Novel steel bar truss laminated slab

Abstract

The utility model provides a novel steel bar truss laminated slab, and mainly relates to the field of laminated slabs. A novel steel bar truss laminated slab comprises a concrete bottom plate, fiber cloth is arranged at the bottom of the concrete bottom plate, a plurality of load-bearing steel bars are arranged in the concrete bottom plate in an array mode in the width direction, the two ends of each load-bearing steel bar are bent upwards to be exposed above the concrete bottom plate, and a plurality of truss steel bars are arranged in the concrete bottom plate in an array mode in the length direction. The lower chord steel bars are not exposed out of the concrete bottom plate, so that horizontal reinforcing bars are not formed on the side edges of the concrete bottom plate. The utility model has the beneficial effects that the horizontal reinforcing bars are not exposed on the four sides, a large amount of mold cost is saved in factory processing, the stacking and transporting efficiency is high, the problem of collision with peripheral beam reinforcing steel bars is avoided, and the mounting efficiency is very high; and close splicing seams are adopted in site construction, and no extra formwork needs to be erected.

Description

Technical Field

[0001] The utility model mainly relates to the field of composite plates, in particular to a novel reinforced steel truss composite plate. Background Art

[0002] Composite floor is an assembled integral floor made of prefabricated panels and cast-in-place reinforced concrete layers. Composite floor has good integrity, the upper and lower surfaces of the board are flat, and it is easy to decorate the finishing layer. It is suitable for high-rise buildings and large-span buildings that require high overall rigidity.

[0003] Traditional composite slabs have a steel bar truss spacing of about 600, with beard bars on all four sides, and the factory mold cost is high. The beard bars on the four sides of the composite slabs lead to low stacking and transportation efficiency, and the on-site construction is very troublesome. There is a common problem of collision between the beard bars and the surrounding beam steel bars, and the installation efficiency is low. The on-site construction adopts post-casting joints, which requires additional formwork. Utility Model Content

[0004] In order to solve the shortcomings of the prior art, the utility model provides a new type of reinforced truss composite plate, which has no beard ribs on the four sides, saves a lot of mold costs in factory processing, has high stacking and transportation efficiency, does not have the problem of collision with surrounding beam steel bars, and has very high installation efficiency; on-site construction adopts close-jointed seams without the need for additional formwork.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A novel reinforced truss composite plate comprises a concrete base plate, a fiber cloth is arranged at the bottom of the concrete base plate, a plurality of stress-bearing steel bars are arranged in an array along the width direction in the concrete base plate, both ends of the stress-bearing steel bars are bent upward and exposed above the concrete base plate, a plurality of truss steel bars are arranged in an array along the length direction in the concrete base plate, each of the truss steel bars is composed of an upper chord steel bar at the top, two lower chord steel bars at the bottom and a plurality of web steel bars in the middle, the web steel bars on both sides are respectively connected between the upper chord steel bar and the lower chord steel bars on that side, so that a triangle is formed between the two web steel bars and the concrete base plate, the lower chord steel bar is not exposed from the concrete base plate, so that no beard bars are formed on the side of the concrete base plate.

[0007] The thickness of the concrete bottom plate is 24-40 mm, and the unbent area of ​​the stressed steel bars is completely buried inside the concrete bottom plate.

[0008] Two lower chord steel bars on the same truss reinforcement are located outside the web reinforcement on the side where the two lower chord steel bars are located, and the lower chord steel bars are located above the stress-bearing reinforcement.

[0009] The distance between two adjacent truss steel bars is 200-250 mm.

[0010] The fiber cloth is an alkali-resistant glass fiber mesh cloth or a crack-resistant fiber cloth.

[0011] Compared with the existing technology, the criss-cross stress-bearing steel bars in the composite slab are changed to unidirectional stress-bearing steel bars, and the unidirectional stress-bearing steel bars are changed to an upwardly bent structure. By reducing the thickness of the concrete base plate and increasing the arrangement density of the truss steel bars, the lower chord steel bars can be used to completely replace the transverse stress-bearing steel bars, so that there are no ribs on the four sides of the composite slab, and the factory processing saves a lot of mold costs. The composite slab without ribs makes the stacking and transportation of the composite slab efficient, there is no problem of collision with the surrounding beam steel bars, and the installation efficiency is very high. The on-site construction adopts close-jointed seams, and no additional formwork is required. This composite slab can be produced through a factory-based fully automated assembly line, and the processing efficiency is very high. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] The numbers shown in the accompanying drawings are: 1. upper chord steel bars; 2. lower chord steel bars; 3. web bars; 4. stress-bearing steel bars; 5. fiber cloth; 6. concrete base plate. DETAILED DESCRIPTION

[0014] The utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by this application.

