Concrete floor

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a concrete floor. The concrete floor slab comprises a post-cast strip; the supporting assembly is arranged in the post-cast strip, the supporting assembly comprises a pair of pressing plates which are in clearance fit, the two ends of the pair of pressing plates are flexibly connected so that one pressing plate can move towards the other pressing plate, at least one cavity is formed between the pair of pressing plates, the cavities are filled with flexible structures, and the flexible structures are arranged in the cavities. The pair of pressing plates is suitable for sealing the gap and the cavity through flexible connection. When concrete is solidified, tension is generated, the pair of pressing plates are stressed to move towards the two sides correspondingly, when the pressing plates move, the stress can be conducted to the flexible structure, the flexible structure can absorb the stress, and the situation that the concrete of the post-cast strip cracks due to stress release is avoided. The later water leakage risk is greatly reduced, the construction time is shortened, and the construction steps are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering, in particular to a concrete floor slab. Background Art

[0002] A post-cast strip is a concrete strip left at the corresponding positions of the foundation slab, wall, or beam in accordance with design or construction specifications to prevent harmful cracks that may be caused by uneven shrinkage or settlement of the reinforced concrete structure during construction.

[0003] In the prior art, the location of the post-casting strip of the floor slab needs to be reserved in advance, and the formwork frame at the bottom of the post-casting strip is retained. After the concrete structure is poured and cured for 45 days, the concrete of the post-casting strip can be poured. However, this construction method takes a long time to construct, which has a great impact on rush projects. At the same time, after the concrete on both sides of the post-casting strip is poured, it needs to be protected, cleaned and roughened before the post-casting strip can be poured, which increases the construction volume and construction time. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is that the construction time of the post-cast strip construction method of the floor slab is relatively long, which has a great impact on the rush project. At the same time, after the concrete on both sides of the post-cast strip is poured, it needs to be protected, cleaned and roughened before the post-cast strip can be poured, which increases the construction volume and the construction time, thereby providing a concrete floor slab.

[0005] In order to solve the above problems, the utility model provides a concrete floor slab, comprising:

[0006] Post-cast strip;

[0007] A support assembly is arranged in the post-casting strip, and the support assembly includes a pair of pressure plates with clearance fit, the two ends of the pair of pressure plates are flexibly connected so that one of the pressure plates can move toward the other pressure plate, at least one cavity is constructed between the pair of pressure plates, and the cavity is filled with a flexible structure, and the pair of pressure plates are suitable for sealing the gap and the cavity through a flexible connection.

[0008] Furthermore, the opposite sides of a pair of the pressing plates have a lubricating coating.

[0009] Furthermore, it also includes:

[0010] At least two partition structures are provided, the two partition structures are parallel to the direction of gravity, the two partition structures are respectively connected to a pair of pressure plates, one side of the partition structure is connected to the side of the pressure plate facing away from the other pressure plate, and the partition structure is suitable for separating the concrete of the post-cast zone so that the partition structure is constructed as a stress-bearing zone.

[0011] Furthermore, the partition structure is located on one side of the cavity.

[0012] Furthermore, it also includes:

[0013] A limiting bracket is fixedly connected to the lower layer of steel bars of the post-cast strip, and a pair of pressing plates are arranged on the limiting bracket so that the limiting bracket can limit the pair of pressing plates during pouring.

[0014] Furthermore, the flexible structure is Eps particles.

[0015] Furthermore, the partition structure is a polystyrene board.

[0016] Furthermore, one side surface of the separation structure is bonded to a side surface of the pressing plate.

[0017] Furthermore, lubricant is applied to opposite sides of a pair of the pressure plates to form the lubricating coating.

[0018] Furthermore, a support assembly is provided at the bottom of the post-cast strip, and the support assembly includes a bottom plate formwork.

[0019] The utility model has the following advantages:

[0020] The utility model discloses a concrete floor slab. A pair of gap-matched pressing plates are arranged in a post-cast strip. Flexible connections at both ends of the pair of pressing plates can prevent concrete from entering the gap. At the same time, the flexible connection can enable one pressing plate to be moved toward the other pressing plate under force during casting. A cavity is provided between the pair of pressing plates, and a flexible structure is filled in the cavity. Therefore, when the concrete solidifies, the concrete generates tensile forces to both sides. The pair of pressing plates are respectively moved to both sides under force. When the pressing plates move, the stress can be transmitted to the flexible structure. The flexible structure can absorb the stress to avoid cracking of the post-cast strip concrete caused by stress release. By adopting the concrete floor slab of the present application, the post-cast strip and the concrete structures on both sides can be cast simultaneously, which greatly reduces the construction time and the construction steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of a concrete floor in an embodiment of the utility model;

[0023] Figure 2This is a schematic diagram of the structure of the post-casting strip in the embodiment of the utility model;

[0024] Description of reference numerals:

[0025] 1. Post-cast strip; 2. Press plate; 3. Cavity; 4. Flexible structure; 5. Partition structure; 6. Limit bracket; 7. Lower steel bar; 8. Support assembly. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] like Figure 1 and Figure 2 As shown, this embodiment discloses a concrete floor slab, including: a post-cast strip 1 and a support assembly 8. The support assembly 8 is arranged in the post-cast strip 1, and the support assembly 8 includes a pair of gap-matched pressing plates 2, both ends of the pair of pressing plates 2 are flexibly connected so that one pressing plate 2 can move toward the other pressing plate 2, at least one cavity 3 is constructed between the pair of pressing plates 2, and the cavity 3 is filled with a flexible structure 4, and the pair of pressing plates 2 are suitable for sealing the gap and the cavity 3 through the flexible connection.

