Bottom formwork and steel bar truss floor support plate

Abstract

The embodiment of the utility model provides a bottom formwork and a steel bar truss floor support plate. The steel bar truss floor support plate comprises a steel bar truss, the bottom formwork and a connecting assembly for connecting the steel bar truss to the bottom formwork. The bottom formwork comprises a plate body, a supporting rib, a connecting part and a supported rib, the plate body is provided with two opposite sides, one side of the plate body is connected with the supporting rib, the other side of the plate body is connected with the connecting part, and the side, away from the plate body, of the connecting part is connected with the supported rib. The supported ribs of the upstream bottom formwork are in lap joint with the supporting ribs of the downstream bottom formwork so that lap joint connection between every two adjacent bottom formworks can be achieved, and the distance between every two adjacent steel bar trusses on every two adjacent bottom formworks can be a preset distance through the connecting parts. The reinforcing structures abutting against the supported ribs are arranged on the sides, deviating from the plate body, of the supporting ribs, so that the supporting ribs have enough supporting strength and are short in length, plate materials can be reduced, and more cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, and in particular to bottom formwork and steel truss floor decking. Background Technology

[0002] Currently, the main type of removable bottom formwork for reinforced concrete truss floor slabs on the market uses bamboo plywood. After removal, the bamboo plywood must be returned to the factory for cleaning and reuse. Over time, this type of reusable formwork material has become increasingly common, with inconsistent quality, increasing management difficulty and quality control risks. The second most common type of removable bottom formwork uses profiled steel sheets, which are disposable and do not need to be returned to the factory. To ensure sufficient strength during the overlap of the bottom formwork and prevent grout leakage after concrete pouring, which could lead to uneven floor surfaces, the common practice is to increase the length of the overlap ribs between adjacent bottom formwork sections. However, this increases the amount of material used in the bottom formwork, raising costs for companies. Summary of the Invention

[0003] In view of the above problems, embodiments of the present invention are proposed. The purpose of the embodiments of the present invention is to provide a bottom formwork that can ensure the lap strength between two adjacent bottom formworks, and uses less material at the lap joint, resulting in low cost.

[0004] To achieve this objective, the embodiments of the present invention adopt the following technical solutions:

[0005] A base template, comprising:

[0006] A plate with two opposing sides;

[0007] A supporting rib is connected to one side of the plate.

[0008] The connecting part is connected to the other side of the plate; and

[0009] The supported rib is connected to the side of the connecting portion opposite to the plate body;

[0010] The supported rib of the downstream bottom template overlaps the supporting rib of the upstream bottom template;

[0011] The supporting rib has a reinforcing structure on the side opposite to the plate that abuts against the supported rib.

[0012] Optionally, the supported rib includes a connected convex rib and a concave rib, the concave rib being located at the free end of the supported rib;

[0013] The supporting rib also includes a supporting concave rib that abuts against the concave rib, the supporting concave rib being connected to the reinforcing structure, and the reinforcing structure abutting against the convex rib.

[0014] Alternatively, the reinforcing structure includes:

[0015] A reinforcing rib is folded towards the convex rib, the concave rib is attached to the reinforcing rib at the connection point with the convex rib, and the top of the reinforcing rib abuts against the convex rib.

[0016] Optionally, the reinforcing structure further includes:

[0017] The detachable edge is connected to the reinforcing rib, and the detachable edge is coplanar with the bottom surface of the supporting concave rib.

[0018] Alternatively, the reinforcing structure includes:

[0019] Multiple hypotenuses connected in sequence, with an acute angle between any two adjacent hypotenuses;

[0020] The inclined side connected to the supporting concave rib is the fitting side, and the connection between the convex rib and the concave rib fits and abuts against the fitting side.

[0021] Alternatively, the inclined surface away from the supporting rib is a disassembly edge, which slopes downward toward the side away from the plate and has an operating distance from the connecting part.

[0022] Optionally, the reinforcing structure further includes:

[0023] A supporting surface that fits against the top surface of the rib;

[0024] The supporting surface is connected to the inclined side away from the supporting concave rib, and the side of the supporting surface away from the inclined side is aligned with the top boundary of the convex rib.