[0015] like Figure 1 As shown, the utility model discloses a new type of reinforced truss composite plate, including a concrete bottom plate 6, a fiber cloth 5 is arranged at the bottom of the concrete bottom plate 6, and the fiber cloth 5 is an alkali-resistant glass fiber mesh cloth or a crack-resistant fiber cloth. The fiber cloth 5 is used to improve the bonding degree between concretes and to improve the bottom surface strength of the entire composite plate. A plurality of stress-bearing steel bars 4 are arranged in an array along the width direction in the concrete bottom plate 6, and both ends of the stress-bearing steel bars 4 are bent upward and exposed above the concrete bottom plate 6. The unbent area of ​​the stress-bearing steel bars 4 is completely buried in the concrete bottom plate 6. The stress-bearing steel bars 4 are used to improve the bonding degree between the concrete bottom plates 6, and serve as a skeleton structure to improve the overall strength of the composite plate.

[0016] Several truss steel bars are arranged in an array along the length direction in the concrete bottom plate 6. Each of the truss steel bars is composed of an upper chord steel bar 1 at the top, two lower chord steel bars 2 at the bottom, and several web bars 3 in the middle. The web bars 3 on both sides are respectively connected between the upper chord steel bar 1 and the lower chord steel bar 2 on that side, so that a triangle is formed between the two web bars 3 and the concrete bottom plate 6. The upper chord steel bar 1 and the web bars 3, and the lower chord steel bar 2 and the web bars 3 can be connected and fixed by bundling. The two lower chord steel bars 2 on the same truss steel bar are located outside the web bars 3 on the side where they are located, and the lower chord steel bar 2 is located above the force-bearing steel bar 4. In this embodiment, the spacing between two adjacent truss steel bars is 200-250mm, which is more densely arranged compared to the spacing of about 600mm in the prior art. The utility model replaces the transversely arranged support steel bars with the lower chord steel bars 2, and the lower chord steel bars 2 do not expose the concrete bottom plate 6, thereby preventing the transverse support steel bars from extending on both sides of the composite plate, so that no beard bars are formed on the sides of the concrete bottom plate 6. By setting the support steel bars 4 as an upwardly bent structure, the support steel bars 4 are prevented from extending on both ends of the composite plate to form beard bars.

[0017] The thickness of the concrete base plate 6 is 24-40 mm, which is significantly reduced compared with the prior art. Replacing the transversely arranged supporting steel bars with the lower chord steel bars 2 can also ensure the strength requirements of the entire composite plate, thereby avoiding the generation of beard bars. It plays a positive role in any link of production, transportation, stacking and construction.

Claims

1. A novel reinforced steel truss composite slab, comprising a concrete bottom slab (6), characterized in that: A fiber cloth (5) is arranged at the bottom of the concrete bottom plate (6), a plurality of stress-bearing steel bars (4) are arranged in an array along the width direction in the concrete bottom plate (6), both ends of the stress-bearing steel bars (4) are bent upward and exposed above the concrete bottom plate (6), a plurality of truss steel bars are arranged in an array along the length direction in the concrete bottom plate (6), each of the truss steel bars is composed of an upper chord steel bar (1) at the top, two lower chord steel bars (2) at the bottom, and a plurality of web steel bars (3) in the middle, the web steel bars (3) on both sides are respectively connected between the upper chord steel bar (1) and the lower chord steel bar (2) on the side, so that a triangle is formed between the two web steel bars (3) and the concrete bottom plate (6), the lower chord steel bar (2) is not exposed from the concrete bottom plate (6), so that no beard bars are formed on the side of the concrete bottom plate (6).

2. The novel reinforced steel truss composite plate according to claim 1 is characterized in that: The thickness of the concrete bottom plate (6) is 24-40 mm, and the unbent area of ​​the stressed steel bars (4) is completely buried inside the concrete bottom plate (6).

3. The novel reinforced steel truss composite plate according to claim 1 is characterized in that: Two lower chord steel bars (2) on the same truss steel bar are located outside the web bar steel bar (3) on the side where the two lower chord steel bars (2) are located, and the lower chord steel bars (2) are located above the force-bearing steel bars (4).

4. The novel reinforced steel truss composite plate according to claim 1 is characterized in that: The distance between two adjacent truss steel bars is 200-250 mm.

5. The novel reinforced steel truss composite plate according to claim 1 is characterized in that: The fiber cloth (5) is an alkali-resistant glass fiber mesh cloth or a crack-resistant fiber cloth.

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