Three-dimensional truss type sandwich heat preservation composite floor slab

Abstract

The utility model provides a three-dimensional truss type sandwich heat preservation composite floor slab which comprises a prefabricated bottom plate concrete layer, a heat preservation layer, a post-pouring concrete layer and a steel bar truss. The steel bar truss is a three-dimensional steel bar truss, the three-dimensional steel bar truss is composed of an upper chord steel bar, two lower chord steel bars and two web member steel bars, the web member steel bars are bent to be corrugated, wave crests are welded to the side faces of the upper chord steel bar, and wave troughs are welded to the lower chord steel bars. The upper chord steel bar and the two lower chord steel bars are arranged in an isosceles triangle shape; an opening is formed in the position, corresponding to the steel bar truss, of the heat preservation layer so that the heat preservation layer can avoid the steel bar truss, no heat preservation layer exists around the steel bar truss, and the post-pouring concrete layer surrounds the steel bar truss within the thickness range of the heat preservation layer and makes direct contact with the prefabricated bottom plate concrete layer. Therefore, it is guaranteed that the post-pouring concrete layer and the prefabricated bottom plate concrete layer have high shear resistance, and the overall structural strength of the sandwich heat preservation composite floor slab is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled buildings, in particular to a three-dimensional truss type sandwich insulation composite floor. Background Art

[0002] The country has higher and higher requirements for building energy conservation. In the past, only the exterior walls and roofs needed insulation, but now the floor slabs of each household also need insulation; therefore, each floor slab needs to be equipped with an insulation layer. According to the different locations of the insulation layer, there are two common construction methods: 1) The insulation layer is above the structural layer; 2) The insulation layer is below the structural layer. However, when the insulation layer is above the structural layer, because the insulation layer is generally made of relatively loose and soft materials, after the surface layer is made on it, the surface layer is prone to uneven force and cracks, resulting in poor user experience. In addition, when the building is renovated for the second time, the insulation layer is easily damaged by the user, affecting the energy-saving effect of the building; when the insulation layer is below the structural layer, in addition to being easily damaged, affecting the energy-saving effect, the adhesion with the plaster layer is limited, and the plaster layer is easy to fall off.

[0003] In response to the above problems, the idea of ​​embedding the thermal insulation performance of the floor slab into the structural system was proposed. Combined with the production and construction characteristics of the prefabricated composite floor slab, the thermal insulation layer was placed between the top and bottom plates of the composite floor slab to form a "sandwich". Figure 1 As shown, in the prior art 1 (CN106522440A), the sandwich insulation composite floor comprises a precast bottom slab concrete layer 2, a polystyrene particle fiber concrete precast bottom slab insulation layer 3 is arranged on the precast bottom slab concrete layer 2, and a post-cast layer 4 is arranged on the polystyrene particle fiber concrete precast bottom slab insulation layer 3. Among them, the precast bottom slab concrete layer 2 has a slab bottom steel bar 1, the post-cast layer 4 has a slab surface steel bar 6, and the lower end of the steel bar truss 5 is tied or welded to the slab bottom steel bar 1, and the upper end is tied or welded to the slab surface steel bar 6. Figure 2 As shown, in the prior art 2 (CN111980256A), the self-insulating composite floor comprises a prefabricated bottom plate layer 1, and a sandwich insulation layer 2 and a cast-in-place concrete layer are arranged in sequence above the prefabricated bottom plate layer 1; a steel truss is arranged between the prefabricated bottom plate layer 1 and the sandwich insulation layer 2; a shear key 4 with low thermal conductivity is arranged between the prefabricated bottom plate layer 1 and the cast-in-place concrete layer, and the shear key 4 is located between the prefabricated steel skeleton 102 and the cast-in-place steel skeleton 302.

[0004] It can be seen that in the prior art 1 and the prior art 2, the prefabricated slab layer and the cast-in-place layer are basically completely isolated by the insulation layer and are only connected by steel trusses or shear keys. Both the steel trusses and shear keys have limited strength. Although they can provide a certain shear resistance, they are generally difficult to meet the force transmission requirements between the prefabricated slab layer and the cast-in-place layer, and the overall structural strength is difficult to ensure. In addition, the prior art 2 needs to set up additional shear keys, which increases the construction cost and complicates the construction.

