Composite floor

Abstract

The utility model provides a composite floor slab. The composite floor slab comprises a bottom die, the supporting beams are arranged below the bottom die; the side mold device is arranged on the side face of the bottom mold in a surrounding mode, the bottom mold, the side mold device and the multiple supporting beams are connected to form a composite floor frame with the closed bottom face and the open top face, the side mold device comprises at least one set of bases and flange plates which are integrally formed, and the bases are connected with the supporting beams arranged on the edges of the bottom mold through bolts and nuts; and at least one rib plate is arranged between each group of base and the flange plate for strengthening. The base and the flange plate which are integrally formed are installed to improve the side face bearing capacity of the composite floor slab frame, lateral impact during concrete pouring is better borne, the welding workload is reduced through connection of the bolts and the nuts, and the hidden danger that a composite floor slab deforms due to welding is reduced. The utility model has the beneficial effects that the welding workload is reduced, the construction efficiency and the construction quality are improved, and the construction cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of floor slab construction, and particularly relates to a composite floor slab. Background Art

[0002] With the development of steel structures, the structural form of using profiled steel sheet-concrete composite floor slabs as the floor slab system of buildings is increasing. By combining the characteristics of concrete and profiled steel sheets, their common action can give play to good mechanical properties and deformation capabilities, forming a floor slab system with good effects and high economic performance.

[0003] In the existing technology, the profiled steel sheet is regarded as the permanent formwork (bottom formwork) of the concrete floor slab, and thin steel sheets are mostly used as the side formwork. However, the stiffness of the thin steel sheet itself is not enough to withstand the lateral force during concrete pouring, and it is prone to deformation, resulting in uneven sides of the floor slab. In severe cases, even the formwork explosion phenomenon may occur. Secondly, the conventional side formwork is usually fixed on the steel beam by welding, which has the disadvantages of large welding amount, high requirements for the operation skills of construction workers, and easy heat deformation of surrounding materials such as steel beams due to a large amount of welding. There are technical problems such as insufficient bearing capacity and stability of the formwork system, and large welding workload affecting construction efficiency and quality. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a composite floor slab, which is especially suitable for high-quality and high-efficiency construction of profiled steel sheet-concrete composite floor slabs.

[0005] The technical solution adopted by the utility model is: a composite floor slab, including a bottom formwork; a plurality of support beams, which are all arranged below the bottom formwork to support; a side formwork device, which surrounds the side of the bottom formwork. The bottom formwork, the side formwork device and the plurality of support beams are connected to each other to form a composite floor slab frame with a closed bottom surface and an open top surface. The side formwork device includes at least one group of connected base and baffle plate. The base is connected to the support beam arranged at the edge of the bottom formwork through bolts and nuts. The base and the baffle plate are integrally formed; a plurality of steel bars are erected above the bottom formwork and concrete is poured to form a concrete layer laid in the composite floor slab frame.

[0006] Furthermore, at least one rib plate is arranged between each group of base and baffle plate to strengthen.

[0007] Furthermore, the base is vertically connected to the baffle plate. Each rib plate is a right-angled triangular plate with two sides that can be connected to the base and the baffle plate. A notch is arranged at the right angle of each rib plate to reduce stress.

[0008] Furthermore, a plurality of connection holes are opened on each base, and a plurality of lifting holes are opened on each support beam connected to the base. At least two connection holes can correspond to the lifting holes to insert bolts.

[0009] Furthermore, the bottom formwork is a profiled steel sheet with alternately arranged wave crests and wave troughs.

[0010] Furthermore, the supporting beam is an I-shaped steel beam.

[0011] The advantages and positive effects of the present utility model are as follows: By adopting the above technical solution, the bearing capacity of the formwork system for lateral forces during concrete pouring can be improved. At the same time, the welding workload is reduced, the welding cost is lowered, and the potential hazard of affecting the construction quality due to the welding differences of different construction workers can be reduced; by reducing the welding workload, not only is the construction process more environmentally friendly, but also the potential hazard of the floor slab frame deforming due to heat during the welding process can be reduced; the operation is simple and convenient, the construction efficiency can be improved, and the disadvantages of insufficient stiffness and stability of the conventional side formwork can be solved; it has the advantages of simple structure, improved construction efficiency, reduced construction cost, and guaranteed construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional structural schematic diagram of the side formwork device in an embodiment of the present utility model

[0013] Figure 2 is a front structural schematic diagram of the position of the side formwork device in an embodiment of the present utility model

[0014] Figure 3 is an embodiment of the present utility model along Figure 2 a sectional structural schematic diagram at A in

[0015] Figure 4 is an embodiment of the present utility model along Figure 2 a sectional structural schematic diagram at B in

[0016] Figure 5 is a structural schematic diagram of the profiled steel sheet in an embodiment of the present utility model

[0017] Figure 6 is a structural schematic diagram of the supporting beam in an embodiment of the present utility model

[0018] In the figure:

[0019] 1, bottom formwork; 2, supporting beam; 21, lifting hole

[0020] 31, base; 32, retaining plate; 33, bolt

[0021] 34, rib plate; 311, connecting hole; 341, notch

[0022] 4, steel bar; 5, stud DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The embodiments of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments.

