Reinforcement truss-fitted deck plate and method for reinforcing reinforcement truss-fitted deck plate

Abstract

To construct a slab without installing timbering even when a deck plate in production does not have a strength satisfying the required one.SOLUTION: A reinforcement truss-fitted deck plate 10 comprises: plural reinforcement trusses 2 supported onto an installation face; a substrate 1 arranged below the plural reinforcement trusses 2; and plural hanging materials 3 connecting the plural reinforcement trusses 2 each other, and each reinforcement truss includes a top reinforcement 21, a bottom reinforcement 22 and a lattice reinforcement 23. The reinforcement truss-fitted deck plate 10 comprises transmission reinforcements 6 and reinforcement trusses 7. The transmission reinforcements 6 extend linearly along a width direction, are connected to the top reinforcements 21 of the plural reinforcement trusses 2, and are arranged at intervals in a lengthwise direction. The reinforcement trusses 7 are supported onto the installment face between the adjacent reinforcement trusses 2. The plural transmission reinforcements 6 and reinforcement trusses 7 are connected.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a deck plate with a rebar truss and a method for reinforcing a deck plate with a rebar truss. [Background technology]

[0002] Patent Document 1 describes a conventional deck plate with a reinforcing bar truss. The deck plate with a reinforcing bar truss described in Patent Document 1 includes a reinforcing bar truss having upper end reinforcement, lower end reinforcement, and lattice reinforcement, and a metal base (base plate). A slab (e.g., a ceiling slab) can be constructed by pouring concrete onto the deck plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-013691 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if a conventional deck plate with reinforcing bar trusses is transported to a construction site and laid on the installation surface, and it is discovered that the required strength (allowable slab thickness, allowable span length) of the deck plate with reinforcing bar trusses is not met, it is necessary to install shoring before pouring concrete.

[0005] However, depending on the floor height, installing shoring can be difficult, and if the floor height is too high, installing shoring may not be possible.

[0006] This invention has been made in response to the above-mentioned problems, and aims to provide a deck plate with reinforcing bar trusses and a method for reinforcing a deck plate with reinforcing bar trusses that allows a slab to be constructed without installing shoring, even if the deck plate at the time of manufacture does not meet the required strength. [Means for solving the problem]

[0007] The present invention provides a deck plate with reinforcing bar trusses, comprising: a plurality of reinforcing bar trusses, each of which has both longitudinal ends supported on an installation surface and spaced apart in the width direction; a base plate disposed below the reinforcing bar trusses; and a plurality of suspension members extending in the width direction in a plan view, connecting the reinforcing bar trusses together and connected to the base plate between adjacent reinforcing bar trusses, and spaced apart in the length direction. Each of the reinforcing bar trusses has upper and lower end reinforcements extending in the length direction, and lattice reinforcement connecting the upper and lower end reinforcements. The deck plate with reinforcing bar trusses also comprises a plurality of transmission reinforcements and a reinforcing truss. The transmission reinforcements extend linearly in the width direction, are connected to the upper end reinforcements of the reinforcing bar trusses, and are spaced apart in the length direction. The reinforcing truss has both longitudinal ends supported on the installation surface between adjacent reinforcing bar trusses. In addition, a plurality of the transmission reinforcements are connected to the reinforcing truss. The steel truss deck plate of this invention integrates the steel truss and the reinforcing truss into a single structure, so even if the deck plate does not meet the required strength at the time of manufacture, it can be reinforced on-site to improve the strength of the deck plate. As a result, the slab can be constructed without installing shoring.

[0008] The transmission bars are preferably connected to the upper end bars below the upper end bars of the plurality of reinforcing bar trusses. According to the deck plate with reinforcing bar trusses of this invention, the upper end reinforcement of the reinforcing bar trusses can effectively withstand the upward load transmitted from the reinforcing trusses.

