A steel truss floor deck

Abstract

The present invention relates to the technical field of building materials, and in particular to a steel truss floor deck, comprising a bottom template, a steel truss and a support member are provided on one side of the bottom template, the steel truss is detachably connected to the bottom template, and the support member extends out of the edge of the bottom template to form a support portion. When the steel truss floor deck is spliced, the steel truss or the bottom template of the steel truss floor deck supports the support portion of the adjacent steel truss floor deck. The steel truss floor deck (referred to as the floor deck) is assembled with the support member while connecting the steel truss, which is simpler and more convenient to assemble, and when multiple floor decks are spliced, the adjacent floor decks can support each other to form a template structure with strong integrity. The support portion arranged above the bottom template can be against the steel structure beam or beam template, and the force borne by the floor deck can be transmitted to the steel structure beam or beam template through the support member, effectively reducing the misalignment and leakage of the edge, and making the floor slab smoother.

Description

Technical Field

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

[0002] Existing steel truss floor decking is generally a detachable assembly of steel trusses and floor decking produced in a factory, which is spliced ​​at the construction site and poured with concrete. This can greatly reduce the time for tying the trusses, improve efficiency, and shorten the construction period, and the truss production is safe and of guaranteed quality. However, existing steel truss floor decking has splicing seams when it is spliced. If the splicing seams are too large, there will be a problem of slurry leakage, which not only wastes concrete but also causes unevenness on the bottom or top of the concrete floor after pouring, requiring secondary processing. In response to the above problems, Chinese patent announcement No. CN207919849U discloses an assembled steel truss floor decking, which supports adjacent floor decking by providing a support member protruding from the boundary of the floor decking on the side of the floor decking opposite to the steel truss to reduce the misaligned gaps generated when adjacent floor decking are spliced, thereby solving the problem of uneven floor slabs after pouring concrete. Although the provision of the support members can reduce the problem of misaligned splicing, a separate assembly is required, which results in problems such as inconvenient assembly of the existing steel truss floor decking, large space occupied in transportation, and difficulty in collecting the support members during disassembly. At the same time, when the floor decking is assembled at the boundary of the opening, it is inconvenient for the support members to extend out of the floor decking when the width direction of the steel truss floor decking is close to the opening or the beam structure, and even if they are extended, they cannot be supported, resulting in relatively weak boundary support of the floor decking. Summary of the invention

[0003] In view of the many problems existing in the existing assembled steel truss floor decking, the present invention provides a steel truss floor decking, which can be more convenient in assembly, transportation and disassembly, so that the floor decking can support each other as a whole, the cast-in-place floor decking is smoother, and the problems of misaligned joints and leakage of mortar can be effectively solved.

[0004] A steel bar truss floor decking slab according to the present invention comprises a bottom formwork, a steel bar truss and a support member are provided on one side of the bottom formwork, the steel bar truss is detachably connected to the bottom formwork, the support member extends out of the boundary of the bottom formwork to form a support portion, and when the steel bar truss floor decking is spliced, the steel bar truss or the bottom formwork of the steel bar truss floor decking supports the support portion of the adjacent steel bar truss floor decking.

[0005] The steel truss and the support are connected on one side of the steel truss floor deck at the same time, so that the steel truss floor deck (referred to as the floor deck) is assembled with the support while connecting the steel truss, which makes the assembly simpler and more convenient. When multiple floor decks are spliced, the adjacent floor decks can support each other to form a template structure with strong integrity. The support part set above the bottom template can be against the steel structure beam or beam template. The force carried by the floor deck can be transmitted to the steel structure beam or beam template through the support, effectively reducing the staggered seams and leakage of slurry at the boundary, and making the floor slab smoother.

[0006] Preferably, the support part contacts the upper side of the bottom template, and a gap is provided between the front end of the support part and the adjacent floor decking. The support part contacts the bottom template, which can reduce the local or overall downward disturbance of the floor decking, while ensuring that the adjacent floor decking produces the same deformation, reducing or even eliminating the splicing misalignment, and leaving a gap between the front end of the support part and the bottom template supporting it, which can reduce the alignment time of the construction workers in splicing the floor decking, facilitate quick splicing, and greatly improve the work efficiency of assembling the floor decking.

