Assembly structure of steel bar truss floor deck

Abstract

The present invention relates to an assembly structure for a steel truss floor deck, comprising a base formwork and at least two steel trusses assembled to the base formwork via fasteners. The base formwork is provided with two splicing ends arranged along the length of the steel trusses; at least one of the steel trusses is positioned adjacent to the splicing end, and the fastener portion connecting the steel trusses adjacent to the splicing end extends outside the base formwork. This structure can reduce the splicing seam between the two base formworks and disperse the force exerted by the poured concrete on the splicing ends of the base formwork, thereby reducing the problem of misalignment of the splicing seams at the base formwork splicing ends and ensuring a smooth cast floor.

Description

Technical Field

[0001] The present invention relates to the field of building materials and equipment, and in particular to an assembly structure of a steel bar truss floor deck. Background Art

[0002] Typically, floor slab casting involves assembling removable steel trusses and floor decks, which are manufactured in a factory. The decks, fitted with steel trusses, are then joined together on site, concrete is poured, and the decks are removed and reused after the concrete sets. This allows for factory-based production, reducing the impact of environmental and weather conditions on construction schedules, while also ensuring safe and high-quality truss production. However, existing floor decks leave joints when they are assembled on site. During the concrete pour, the weight of the concrete causes the joints to shift, resulting in an uneven floor surface.

[0003] To address this issue, joint fixing plates are typically installed beneath the joints of the floor decking panels, acting as "patches." These plates are spaced and connected to the decking panels on either side of the joint to minimize misalignment. However, this approach has significant drawbacks. The installation and removal of the fixing plates not only requires significant work and impacts construction schedules, but also requires additional safety precautions, presents potential safety hazards, and significantly increases construction costs. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide an assembly structure of a steel truss floor deck, which can reduce the problem of joint misalignment at the joints of the steel truss floor deck, so that the cast floor is smooth.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A steel truss floor deck assembly structure includes a bottom formwork and at least two steel trusses assembled on the bottom formwork by fasteners, wherein the bottom formwork is provided with two splicing ends arranged along the length direction of the steel trusses; at least one of the steel trusses is arranged near the splicing end, and the fastener portion connecting the steel trusses arranged near the splicing end extends outside the bottom formwork.

[0007] The at least two steel bar trusses include a first steel bar truss and a second steel bar truss, wherein the first steel bar truss is arranged close to a splicing end of the bottom template.

[0008] The second steel bar truss is arranged close to the other spliced end of the bottom formwork.

[0009] The fastener comprises a fastener body, and a portion of the fastener body close to the splicing end is extended outside the bottom template.

[0010] The fastener comprises a fastener body. An extension arm is provided on the fastener body near the splicing end, and the extension arm is extended outside the bottom template.

[0011] The fastener comprises a fastener body, an extension arm is provided on the fastener body, and the extension arm of the fastener close to the splicing end is extended outside the bottom template.

[0012] The lower end surface of the extension arm is flush with the upper end surface of the bottom template.

[0013] The fastener extension arm on the bottom template close to the splicing end is connected to another bottom template adjacent to the bottom template.

[0014] The fastener extension arm near the splicing end on the bottom template is matched with a limiting piece, and the limiting piece is locked on another bottom template adjacent to the bottom template.

[0015] The limiting member includes an upper plate, a lower plate and an intermediate plate. The upper and lower ends of the intermediate plate are respectively connected to the upper plate and the lower plate. The lower end surface of the upper plate is used to press against the upper end surface of the extension arm.

[0016] The lower end surface of the extension arm is flush with the upper end surface of the bottom template, and the distance between the lower end surface of the upper plate and the lower end surface of the lower plate is the same as the height of the extension arm.

[0017] The fastener comprises a fastener body and a gasket, and the gasket portion is extended outside the bottom template.

[0018] The steel truss includes an upper chord, two lower chords, and a web connecting the upper chord and the lower chord, and the fastener is assembled on the lower chord; the spacing between the two spliced ends of the bottom template is A, and the distance between the upper chord and the spliced end of the steel truss arranged near the spliced end is less than A / 4.

