CN110468968A - A kind of the fixation device and fixing means of laminated floor slab overhanging type steel - Google Patents

Abstract

The invention relates to a fixing device for a cantilevered section steel of a laminated floor, which comprises a conversion piece and a U-shaped bolt. A closed adjustment space is formed between them, the U-shaped bolts are connected to the conversion piece, the nut installation ends of the U-shaped bolts are set upwards, and a connecting piece is installed between the two nut installation ends. The invention also discloses a method for fixing the cantilevered section steel of the laminated floor, including five steps. The fixing device of the present invention can flexibly adjust the position of the U-bolt according to the needs of the site during construction, so as to realize the temporary adjustment of the fixing position of the cantilevered scaffolding section steel, and avoid the damage of waterproofing or floor slabs by opening holes in the prior art. The fixing method of the invention can reduce the construction cost and improve the construction efficiency.

Description

Fixing device and fixing method for cantilevered steel of laminated floor slabs

technical field

The invention relates to a fixing device and a fixing method for a cantilevered scaffold section steel of a superimposed floor, and belongs to the technical field of construction and installation of cantilevered scaffolds for a superimposed floor.

Background technique

The concrete laminated floor technology refers to dividing the floor into two parts along the thickness direction, the bottom is a prefabricated floor, and the upper part is a post-cast concrete laminated layer. The prefabricated bottom slab with the bottom reinforcement is used as a part of the floor slab, and it is loaded as a formwork of the post-cast concrete laminated layer during the construction stage, and forms an integral laminated concrete member with the post-cast concrete layer. The laminated floor slab has good integrity, and the upper and lower surfaces of the slab are flat, which is convenient for decoration of the facing layer, and is suitable for high-rise buildings and large-bay buildings that require high overall rigidity.

At present, during the construction of cantilevered scaffolding with superimposed slabs, it is usually avoided to change the superimposed slab of the cantilevered scaffolding part into a cast-in-place slab, or to optimize one superimposed slab into two combined superimposed slabs and cast-in-place at the joint U-bolts are pre-embedded in sections, which is safer but reduces the prefabrication rate and construction progress, and increases construction costs to a certain extent.

Part of the cantilevered scaffolding is fixed by installing U-shaped bolts on the prefabricated laminated floor slab, and the technology of opening holes after the laminated floor is adopted. The advantage of this method is that the hole position is accurate, but it is not suitable for floors with waterproof requirements, and it may damage waterproofing and the possibility of floor slabs. In addition, after the position of the opening is determined by this method, the position of the cantilevered steel cannot be flexibly adjusted according to the construction needs.

Contents of the invention

The technical problem to be solved by the present invention is to provide a fixing device for the cantilevered steel of the laminated floor, through the combination of the conversion embedded parts fixed in the laminated floor and the U-shaped bolts, the fixing of the cantilevered steel can be flexibly adjusted according to the construction needs Location.

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

A fixing device for a cantilevered section steel of a laminated floor, comprising a conversion piece and a U-shaped bolt, the conversion piece is pre-buried in a prefabricated laminated slab, and the top of the conversion piece exposes the prefabricated laminated slab and forms a gap between the prefabricated laminated slab and the prefabricated laminated slab closed conditioning space,

The U-bolt is connected to the conversion piece, the nut installation end of the U-bolt is set upward, and a connecting piece is installed between the two nut installation ends.

Further, the shape of the transition piece is n-shape.

Further, outwardly bent hooks are provided at both ends of the bottom of the transition piece. The hooks are used to hook the steel bars in the prefabricated laminated slabs to securely fix the transition piece.

Further, the width of the adjustment space is 300mm.

Further, the U-bolts are square right-angle U-bolts.

The present invention also relates to a method for fixing the above-mentioned cantilevered steel of the laminated floor, comprising the following steps:

S1. According to the construction design drawing, the conversion part is pre-embedded at the set position, and then the concrete of the prefabricated laminated slab is poured, so that the top of the conversion part exposes the prefabricated laminated slab and forms a closed adjustment space with the prefabricated laminated slab;

S2. Hoist the poured prefabricated laminated slab in place, pass the U-shaped bolt through the conversion piece and connect it with the conversion piece, so that the nut mounting end of the U-shaped bolt is set upward;

S3. Adjust the position of the U-shaped bolt in the adjustment space and temporarily fix it;

S4, pouring the upper layer of concrete on the prefabricated laminated slab;

S5. Place the cantilever-shaped steel in the U-shaped bolt, press the connecting piece on the top of the cantilever-shaped steel, and then tighten the nuts at both ends of the U-shaped bolt.

Further, at least three fixing devices are required to install and fix each cantilevered section steel 6 .

Further, in step S1, the width of the adjustment space is 300 mm.

Further, in step S2, the U-bolts are square right-angle U-bolts.

Compared with prior art, the beneficial effect of the present invention is:

1. The fixing device of the present invention reserves an adjustment space on the top of the conversion part, and the conversion part and the U-shaped bolt work together to adjust the position of the U-shaped bolt according to the needs of the site during construction, thereby realizing the fixed position of the cantilevered scaffold steel. Temporary adjustment avoids damage to waterproofing or floor slabs in the prior art.

2. The fixing device and fixing method of the present invention can reduce construction cost and improve construction efficiency.

3. The fixing device of the present invention has the advantages of simple structure, safe and reliable operation, convenient implementation, unlimited application range, and is suitable for popularization and application.

Description of drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of a preferred embodiment of the present invention after installation of cantilever steel.