[0007] Preferably, the support members are evenly spaced along the length direction of the steel truss, and the support members extend out of the two boundaries of the bottom formwork respectively. The support members distributed along the length direction of the steel truss can evenly support the adjacent floor decks, and the steel truss floor decks are evenly and stably stressed. When construction workers step on the floor decks or when construction equipment is placed or cast-in-place concrete is partially vibrated, even when the floor decks are locally stressed, there will be no local collapse, misalignment or damage. The local stress can be evenly spread to the adjacent steel truss floor decks, so as to be transmitted to the beams at the transverse upper boundary of the floor decks.

[0008] Preferably, the support members extend out of two boundaries of the bottom template in a staggered manner, and the corresponding support parts respectively abut against two adjacent steel truss floor decks during splicing. The support members extend out in a staggered manner, so that any floor decks of the same model can be spliced ​​and the force is uniform, and it is also convenient to assemble the support members and reduce the use of support member materials. Therefore, the support members do not need to extend out of both boundaries at the same time, but only one boundary, and the material used for the support members can be greatly reduced.

[0009] Preferably, the support parts adjacent to the same boundary of the bottom template are spaced 750-850mm apart. Combined with the standard steel truss and the property of the bottom template that can be recycled for multiple times, taking into account that the span of the general floor deck is 1600-4000mm, and it is easy to deform the floor deck end by about 400mm, under the conditions of reducing costs and simplifying the process, the support part spacing of 750-850mm can reduce the amount of support parts while meeting the support effect, and can be adapted to different steel trusses to avoid interference with the web reinforcement.

[0010] Preferably, the support member is fixedly connected to the steel truss, which can withstand a large force from the support member, making the floor deck support structure relatively stable and convenient to fix, greatly reducing the loss of the bottom template.

[0011] Preferably, the support member is connected to multiple steel trusses. The support member is connected to multiple steel trusses, and the supporting effect of the adjacent floor decking on the supporting part can be transmitted to the multiple steel trusses, further reducing local deformation and overall deformation of the floor decking.

[0012] Preferably, the steel bar truss comprises two lower chord steel bars, one upper chord steel bar and a web bar connecting the upper chord steel bars and the lower chord steel bars, and the support member is provided with a groove adapted to the lower chord steel bars, and the groove is connected to the lower chord steel bars. By connecting the lower chord steel bars with the groove, the amount of support member material is reduced, and at the same time, the support member is effectively fixed under the action of the two lower chord steel bars, and the support function of the support member can be achieved even without the need for fastener connection, and the two lower chord steel bars can be pre-deformed and buckled in the groove to achieve relative fixation of the support member.

[0013] Preferably, it includes connectors distributed along the length direction of the steel truss, the connectors are connected to the lower chord steel bars, one end of the fastener passes through the bottom template and is detachably connected to the connector, the support member and the connector are an integral part, and the connector extends out of the bottom template boundary to form a support portion. The steel truss and the bottom template are detachably connected through the connector and the fastener, which is a commonly used connection method for existing detachable steel truss floor decks, and the assembly is also relatively simple. Therefore, the connector and the support member are an integral part, that is, one end of the connector extends out of the bottom template to form a support portion, and the structural function of the support member being supported by the adjacent bottom template is utilized. The support member utilizes the connection method of the connector with the steel truss and the bottom template, which not only greatly simplifies the assembly method of the support member, uses the assembly equipment of the original connector, and can flexibly set the position of the support member according to the number of times the bottom template is used and the damage condition. The combination of the support member and the connector complements each other and exceeds the sum of their respective effects.

[0014] Preferably, a bottom template is connected to more than three steel trusses, the support is connected to the steel trusses near the bottom template boundary, and the groove is connected to two lower chord steel bars. The bottom template is connected to three or more steel trusses, and the support is only arranged on the steel trusses at the edge of the bottom template. This arrangement can reduce the change of the connecting parts, make the support less material, and is more convenient to process and assemble.