[0009] The reinforcing truss preferably has upper end bars extending in the longitudinal direction and connected to a plurality of the transmission bars, lower end bars spaced below the upper end bars and extending in the longitudinal direction, and lattice bars connecting the upper end bars and the lower end bars. In this embodiment, a steel truss can be used as the reinforcing truss, which makes inventory management easier.

[0010] The multiple hanging members preferably have a peak portion connected to the steel bar truss and a connection portion connected to the peak portion and to the base plate, and the lower end bars of the reinforcing truss rest on the connection portion. In this embodiment, when the reinforcing truss is fixed to the installation surface using the end members, the work can be performed while it is placed on the connection part, making the work easier and improving the workability.

[0011] Of the connection points of the upper end reinforcement of the reinforcing truss to the multiple transmission reinforcements, the connection strength at the center in the longitudinal direction is preferably stronger than the connection strength at the end in the longitudinal direction. Of the connection points of the upper end reinforcement of the reinforcing truss to the multiple transmission reinforcements, the connection point in the center of the length is preferably fixed by welding or a reinforcing bar clip, and the connection points closer to the end than the center of the length are fastened by a tie wire. In this embodiment, a stronger bearing capacity can be obtained at the locations where loads are likely to be applied, thereby ensuring appropriate strength of the slab.

[0012] The nominal diameter of the transmission bar is preferably D10 or more. In this embodiment, it is possible to prevent the strength of the transmission muscle from becoming insufficient.

[0013] The method for reinforcing a deck plate with reinforcing bar trusses according to the present invention comprises a plurality of reinforcing bar trusses, both ends of which in the longitudinal direction are supported on an installation surface and which are spaced apart in the width direction, a base plate arranged below the plurality of reinforcing bar trusses, and a plurality of hanger members extending in the width direction in a plan view, connecting the plurality of reinforcing bar trusses together and connected to the base plate between adjacent reinforcing bar trusses, and spaced apart in the length direction, each of the reinforcing bar trusses having an upper end reinforcement, a lower end reinforcement arranged below the upper end reinforcement, and and lattice reinforcement connecting the upper end reinforcement and the lower end reinforcement, the method comprising the steps of: arranging a plurality of transmission reinforcements extending linearly along the width direction at intervals in the length direction and connecting the upper end reinforcements of a plurality of the reinforcing trusses below the upper end reinforcements; arranging a reinforcing truss between adjacent reinforcing trusses below the plurality of transmission reinforcements, and supporting both longitudinal ends of the reinforcing truss on an installation surface; and connecting the reinforcing truss to the plurality of transmission reinforcements. The method for reinforcing a deck plate with reinforcing trusses according to the present invention allows the reinforcing trusses and reinforcing trusses to be integrated into a single structure, so even if the deck plate does not meet the required strength at the time of manufacture, it can be reinforced on-site to improve the strength of the deck plate. As a result, a slab can be constructed without installing shoring. [Effects of the Invention]

[0014] The above-described deck plate with reinforcing bar trusses and method for reinforcing a deck plate with reinforcing bar trusses according to the present invention have the advantage that a slab can be constructed without installing shoring, even if the deck plate at the time of manufacture does not meet the required strength. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic plan view of a state in which a deck plate with reinforcing bar trusses according to an embodiment has been laid. [Figure 2]2(A) is a schematic cross-sectional view taken along the line AA in FIG. 1. (B) is a schematic cross-sectional view taken along the line AA in FIG. [Figure 3] FIG. 3 is a schematic plan view showing the positional relationship between the reinforcing bar trusses, reinforcing trusses, and transmission bars in a deck plate with reinforcing bar trusses according to an embodiment. [Figure 4] FIG. 4 is a schematic cross-sectional view illustrating a reinforcing truss. [Figure 5] 5(A), (B), and (C) are schematic diagrams illustrating a method for reinforcing an existing deck plate with rebar trusses. DETAILED DESCRIPTION OF THE INVENTION

[0016] <Embodiment> Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0017] Figure 1 is a schematic plan view of a building floor constructed using a rebar trussed deck plate 10 (hereinafter sometimes simply referred to as "deck plate 10") according to this embodiment. As shown in Figure 1, each deck plate 10 has a shape that extends in one direction, and multiple deck plates 10 are lined up in a direction perpendicular to the one direction when viewed from above.