[0025] Optionally, the enhanced architecture also includes:

[0026] The detached edge is connected to the side of the supporting surface away from the inclined side;

[0027] The disassembly edge forms an acute angle with the supporting surface, and there is an operating gap between the disassembly edge and the connecting part.

[0028] Alternatively, the two ends of the reinforcing structure may be flattened.

[0029] Optionally, the connecting portion includes a plurality of sequentially connected convex ribs and concave ribs, wherein the number of concave ribs is one more than the number of convex ribs.

[0030] Alternatively,

[0031] The plate is provided with a plurality of protruding mounting ribs at intervals, and the connectors are installed on the mounting ribs;

[0032] The mounting ribs on both sides of the plate are respectively connected to the concave ribs and the supporting concave ribs on the connecting part that are away from the supported ribs.

[0033] Optionally, the two ends of the mounting rib are flattened.

[0034] Another objective of this invention is to provide a steel truss floor deck with high lap strength between two adjacent bottom formworks, less material usage, and lower cost.

[0035] To achieve this objective, the embodiments of the present invention adopt the following technical solutions:

[0036] A steel truss floor deck, comprising:

[0037] Steel truss;

[0038] The base template is the aforementioned base template, and multiple base templates are sequentially fitted and overlapped; and

[0039] A connecting component, located between the steel truss and the bottom formwork, is used to connect the steel truss to the bottom formwork.

[0040] The technical solution provided by the embodiments of the present invention, by setting a connecting part, maintains a preset distance between two adjacent steel trusses located at the overlap of two adjacent bottom formworks. By providing a reinforcing structure on the support rib, the support rib not only has sufficient support strength but also has a short length, thereby reducing the amount of sheet material used and saving costs. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figures 1a to 1c This is a schematic diagram of a bottom template with different reinforcement structures provided in an embodiment of the present invention;

[0043] Figures 2-5 This is a schematic diagram of the stress on a bottom template with different reinforcement structures provided in an embodiment of the present invention;

[0044] Figures 6-7 This is a schematic diagram showing the concrete forces acting on the existing bottom formwork.

[0045] Figure 8 This is a schematic diagram of a structure in which the supported ribs are inclined, according to an embodiment of the present invention.

[0046] Figure 9 This is a schematic diagram of a structure in which the connecting part and the supported rib are inclined at an angle according to an embodiment of the present invention.

[0047] Figures 10-11 This is a schematic diagram of the structure of a bottom template and connecting components with different reinforcement structures and different models provided in an embodiment of the present invention;

[0048] Figure 12 This is a structural schematic diagram of a steel truss floor deck provided in an embodiment of the present invention;

[0049] Figures 13-16 This is a schematic diagram of the structure of the connecting component in one embodiment of this application.

[0050] In the picture:

[0051] 10. Bottom formwork; 20. Connecting components; 30. Steel truss; 40. Fasteners;

[0052] 11. Supported rib; 111. Protruding rib; 112. Concave rib; 113. Top end; 12. Supporting rib; 120. Reinforcing structure; 121. Reinforcing rib; 122. Disassembly edge; 123. Beveled edge; 124. Supporting surface; 102. Supporting concave rib; 13. Connection part; 14. Plate body; 141. Mounting rib;

[0053] 210. Metal connector; 211. Bearing part; 212. Side bearing foot; 213. Middle bearing foot; 220. Support; 221. Snap-fit ​​connector; 222. Support base; 223. Connecting hole;

[0054] 31. Top chord reinforcement; 32. Web reinforcement; 33. Bottom chord reinforcement. Detailed Implementation

[0055] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0056] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0059] Please refer to Figures 1a to 1c This application provides a bottom template 10, which includes a plate 14, supporting ribs 12, connecting portions 13, and supported ribs 11. The plate 14 has two opposing sides, one side of which is connected to the supporting ribs 12, and the other side is connected to the connecting portions 13. The side of the connecting portions 13 away from the plate 14 is connected to the supported ribs 11. Please refer to... Figure 2 and Figure 4 As shown, the supported rib 11 of the downstream bottom formwork 10 overlaps with the supported rib 12 of the upstream bottom formwork 10. The supported rib 12 of the upstream bottom formwork 10 not only provides strength support for the downstream bottom formwork 10, but also enables the overlapping connection between two adjacent bottom formworks 10. The distance between two adjacent installation bars 141 containing the connecting part 13 is equal to the distance between any two adjacent installation bars 141. In some embodiments of this application, the length of the connecting part 13 is the distance between any two adjacent installation bars 141, thereby making the multiple steel trusses on the steel truss floor deck evenly spaced, with uniform stress and a more aesthetically pleasing appearance. The side of the supported rib 12 away from the plate body 14 is provided with a reinforcing structure 120 that abuts against the supported rib 11. The strength of the reinforcing structure 120 is higher than the strength of other parts of the supported rib 11, so that the supported rib 12 not only has sufficient support strength but is also short in length. Compared with a supported rib 12 that achieves the same support strength without the reinforcing structure 120, less material is used, resulting in greater cost savings.