[0015] Preferably, the support member is detachably connected to the bottom template, and one end of the fastener passes through the bottom template and is connected to the support member. The support member is quickly and conveniently connected to the bottom template, and after the connection, it can be assembled with the steel truss, which can save assembly time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a top view structure of a steel truss floor deck;

[0017] Figure 2 It is a top view structural diagram of three steel truss floor decks spliced ​​together;

[0018] Figure 3 for Figure 1 Middle AA section view;

[0019] Figure 4 The figure is a schematic diagram of a floor deck assembly structure;

[0020] Figure 5 It is a schematic diagram of a side view structure of a support member with a groove opening downward;

[0021] Figure 6 It is a schematic diagram of the side view structure of another type of support member with the groove opening downward;

[0022] Figure 7 This is a schematic diagram of the structure of the support member groove opening viewed from the side of the upper floor deck;

[0023] Figure 8 A top view of a floor decking plate with integrated support members and connectors;

[0024] Fig. 9 This is a structural diagram of a support member and a connecting member as one;

[0025] Fig.10 It is a schematic diagram of the top view of the structure of the floor deck connected with the support and the multi-reinforcement truss;

[0026] Fig.11 for Fig.10 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0027] Fig.12 A schematic diagram of a connecting multi-steel truss support;

[0028] Fig.13 Schematic diagram of the floor decking connected to the support line and bottom formwork.

[0029] In the figure:

[0030] 1. Bottom formwork, 2. Steel bar truss, 21. Lower chord steel bar, 22. Upper chord steel bar, 3. Support member, 31. Support part, 32. Interference part, 33. Groove, 35. Protrusion, 4. Fastener, 5. Connector. DETAILED DESCRIPTION

[0031] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0032] Example 1

[0033] like Figure 1-3 As shown, a steel bar truss floor deck includes a bottom template 1, a steel bar truss 2 and a connector 5. The bottom template 1 can be a bamboo board, a wooden template, a composite board, etc., or even some metal templates and plastic templates that meet the support conditions. The steel bar truss 2 includes a single steel bar truss with an upper chord steel bar and a lower chord steel bar connected by a web bar, a steel bar truss with two lower chord steel bars and an upper chord steel bar connected by the web bar steel bar distributed in a triangular shape, and of course, a steel bar truss with a rectangular cross-section distribution. The connector 5 cooperates with the fastener 4 to assemble and fix the bottom template 1 and the steel bar truss 2. The connector 5 is connected to the steel bar truss 2, and there are many ways to connect it, as long as the connector 5 and the steel bar truss 2 can be relatively fixed. Existing support members such as the connection structure of the steel bar truss and the bottom template disclosed in the Chinese patent publication / announcement numbers CN204040268U, CN209538526U, CN209556196U and CN110173067A can be applied to this floor deck.

[0034] The bottom template 1 is fixed on the steel truss 2 by detachably connecting the fastener 4 with the connector 5 through one end of the fastener 4. After the concrete is poured and cured, the bottom template 1 is easy to disassemble, so that the bottom template 1 can be reused. The detachable connection method of the fastener 4 and the connector 5 includes the commonly used bolt and threaded hole matching fastening connection, the self-tapping screw fastening connection, and of course, the purpose of the bottom template 1 can also be achieved by the detachable connection of the fastener and the connector such as the interference fit connection, the snap connection, etc. The fastener 4 described in the article is not only limited to standard parts such as bolts and screws, but also includes the existing non-standard structures that can achieve detachable connection. A specific implementation method, each bottom template 1 is 600mm wide and the length is made according to the actual situation, generally 1000mm~4000mm. Of course, if the length is greater than 4000mm, it can also be supported by the support part. Three steel trusses 2 distributed in a triangular shape are distributed on one side of the bottom template 1, and a number of connectors 5 arranged at intervals are evenly distributed in the length direction of the steel truss 2. As Figure 3 As shown, each of the steel trusses 2 includes two lower chord steel bars 21 and one upper chord steel bar 22. The upper chord steel bars 21 and the lower chord steel bars 22 are connected by a web bar 23. The connector 5 is provided with a slot that matches the two lower chord steel bars 21. The lower chord steel bars 21 are fixed in the slot. The steel trusses 2 are then detachably fixed to the bottom template 1 by the connector 5 and the fastener 4.