[0031] Specifically, the concrete floor slab also includes concrete structures on both sides of the post-cast strip 1. A pair of gap-matched pressure plates 2, lower steel bars 7 and upper steel bars are arranged in the post-cast strip 1. The pair of pressure plates 2 are arranged between the upper steel bars and the lower steel bars 7. Both ends of the pair of pressure plates 2 are flexibly connected to seal the gap between the pressure plates 2. At the same time, one pressure plate 2 can move toward the other pressure plate 2 when subjected to the pressure of concrete. The flexible connection can prevent the middle part of the pressure plate 2 from being deformed due to the pressure of concrete. At least one cavity 3 can be constructed between the pair of pressure plates 2, and the cavity 3 is filled with a flexible structure 4. After the post-cast strip 1 is poured, the concrete will shrink unevenly during the hardening process. The steel bar is an elastic-plastic material with a certain ability to resist deformation. It can withstand the stress caused by the uneven shrinkage of the concrete. The floor slab concrete shrinks and generates tensile stress on both sides. The pair of pressure plates 2 move toward the sides respectively under the action of the tensile stress. Figure 2 The flexible structure 4 in the cavity 3 is moved to the left and right sides, and squeezes the flexible structure 4 in the cavity 3, so that the flexible structure 4 is deformed to resist the shrinkage stress, thereby consuming the tensile stress generated by the concrete, thereby preventing the concrete of the post-cast zone 1 from cracking or deforming.

[0032] Preferably, in this embodiment, the two ends of a pair of pressing plates 2 are connected by adhesive tape, three cavities 3 are constructed between the pair of pressing plates 2, and the three cavities 3 are filled with flexible structures 4 to resist tensile stress. In other optional embodiments, the two ends of a pair of pressing plates 2 are connected by elastic structures such as rubber pads and films, and one, two, or other number of cavities 3 can be constructed between the pair of pressing plates 2.

[0033] Furthermore, the flexible structure 4 is Eps particles.

[0034] Furthermore, the opposite sides of the pair of pressure plates 2 have lubricating coatings (not shown).

[0035] Furthermore, lubricants are applied to the opposite sides of the pair of pressing plates 2 to form a lubricating coating. The pair of pressing plates 2 can reduce friction through the lubricating coating, and can quickly move to both sides when subjected to tensile stress, to prevent the concrete from cracking due to excessive friction and inability to move.

[0036] Furthermore, it also includes: at least two partition structures 5, the two partition structures 5 are parallel to the direction of gravity, the two partition structures 5 are respectively connected to a pair of pressure plates 2, one side of the partition structure 5 is connected to the side of the pressure plate 2 away from the other pressure plate 2, and the partition structure 5 is suitable for separating the concrete of the post-cast zone 1 so that the partition structure 5 is constructed as a stress-bearing belt.

[0037] Furthermore, the partition structure 5 is located on one side of the cavity 3 .

[0038] Specifically, Figure 2As shown, in this embodiment, there are two partition structures 5, which are respectively connected to a pair of pressing plates 2, and the side surfaces of the partition structures 5 are connected to the side surfaces of the pressing plates 2 away from the other pressing plates 2, and the partition structures 5 are located on one side of the cavity 3.

[0039] Preferably, in this embodiment, the partition structure 5 is a polystyrene board.

[0040] In the initial stage of tensile stress, the stress-bearing belt constructed of polystyrene boards is used to guide the stress deformation, so that a pair of pressure plates 2 can slide against each other and the cavity 3 between the pressure plates 2 can elastically deform to resist the shrinkage stress. When the load is large, the stress-bearing belt constructed of polystyrene boards can produce deformation cracks at the weak position of the positive angle at the connection between the polystyrene board and the pressure plate 2. During normal working, the cracks do not extend to the building surface layer, and the concrete belt joint is working normally, which will not affect the performance of the post-cast belt 1.

[0041] Furthermore, one side of the partition structure 5 is bonded to the side of the pressing plate 2 .

[0042] Further, such as Figure 2 As shown, it also includes: a limit bracket 6. The limit bracket 6 is fixedly connected to the lower layer of steel bars 7 of the post-casting strip 1, and a pair of pressing plates 2 are arranged on the limit bracket 6 so that the limit bracket 6 can limit the pair of pressing plates 2 during pouring. The limit bracket 6 is welded and fixed to the lower layer of steel bars 7, and a pair of pressing plates 2 are placed between the limit brackets. The limit bracket 6 can limit the pressing plates 2 to prevent the pressing plates 2 from being forced to move away from their working positions during pouring, causing systemic problems.