[0018] In this specification, the direction in which the deck plate 10 extends is defined as the "length direction," and the direction in which the deck plates 10 are lined up is defined as the "width direction." The direction perpendicular to the length direction and width direction is sometimes referred to as the "thickness direction." Viewing an object along the thickness direction is sometimes referred to as a "planar view."

[0019] In this specification, "parallel" refers not only to cases where two lines, sides, surfaces, etc. do not intersect even when extended, but also to cases where the angle between the two lines, sides, surfaces, etc. is within a range of 10°. Furthermore, "orthogonal" refers to cases where the angle between the two lines, sides, surfaces, etc. is within a range of 90°±10°.

[0020] The deck plate 10 is used as a temporary formwork when forming a slab. The slab is constructed by pouring concrete onto a plurality of deck plates 10. The slab is supported by being placed on installation surfaces 8 arranged at intervals. Each installation surface 8 is, for example, the upper surface of a beam 81. The beam 81 includes a main beam and a secondary beam. Examples of the beam 81 include a precast beam (PCa beam) and a steel beam.

[0021] As shown in Figures 2(A) and 2(B), the deck plate 10 comprises a base plate 1, a plurality of reinforcing bar trusses 2 arranged on the base plate 1, a plurality of suspension members 3, and reinforcing steel bars 5 including reinforcing trusses 7. Note that in Figure 1, for ease of explanation, the reinforcing bar trusses 2 are indicated by two-dot chain lines, the reinforcing trusses 7 are indicated by single-dot chain lines, and other reinforcing bars in the suspension members 3 and reinforcing steel bars 5 are omitted. As shown in Figure 1, each deck plate 10 according to this embodiment comprises, on the base plate 1, two rows of reinforcing bar trusses 2 and one row of reinforcing trusses 7. However, in the present invention, each deck plate 10 may comprise three or more rows of reinforcing bar trusses 2 and two or more rows of reinforcing trusses 7.

[0022] (Substrate 1) As shown in Figures 2(A) and (B), the base plate 1 is disposed below a plurality of reinforcing bar trusses 2. The base plate 1 constitutes one surface (lower surface) of the slab in the thickness direction. An example of the material for the base plate 1 is a hot-dip galvanized steel sheet. The base plate 1 is formed in a rectangular shape in a plan view. For example, the base plate 1 has a thickness of 0.4 mm, a width of 600 mm, and a length of 600 mm or more and 7000 mm or less. The base plate 1 may be a corrugated plate with ribs formed along the length direction at intervals in the width direction, or may be a flat plate without ribs.

[0023] (Rebar truss 2) As shown in FIG. 2(A), both longitudinal ends of the reinforcing bar truss 2 are supported on the installation surface 8. Multiple reinforcing bar trusses 2 are arranged at intervals in the width direction. Each reinforcing bar truss 2 includes upper end reinforcements 21 and lower end reinforcements 22 that extend linearly in the longitudinal direction, and corrugated lattice reinforcement 23 that connects the upper end reinforcement 21 and the lower end reinforcement 22. In this embodiment, the lattice reinforcement 23 is formed in a corrugated shape, but it does not have to be corrugated as long as it can connect the upper end reinforcement 21 and the lower end reinforcement 22. In this specification, the term "lattice reinforcement 23" also includes non-corrugated members that connect the upper end reinforcement 21 and the lower end reinforcement 22.