[0060] Further, please refer to Figures 1a to 1cAs shown, in some embodiments of this application, the supported rib 11 includes connected protruding ribs 111 and concave ribs 112. The tail of one of the protruding ribs 111 and the head of the other is connected. The concave rib 112 is located at the free end of the supported rib 11, that is, along the plate 14 towards the supported rib 11. The protruding rib 111 is connected to the connecting portion 13, and the concave rib 112 is connected to the side of the protruding rib 111 away from the connecting portion 13, resembling a sine wave shape. The protruding ribs 111 and concave ribs 112 not only increase the structural strength of the overlapping side, but also form an accommodating space with an upward or downward opening. Here, "upward" or "downward" refers to... Figure 3 The diagram shown represents the standard upper or lower section. The support rib 12 also includes a supporting concave rib 102 that abuts against the concave rib 112. The supporting concave rib 102 is connected to the reinforcing structure 120, which abuts against the protruding rib 111. The concave rib 112 is housed within the upward-opening accommodating space of the supporting concave rib 102 and abuts against it, forming an interlocking structure. Since one side of the supporting concave rib 102 is connected to the plate 14 and the other side is connected to the reinforcing structure 120, it not only provides good support for the concave rib 112 but also serves as a limiting element when two adjacent bottom formwork 10 overlap.

[0061] Please refer to some embodiments of this application. Figure 1c and Figure 2 As shown, the reinforcing structure 120 includes a reinforcing rib 121 located within the downward-opening accommodating space of the protruding rib 111. The reinforcing rib 121 is folded towards the top surface of the protruding rib 111, meaning that the reinforcing rib 121 includes two connected and fitted support plates, making the reinforcing rib 121 a superimposed and fitted structure to enhance its structural strength. The support plate at the connection between the concave rib 112 and the protruding rib 111, and at the connection between the reinforcing rib 121 and the supporting concave rib 102, is fitted together. In other words, the support plate at the connection between the reinforcing rib 121 and the supporting concave rib 102 is the sidewall of the supporting concave rib 102 away from the plate body 14. The top of the reinforcing rib 121 abuts against the protruding rib 111, meaning that the upper ends of the two adjacent support plates are supported on the lower side of the top surface of the protruding rib 111, providing sufficient strength support for the protruding rib 111.

[0062] For steel truss floor slabs with removable bottom formwork, the bottom formwork must be removed after concrete pouring. For easier removal of the bottom formwork 10, please refer to [reference needed]. Figure 2 and Figure 3As shown, in some embodiments of this application, the reinforcing structure 120 further includes a disassembly edge 122. The disassembly edge 122 is connected to the side of the reinforcing rib 121 away from the plate 14. There is an operating distance between the disassembly edge 122 and the connecting part 13. The bottom surface of the disassembly edge 122 is coplanar with the bottom surface of the supporting concave rib 102. The distance between the disassembly edge 122 and the top surface of the convex rib 111 is relatively large, which facilitates the passage of pliers. The pliers can clamp the disassembly edge 122 by the operating distance and the distance between the disassembly edge 122 and the top surface of the convex rib 111, and move the disassembly edge 122 downward together to realize the separation of the supporting rib 12 and the supported rib 11. The structure is simple and the operation is convenient.