[0019] After adopting the above solution, the present invention arranges at least one of the steel trusses near the splicing end, and simultaneously extends the fastener portion connected to the steel truss near the splicing end outside the splicing end of the bottom formwork. When the steel truss floor deck is assembled, the fastener portion on one of the two adjacent bottom formworks overlaps the upper end surface of the adjacent bottom formwork. This reduces the splicing seam between the two bottom formworks and disperses the force of the poured concrete on the splicing end of the bottom formwork, thereby reducing the problem of splicing seam misalignment at the splicing end of the bottom formworks and ensuring a smooth cast floor.

[0020] Furthermore, the present invention provides an extension arm on the fastener near the bottom formwork joint, extending beyond the bottom formwork. This extension arm further reduces the joint seam between the two bottom formworks, dissipates the concrete forces acting on the joint seam, and prevents the steel trusses from being too close to the joint ends, thereby facilitating the fabrication of the steel truss floor deck.

[0021] Furthermore, a stopper is added that cooperates with the extension arm of the fastener of one base formwork and is assembled on the adjacent base formwork. This stopper and the extension arm cooperate to make the splicing ends of the two adjacent base formworks more stable, more effectively avoid the misalignment of the splicing seam, and further ensure the flatness of the cast floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the steel truss floor deck structure of Example 1;

[0023] Figure 2 Schematic diagram of the steel truss floor deck structure of Example 2 Figure 1 ;

[0024] Figure 3 Schematic diagram of the steel truss floor deck structure of Example 2 Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the assembly of the steel truss floor deck of Example 2;

[0026] Figure 5 This is a schematic diagram of the steel truss floor deck structure of Example 3;

[0027] Figure 6 This is a schematic diagram of the assembly of the steel truss floor deck of Example 3;

[0028] Figure 7 This is a schematic diagram of the steel truss floor deck structure of Example 4;

[0029] Figure 8 This is a schematic diagram of the assembly of the steel truss floor deck of the fourth embodiment;

[0030] Figure 9 for Figure 8 A partial enlarged view of

[0031] Figure 10 This is a schematic diagram of the steel truss floor deck structure of Example 5. DETAILED DESCRIPTION

[0032] The present invention discloses an assembly structure of a steel truss floor deck, which includes a bottom formwork 10 and at least two steel trusses 20 assembled on the bottom formwork 10 by fasteners 30. The bottom formwork 10 is provided with two splicing ends arranged in the length direction of the steel trusses (the same as the length direction of the lower chord); at least one of the steel trusses 20 is arranged near the splicing end, and the fastener portion connected to the steel truss 20 arranged near the splicing end and near the splicing end extends outside the splicing end of the bottom formwork 10.

[0033] The steel truss 20 includes an upper chord, two lower chords, and a web connecting the upper chord and the lower chord, and the fastener 30 is assembled on the lower chord; the spacing between the two splicing ends of the bottom formwork 10 is A, and the distance between the upper chord and the splicing end of the steel truss 20 arranged near the splicing end is less than A / 4.

[0034] When the steel truss floor deck is assembled, the splicing ends of the two adjacent bottom formworks 10 are spliced together, and part of the fastener 30 on one bottom formwork 10 will overlap the upper end surface of the adjacent bottom formwork 10. This will reduce the splicing seam between the two adjacent bottom formworks 10 and disperse the force of the poured concrete on the splicing end of the bottom formwork, thereby reducing the problem of splicing seam misalignment at the splicing end of the bottom formwork and making the cast floor flat.

[0035] To fully describe the present invention, two embodiments are listed below for illustration.

[0036] Example 1

[0037] like Figure 1 As shown, in this embodiment, the steel truss floor deck includes a bottom formwork 10 and three steel trusses 20, the three steel trusses 20 are respectively a first steel truss 21, a second steel truss 22 and a third steel truss 23, the first steel truss 21 is arranged at a position close to a splicing end of the bottom formwork 10, and the main body of the fastener 30 connecting the first steel truss 21 and close to the splicing end extends outside the bottom formwork 10.

