core molds, and the core molds are buried in the reinforced concrete; during construction, the core molds often float up, which will affect the distance between the lower structure steel bars and the upper structure steel bars, resulting in uneven thickness of the upper and lower protective layers of concrete pouring and increased slab elevation, thereby affecting the quality of top slab pouring; currently, it is usually practiced to place pads and steel bars for a second time at the floating part of the core mold, and to use wire to tie and reinforce it for a second time to control the distance between the lower structure steel bars and the upper structure steel bars, which is time-consuming, labor-intensive, and labor-intensive. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a core mold anti-floating tooling for hollow floor construction which is easy to operate, saves manpower and can prevent the core mold from floating up, and a method of using the same.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A core mold anti-floating tool for hollow floor construction, including a central support rod, a limiting sleeve is arranged at each end of the central support rod, and a threaded connecting rod is connected to the inner thread of the limiting sleeve; it also includes a steel bar limiting card, the steel bar limiting card is provided with a through hole corresponding to the threaded connecting rod, the steel bar limiting card is provided with a limiting groove corresponding to the structural steel bar, the steel bar limiting card is connected to the threaded connecting rod through a nut, and the side of the steel bar limiting card with the limiting groove is located close to the limiting sleeve.

[0005] Preferably, a further technical solution of the present invention is: Preferably, the central support rod and the threaded connecting rod are both hollow structures.

[0006] Preferably, a plurality of side holes are provided on the side wall of the central support rod.

[0007] Preferably, two limiting grooves are arranged on the steel bar limiting clip, and the two limiting grooves are arranged symmetrically about the through hole.

[0008] Preferably, the outer diameter of the limiting sleeve is less than or equal to the central hole diameter of the core mold.

[0009] The present invention also discloses a method for preventing floating of a core mold for hollow floor construction, which is performed by using a core mold for preventing floating of a hollow floor construction, and the specific steps are as follows: S1: Support the top slab casting formwork, tie the lower structure steel bars, and mark the position where the core formwork needs to be installed; S2: First, connect the threaded connecting rod to both ends of the central support rod, clamp the steel bar limiter located at the lower side to the lower side of the lower structural steel bar at the marked position, and the lower end threaded connecting rod passes through its through hole and is locked and fixed by a nut, so that the steel bar limiter and the limit sleeve located at the lower side clamp the lower structural steel bar; S3: Install the core mold, and the center support rod is set through the center hole of the core mold; S4: Tie up the upper structure steel bars, then clamp the upper steel bar limiter to the upper side of the upper structure steel bars, and lock and fix them with nuts, so that the upper steel bar limiter and the limit sleeve clamp the upper structure steel bars; S5: Finally, pour the concrete.

[0010] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: The present invention controls the spacing between the upper and lower structural steel bars through the central support rod, the limiting sleeve and the steel bar limiting card, prevents the core mold from floating up and causing uneven thickness of the protective layer, avoids quality accidents, and improves construction efficiency and quality. The tooling has a simple structure and is easy to operate, and is worthy of promotion and use in hollow floor construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 1 is a schematic structural diagram of a core mold anti-floating tooling for hollow floor construction according to an embodiment of the present invention; Figure 2 Schematic diagram of explosion of the core mold anti-floating tooling for hollow floor construction in an embodiment of the present invention; Figure 3 It is a structural schematic diagram of the use of the core mold anti-floating tooling for hollow floor construction in an embodiment of the present invention.

[0012] Explanation of the reference numerals: 1. center support rod; 2. limiting sleeve; 3. threaded connecting rod; 4. steel bar limiting card; 401. limiting groove; 5. nut; 6. core mold; 7. lower structure steel bar; 8. upper structure steel bar. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with specific embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0014] like Figures 1 to 3As shown, this embodiment provides a core mold anti-floating tooling for hollow floor construction, including a central support rod 1, a limiting sleeve 2 is provided at each end of the central support rod 1, and a threaded connecting rod 3 is connected to the limiting sleeve 2 through an inner thread; the central support rod 1 and the threaded connecting rod 3 are both hollow structures; when pouring concrete, the concrete can flow along the hollow part of the central support rod 1 and the threaded connecting rod 3 to the bottom of the core mold 6, avoiding the problem of thin concrete or even hollow around the central hole of the lightweight core mold 6, thereby improving the construction quality and structural stability; It also includes a steel bar limiting card 4, a through hole is set on the steel bar limiting card 4 corresponding to the threaded connecting rod 3, a limiting groove 401 is set on the steel bar limiting card 4 corresponding to the structural steel bar, the steel bar limiting card 4 is connected to the threaded connecting rod 3 through a nut 5, and the side with the limiting groove 401 on the steel bar limiting card 4 is located close to the limiting sleeve 2; in this embodiment, two limiting grooves 401 are set on the steel bar limiting card 4, and the two limiting grooves 401 are symmetrically arranged about the through hole. For ease of installation, the outer diameter of the limiting sleeve 2 is less than or equal to the center hole diameter of the core mold 6.

