Reserved pre-buried structure free of steel bar planting

Abstract

The utility model relates to the technical field of building construction, and discloses a rebar-planting-free reserved embedded structure which comprises additional rebars, reserved rebars and a built-in extruded sheet, the built-in extruded sheet is provided with a cavity, the section of the built-in extruded sheet is in a U shape, and the multiple reserved rebars are arranged on the built-in extruded sheet in a penetrating mode. And the additional steel bars are bound on one side, deviating from the cavity, of the embedded extruded sheet through steel wires. According to the utility model, the dependence of the built-in extruded sheet on the specific position of the reinforcing steel bar on the primary structure reinforcing steel bar net rack can be reduced, so that the built-in extruded sheet can be more conveniently mounted by a worker; the concrete and the extruded sheet can be compactly connected, so that the slurry flowing and leakage phenomena are avoided; after pouring, the embedded extruded sheet can be taken out, the steel embedding consumption can be reduced, and the construction cost is reduced; through the arrangement of the comb-tooth-shaped chiseling-free protrusions, the chiseling construction procedure can be omitted when secondary structure steel bar net rack concrete is constructed, and the construction speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a pre-embedded structure free of reinforcing bars. Background Art

[0002] Due to structural load-bearing, construction technology, construction procedures and other reasons, some structures need to be constructed after the existing structure is completed. This type of secondary construction structure is often designed as reinforced concrete, and the steel bars need to be effectively connected to the original structure. When the original structure is constructed, closed formwork is generally used for construction quality and efficiency. When the secondary construction structure is constructed, the steel bars are connected by embedding. The construction quality of each step of the structural embedding process needs to be strictly controlled, otherwise it is easy to cause quality problems, affect the actual stress of the secondary construction structure, and cause the original structure and the secondary construction structure to be loosely connected. The structural embedding construction steps are cumbersome and the construction quality requirements are high. In general, the construction workload is large, the construction period is long, the construction efficiency is slow, and the construction cost is increased.

[0003] In the prior art, a Chinese invention patent with announcement number CN114109035B provides a secondary rebar-free embedded box and a construction method thereof, including an embedded box, the embedded box including a bottom plate, the two sides of the bottom plate are respectively bent to form side plates, a plurality of rows of embedded steel bars are penetrated on the bottom plate, the anchor ends of the embedded steel bars are exposed from the embedded box, and the lap ends of the embedded steel bars are bent inside the embedded box. This patent has the effect of making the connection between the primary structure steel grid and the secondary structure steel grid more firmly. However, the disadvantage is that the embedded box in the device cannot be taken out after the concrete is poured, that is, each construction requires a steel plate embedded box to be left in the concrete, resulting in high construction costs, and the embedded box and the primary structure steel grid are greatly restricted when fixed, making it inconvenient to fix. Utility Model Content

[0004] The utility model aims to provide a pre-embedded structure without rebar planting, so as to solve the problems in the prior art that the pre-embedded plate cannot be taken out after the concrete solidifies and the pre-embedded plate is inconvenient to fix to the primary structure steel bar grid.

[0005] The utility model is achieved through the following technical scheme: a pre-buried structure free of rebar, comprising additional steel bars, reserved steel bars, and an embedded extruded board, wherein the embedded extruded board has a cavity and a "匚"-shaped cross-section, a plurality of reserved steel bars are interspersed on the embedded extruded board, and the insertion direction of the reserved steel bars is consistent with the opening direction of the embedded extruded board; the additional steel bars are bound to the side of the embedded extruded board away from the cavity by steel wire; the additional steel bars are bound to the primary structure steel grid by steel wire.

[0006] In order to better implement the present utility model, further, anti-chiseling protrusions are provided on the outer side surfaces of the embedded extruded plastic boards, and the anti-chiseling protrusions are in a comb shape.

[0007] In order to better implement the present utility model, further, the reserved steel bars include a reserved steel bar anchorage section and a reserved steel bar lapping section. The reserved steel bar anchorage section and the reserved steel bar lapping section are vertically arranged, so that the reserved steel bars are in an "L" shape; the reserved steel bar anchorage section passes through the embedded extruded plastic board, and the reserved steel bar lapping section is placed in the cavity.

[0008] In order to better implement the present utility model, further, the thickness of the embedded extruded plastic board is equal to the sum of the concrete cover thickness in the primary structure steel bar grid and the diameter of the transverse steel bars.

[0009] In order to better implement the present utility model, further, the height of the embedded extruded plastic board is equal to the spacing between adjacent transverse steel bars in the primary structure steel bar grid.