[0038] Example 2

[0039] like Figures 2 to 4 As shown, unlike the first embodiment, an extension arm 31 is provided on the fastener body connecting the first steel truss 21 and near the splicing end. The extension arm 31 is positioned outside the base form 10. The lower end surface of the extension arm 10 is flush with the upper end surface of the base form 10. The provision of the extension arm 31 on the fastener 30 not only further reduces the splicing seam between two adjacent base formworks 10 and disperses the force exerted by concrete on the splicing seam, but also prevents the steel trusses 20 from being too close to the splicing end, thereby facilitating the processing of the steel truss floor deck.

[0040] As a structural variation of the second embodiment, all fasteners 30 connecting the steel trusses 20 and the bottom formwork 10 are provided with extension arms 31 to facilitate the processing of the steel truss floor deck in the factory.

[0041] Example 3

[0042] like Figure 5 and Figure 6As shown, different from the second embodiment, in this embodiment, the first steel truss 21 and the second steel truss 21 are respectively arranged near the two splicing ends of the bottom template 10, and the fastener 30 connecting the first steel truss 21 and close to the splicing end is provided with an extension arm 31 extending outside the bottom template 10, and the fastener 30 connecting the second steel truss 21 and close to the splicing end is also provided with an extension arm 31 extending outside the bottom template 10.

[0043] When the steel truss floor deck of this structure is assembled, the spliced ends of two adjacent bottom formworks 10 are spliced together. For ease of description, the two adjacent bottom formworks 10 are referred to herein as the first bottom formwork 11 and the second bottom formwork 12. The extension arm 31 of the fastener 30 on the first bottom formwork 11 overlaps the upper end surface of the second bottom formwork 12, and the extension arm 31 of the fastener 30 on the second bottom formwork 12 also overlaps the upper end surface of the first bottom formwork 11. In this way, the extension arm 13 can reduce the splicing seam between the two bottom formworks 10, disperse the force of the poured concrete, and smooth the poured floor. Furthermore, in this embodiment, because the extension arm 31 of the fastener 30 on the first bottom formwork 11 overlaps the second bottom formwork 12, when concrete applies force to the spliced end of the first bottom formwork 11, the second bottom formwork 12 can provide some support for the spliced end of the first bottom formwork 11. Similarly, because the extension arms 31 of the fasteners 30 on the second base form 12 are attached to the first base form 11, when concrete exerts a force on the spliced ends of the second base form 12, the first base form 11 can provide some support for the spliced ends of the second base form 12. The extension arms 31 make the spliced ends of two adjacent base form 10 more stable, effectively preventing misalignment of the splicing seam and further ensuring the flatness of the cast floor.

[0044] Example 4

[0045] This fourth embodiment is a further improvement based on the second and third embodiments, so that the fastener extension arm near the splicing end of the first bottom template is connected to the second bottom template. Specifically, a lock hole can be formed on the fastener extension arm, and the fastener extension arm can be locked and connected to the second bottom template through the lock hole.

[0046] You can also Figures 7 to 9 As shown, a stopper 40 is added, which cooperates with the extension arm 31 of the fastener 30 of one base plate (the first base plate 11) and is assembled on the adjacent base plate (the second base plate 12). This stopper 40 comprises an upper plate 41, a lower plate 42, and an intermediate plate 43. The upper and lower ends of the intermediate plate 42 connect the upper and lower plates 41 and 43, respectively. The lower end surface of the upper plate 41 is used to press against the upper end surface of the extension arm 31, and the lower end surface of the lower plate 42 is used to press against the base plate 10. When the lower end surface of the extension arm 31 is flush with the upper end surface of the base plate 10, the distance between the lower end surface of the upper plate 41 and the lower end surface of the lower plate 42 is the same as the height of the extension arm 31.

[0047] When the steel truss floor deck is assembled, the lower end of the upper plate 41 of the stopper 40 presses against the upper end of the extension arm 31 of the fastener 30, while the lower plate 41 abuts against the upper end of the bottom formwork 10 and is secured with bolts. This stopper 40 secures the spliced ends of two adjacent bottom formworks 10, effectively preventing misalignment of the splicing seam and further ensuring the flatness of the resulting floor.