[0005] In view of this, it is indeed necessary to further improve the structure of the existing sandwich insulation composite floor slab to simply and effectively provide stronger shear resistance and improve the overall structural strength. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a three-dimensional truss-type sandwich insulation composite floor, so that the insulation layer is set away from the steel truss, and the post-poured concrete layer surrounds the steel truss within the thickness of the insulation layer and directly contacts the precast bottom slab concrete layer, thereby ensuring that the post-poured concrete layer and the precast bottom slab concrete layer have strong shear resistance, thereby improving the overall structural strength of the sandwich insulation composite floor.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a three-dimensional truss-type sandwich insulation composite floor, including a prefabricated bottom slab concrete layer, an insulation layer, a post-cast concrete layer and a steel truss; an insulation layer is arranged on the prefabricated bottom slab concrete layer, and a post-cast concrete layer is arranged on the insulation layer; a slab bottom steel bar is arranged in the prefabricated bottom slab concrete layer, and a slab surface steel bar is arranged in the post-cast concrete layer; the lower end of the steel truss is tied or welded to the slab bottom steel bar, and the upper end is tied or welded to the slab surface steel bar; the steel truss is a three-dimensional steel bar Truss, the three-dimensional steel truss consists of an upper chord steel bar, two lower chord steel bars and two web steel bars. The web steel bars are bent in a corrugated shape, the crest of the wave is welded to the side of the upper chord steel bar, and the trough of the wave is welded to the lower chord steel bar. The upper chord steel bars and the lower chord steel bars are arranged in an isosceles triangle. Openings are provided on the insulation layer corresponding to the steel truss to allow the insulation layer to avoid the steel truss, so that there is no insulation layer around the steel truss. The post-poured concrete layer surrounds the steel truss within the thickness of the insulation layer and is in direct contact with the precast bottom slab concrete layer.

[0008] Furthermore, the thermal insulation layer is a plate material with good thermal insulation effect, and the thermal insulation layer is constructed by paving, avoiding the webs of the three-dimensional truss steel bars during paving.

[0009] Furthermore, it also includes pipelines, which are arranged in the post-cast concrete layer above the insulation layer.

[0010] Based on the above design, the utility model has the following beneficial effects:

[0011] The setting of the insulation layer avoids the steel truss, and the post-poured concrete layer surrounds the three-dimensional steel truss within the thickness of the insulation layer and directly contacts the precast base slab concrete layer. The overall stress performance is better, and the three-dimensional steel truss is wrapped by concrete, and its stability is guaranteed. The concrete within the thickness of the insulation layer can also participate in the structural stress, which can greatly improve the mechanical properties of the structure, thereby ensuring that the post-poured concrete layer and the precast base slab concrete layer have strong shear resistance, thereby improving the overall structural strength of the sandwich insulation composite floor.

[0012] No additional shear-resistant devices are required during the construction process, making construction more convenient and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 It is a structural schematic diagram of prior art 1;

[0015] Figure 2 It is a structural schematic diagram of prior art 2;

[0016] Figure 3 This is a schematic diagram of the structure of the sandwich insulation composite floor slab of the utility model;

[0017] Figure 4 It is a partial section of the sandwich thermal insulation composite floor slab of the utility model.

[0018] A three-dimensional truss-type sandwich insulation composite floor 10; a prefabricated bottom slab concrete layer 11; a slab bottom steel bar 111; an insulation layer 12; a post-cast concrete layer 13; a slab surface steel bar 131; a steel bar truss 14; an upper chord steel bar 141; a lower chord steel bar 142; a web bar steel bar 143; and an opening 15. DETAILED DESCRIPTION

[0019] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0020] The following describes the implementation methods of the present invention through specific concrete examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the utility model, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0022] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0023] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0024] At the same time, in this specification, descriptions involving orientations, such as up, down, left, right, front, back, inside, outside, longitudinal, lateral, vertical, horizontal, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0025] Furthermore, in the description of this specification, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense.

