A fully prefabricated two-way load-bearing floor slab and connection node

Abstract

A fully prefabricated two-way load-bearing floor slab and connection nodes, including a prefabricated concrete slab body, a support negative reinforcement space truss, a slab angle steel bar frame, and a slab bottom load-bearing steel bar. When the fully prefabricated two-way load-bearing floor slab is processed in a factory, the slab bottom load-bearing steel bars are first evenly arranged, and then the support negative reinforcement trusses are evenly arranged around the slab according to the design requirements, and the slab angle steel bar frame is arranged at the slab corner position, and then the junction box is arranged in advance at the middle position of the slab, and the junction box pipeline is arranged in advance according to the electromechanical design requirements. The fully prefabricated two-way load-bearing floor slab of the present invention has good load-bearing performance, a high degree of prefabrication, is more energy-saving and environmentally friendly, does not require scaffolding during construction, and the amount of wet work on site is small, which greatly improves the construction efficiency and shortens the construction period.

Description

Technical Field

[0001] The invention relates to a prefabricated component belonging to a building floor system, in particular to a fully prefabricated two-way force-bearing floor and a connection node. Background Art

[0002] The existing floor systems of prefabricated house structures can be divided into cast-in-place concrete floors, corrugated steel plate composite floors, and steel truss composite floors. Their disadvantages are that the on-site construction work is large, a large amount of formwork, steel bars, scaffolding, etc. are used, there are many operators on site, the construction speed is slow, there is greater environmental pollution, the safety protection cost is high, and the energy-saving and environmental protection indicators are low.

[0003] However, the concrete composite slab floor, which has been widely promoted in recent years, has a minimum slab thickness requirement of 130mm. A large amount of wet work is still required on site, and scaffolding still needs to be set up during construction. The stress form of the floor is mainly unidirectional, and the stress mode is not as good as that of the two-way slab.

[0004] The porous prefabricated panels used in the past have been banned because they are prone to falling off and collapsing under horizontal forces such as earthquakes and wind. Summary of the invention

[0005] The present invention aims to solve the deficiencies of the prior art and provide a fully prefabricated two-way load-bearing floor slab and connection node which minimizes the workload of on-site wet work, eliminates the need for scaffolding, and maximizes construction efficiency.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A fully prefabricated bidirectional load-bearing floor slab comprises a prefabricated concrete slab body 1 and a support negative reinforcement space truss 2, a plate angle steel bar frame 3 and a plate bottom load-bearing steel bar 4 prefabricated in the prefabricated concrete slab body 1; the prefabricated concrete slab body 1 comprises a middle part and an edge part, the plate bottom load-bearing steel bar 4 covers the middle part and the edge part of the prefabricated concrete slab body 1, support negative reinforcement trusses 2 are evenly arranged on the plate bottom load-bearing steel bar 4 and in the edge part of the prefabricated concrete slab body 1 along the direction extending from the edge, plate angle steel bar frames 3 are arranged on the plate bottom load-bearing steel bar 4 at the positive angle position where adjacent edges are connected, and the support negative reinforcement space truss 2 and the plate angle steel bar frame 3 are both tied to the plate bottom load-bearing steel bar 4.

[0008] In this embodiment, a junction box 9 and a junction box pipeline 10 are arranged at a corresponding position in the middle of the stress-bearing steel bars 4 at the bottom of the slab.

[0009] In this embodiment, the support negative reinforcement space truss 2 includes support negative reinforcement 2.3, truss web reinforcement 2.2 and first vertical reinforcement 2.1. After multiple truss web reinforcement 2.2 are connected end to end to form a tooth shape, they are welded on the support negative reinforcement 2.3 to form a piece of support negative reinforcement truss. Multiple first vertical reinforcement 2.1 are arranged between the two pieces of support negative reinforcement trusses to connect the two pieces to form a whole. The two ends of the first vertical reinforcement 2.1 are respectively welded to the end-to-end connection of the truss web reinforcement 2.2 corresponding to the two pieces of support negative reinforcement trusses.