[0010] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0011] (1) By providing additional steel bars and using the additional steel bars as an intermediate medium, the present utility model reduces the dependence of the embedded extruded plastic board on the specific positions of the steel bars on the primary structure steel bar grid, making it more convenient for the staff to install the embedded extruded plastic board.

[0012] (2) By setting the material of the embedded extruded plastic board as a flexible extruded plastic board, when the primary structure steel bar grid is poured with concrete, the concrete is closely connected with the extruded plastic board, avoiding the phenomenon of slurry flowing and leakage; after pouring, the embedded extruded plastic board can be taken out. On the one hand, it can provide a larger operation space for the connection between the reserved steel bars and the secondary structure steel bar grid, and on the other hand, it can reduce the consumption of embedded steel and reduce the construction cost.

[0013] (3) By providing comb-shaped anti-chiseling protrusions, since the concrete is in close contact with the embedded extruded plastic board, when the embedded extruded plastic board is taken out, the concrete here will form a comb-shaped concrete interface corresponding to the anti-chiseling protrusions. When constructing the concrete of the secondary structure steel bar grid, the chiseling construction process can be omitted, accelerating the construction speed.

[0014] (4) By adopting a binding connection method to connect the steel bars in the primary structure steel bar grid, the structure itself will not be damaged, and the survival rate of the embedded steel bars is relatively high, making the structural connection between the steel bars more firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model from a rear view angle.

[0017] Among them: 1-additional steel bars; 2-reserved steel bars; 3-embedded extruded board; 4-primary structural steel grid; 21-reserved steel bar anchoring section; 22-reserved steel bar lap section; 31-protrusions to avoid roughening; 32-cavity. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Embodiment 1:

[0020] This embodiment provides a pre-embedded structure free of reinforcing bars. Figure 1 , Figure 2 As shown, it includes additional steel bars 1, reserved steel bars 2, and embedded extruded boards 3. The embedded extruded boards 3 have cavities 32 and are in the shape of "匚" in cross section. A plurality of reserved steel bars 2 are inserted on the embedded extruded boards 3, and the insertion direction of the reserved steel bars 2 is consistent with the opening direction of the embedded extruded boards 3. The additional steel bars 1 are bound to the side of the embedded extruded boards 3 away from the cavity 32 by steel wires, and the laying direction of the additional steel bars 1 is parallel to the embedded extruded boards 3. The additional steel bars 1 are bound to the primary structural steel grid 4 by steel wires. The additional steel bars 1 are made of waste steel bars.

[0021] During construction, the primary structural steel bar grid 4 is first tied up, and then multiple reserved steel bars 2 are inserted one by one on the embedded extruded board 3 according to the spacing and position required by the specific design. At this time, the length of the reserved steel bars 2 in the cavity 32 is the lap length, and the length of the reserved steel bars 2 outside the embedded extruded board 3 is the anchoring length; thereafter, the additional steel bars 1 are tied to the vertical steel bar grid on the primary structural steel bar grid 4 with steel wire, and then the embedded extruded board 3 with the reserved steel bars 2 fixed is fixed to the additional steel bars 1 with steel wire. At this time, the reserved steel bars 2 are in the steel bar gaps on the primary structural steel bar grid 4, so that the reserved steel bars 2 and the steel bars in the primary structural steel bar grid 4 are fixedly connected as a whole, and then the template on the primary structural steel bar grid 4 is closed, and at the same time, the template also closes the opening on the embedded extruded board 3, and then concrete is poured. When the concrete strength meets the requirements, the formwork is removed, the reserved steel bars 2 are slightly adjusted, and the embedded extruded board 3 is taken out. At this time, the reserved steel bars 2 can be connected with the steel bars of the secondary structure steel grid, and then the formwork is supported to cast the secondary structure steel grid concrete.

[0022] In summary, by setting the additional steel bars 1 and using the additional steel bars 1 as an intermediate medium, the dependence of the embedded extruded polystyrene board 3 on the specific positions of the steel bars on the primary structural steel bar grid 4 is reduced, making it more convenient for the staff to install the embedded extruded polystyrene board 3; by setting the material of the embedded extruded polystyrene board 3 as a flexible extruded polystyrene board, after the concrete is poured into the primary structural steel bar grid 4, the embedded extruded polystyrene board 3 can still be removed. On the one hand, it can provide space for the connection between the reserved steel bars 2 and the secondary structural steel bar grid, and on the other hand, it can also reduce the consumption of buried steel and reduce the construction cost.