[0026] like Figure 3 and 4 As shown, the three-dimensional truss-type sandwich insulation composite floor 10 of the utility model comprises a precast bottom slab concrete layer 11, an insulation layer 12, a post-cast concrete layer 13 and a steel truss 14; the insulation layer 12 is arranged on the precast bottom slab concrete layer 11, and the post-cast concrete layer 13 is arranged on the insulation layer 12; the precast bottom slab concrete layer 11 is provided with a slab bottom steel bar 111, and the post-cast concrete layer 13 is provided with a slab surface steel bar 131; the lower end of the steel truss 14 is tied or welded to the slab bottom steel bar 111, and the upper end is tied or welded to the slab surface steel bar 131.

[0027] The steel bar truss 14 is a three-dimensional steel bar truss 14, which is composed of an upper chord steel bar 141, two lower chord steel bars 142 and two web steel bars 143. The web steel bars 143 are bent into a corrugated shape, with the crest welded to the side of the upper chord steel bar 141 and the trough welded to the lower chord steel bar 142. The upper chord steel bar 141 and the two lower chord steel bars 142 are arranged in an isosceles triangle.

[0028] Openings 15 are provided on the insulation layer 12 corresponding to the steel trusses 14 so that the insulation layer 12 avoids the steel trusses 14, so that there is no insulation layer 12 around the steel trusses 14, and the post-cast concrete layer 13 surrounds the steel trusses 14 within the thickness of the insulation layer 12 and directly contacts the precast base plate concrete layer 11.

[0029] Preferably, the thermal insulation layer 12 is a plate material with good thermal insulation effect, and the thermal insulation layer is constructed by paving, avoiding the webs of the three-dimensional truss steel bars during paving.

[0030] Preferably, the three-dimensional truss-type sandwich insulation composite floor 10 further includes pipelines (not shown), which are arranged in the post-cast concrete layer 13 above the insulation layer.

[0031] Preferably, the pipeline can be arranged in the longitudinal spacing space formed by the insulation layer.

[0032] Preferably, the opening 15 on the thermal insulation layer 12 is in the shape of an elongated strip, and may also be in the shape of a circle or a rectangle as required.

[0033] Preferably, the precast base slab concrete layer 11 is roughened or steel bars are implanted on the exposed surface where no insulation layer is provided around the steel trusses 14, so as to enhance the connection strength between the post-cast concrete layer 13 and the precast base slab concrete layer 11 after pouring the post-cast concrete layer 13, and further enhance the shear resistance.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A three-dimensional truss-type sandwich insulation composite floor (10), comprising a precast bottom slab concrete layer (11), an insulation layer (12), a post-cast concrete layer (13) and a steel truss (14); the insulation layer (12) is arranged on the precast bottom slab concrete layer (11), and the post-cast concrete layer (13) is arranged on the insulation layer (12); a slab bottom steel bar (111) is arranged in the precast bottom slab concrete layer (11), and a slab surface steel bar (131) is arranged in the post-cast concrete layer (13); the lower end of the steel truss (14) is tied or welded to the slab bottom steel bar (111), and the upper end is tied or welded to the slab surface steel bar (131); Features: The steel bar truss (14) is a three-dimensional steel bar truss (14), which is composed of an upper chord steel bar (141), two lower chord steel bars (142) and two web steel bars (143), wherein the web steel bars (143) are bent in a corrugated shape, wherein the crest of the wave is welded to the side of the upper chord steel bar (141), and the trough of the wave is welded to the lower chord steel bar (142); the upper chord steel bar (141) and the two lower chord steel bars (142) are arranged in an isosceles triangle; An opening (15) is provided on the insulation layer (12) at a position corresponding to the steel truss (14) so ​​that the insulation layer (12) avoids the steel truss (14), so that there is no insulation layer (12) around the steel truss (14), and the post-cast concrete layer (13) surrounds the steel truss (14) within the thickness range of the insulation layer (12) and directly contacts the precast bottom slab concrete layer (11); The thermal insulation layer (12) is a plate material with good thermal insulation effect. The thermal insulation layer (12) is constructed by paving, and the web steel bars (143) of the three-dimensional steel bar truss (14) are avoided during paving.

2. The three-dimensional truss-type sandwich insulation composite floor according to claim 1 is characterized in that: It also includes pipelines, which are arranged in a post-cast concrete layer (13) above the thermal insulation layer (12).

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