[0035] like Figure 3As shown, a support member 3 is fixed to one side of the bottom template 1 on the same side as the steel truss 2 on the bottom template 1. The support member 3 extends out of the boundary of the bottom template 1 to form a support portion 31. When the steel truss floor deck is assembled, the support portion 31 conflicts with the adjacent steel truss floor deck. In this embodiment, the support portion 31 conflicts with the upper side of the bottom template 2, that is, the front side of the bottom template 1 is provided with one side of the steel truss. Of course, the support portion 31 conflicts with one or more of the bottom template 1, the steel truss 2 or the connector 5, and the purpose of mutual support between adjacent floor decks can also be achieved. Through the conflict between the support portion 31 and the adjacent floor decks, the adjacent floor decks support each other, so that the relative height and deformation of the bottom template at the joint between the adjacent floor decks are comparable, which can effectively solve the problems of splicing misalignment and large local deformation. When three or more floor decks are spliced, the middle floor deck is supported by the floor decks on both sides, which can not only reduce the deformation of the local floor decks, but also keep the overall deformation of the floor deck assembly small, so that the reinforced concrete floor slab formed after pouring is flat. The existing floor deck support cannot achieve effective support of the boundary floor deck, and the present embodiment sets the support part 31 on the upper side of the bottom template 1, so that the floor deck near the opening, frame beam and other boundaries can also be overlapped on the steel structure beam or the concrete structure template through the extended support part to achieve the support of the boundary floor deck, so that the support of the entire floor deck is effectively transmitted, which can ensure the flatness of the cast-in-place concrete floor slab without leakage.

[0036] like Figure 1-2 As shown, in this embodiment, the support members 3 are spaced apart along the length direction of the steel truss 2, and the corresponding support members 3 extend out of the two boundaries of the bottom formwork 1, respectively, including one support member extending out of both boundaries at the same time, one support member extending out of only one boundary, and the other support member extending out of the other boundary. A preferred embodiment is to have 1 to 2 connecting members 5 between the adjacent support members 3 in the length direction of the steel truss 2. The support portions 31 extending out of the two opposite boundaries of the bottom formwork 1 are not on the cross section of the same bottom formwork 1, that is, the support members 3 are staggered, or the support portions 31 formed by the same support member 3 extending out of the two boundaries of the bottom formwork 1 are staggered, and then during splicing, the support portions 31 extending out of the boundaries of adjacent floor decking slabs are staggered, so that floor decking slabs of the same length can be spliced ​​at will, and the support portions 31 will not interfere with each other, making splicing convenient. In a preferred embodiment, the adjacent support portions 31 extending out of the boundary on one side of the bottom formwork 1 are spaced 800mm apart. Of course, a spacing of 750-850mm can also achieve distributed support of the support members. As shown in FIG. Figure 4 As shown, the support portion 31 extends out of the bottom template and abuts against the adjacent floor deck. Figure 4 , 5As shown in FIG. 6 , at the end of the support portion 31, that is, the end extending toward the adjacent floor deck, a rounded corner, a chamfer, a bevel or a portion is cut off to form an assembly gap, so that there is a gap between the end of the support portion 31 and the adjacent steel truss floor deck when splicing. Figure 4 As shown, the front end of the support part is provided with a rounded corner near the bottom, and the distance between the end of the support part and the upper surface of the floor deck is H. The setting of the distance H facilitates the assembly of the floor deck. When the floor deck is spliced, the adjacent bottom template 1 enters from the assembly notch at the end of the support part, and the gap between the bottom template 1 and the support part 31 gradually decreases until they abut against each other.