[0024] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar units or units with the same or similar functions throughout.

[0025] The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model. In the description of the present utility model, it should be understood that terms such as "installation", "connection", "fixation", etc. should be understood in a broad sense, which can be direct connection, installation or fixation, or indirect connection, installation or fixation. The present utility model does not limit this.

[0026] In the description of the present utility model, it should be understood that terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the structure or unit referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0027] As Figures 1 to 6 shown, a schematic diagram of an embodiment of a composite floor slab of the present utility model includes a bottom formwork 1; a plurality of support beams 2, which are all arranged below the bottom formwork 1 for support; a side formwork device, which surrounds the side of the bottom formwork 1. The bottom formwork 1, the side formwork device and the plurality of support beams 2 are connected to each other to form a composite floor slab frame with a closed bottom surface and an open top surface. The side formwork device includes at least one set of connected base 31 and baffle plate 32. The base 31 is connected to the support beam 2 provided at the edge of the bottom formwork 1 by bolts 33 and nuts. The base 31 and the baffle plate 32 are integrally formed and can be bent from the same metal plate. In this embodiment, a steel plate is selected for bending and manufacturing; a plurality of steel bars 4 are erected above the bottom formwork 1 and concrete is poured to form a concrete layer laid in the composite floor slab frame.

[0028] In this embodiment, the base 31 is connected to the support beam 2 provided at the edge of the bottom mold 1 through bolts 33 and nuts, and can be further strengthened by spot welding. Compared with the traditional method of only connecting to the support beam 2 by welding, the amount of welding work can be greatly reduced, the welding cost can be reduced, the construction process is more environmentally friendly, and rapid installation can be carried out through the threaded positioning connection and spot welding reinforcement method. The operation is simple, the construction difficulty is reduced, the hidden danger of the welding difference of construction workers affecting the construction quality is reduced, and at the same time, the construction efficiency can be improved, and the hidden danger of the support beam 2 or the side mold being deformed by heat during the welding process can be reduced. The base 31 and the edge guard plate 32 are formed by bending the same metal plate, and the integrally formed design can improve the bearing capacity of the composite floor frame during concrete pouring, better withstand the lateral force during concrete pouring, reduce deformation, ensure the smoothness of the floor side, improve the construction quality, and thus reduce the maintenance cost.

[0029] In this embodiment, the support beam 2 is an I-shaped steel beam, and the construction materials are common and easy to popularize.

[0030] In this embodiment, at least one rib plate 34 is provided between each group of the base 31 and the edge guard plate 32 for strengthening. In this embodiment, the number of rib plates 34 is one, which is provided at the middle position of the base 31 along its length direction to improve stability; in other embodiments, the number of rib plates 34 can also be designed as multiple according to the length of the edge guard plate 32 as required. When the number of rib plates 34 is multiple, they can be evenly spaced along the length direction of the base 31. The design of the rib plate 34 can better improve the stiffness to withstand the lateral force during concrete pouring, prevent the edge guard plate 32 from deforming, and improve the construction quality.

[0031] In this embodiment, the base 31 is perpendicularly connected to the edge guard plate 32, and each rib plate 34 is a right-angled triangular plate whose two sides can be connected to the base 31 and the edge guard plate 32. The connection method can be realized by welding and other methods. A notch 341 is provided at the right angle of each rib plate 34 to reduce the stress effect.

[0032] Each base 31 is provided with a plurality of connection holes 311, and each support beam 2 connected to the base 31 is provided with a plurality of lifting holes 21. At least two connection holes 311 can correspond to the lifting holes for inserting bolts 33. In this embodiment, the number of connection holes 311 provided on each base 31 is two, which can not only meet the function of connection and fixation, but also ensure the strength of the base 31. The two connection holes 311 are symmetrically arranged on both sides of the rib plate 31. Each support beam 2 connected to the base 31 is provided with four lifting holes 21. The four lifting holes 21 can be used for hoisting, and two of them can also correspond to the connection holes 311 for inserting bolts 33; in other embodiments, the number of connection holes 311 and lifting holes 21 can be adaptively adjusted according to the specific construction scenario. By providing a plurality of connection holes 311 and lifting holes 21, rapid positioning can be achieved, the installation efficiency of the construction can be improved, and it is convenient for construction workers to operate.

[0033] In this embodiment, the bottom formwork 1 is a profiled steel sheet alternately provided with wave crests and wave troughs. The profiled steel sheet with alternating convex and concave parts is used as the bottom formwork 1 and cast together with concrete. A plurality of steel bars 4 arranged vertically and horizontally can be arranged at the wave crests and wave troughs of the profiled steel sheet and at the upper and lower positions of the preset concrete layer. The support beam 2 can be arranged at the wave trough of the profiled steel sheet and fit with the bottom surface of the profiled steel sheet. Studs 5 can also be welded to the top surface of the profiled steel sheet where it overlaps with the support beam 2. During the later concrete pouring, the concrete layer and the profiled steel sheet can be better integrated through the studs 5. For the composite floor slab of profiled steel sheet and concrete, the characteristics of light weight, high stiffness, large load-bearing capacity and good seismic resistance of the profiled steel sheet can be utilized to cancel the traditional wooden formwork support system.