Fig. 3 is a plan view of a preferred embodiment of the present invention for installing cantilever shaped steel.

Fig. 4 is a schematic structural diagram of a conversion member in a preferred embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a U-shaped bolt in a preferred embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the purpose, technical solution and advantages of the present invention will be more clear. It should be noted that the described embodiments are preferred embodiments of the present invention, but not all embodiments.

As shown in Fig. 1, Fig. 4 and Fig. 5, a fixing device for cantilevered steel of superimposed floor slabs includes an n-shaped transition piece 2 and a U-bolt. The conversion part 2 is pre-buried in the prefabricated laminated board 1, and the top of the conversion part 2 exposes the prefabricated laminated board 1 and forms a closed adjustment space 4 with the prefabricated laminated board 1. The width of the adjustment space 4 is 300mm. The two ends of the bottom of the transition piece 2 are provided with outwardly bent hooks 21, and the hooks 21 are used to hook the steel bars in the prefabricated laminated board to fix the transition piece 2 firmly. The U-bolt 3 is connected to the transition piece 2, the nut installation end of the U-bolt 3 is set upward, and a connecting piece 5 is installed between the two nut installation ends. The U-bolt 3 is preferably a square right-angle U-bolt.

As shown in Figure 2, a method for fixing the cantilevered steel of a laminated floor slab comprises the following steps:

S1. Pre-embed the conversion part 2 at the set position according to the construction design drawing, and then perform concrete pouring of the prefabricated laminated slab 1, so that the top of the conversion part 2 exposes the prefabricated laminated slab 1 and forms a closed adjustment with the prefabricated laminated slab 1 Space 4, adjust the width of space 4 to 300mm;

S2. Hoist the poured prefabricated laminated slab 1 in place, and pass the U-shaped bolt 3 through the conversion part 2 and connect it with the conversion part 2, so that the nut installation end of the U-shaped bolt 3 is set upward;

S3, adjusting the position of the U-shaped bolt 3 in the adjustment space 4 and temporarily fixing it;

S4, pouring the upper concrete 7 on the prefabricated laminated slab 1;

S5. Place the cantilever shaped steel 6 in the U-shaped bolt 3, press the connecting piece 5 on the top of the cantilever shaped steel 6, and then tighten the nuts at both ends of the U-shaped bolt 3.

Referring to FIG. 3 , each cantilevered section steel 6 requires at least three above-mentioned fixing devices to be installed and fixed.

The fixing device of the present invention reserves the adjustment space 4 on the top of the conversion part 2, the conversion part 2 and the U-shaped bolt 3 work together, and the position of the U-shaped bolt 3 can be adjusted according to the needs of the site during construction, thereby realizing the adjustment of the cantilevered scaffold steel The temporary adjustment of the fixed position avoids the damage to waterproofing or floor slabs in the prior art.

The above is only a description of the preferred embodiments of the present invention, and is not a limitation of the protection scope of the present invention. Obviously, any person skilled in the art can easily think of replacements or changes based on the above embodiments to obtain other embodiments. These All should be covered within the protection scope of the present invention.

Claims (9)

1. A fixing device for a cantilevered section steel of a laminated floor, characterized in that: It includes a conversion piece and a U-bolt, the conversion piece is pre-buried in the prefabricated laminated plate, the top of the conversion piece exposes the prefabricated laminated plate and forms a closed adjustment space with the prefabricated laminated plate, The U-bolt is connected to the conversion piece, the nut installation end of the U-bolt is set upward, and a connecting piece is installed between the two nut installation ends. 2. The fixing device for the cantilevered section steel of the laminated floor slab according to claim 1, characterized in that: The shape of the transition piece is n-shape. 3. The fixing device for the cantilevered section steel of the laminated floor slab according to claim 1 or 2, characterized in that: Both ends of the bottom of the transition piece are provided with outwardly bent hooks. 4. The fixing device for the cantilevered section steel of the laminated floor slab according to claim 1, characterized in that: The width of the adjustment space is 300mm. 5. The fixing device for the cantilevered section steel of the laminated floor slab according to claim 1, characterized in that: The U-bolts are square right-angle U-bolts. 6. A method for fixing a cantilevered section steel of a laminated floor, characterized in that it comprises the following steps: S1. According to the construction design drawing, pre-embed the conversion part described in any one of claims 1 to 3 at the set position, and then perform concrete pouring of the prefabricated laminated slab, so that the top of the conversion part exposes the prefabricated laminated slab and integrates with the prefabricated laminated slab. A closed adjustment space is formed between the plywood; S2. Hoist the poured prefabricated laminated slab in place, pass the U-shaped bolt through the conversion piece and connect it with the conversion piece, so that the nut mounting end of the U-shaped bolt is set upward; S3. Adjust the position of the U-shaped bolt in the adjustment space and temporarily fix it; S4, pouring the upper layer of concrete on the prefabricated laminated slab; S5. Place the cantilever-shaped steel in the U-shaped bolt, press the connecting piece on the top of the cantilever-shaped steel, and then tighten the nuts at both ends of the U-shaped bolt. 7. The method for fixing the overhanging section steel of the laminated floor slab according to claim 6, characterized in that: Each cantilever section steel needs at least 3 fixing devices to install and fix. 8. The method for fixing the overhanging section steel of the laminated floor slab according to claim 6, characterized in that: In step S1, the width of the adjustment space is 300 mm. 9. The method for fixing the overhanging section steel of the laminated floor slab according to claim 6, characterized in that: In step S2, the U-bolts are square right-angle U-bolts.