[0043] Furthermore, a support assembly 8 is provided at the bottom of the post-cast strip 1, and the support assembly 8 includes a slab bottom template. The slab bottom template can be removed after the concrete of the post-cast strip 1 is finalized.

[0044] The concrete floor slab disclosed in this embodiment produces uneven shrinkage during the concrete hardening process after pouring. The steel bar is an elastic-plastic material with a certain ability to resist deformation and can withstand the stress caused by the uneven shrinkage of the concrete. The floor slab concrete shrinks and produces tensile stress on both sides. In the initial stage of stress, the stress-bearing belt constructed of polystyrene boards is used to guide the stress deformation. The mutual sliding between the pressure plates 2 and the elastic deformation of the cavity 3 between the pressure plates 2 resist the shrinkage stress. When the load is large, the stress-bearing belt constructed of polystyrene boards is used to produce deformation cracks at the weak position of the positive angle at the connection between the polystyrene board and the pressure plate 2. During normal operation, the cracks do not extend to the building surface layer, and the concrete belt seam is working in a normal state.

[0045] The concrete floor slab disclosed in this embodiment can resist earthquake load to a certain extent. The floor slab bears earthquake force, that is, the floor slab bears repeated tensile and compressive loads. When the floor slab is subjected to tensile force, the tensile force on the concrete is disconnected from the weak band of the polystyrene board, and the load energy is consumed through the tensile deformation of the cavity 3 and the horizontal force on the steel bars. The ultimate load is the ultimate bearing capacity of the steel bars of the floor slab; when the floor slab is subjected to lateral extrusion force, the ultimate deformation generated is the width of the weak band of the polystyrene board. After the load deformation is greater than the width of the weak band, extrusion deformation will occur between the concrete of the floor slab surface layer, and extrusion damage will occur after exceeding the compressive bearing capacity of the concrete. The interior of the floor slab can use the extrusion deformation of the cavity 3 to consume the lateral extrusion load, increase the deformation limit of the concrete floor slab, and ensure that the floor slab can be used normally under the action of a small range of external loads, avoid the occurrence of vertical through cracks in the concrete floor slab, and ensure the integrity of the floor slab.

[0046] By adopting the concrete floor slab disclosed in this embodiment, the construction scheme of the post-casting strip 1 in the prior art can be eliminated, and the post-casting strip 1 and the concrete structure on both sides of the post-casting strip 1 can be directly cast at the same time, reducing the construction time. The pressing plate 2 can well ensure the waterproof performance and effectively solve the hidden danger of water leakage in the post-casting strip 1. The post-casting strip 1 is located at the part of the structure with the least stress. Through directional guidance, the cavity 3 of the pressing plate 2 is deformed to consume shrinkage stress and uneven settlement, thereby ensuring the safe use of the concrete structure of the post-casting strip 1.

[0047] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A concrete floor slab, characterized in that: include: Post-cast strip (1); A support assembly (8) is arranged in the post-casting strip (1), and the support assembly (8) includes a pair of pressure plates (2) with clearance fit, the two ends of the pair of pressure plates (2) are flexibly connected so that one of the pressure plates (2) can move toward the other pressure plate (2), at least one cavity (3) is constructed between the pair of pressure plates (2), and the cavity (3) is filled with a flexible structure (4), and the pair of pressure plates (2) are suitable for sealing the gap and the cavity (3) through a flexible connection.

2. The concrete floor slab according to claim 1, characterized in that: The opposite sides of a pair of pressure plates (2) are provided with a lubricating coating.

3. The concrete floor slab according to claim 1, characterized in that: Also includes: At least two partition structures (5), the two partition structures (5) are parallel to the direction of gravity, the two partition structures (5) are respectively connected to a pair of pressure plates (2), one side of the partition structure (5) is connected to the side of the pressure plate (2) facing away from the other pressure plate (2), and the partition structure (5) is suitable for separating the concrete of the post-cast strip (1) so that the partition structure (5) is constructed as a stress-bearing strip.

4. The concrete floor slab according to claim 3, characterized in that: The partition structure (5) is located on one side of the cavity (3).

5. The concrete floor slab according to claim 1, characterized in that: Also includes: A limiting bracket (6), wherein the limiting bracket (6) is fixedly connected to the lower layer of steel bars (7) of the post-cast strip (1), and a pair of pressing plates (2) are arranged on the limiting bracket (6) so that the limiting bracket (6) limits the pair of pressing plates (2) during casting.

6. The concrete floor slab according to any one of claims 1 to 5, characterized in that: The flexible structure (4) is Eps particles.

7. The concrete floor slab according to claim 3, characterized in that: The partition structure (5) is a polystyrene board.

8. The concrete floor slab according to claim 7, characterized in that: One side of the partition structure (5) is bonded to the side of the pressing plate (2).

9. The concrete floor slab according to claim 2, characterized in that: Lubricant is applied to opposite sides of a pair of pressure plates (2) to form the lubricating coating.

10. The concrete floor slab according to claim 6, characterized in that: A support assembly (8) is provided at the bottom of the post-cast strip (1), and the support assembly (8) comprises a slab bottom formwork.

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