[0037] In some embodiments, Figure 3-6 As shown, the opening of the groove 33 faces one side of the bottom template 1, and the opening of the groove 33 is an open space for the lower chord steel bar to be placed in the groove 33. Protrusions 35 are formed on both sides of the groove 33, and the protrusions 35 can be in conflict with the bottom template 1 or have a spacing. The support member 3 can be provided with a protrusion that contacts the bottom template, and also a protrusion that has a spacing from the bottom template. When one end of the fastener 4 passes through the bottom template 1 and is connected to the protrusion 35, the protrusion 35 connected to the fastener is in conflict with the bottom template, free from the influence of concrete, and is convenient for removing the fastener after pouring concrete. Of course, by providing a gasket between the protrusion 35 and the bottom template 1, it should also be regarded as the protrusion 35 being in conflict with the bottom template 1. The support member can be connected to one or more fasteners, such as Figure 3 , 4 A support member is connected to a fastener, Figure 5 , 6 The support member is connected with two fasteners. Of course, the support member 3 can also achieve the mutual support function by only fixing the pre-tightening force of the steel bar truss with the groove 33 or fixing the steel bar truss with the bottom template. The groove 33 is provided with an arc-shaped concave structure to match the lower chord steel bar 21, and the steel bar truss is fixed by the pre-tightening deformation of the lower chord steel bar.

[0038] In other embodiments, Figure 7 As shown, the opening direction of the groove 33 is opposite to the direction of the groove relative to the bottom template in Example 1. A groove 33 is provided on one side of the support member 3, and a conflicting portion 32 is provided on the other side of the opposite support member 3. When the support member 3 is installed, the opening direction of the groove 33 is away from the bottom template 1, and the conflicting portion 32 is in conflict with the bottom template 1. In this way, the support portion 31 is closely attached to the bottom template 1 and conflicts with the adjacent bottom template, which reduces the deformation and damage of the bottom template 1 during transportation, and can also avoid the problem that when pouring concrete, the conflicting portion 31 and the bottom template 1 cannot be grouted, and even if the concrete can be filled, it will fall off.

[0039] The support member 3 can also be connected to two or three steel bar trusses, one end or both ends of which extend out of the bottom template boundary to form a support portion 31. When the floor deck is assembled, the support portion 31 is supported on the adjacent floor deck. Figure 3-4 As shown, the support is connected to a steel truss, such as Figure 10-12 A support member is shown connected to two steel trusses.

[0040] When the steel truss floor deck is spliced, one floor deck is assembled and fixed, and the other floor deck is aligned and horizontally moved from one edge of the fixed floor deck to assemble. After the assembly is completed, the supporting parts contact each other on the adjacent floor decks to form mutual support.

[0041] Example 2

[0042] like Figure 8 As shown, the difference between this example and Example 1 is that the support member 3 and the connecting member 5 are an integral part. The connecting member 5 is connected to the lower chord steel bar 21, and one end of the fastener 4 passes through the bottom template 2 and is detachably connected to the connecting member 5. The support member 3 and the connecting member 4 are an integral part, and the connecting member 4 extends out of the boundary of the bottom template to form a support portion 31. When the support member 3 and the connecting member 5 are integral, only the connecting member 5 close to the boundary of the bottom template 2 needs to extend out of the boundary of the bottom template 2 to form the support portion 31. At this time, the support member 3 is fixedly connected to the steel truss 2 and the bottom template 1, and the supporting force exerted on the support frame 3 can be effectively transmitted to the steel truss and the bottom template. When the connecting member 5 with the support portion 31 is arranged, as Fig. 9 As shown, the support portion is provided with a notch on the same side, so no matter how the connecting piece is arranged, the support portion 31 will not be interfered with by the support portion of the adjacent floor decking. In this embodiment, a bottom template 1 is connected to three steel trusses 2, and the steel trusses 2 are parallel to each other and evenly distributed on one side of the bottom template 1. The connecting piece 5 connected to the steel trusses 2 near the boundary of the bottom template 1 is provided with a support portion 31 extending out of the boundary of the bottom template 1. A connecting piece is connected to two lower chord steel bars on the steel truss, and the lower chord steel bars are fixed in the groove of the connecting piece. Of course, the groove can be two grooves or one groove. The connecting piece portion at the boundary of the bottom template is provided with a support portion, so that the support piece consumables can be used, which can reduce the material cost. At the same time, its assembly is also relatively convenient, and it can be used with slight changes to the existing assembly equipment and the manufacturing mold of the connecting piece.