[0063] In other embodiments of this application, please refer to Figures 1a-1b As shown, another possible structure for the reinforcing structure 120 includes multiple sequentially connected inclined sides 123, with an acute angle between adjacent inclined sides 123, meaning that adjacent inclined sides 123 form a V-shape. The upward-opening V-shapes and downward-opening V-shapes are alternately connected, and there is a gap between the apexes of the multiple downward-opening V-shapes. This allows the supporting force provided by the reinforcing structure 120 to the rib 111 to be evenly distributed, resulting in better support strength. Among the multiple inclined sides 123, the inclined side 123 connected to the supporting concave rib 102 is the fitting edge. The connection between the rib 111 and the concave rib 112 is in close contact with the fitting edge, allowing the rib 111 to be supported from the edge of the top surface, thus obtaining a wider support range and ensuring a good support effect for the rib 111 of the supported rib 11. The number of V-shaped structures with an upper opening and a lower opening is determined according to the actual situation. There may be one V-shaped structure with an upper opening and one V-shaped structure with a lower opening, as long as the strength requirements and the unfolded size requirements are met. This application does not make specific limitations.

[0064] Further, please refer to Figure 1a As shown, in some embodiments of this application, the inclined surface away from the supporting concave rib 102 is the disassembly edge 122. The disassembly edge 122 slopes downward toward the side away from the plate body 14 and has an operating distance between it and the connecting part 13. At this time, the disassembly edge 122 and the adjacent inclined surface 123 form a downward-opening V-shape. The lower opening of the V-shape and the operating distance can accommodate the two teeth of the pliers, so that the disassembly edge 122 is accommodated in the jaws of the pliers. After the pliers clamp the disassembly edge 122, they can move it toward the direction away from the protruding rib 111 to separate the supporting rib 12 from the supported rib 11, which is easy to operate.

[0065] In some embodiments of this application, only a small number of V-shaped structures are needed to meet the strength requirements, such as a V-shaped structure with a bottom opening and two V-shaped structures with top openings on the left and right sides. There is a certain distance between the reinforcing structure 120 and the connecting portion 13, and there is no support at this distance. Therefore, to ensure the stability of the support, please refer to... Figure 1b As shown, the reinforcing structure 120 also includes a supporting surface 124, which is connected to the inclined side 123 away from the supporting concave rib 102 and is in contact with the top surface of the convex rib 111. In addition, the side of the supporting surface 124 away from the inclined side 123 is aligned with the top surface boundary of the convex rib 111, so that the entire top surface of the convex rib 111 can be supported to ensure good support.

[0066] In this configuration, the disassembly edge 122 of the reinforcing structure 120 connects to the side of the supporting surface 124 away from the inclined side 123. The disassembly edge 122 is inclined towards the side away from the connecting part 13, creating an acute angle between the disassembly edge 122 and the supporting surface 124, thus providing an operating gap between the disassembly edge 122 and the operating part. A pry bar can be used, with its plug inserted into the bend of the pry bar at the operating gap, abutting against the side wall of the protruding rib 111 to form a fulcrum, thereby prying the supporting rib 12 and the supported rib 11 apart. Alternatively, pliers can be used on the disassembly edge 122, taking advantage of the distance between the disassembly edge 122 and the inclined side 123 and the operating gap, to pull the supporting rib 12 and the supported rib 11 apart.

[0067] For the stress distribution between the supporting rib 12 and the supported rib 11 after the concrete is poured for the reinforcing structure 120 schemes in the above three embodiments, please refer to [the relevant documentation]. Figures 2-5 As shown, there is a support point A between the protruding rib 111 and the concave rib 112 of the supported rib 11. The force exerted by the concrete on point A will be decomposed into a vertically downward force F. y And F along the horizontal direction x Compared to Figure 6 The first scheme shown in the previous example, although the force exerted by the concrete on point A in the first scheme is also divided into F along the vertical downward direction. y And F along the horizontal direction x However, due to the presence of the reinforcing structure 120, the horizontal resistance of this embodiment is greater than that of the first conventional embodiment. Compared to... Figure 7 The second conventional scheme, as shown, will apply horizontal forces to two points A by concrete, resulting in two points A generating horizontal resistance. However, due to the presence of the reinforcing structure 120 in this application, one horizontal resistance in this application is equivalent to two horizontal resistances in the second scheme. However, compared to the second conventional scheme, the unfolded area of ​​the support rib 12 in this application is smaller, thus saving more sheet material and reducing costs.