[0015] A plurality of side holes are arranged on the side wall of the center support rod 1; concrete can flow out from the side holes to fill the center hole of the core mold 6; the connection strength between the core mold 6 and the concrete in the pouring area is increased, ensuring the uniform distribution and curing effect of the concrete.

[0016] like Figure 3 The present invention also discloses a method for preventing floating of a core mold for hollow floor construction, which is performed using a core mold for preventing floating of a hollow floor construction, and the specific steps are as follows: S1: Support the top plate casting formwork, tie the lower structure steel bars 7, and mark the position where the core formwork 6 needs to be installed.

[0017] S2: First connect the threaded connecting rod 3 to the two ends of the central support rod 1, and clamp the steel bar limit card 4 located on the lower side to the lower side of the lower structure steel bar 7 at the marked position. The lower end threaded connecting rod 3 passes through its through hole and is locked and fixed by the nut 5, so that the steel bar limit card 4 and the limit sleeve 2 located on the lower side clamp the lower structure steel bar 7.

[0018] S3: Install the core mold 6, and the center support rod 1 is set through the center hole of the core mold 6.

[0019] S4: Tie up the upper structure steel bars 8, then clamp the upper steel bar limit card 4 to the upper side of the upper structure steel bars 8, and lock and fix it with the nut 5, so that the upper steel bar limit card 4 and the limiting sleeve 2 clamp the upper structure steel bars 8.

[0020] S5: Finally, pour the concrete.

[0021] The present invention controls the spacing between the upper and lower structural steel bars 7 through the central support rod 1, the limiting sleeve 2, and the steel bar limiting card 4, so as to prevent the core mold 6 from floating up and causing uneven thickness of the protective layer, avoid quality accidents, and improve construction efficiency and quality. The tooling structure is simple and easy to operate, and is worthy of promotion and use in hollow floor construction.

[0022] The above description is only the preferred embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made by using the contents of the present invention specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A core mold anti-floating tool for hollow floor construction, characterized in that: The invention comprises a central support rod (1), wherein a limiting sleeve (2) is provided at each end of the central support rod (1), and the limiting sleeve (2) is internally threadedly connected to a threaded connecting rod (3); and further comprises a steel bar limiting clamp (4), wherein the steel bar limiting clamp (4) is provided with a through hole corresponding to the threaded connecting rod (3), and the steel bar limiting clamp (4) is provided with a limiting groove (401) corresponding to the structural steel bar, and the steel bar limiting clamp (4) is connected to the threaded connecting rod (3) through a nut (5), and the side of the steel bar limiting clamp (4) with the limiting groove (401) is located close to the limiting sleeve (2).

2. The core mold anti-floating tooling for hollow floor construction according to claim 1 is characterized in that: The central support rod (1) and the threaded connecting rod (3) are both hollow structures.

3. The core mold anti-floating tooling for hollow floor construction according to claim 2 is characterized in that: A plurality of side holes are arranged on the side wall of the central support rod (1).

4. The core mold anti-floating tooling for hollow floor construction according to claim 1 is characterized in that: The steel bar limiting clamp (4) is provided with two limiting grooves (401), and the two limiting grooves (401) are symmetrically arranged with respect to the through hole.

5. The core mold anti-floating tooling for hollow floor construction according to claim 1 is characterized in that: The outer diameter of the limiting sleeve (2) is less than or equal to the diameter of the center hole of the core mold (6).

6. A method for preventing core formwork from floating when constructing a hollow floor, characterized in that: The hollow floor construction core mold anti-floating tooling according to any one of claims 1 to 5 is used, and the specific steps are as follows: S1: supporting the top plate casting formwork, tying the lower structure steel bars (7), and marking the position where the core mold (6) needs to be installed; S2: First, the threaded connecting rod (3) is connected to the two ends of the central support rod (1), and the steel bar limiting clamp (4) located at the lower side is clamped to the lower side of the lower structural steel bar (7) at the marked position, and the lower end threaded connecting rod (3) passes through its through hole and is locked and fixed by a nut (5), so that the steel bar limiting clamp (4) and the limiting sleeve (2) located at the lower side clamp the lower structural steel bar (7); S3: Installing the core mold (6), wherein the center support rod (1) passes through the center hole of the core mold (6); S4: tying the upper structure steel bars (8), then clamping the upper steel bar limiter (4) on the upper side to the upper side of the upper structure steel bars (8), and locking and fixing them by means of a nut (5), so that the upper steel bar limiter (4) and the limiter sleeve (2) clamp the upper structure steel bars (8); S5: Finally, pour the concrete.

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