[0010] In this embodiment, the plate angle steel bar frame 3 includes vertical bending bars 3.1 and second frame steel bars 3.2. The vertical bending bars 3.1 are serrated. A plurality of second frame steel bars 3.2 are arranged between the two vertical bending bars 3.1 to connect the two to form a whole. The two ends of the second frame steel bars 3.2 are respectively welded to each turning point corresponding to the two vertical bending bars 3.1.

[0011] In this embodiment, the thickness of the edge portion of the precast concrete slab 1 is smaller than that of the middle portion.

[0012] In this embodiment, the edge portion of the precast concrete slab 1 is 50 mm thick and no less than 350 mm wide.

[0013] The present invention also includes the following another implementation scheme, a fully prefabricated two-way load-bearing floor connection node, used to connect the above-mentioned fully prefabricated two-way load-bearing floor, including a steel beam 5 and additional steel bars 7, the edge portions of adjacent fully prefabricated two-way load-bearing floors are supported on the upper flanges of the steel beams 5, and the support negative reinforcement space trusses 2 of adjacent fully prefabricated two-way load-bearing floors are connected to each other through additional steel bars 7.

[0014] In this embodiment, shear studs 8 are evenly arranged on the top of the steel beam 5 , and the ends of the support negative reinforcement 2 . 3 are bent downward to be connected to the shear studs 8 .

[0015] In this embodiment, the length of the support negative reinforcement 2.3 is not less than 1 / 4 of the length of the precast concrete slab 1 in the short span direction.

[0016] In this embodiment, the distance between the ends of adjacent fully prefabricated two-way load-bearing floor slabs is not less than 70 mm.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The support negative reinforcement space truss 2 and the plate angle reinforcement frame 3 are used on the bottom stress reinforcement 4 to strengthen the edge and the positive angle, which is bidirectionally stressed, has clear stress performance and is not easy to fall off;

[0019] 2. The entire prefabricated two-way load-bearing floor is prefabricated in the factory. No scaffolding is required during construction, and the amount of wet work on site is small, which speeds up the construction and greatly shortens the completion time of the project;

[0020] 3. High degree of prefabrication, more environmentally friendly.

[0021] In summary, the fully prefabricated two-way load-bearing floor slab of the present invention has good load-bearing performance, a high degree of prefabrication, is more energy-saving and environmentally friendly, does not require scaffolding during construction, and has a small amount of wet work on site, which greatly improves construction efficiency and shortens construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the fully prefabricated two-way load-bearing floor slab of the present invention;

[0023] Figure 2 It is the reinforcement arrangement diagram of the present invention;

[0024] Figure 3 It is the layout diagram of the wire box of the present invention;

[0025] Figure 4 It is a three-dimensional diagram of the support negative reinforcement space truss of the present invention;

[0026] Figure 5 It is a three-dimensional diagram of the plate angle reinforcement frame of the present invention;

[0027] Figure 6 It is a large-scale drawing of the floor slab node of the present invention.

[0028] Figure 7 yes Figure 6 Cross-sectional view at 1-1.