[0034] The specific construction process of this embodiment is as follows:

[0035] The side formwork device can be designed simultaneously with the support beam 2 and the bottom formwork 1 and prefabricated in the factory. After the positions of the multiple connection holes 311 of the base 1 and the multiple lifting holes 21 of the support beam 2 are compounded according to the construction design, the holes are drilled.

[0036] Before installation, the side formwork device, the support beam 2 and the bottom formwork 1 are pre-assembled, and it is checked whether the dimensions, shapes, etc. meet the design requirements, and the bent and deformed parts are corrected accordingly or abnormal parts are screened out and removed.

[0037] During installation, the top surface of the support beam 2 should be kept clean, and moisture or wet paint should be strictly prevented. According to the requirements of the construction drawings, accurately place the profiled steel sheet and the side formwork device. At the same time, pay attention to the level of the support beam 2 and the perpendicularity of each component, etc., to ensure the flatness of the composite floor slab as a whole. Specifically, before installing the side formwork device, mark the laying position line of the profiled steel sheet on the support beam 2 to prevent the clearance between the side formwork device and the profiled steel sheet from exceeding the specification. Then lay the side formwork device to ensure that the periphery of the side formwork device is tightly sealed and in smooth and tight contact with the surrounding structure. Connect each base 31 to the corresponding support beam 2 through bolts 33 and nuts to reduce the welding workload. During installation, pre-tightening and positioning can be carried out first, and then tightening can be carried out after the composite is completed. Spot welding reinforcement can also be carried out between the base 1 and the support beam 2. When there is a vertical gap between the end of the profiled steel sheet close to the side formwork device and the support beam 2, it can be blocked by increasing the width of the base, and at the same time pressing the base 31 tightly against the profiled steel sheet or inserting the base 31 into the gap between the profiled steel sheet and the support beam 2. When there is a gap in the horizontal splicing between the side formwork device and the profiled steel sheet, the gap can be blocked by pressing the top surface of the support beam 2 tightly against the base 31 and the bottom surface of the bottom formwork 1 at the same time, forming a composite floor slab frame with a closed bottom surface. When assembling the side formwork device and the bottom formwork 1, try to be as close as possible to reduce the gap. During the actual installation process, if there are unmatched connection holes 311, they can be blocked by fitting with the top surface of the support beam 2 and other methods. The unmatched lifting holes 21 can also be blocked by fitting with the bottom formwork 1 and other methods, thereby forming a composite floor slab frame with a blocked bottom surface. Place and tie multiple steel bars 4 on the bottom formwork 1 and then pour concrete. Through the integrally formed base 31 and the edge guard plate 32, the side bearing capacity of the composite floor slab frame during concrete pouring can be improved.

[0038] The materials selected for the present utility model are common at the construction site, which is convenient for popularization; the structure is simple, which can improve the bearing capacity of the formwork system for lateral forces during concrete pouring, reduce the welding workload at the same time, lower the welding cost, and reduce the potential hazard that the welding differences of different construction workers affect the construction quality; by reducing the welding workload, not only the construction process is more environmentally friendly, but also the potential hazard that the support beam 2 and the side formwork device are deformed by heat during welding can be reduced; the operation is simple and convenient, which can improve the construction efficiency, solve the disadvantages of insufficient stiffness and stability of the conventional side formwork, ensure the construction quality, and reduce the maintenance cost.

[0039] The above has described the embodiments of the present utility model in detail, but the content described is only the preferred embodiments of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A composite floor slab, characterized in that, Comprising: Bottom formwork; A plurality of supporting beams, all of which are arranged below the bottom formwork for support; Side formwork device, which surrounds the side of the bottom formwork. The bottom formwork, the side formwork device and the plurality of supporting beams are interconnected to form a composite floor slab frame with a closed bottom surface and an open top surface. The side formwork device includes at least one set of interconnected base and baffle plate. The base is connected to the supporting beam arranged at the edge of the bottom formwork by bolts and nuts. The base and the baffle plate are integrally formed; A plurality of steel bars are erected above the bottom formwork and concrete is poured to form a concrete layer laid in the composite floor slab frame.

2. The composite floor slab according to claim 1, characterized in that: At least one rib plate is arranged between each group of the base and the baffle plate for strengthening.

3. The composite floor slab according to claim 2, wherein: The base is vertically connected to the baffle plate. Each rib plate is a right-angled triangular plate with two sides that can be connected to the base and the baffle plate. A notch is provided at the right angle of each rib plate to reduce stress.

4. The composite floor slab according to any one of claims 1-3, characterized in that: Each base is provided with a plurality of connection holes, and each supporting beam connected to the base is provided with a plurality of lifting holes. At least two of the connection holes can correspond to the lifting holes for inserting the bolts.

5. The composite floor slab according to claim 1, wherein: The bottom formwork is a profiled steel sheet alternately provided with wave crests and wave troughs.

6. The composite floor slab according to claim 1, wherein: The supporting beam is an I-shaped steel beam.

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