[0068] Since the steel truss floor deck needs to be poured with concrete to form the floor deck after the concrete solidifies, in order to provide good support for the concrete, please refer to some embodiments of this application. Figures 1a to 1c As shown, the connecting part 13 also includes a plurality of sequentially connected convex ribs 111 and concave ribs 112. The convex ribs 111 and concave ribs 112 of the connecting part 13 can be the same as the convex ribs 111 and concave ribs 112 of the supported rib 11. Since the convex ribs 111 of the supported rib 11 are connected to the connecting part 13, the concave ribs 112 are connected to the convex ribs 111 of the supported rib 11 on the connecting part 13.

[0069] Please refer to some embodiments of this application. Figures 1a to 1c As shown, the plate 14 is provided with multiple raised mounting ribs 141 at intervals. Connectors are installed on the mounting ribs 141. The mounting ribs 141 not only provide good support strength but also increase the distance between the bottom of the connector and the plate 14, promoting concrete flow and filling, making it easier for the connector to be encased in concrete. Mounting ribs 141 are present on both sides of the plate 14, which not only improves the strength of the sides of the plate 14 but also increases the support strength of the supporting ribs 12 and the supported ribs 11. Since the connecting part 13 is connected to the mounting ribs 141, the side of the connecting part 13 away from the supported rib 11 is a concave rib 112. The concave rib 112 is connected to the mounting ribs 141, so the number of concave ribs 112 on the connecting part 13 is one more than the number of raised ribs 111.

[0070] It should be noted that the terms "convex rib 111" and "concave rib 112" are relative. The convex rib 111 and concave rib 112 can be formed simultaneously by roll forming, or one of them can be roll formed while the other remains an untreated flat surface. Taking the convex rib 111 as an example, it can be understood that the support rib 12 before the formation of the convex rib 111 or concave rib 112 is a flat surface. When multiple convex ribs 111 are formed by roll forming at intervals on the flat surface, the untreated flat surface between two adjacent convex ribs 111 forms a concave rib 112 relative to the convex rib 111.

[0071] The vertical distance difference *m* between the raised rib 111 and the recessed rib 112 cannot be too small to ensure sufficient structural strength. However, *a* cannot be too large either, as this would increase the difficulty of decoration at the bottom of the floor slab and negatively affect the flatness of the floor slab after the cement has dried. Therefore, in some embodiments of this application, 3.0 mm < *m* ≤ 7 mm, where *m* can be 3.0 mm, 4.0 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, or 7 mm, as long as it meets the range requirement. This embodiment does not impose specific limitations. The width of the raised rib 111 and the recessed rib 112 is between 15 mm and 25 mm to avoid localized dense unevenness in the floor slab after the concrete has dried, which would affect the aesthetics of the floor slab. The shape of the raised rib 111 and the concave rib 112 is not limited. The shape of the raised rib 111 and the concave rib 112 shown in this case is a trapezoidal groove, but it can also be other shapes, such as an open (elliptical) arc shape, or a shape similar to a sine wave. The different shapes of the raised rib 111 and the concave rib 112 will result in different rigidity of the bottom formwork 10, but the different shapes enrich the effect of the bottom of the floor slab.

[0072] To prevent concrete mortar from entering from the free end of the supported rib 11 and reduce the risk of concrete mortar leakage, please refer to some embodiments of this application. Figures 1a to 1c as well as Figure 2 , Figure 4 As shown, the free end of the supported rib 11 is the abutment 113, which is inclined upward. The highest point of the abutment 113 is flush with the mounting surface of the mounting rib 141 and abuts against the connecting component. At this time, there is no gap between the free end of the supported rib 11 and the connecting component. The joint between the abutment 113 and the supported rib 11 is sealed by the connecting component. Thus, during the concrete pouring process, due to the limiting and blocking effect of the connecting component, the concrete mortar will not enter from the joint between the abutment 113 and the supported rib 11. The structure is simple.