[0048] Example 5

[0049] like Figure 10 As shown, unlike the previous embodiment, the fastener 30 in this embodiment is composed of a fastener body and a gasket 32. The gasket 32 is provided at the lower end of the fastener body, and a portion of the gasket 32 extends outside the base form 10. The gasket 32 can also reduce the joint between two adjacent base form 10 and disperse the force exerted by the concrete on the joint.

[0050] In summary, the key to the present invention is that the present invention sets at least one of the steel trusses 20 at a position close to the splicing end of the bottom formwork 10, and at the same time extends the fastener 30 connected to the steel truss 20 close to the splicing end outside the splicing end of the bottom formwork 10. When the steel truss floor deck is assembled, the fastener 30 on one of the two adjacent bottom formworks 10 will overlap the upper end surface of the adjacent bottom formwork, which will reduce the splicing seam between the two bottom formworks 10 and disperse the force of the poured concrete on the splicing end of the bottom formwork 10, thereby reducing the problem of splicing seam misalignment at the splicing end of the bottom formwork 13 and making the cast floor smooth.

[0051] In addition, the present invention provides an extension arm 31 on the fastener near the splicing end of the bottom formwork 10, and the extension arm 31 extends outside the bottom formwork 10. The extension arm 10 further reduces the splicing seam between the two bottom formworks 10, disperses the force exerted by the concrete on the splicing seam, and prevents the steel truss from being too close to the splicing end, thereby facilitating the processing of the steel truss floor deck.

[0052] Furthermore, a stopper 40 is added, which cooperates with the extension arm 31 of the fastener of one base form 10 and is assembled on the adjacent base form 10. The stopper 40 cooperates with the extension arm 31 to make the spliced ends of the two adjacent base forms more stable, more effectively avoid the misalignment of the splicing seam, and further ensure the flatness of the cast floor.

[0053] The above description is merely an embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An assembly structure of a steel truss floor deck, characterized by: The invention comprises a bottom formwork and at least two steel bar trusses assembled on the bottom formwork by fasteners, wherein the bottom formwork is provided with two splicing ends arranged along the length direction of the steel bar trusses; at least one of the steel bar trusses is arranged near the splicing end, and the fastener portion connecting the steel bar trusses arranged near the splicing end extends outside the bottom formwork; The fastener includes a fastener body, at least a portion of the fastener body near the splicing end is provided with an extension arm, the extension arm of the fastener near the splicing end being extended outside the bottom template; the fastener extension arm near the splicing end on the bottom template is connected to another bottom template adjacent to the bottom template; The fastener extension arm near the splicing end of the bottom template is equipped with a limiter, and the limiter is locked on another bottom template adjacent to the bottom template; The limiting member includes an upper plate, a lower plate and an intermediate plate, the upper and lower ends of the intermediate plate are respectively connected to the upper plate and the lower plate, the lower end surface of the upper plate is used to press against the upper end surface of the extension arm; the lower end surface of the extension arm is flush with the upper end surface of the bottom template, and the distance between the lower end surface of the upper plate and the lower end surface of the lower plate is the same as the height of the extension arm.

2. The assembly structure of a steel bar truss floor deck according to claim 1, characterized in that: The at least two steel bar trusses include a first steel bar truss and a second steel bar truss, wherein the first steel bar truss is arranged close to a splicing end of the bottom template.

3. The assembly structure of a steel truss floor deck according to claim 2, characterized in that: The second steel bar truss is arranged close to the other spliced end of the bottom formwork.

4. The assembly structure of a steel truss floor deck according to any one of claims 1 to 3, characterized in that: The fastener comprises a fastener body and a gasket. The gasket is arranged at the lower end of the fastener body and partially extends outside the bottom template.

5. The assembly structure of a steel bar truss floor deck according to claim 1, characterized in that: The steel truss includes an upper chord, two lower chords, and a web connecting the upper chord and the lower chord, and the fastener is assembled on the lower chord; the spacing between the two spliced ends of the bottom template is A, and the distance between the upper chord and the spliced end of the steel truss arranged near the spliced end is less than A / 4.

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