[0024] The upper end reinforcing bars 21 and the lower end reinforcing bars 22 extend parallel to each other. The upper end reinforcing bars 21 are located higher than the lower end reinforcing bars 22. In this embodiment, the upper end reinforcing bars 21 and the lower end reinforcing bars 22 are located on the same vertical plane. The upper end reinforcing bars 21 and the lower end reinforcing bars 22 are fixed to end members 4 arranged at positions corresponding to both ends in the length direction, and are supported on the installation surface 8 by the end members 4.

[0025] The end member 4 connects the upper end reinforcing bars 21 and the lower end reinforcing bars 22 to the installation surface 8. The end member 4 is formed, for example, by bending a steel bar with a circular cross section at a right angle (L-shape). In the end member 4, the portion extending perpendicular to the installation surface 8 (hereinafter referred to as the upright portion 41) is fixed to the upper end reinforcing bars 21 and the lower end reinforcing bars 22. The portion extending parallel to the installation surface 8 (hereinafter referred to as the horizontal portion 42) extends in the length direction while contacting the upper surface of the substrate 1 and protrudes from the edge of the substrate 1 above the installation surface 8. The upper end reinforcing bars 21 and the lower end reinforcing bars 22 are preferably fixed to the upright portion 41 by welding. In addition, the horizontal portion 42 is preferably welded to the substrate 1. The tip of the horizontal portion 42 is attached to the installation surface 8 by, for example, a substantially Ω-shaped mounting bracket 9. The mounting bracket 9 is attached to the installation surface 8 by, for example, welding, bonding with an adhesive, or driving a rivet. However, the tip of the horizontal portion 42 may be attached to the installation surface 8 directly by welding, without using the mounting bracket 9.

[0026] The end members 4 may be fixed to the reinforcing bar truss 2 in advance at the time of shipment from the factory, or may be fixed to the deck plate 10 during on-site construction (i.e., may be attached later). The end members 4 do not necessarily have to be L-shaped as long as they can support the reinforcing bar truss 2 on the installation surface 8, and may be, for example, linear, rectangular, triangular, etc.

[0027] (Hanging material 3) As shown in Figure 2(B), the hanger members 3 connect the multiple reinforcing bar trusses 2 lined up in the width direction, and also connect the multiple reinforcing bar trusses 2 to the base plate 1. The multiple hanger members 3 extend in the width direction in a plan view, and adjacent hanger members 3 in the length direction are parallel to each other. The multiple hanger members 3 are arranged on the base plate 1 at regular intervals in the length direction.

[0028] As shown in FIG. 2(B), the hanger 3 has mountain-shaped peaks 31 and connection portions 32 extending from the lower ends of the peaks 31 along the upper surface of the base plate 1, which are alternately formed in the width direction. In this embodiment, the peaks 31 and connection portions 32 are integrally formed by bending a wire (e.g., an iron wire). Upper end reinforcement bars 21 are fixed to the upper ends of the peaks 31. The upper end reinforcement bars 21 are preferably fixed by welding to the inside corners of the upper ends of the peaks 31. The base plate 1 is also preferably fixed to the connection portions 32 by welding. In this way, the base plate 1 is supported by the reinforcing bar trusses 2 below the reinforcing bar trusses 2.

[0029] (Reinforcing steel bar 5) The reinforcing bars 5 are reinforcing bars that are installed, for example, on-site, to reinforce the deck plate 10 at the time of manufacture (when shipped from the factory). If the deck plate 10 at the time of manufacture does not meet the required strength (for example, allowable slab thickness, allowable span length), the strength of the deck plate 10 can be increased by reinforcing the deck plate 10 at the time of manufacture with the reinforcing bars 5.

[0030] As shown in Fig. 3, the reinforcing steel bars 5 include a plurality of transmission bars 6 and one or more reinforcing trusses 7. The number of reinforcing trusses 7 is preferably set appropriately depending on the strength required for the slab. In this embodiment, one reinforcing truss 7 is attached between adjacent reinforcing bar trusses 2.