[0029] Description of the attached drawings: 1- fully prefabricated two-way load-bearing floor slab; 2- space truss with negative reinforcement; 2.1- first vertical reinforcement; 2.2- web reinforcement of truss; 2.3- negative reinforcement of support; 3- plate angle reinforcement frame; 3.1- vertical bending reinforcement; 3.2- second vertical reinforcement; 4- load-bearing reinforcement at the bottom of plate; 5- steel beam; 6- stiffening plate; 7- additional reinforcement; 8- bolts; 9- junction box; 10- wire pipeline. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 7As shown, a fully prefabricated two-way load-bearing floor slab includes a prefabricated concrete slab body 1, a support negative reinforcement space truss 2, a slab corner reinforcement frame 3, and a slab bottom load-bearing reinforcement 4; when the fully prefabricated two-way load-bearing floor slab is processed in a factory, the slab bottom load-bearing reinforcement 4 is evenly arranged first, and then the support negative reinforcement truss 2 is evenly arranged around the slab according to the design requirements, and the slab corner reinforcement frame 3 is arranged at the slab corner position, and then the junction box 9 is arranged in advance at the middle position of the slab, and the junction box pipeline 10 is arranged in advance according to the electromechanical design requirements. After the reinforcement and the junction box are arranged, the factory pours concrete. After the fully prefabricated two-way load-bearing floor slab is processed in the factory, it is transported to the construction site and placed on the upper steel beam 5 by hoisting. The steel beam can also be a concrete beam. Shear bolts 8 are evenly arranged on the top of the steel beam 5, and additional reinforcement 7 is laid in the groove formed between the slabs. After completing the above processes, concrete is poured on site to form a whole with the concrete and the steel frame.

[0032] The support negative reinforcement space truss 2 is composed of support negative reinforcement 2.3, truss web reinforcement 2.2 and the first vertical reinforcement 2.1. First, one end of multiple truss web reinforcements 2.2 are welded to the lower side of the support negative reinforcement 2.3, and the other ends of adjacent truss web reinforcements 2.2 are welded to each other to form a piece of support negative reinforcement truss. Then, the two pieces of support negative reinforcement trusses are connected by the first vertical reinforcement 2.1 to form an integral support negative reinforcement space truss 2. The first vertical reinforcement 2.1 is welded to the welding end of the adjacent truss web reinforcement 2.2.

[0033] The plate angle steel bar frame 3 is composed of a vertical bending bar 3.1 and a second frame steel bar 3.2. The vertical bending bar 3.1 is sawtooth-shaped. The second frame steel bar 3.2 is arranged at each turning point of the vertical bending bar 3.1, and the vertical bending bar 3.1 and the second frame steel bar 3.2 are connected by welds.

[0034] The support negative reinforcement space trusses 2 are evenly arranged around the slab and are reliably connected to the slab bottom stress-bearing steel bars 4 by binding. The slab angle reinforcement frames 3 are set at the positive corners of the floor slab and are reliably connected to the slab bottom stress-bearing steel bars 5 by binding.

[0035] The thickness of the edge of the fully prefabricated two-way load-bearing floor slab is less than the thickness of the middle portion of the slab body. In this embodiment, the edge thickness of the fully prefabricated two-way load-bearing floor slab is 50 mm, and the width of the edge of the slab body is not less than 350 mm.

[0036] The upper flange span of the steel beam 5 is not less than 150 mm, the lower flange width is determined according to calculation and is as close to the partition wall width as possible, vertical stiffening ribs are evenly arranged on the sides of the steel beam web, and shear studs 8 are evenly arranged on the top of the steel beam, and the stud size is determined according to calculation.

[0037] When adjacent fully prefabricated two-way load-bearing floor slabs are installed during on-site construction, the spacing between the connection ends of the two fully prefabricated two-way load-bearing floor slabs is not less than 70 mm, and the additional steel bars 7 and the support negative reinforcement space trusses 2 are connected together by binding or welding to form a load-bearing whole.

[0038] After pouring concrete on site, the interface between new and old concrete is reliably tied through the truss web reinforcement 2.2 and the vertical bending reinforcement 3.1 to avoid cracks. The thinner slab section around the fully prefabricated two-way load-bearing floor slab forms a whole with the support negative reinforcement space truss 2 to improve the out-of-plane stiffness of the slab section. The length of the support negative reinforcement 2.3 is not less than 1 / 4 of the length of the slab in the short span direction, and the ends of the steel bars are bent downward.