[0043] Example 3

[0044] like Fig.13As shown, the difference between this embodiment and embodiment 1 and embodiment 2 is that the support member is only detachably fixedly connected to the bottom template, specifically, one end of the fastener passes through the bottom template and is connected to the support member. The fastener 4 is a bolt. Of course, the support member 3 is fixed by self-tapping bolts or self-tapping screws during installation, which is the same as this specific embodiment. Under the inspiration of ordinary technicians in this field, fixing the support member 3 by easily detachable fixing members such as horse nails and gun nails also belongs to a kind of fastener fixing the support member referred to in the present invention.

[0045] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A steel truss floor deck, comprising a bottom formwork (1), characterized in that: A steel truss (2) and a support member (3) are provided on one side plate surface of the bottom template (1); the steel truss (2), the support member (3) and the bottom template (1) are detachably connected; the support member (3) extends out of the boundary of the bottom template (1); the extended portion forms a support portion (31); when the steel truss floor deck is spliced, the support portion (31) of the steel truss floor deck is supported on the steel truss or the bottom template of the adjacent steel truss floor deck.

2. The steel bar truss floor deck according to claim 1, characterized in that: The support portion (31) is located above the adjacent bottom template (1), and a gap is provided between the front end of the support portion (31) and the adjacent bottom template (1).

3. The steel bar truss floor deck according to claim 1, characterized in that: The support members (3) are distributed at intervals along the length direction of the steel bar truss (2), and extend out of two boundaries of the bottom template respectively.

4. The steel bar truss floor deck according to claim 3, characterized in that: The support members (3) extend out of two boundaries of the bottom template (1) in a staggered manner, and when spliced, the corresponding support parts (31) respectively abut against the adjacent steel truss floor decks on both sides.

5. The steel bar truss floor deck according to claim 4, characterized in that: The support portions (31) adjacent to each other at the same boundary of the bottom template (1) are spaced 750 to 850 mm apart.

6. The steel bar truss floor deck according to any one of claims 1 to 5, characterized in that: The support member (3) is fixedly connected to the steel bar truss (2).

7. The steel bar truss floor deck according to claim 6, characterized in that: The support member (3) is fixedly connected to a plurality of steel bar trusses (2) on the bottom template (1).

8. The steel bar truss floor deck according to claim 6, characterized in that: The steel bar truss (2) comprises two lower chord steel bars (21), an upper chord steel bar (22), and a web bar steel bar (23) connecting the upper chord steel bars (22) and the lower chord steel bars (21); the support member (3) is provided with a groove (33) adapted to the lower chord steel bars (21); the groove (33) is connected to the lower chord steel bars (21).

9. The steel bar truss floor deck according to claim 8, characterized in that: It comprises connecting pieces (5) distributed along the length direction of the steel bar truss, the connecting pieces (5) being connected to the lower chord steel bars, one end of the fastener passing through the bottom template and being detachably connected to the connecting piece, the supporting piece (3) and the connecting piece (5) being an integral piece, and the connecting piece (5) extending out of the boundary of the bottom template (1) to form a supporting portion (31).

10. The steel bar truss floor deck according to claim 9, characterized in that: Each bottom template (1) is connected to more than three steel bar trusses (2), the support member (3) is connected to the steel bar trusses (2) close to the boundary of the bottom template (1), and the groove (33) is connected to two lower chord steel bars (21).

11. The steel bar truss floor deck according to any one of claims 1 to 5, characterized in that: The support member (3) is detachably connected to the bottom template (1), and one end of the fastener passes through the bottom template (1) and is connected to the support member (3).

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