[0073] Furthermore, in order to ensure that the supported rib 11 and the supporting rib 12 fit together and abut against each other after overlapping, in some embodiments of this application, the supported rib 11 and the connecting portion 13 are inclined downwards at an angle θ1 towards the horizontal line. Please refer to [reference needed]. Figure 8 Since the supported rib 11 is located above the supporting rib 12, when the supported rib 11 tilts downwards towards the horizontal line, it will theoretically interfere with the horizontally positioned supporting rib 12. However, because the supporting rib 12 has a certain degree of resilience, they can still overlap and interlock. At this time, the supported rib 11 will exert a rebound force on the supporting rib 12 as it tilts downwards towards the horizontal line, while the supporting rib 12 will provide resistance to the rebound force on the supported rib 11, thus making the support rib 12 and the supported rib 11 fit more tightly. Similarly, in some embodiments, please refer to... Figure 9Alternatively, the supporting rib 12 can be tilted upwards at an angle θ2 towards the horizontal line, while the supported rib 11 remains horizontal. In some embodiments, the supported rib 11 can be tilted downwards at an angle θ1 towards the horizontal line, and the supporting rib 12 can be tilted upwards at an angle θ2 towards the horizontal line. The tilted arrangement of both the supported rib 11 and the supporting rib 12 facilitates a horizontal alignment after overlapping. Furthermore, 0° < θ1 = θ2 ≤ 3°, thereby ensuring the flatness of the overlapped supported rib 11 and the supporting rib 12.

[0074] During construction, to prevent grout leakage at both ends of the protruding rib 111 and the reinforcing structure 120 along their length, the ends of the protruding rib 111 and the reinforcing structure 120 can be flattened on a pressing device to avoid grout leakage. As for the supported rib 11, in order to ensure the overlap with the supporting rib 12, the ends of the supported rib 11 are not flattened, while the reinforcing structure 120 is flattened to avoid grout leakage. Here, flattening means that it is on the same horizontal line as the trough.

[0075] In some embodiments of this application, the bottom template 10 includes three models, please refer to... Figures 10-12 As shown, the first model can be equipped with three steel trusses 30, with a preferred effective width of 600mm and a selectable spacing of 200mm for the steel trusses; the third model can be equipped with four steel trusses, with a selectable effective width of 800mm and a preferred spacing of 200mm for the steel trusses; the fourth model can be equipped with five steel trusses, with a selectable effective width of 1000mm and a preferred spacing of 200mm for the steel trusses. In practical applications, the corresponding model of bottom formwork 10 can be selected according to the actual situation.

[0076] This embodiment also provides a steel truss floor deck with a removable bottom formwork; please refer to [reference needed]. Figure 12 As shown, the removable bottom formwork steel truss 30 floor deck includes a steel truss 30, a bottom formwork 10, and connecting components 20 that connect the steel truss 30 and the bottom formwork 10. The bottom formwork 10 is the same as described above. Multiple connecting components 20 are spaced apart on the steel truss 30. The steel truss 30 includes an upper chord steel bar 31, two lower chord steel bars 33 located on both sides below the upper chord steel bar 31, and web steel bars 32 whose ends are fixedly connected to the upper chord steel bar 31 and the lower chord steel bar 33, respectively. Along the axial direction of the lower chord steel bar 33, each lower chord steel bar 33 is connected to the bearing portion 211 at the top of the multiple connecting components 20 to achieve locking between the connecting components 20 and the steel truss 30, preventing slippage between the steel truss 30 and the connecting components 20. Furthermore, this increases the stiffness of the floor deck during construction, thereby reducing the deformation of the bottom formwork 10 during construction and giving the floor deck better bottom flatness.

[0077] Furthermore, depending on different needs, steel trusses 30 of different specifications can be selected. The specifications of the top chord reinforcement 31, bottom chord reinforcement 33, and web reinforcement 32 of different specifications of steel trusses 30 can also differ. For example, the diameter of the bottom chord reinforcement 33 can be selected within a range of 6-14mm, depending on different requirements. The types of top chord reinforcement 31, bottom chord reinforcement 33, and web reinforcement 32 of different specifications of steel trusses 30 can also differ, and even the types of top chord reinforcement 31, bottom chord reinforcement 33, and web reinforcement 32 of the same steel truss 30 can be different. For example, the reinforcement can be plain round steel bars, ribbed steel bars, etc.