[0039] During construction, the fully prefabricated two-way load-bearing floor slab is first transported to the construction site after being processed in the factory, and then placed on the upper part of the steel beam (the steel beam can also be a concrete beam) by hoisting, and shear bolts are evenly arranged on the top of the steel beam. Additional steel bars 7 are laid in the grooves formed between adjacent fully prefabricated two-way load-bearing floor slabs to connect them. After completing the above processes, concrete is poured on site to form a whole with the steel frame.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fully prefabricated two-way load-bearing floor slab, characterized in that: The invention comprises a precast concrete slab (1) and a support negative reinforcement space truss (2), a plate angle steel bar frame (3) and a plate bottom stress steel bar (4) precast in the precast concrete slab (1); the precast concrete slab (1) comprises a middle part and an edge part, the plate bottom stress steel bar (4) covers the middle part and the edge part of the precast concrete slab (1), the support negative reinforcement space truss (2) is evenly arranged on the plate bottom stress steel bar (4) and in the direction extending along the edge of the precast concrete slab (1), the plate angle steel bar frame (3) is arranged on the plate bottom stress steel bar (4) at the positive angle position where adjacent edges are connected, and the support negative reinforcement space truss (2) and the plate angle steel bar frame (3) are both tied to the plate bottom stress steel bar (4); The support negative reinforcement space truss (2) comprises support negative reinforcement (2.3), truss web reinforcement (2.2) and first vertical reinforcement (2.1); a plurality of truss web reinforcements (2.2) are connected end to end to form a tooth shape and then welded to the support negative reinforcement (2.3) to form a support negative reinforcement truss; a plurality of first vertical reinforcements (2.1) are arranged between two support negative reinforcement trusses to connect the two to form a whole; two ends of the first vertical reinforcement (2.1) are respectively welded to the end to end connection of the truss web reinforcements (2.2) corresponding to the two support negative reinforcement trusses; The plate angle steel bar frame (3) comprises a vertical bending bar (3.1) and a second frame steel bar (3.2); the vertical bending bar (3.1) is sawtooth-shaped; a plurality of second frame steel bars (3.2) are arranged between two vertical bending bars (3.1) to connect the two to form a whole; and two ends of the second frame steel bars (3.2) are respectively welded to each turning point corresponding to the two vertical bending bars (3.1).

2. The fully prefabricated two-way load-bearing floor slab according to claim 1, characterized in that: A wire box (9) and a wire box pipeline (10) are arranged at a corresponding position in the middle of the slab bottom stress-bearing steel bars (4).

3. The fully prefabricated two-way load-bearing floor slab according to claim 1 is characterized in that: The thickness of the edge portion of the precast concrete slab (1) is smaller than that of the middle portion.

4. The fully prefabricated two-way load-bearing floor slab according to claim 1, characterized in that: The edge portion of the precast concrete slab (1) is 50 mm thick and no less than 350 mm wide.

5. A fully prefabricated two-way load-bearing floor connection node, used to connect the fully prefabricated two-way load-bearing floor according to any one of claims 1 to 4, characterized in that: It comprises a steel beam (5) and additional steel bars (7), wherein the edge portions of adjacent fully prefabricated two-way load-bearing slabs are supported on the upper flanges of the steel beams (5), and the support negative reinforcement space trusses (2) of the adjacent fully prefabricated two-way load-bearing slabs are connected to each other via the additional steel bars (7).

6. The fully prefabricated two-way load-bearing floor slab connection node according to claim 5, characterized in that: Shear studs (8) are evenly arranged on the top of the steel beam (5), and the ends of the support negative reinforcement (2.3) are bent downwards and connected to the shear studs (8).

7. The fully prefabricated two-way load-bearing floor slab connection node according to claim 5, characterized in that: The length of the support negative reinforcement (2.3) is not less than 1 / 4 of the length of the precast concrete slab (1) in the short span direction.

8. The fully prefabricated two-way load-bearing floor connection node according to claim 5, characterized in that: The distance between the ends of adjacent fully prefabricated two-way load-bearing slabs shall not be less than 70mm.

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