[0023] Embodiment 2:

[0024] This embodiment is further extended on the basis of Embodiment 1, specifically as Figure 2 shown, anti-chiseling protrusions 31 are provided on the outer side surfaces of the embedded extruded polystyrene boards 3, and the anti-chiseling protrusions 31 are in a comb shape.

[0025] During the concrete pouring, since the concrete is in close contact with the embedded extruded polystyrene board 3, when the embedded extruded polystyrene board 3 is removed, the concrete here will form a comb-shaped concrete interface corresponding to the anti-chiseling protrusions 31. When constructing the concrete of the secondary structural steel bar grid, the construction process of chiseling can be omitted, and the construction speed can be accelerated.

[0026] In another specific embodiment, as Figure 2 shown, the reserved steel bars 2 include a reserved steel bar anchorage section 21 and a reserved steel bar lapping section 22. The reserved steel bar anchorage section 21 and the reserved steel bar lapping section 22 are vertically arranged, making the reserved steel bars 2 in an "L" shape; the reserved steel bar anchorage section 21 passes through the embedded extruded polystyrene board 3, and the reserved steel bar lapping section 22 is placed in the cavity 32.

[0027] The length of the reserved steel bar anchorage section 21 is the anchorage length, and the length of the reserved steel bar lapping section 22 is the lapping length. Before inserting the reserved steel bars 2 through the embedded extruded polystyrene board 3, the reserved steel bars 2 are bent according to the predetermined requirements, so that the reserved steel bar lapping section 22 forms a ninety-degree angle with the reserved steel bar anchorage section 21, and the reserved steel bar lapping section 22 is adjusted to be parallel to the embedded extruded polystyrene board 3. This facilitates the subsequent connection between the reserved steel bar lapping section 22 and the steel bars in the secondary structural steel bar grid.

[0028] In another specific embodiment, the thickness of the embedded extruded polystyrene board 3 is equal to the sum of the concrete cover thickness in the primary structural steel bar grid 4 and the diameter of the transverse steel bars. This setting can ensure that the opening of the embedded extruded polystyrene board 3 is just sealed together when the primary structural steel bar grid 4 is closed, without the need to deliberately seal it again, effectively preventing the concrete from entering the cavity 32.

[0029] In another specific embodiment, the height of the embedded extruded plastic board 3 is equal to the spacing between adjacent transverse steel bars in the primary structural steel bar grid 4. This setting can prevent the embedded extruded plastic board 3 from not being installed between two adjacent transverse steel bars in the primary structural steel bar grid 4. And due to this height setting, the embedded extruded plastic board 3 can be more firmly bound to the vertical steel bar grid in the primary structural steel bar grid 4 through the additional steel bars 1, improving the fixing strength.

[0030] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A pre-embedded structure without reinforcing bar, characterized in that: It includes additional steel bars (1), reserved steel bars (2), and an embedded extruded polystyrene board (3). The embedded extruded polystyrene board (3) has a cavity (32) and a "U"-shaped cross-section. A plurality of reserved steel bars (2) are inserted through the embedded extruded polystyrene board (3), and the insertion direction of the reserved steel bars (2) is the same as the opening direction of the embedded extruded polystyrene board (3); the additional steel bars (1) are bound to the side of the embedded extruded polystyrene board (3) away from the cavity (32) by steel wires; the additional steel bars (1) are bound to the primary structural steel bar grid (4) by steel wires.

2. The pre-embedded structure without rebar planting according to claim 1 is characterized in that: Anti-chiseling protrusions (31) are provided on the outer side surface of the embedded extruded polystyrene board (3), and the anti-chiseling protrusions (31) are in a comb shape.

3. The pre-embedded structure without rebar planting according to claim 1 is characterized in that: The reserved steel bars (2) include a reserved steel bar anchorage section (21) and a reserved steel bar lapping section (22). The reserved steel bar anchorage section (21) and the reserved steel bar lapping section (22) are vertically arranged so that the reserved steel bars (2) are in an "L" shape; the reserved steel bar anchorage section (21) passes through the embedded extruded polystyrene board (3), and the reserved steel bar lapping section (22) is placed in the cavity (32).

4. The pre-embedded structure without rebar planting according to claim 1 is characterized in that: The thickness of the embedded extruded polystyrene board (3) is equal to the sum of the concrete cover thickness in the primary structural steel bar grid (4) and the diameter of the transverse steel bars.

5. The pre-embedded structure without rebar planting according to claim 1 is characterized in that: The height of the embedded extruded polystyrene board (3) is equal to the spacing between adjacent transverse steel bars in the primary structural steel bar grid (4).

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