[0078] In other embodiments of this application, please refer to Figures 10-16 As shown, the connecting assembly 20 includes a connector and a fastener 40. The fastener 40 passes through the bottom template 10 and is screwed onto the connector to connect the bottom template 10 and the connector, facilitating installation and disassembly. Please refer to... Figures 10-11 As shown, the connector can be injection molded from plastic. The injection-molded connector has a snap-fit ​​groove at one end facing the steel truss. Two lower chord steel bars 33 are accommodated in the snap-fit ​​groove and abut against their respective groove walls. The distance between the two groove walls is slightly smaller than the distance between the two lower chord steel bars 33, allowing the steel truss to be stably snapped onto the connector. Alternatively, the connector can have a side-opening receiving groove for accommodating the lower chord steel bars 33 on one side facing the steel truss 30, and an upward-opening clamping groove on the other side. The root of the groove wall facing the receiving groove can elastically deform. After one lower chord steel bar 33 of the steel truss 30 is accommodated in the receiving groove, the other lower chord steel bar 33 is located at the opening of the clamping groove. When a downward force is applied to the steel truss 30, the lower chord steel bar 33 will compress the groove wall, causing the root of the groove wall to elastically deform and enter the clamping groove, thus facilitating the connection between the steel truss 30 and the connector.

[0079] In other embodiments of this application, the connecting assembly 20 may also be a metal fold or a composite connector consisting of a metal fold and an injection-molded material. For details, please refer to... Figures 13-16The connecting assembly 20 includes a metal connector 210 and a support member 220. The metal connector 210 has a bearing portion 211 at its top end that connects to the steel truss 30, side bearing feet 212 on both sides of its bottom end, and a central bearing foot 213 at the center of its bottom end. The side bearing feet 212 and the central bearing foot 213 extend in the same or opposite directions along the horizontal direction. The support member 220 is injection molded between the central bearing foot 213 and the side bearing feet 212. When the side bearing feet 212 and the central bearing foot 213 extend in the same horizontal direction, there is an opening between them. During the injection molding process, the support member 220 extends through this opening to the upper and lower sides of the side bearing feet 212 and the central bearing foot 213. When the side support foot 212 and the middle support foot 213 extend in opposite directions along the horizontal direction, the support member 220 can bypass the adjacent ends of the side support foot 212 and the middle support foot 213 during the injection molding process and extend to the upper and lower sides of the side support foot 212 and the middle support foot 213. The middle support foot 213 and the side support foot 212 have a first surface and a second surface arranged opposite to each other. The bottom end of the support member 220 is a support base 222, and the top end is a snap connector 221. The snap connector 221 abuts against the first surface, and the support base 222 is lower than the second surface and abuts against the second surface, or the support base 222 is flush with the second surface, so that the support member 220 can be stably installed on the metal connector 210 and the strength of the metal connector 210 can be increased. The support base 222 has a connecting hole 223 at its bottom. The fastener 40 passes through the floor deck 14 and is screwed into the connecting hole 223 to lock the connecting component 20 to the bottom template 10 without penetrating the metal part of the metal connector 210. This eliminates the need for continuous, strong torque, simplifies operation, and does not damage the corrosion resistance of the screw caps on the fastener 40, ensuring its service life. Furthermore, the support 220 can enclose the fastener 40 through the connecting hole 223, preventing the fastener 40 from being exposed and isolating it from the outside environment, thus preventing corrosion and facilitating its removal.

[0080] As long as a stable connection between the connector and the steel truss 30 can be guaranteed, this application does not impose specific limitations on this.

[0081] Since the connecting component 20 is located on the installation rib 141 of the bottom formwork 10, there is a gap between the metal connector 210 and the bottom formwork 10. Concrete can more easily enter the bottom of the metal connector 210, making it easier for the concrete to wrap around the lap-type connecting component 20 and preventing the metal connector 210 from being exposed and rusting. At the same time, the fastener 40 is wrapped by the support 220 to prevent the concrete from contacting the fastener 40, thus preventing the fastener 40 from being wrapped by the concrete, reducing the difficulty of disassembling the fastener 40, and improving the disassembly efficiency.

[0082] The following describes how to use the detachable bottom formwork steel truss 30 floor deck provided in the embodiments of this application.

[0083] In this embodiment, the process of using the removable bottom formwork steel truss 30 floor deck slab can be achieved through the following steps, where steps S101 to S102 are not in any particular order:

[0084] Step S101: Weld or snap the lower chord steel bars 33 of each steel truss 30 to the connector assembly to prevent slippage between the steel truss 30 and the connector assembly 20;

[0085] Step S102: The connection between the connecting component 20 and the bottom template 10 is completed by fastener 40. Fastener 40 includes, but is not limited to, screws. The screws pass through the reinforcing ribs 121 on the bottom template 10 and extend upward into the connecting component 20 to connect the connecting component 20 to the bottom template 10.

[0086] Step S103: Assemble each bottom template 10 in sequence. In two adjacent bottom templates 10, the supported rib 11 of the upstream bottom template 10 is supported on the bottom surface of the supported rib 12 of the downstream bottom template 10.

[0087] Step S104: Repeat steps S101 to S103 above to complete the installation of the detachable bottom formwork steel truss 30 floor deck.

[0088] Step S105: After the concrete is poured on the top surface of the bottom formwork 10 and has reached strength, the fasteners 40 are removed, and the disassembly edge 122 of the support rib 12 is clamped with a tool to pull the bottom formwork 10 downward and separate it from the concrete and connecting components 20, thereby removing the bottom formwork 10.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bottom template, characterized in that, include: A plate with two opposing sides; A supporting rib is connected to one side of the plate. The connecting part is connected to the other side of the plate. as well as The supported rib is connected to the side of the connecting part opposite to the plate body; The supported rib of the downstream bottom template overlaps the supporting rib of the upstream bottom template; The supporting rib has a reinforcing structure on the side opposite to the plate that abuts against the supported rib.

2. The bottom template according to claim 1, characterized in that, The supported rib includes a connected convex rib and a concave rib, with the concave rib located at the free end of the supported rib. The supporting rib also includes a supporting concave rib that abuts against the concave rib, the supporting concave rib being connected to the reinforcing structure, and the reinforcing structure abutting against the convex rib.

3. The bottom template according to claim 2, characterized in that, The reinforcing structure includes: A reinforcing rib is folded towards the convex rib, the concave rib is attached to the reinforcing rib at the connection point with the convex rib, and the top of the reinforcing rib abuts against the convex rib.

4. The bottom template according to claim 3, characterized in that, The reinforcing structure also includes: The detachable edge is connected to the reinforcing rib, and the detachable edge is coplanar with the bottom surface of the supporting concave rib.

5. The bottom template according to claim 2, characterized in that, The reinforcing structure includes: Multiple hypotenuses connected in sequence, with an acute angle between any two adjacent hypotenuses; The inclined side connected to the supporting concave rib is the fitting side, and the connection between the convex rib and the concave rib fits and abuts against the fitting side.

6. The bottom template according to claim 5, characterized in that, The inclined surface away from the supporting rib is the disassembly edge, which slopes downward toward the side away from the plate and has an operating distance from the connecting part.

7. The bottom template according to claim 5, characterized in that, The reinforcing structure also includes: A supporting surface that fits against the top surface of the rib; The supporting surface is connected to the inclined side away from the supporting concave rib, and the side of the supporting surface away from the inclined side is aligned with the top boundary of the convex rib.

8. The bottom template according to claim 7, characterized in that, The reinforcing structure also includes: The detached edge is connected to the side of the supporting surface away from the inclined side; The disassembly edge forms an acute angle with the supporting surface, and there is an operating gap between the disassembly edge and the connecting part.

9. The bottom template according to claim 5, characterized in that, The ends of the reinforcing structure are flattened.

10. The bottom template according to claim 2, characterized in that, The connecting portion includes a plurality of the raised ribs and the concave ribs connected in sequence, and the number of the concave ribs is one more than the number of the raised ribs.

11. The bottom template according to claim 9, characterized in that, The plate is provided with a plurality of protruding mounting ribs at intervals, and the connectors are installed on the mounting ribs; The mounting ribs on both sides of the plate are respectively connected to the concave ribs and the supporting concave ribs on the connecting part that are away from the supported ribs.

12. The bottom template according to claim 9, characterized in that, The ends of the reinforcing structure are flattened.

13. A steel truss floor deck, characterized in that, include: Steel truss; The bottom template is as described in any one of claims 1 to 12 above, and multiple bottom templates are sequentially fitted and overlapped; as well as A connecting component, located between the steel truss and the bottom formwork, is used to connect the steel truss to the bottom formwork.

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