[0031] (Transmitter Muscle 6) The transmission bars 6 connect the multiple reinforcing bar trusses 2 and the reinforcing trusses 7. The transmission bars 6 extend linearly in the width direction, and the longitudinal direction of the transmission bars 6 is perpendicular to the longitudinal direction of the upper end bars 21 of the reinforcing bar trusses 2. The multiple transmission bars 6 are also arranged at intervals in the longitudinal direction.

[0032] As shown in FIG. 4, the transmission reinforcement 6 is preferably connected to the upper end reinforcement 21 below the upper end reinforcement 21 of the multiple reinforcing bar trusses 2. This allows the upper end reinforcement 21 of the reinforcing bar trusses 2 to effectively bear the upward load transmitted from the reinforcing trusses 7. From the viewpoint of rigidity, the nominal diameter of the transmission reinforcement 6 is preferably D10 or more and D16 or less. Of these, D10 is more preferable from the viewpoint of workability. The "nominal diameter" here refers to the nominal diameter specified in JIS G 3112:2020.

[0033] It is preferable that the multiple transmission bars 6 are parallel to each other, as shown in Fig. 3. Furthermore, it is preferable that the connection between the top end bars 21 of the reinforcing bar truss 2 and each transmission bar 6 is made by a binding wire (sometimes called a binding wire fastening). This allows the transmission bars 6 to be connected to the reinforcing bar truss 2 with good workability. However, the connection between each transmission bar 6 and the top end bars 21 of the reinforcing bar truss 2 may be made by fastening, for example, by welding, reinforcing bar clips, or the like, in addition to the binding wire fastening.

[0034] The pitch P1 of the multiple transmission bars 6 is preferably 90 mm or more and 250 mm or less, more preferably 140 mm or more and 200 mm or less, and even more preferably 160 mm or more and 180 mm or less. By configuring in this way, the number of transmission bars 6 can be minimized while improving the structural integrity of the reinforcing bar truss 2 and the reinforcing truss 7.

[0035] In this embodiment, the transmission reinforcement 6 is connected only to the upper end reinforcement 21 of the reinforcing bar truss 2, without being connected to the lattice reinforcement 23. However, the transmission reinforcement 6 may be placed in a position sandwiched between the reinforcing bar truss 2 and the lattice reinforcement 23, and may be fixed to both the reinforcing bar truss 2 and the lattice reinforcement 23 by welding.

[0036] The transmission reinforcement 6 in this embodiment is connected so as to span only multiple reinforcing bar trusses 2 on one deck plate 10, but it may also be connected so as to span multiple reinforcing bar trusses 2 on multiple deck plates 10, for example.

[0037] (Reinforced truss 7) As shown in FIG. 2(B), the reinforcing truss 7 is placed between adjacent reinforcing bar trusses 2, between the connection portion 32 of the hanging member 3 and the transfer bar 6. In this state, the transfer bar 6 and the reinforcing truss 7 are connected. As shown in FIG. 4, the reinforcing truss 7 includes upper end bars 71 and lower end bars 72 that extend linearly in the longitudinal direction, and corrugated lattice bars 73 that connect the upper end bars 71 and the lower end bars 72. Like the reinforcing bar truss 2, the reinforcing truss 7 has corrugated lattice bars 73, but the members connecting the upper end bars 71 and the lower end bars 72 do not have to be corrugated. The upper end bars 71 and the lower end bars 72 extend parallel to each other. The upper end bars 71 are located higher than the lower end bars 72. In this embodiment, the upper end bars 71 and the lower end bars 72 are located on the same vertical plane.

[0038] The reinforcing truss 7 preferably has the same structure as the reinforcing bar truss 2. This allows the existing reinforcing bar truss 2 to be used as the reinforcing truss 7, making inventory management easier.

[0039] As with the reinforcing bar truss 2, the reinforcing truss 7 is fixed to end members 4 arranged at positions corresponding to both longitudinal ends of the upper end reinforcement 71 and the lower end reinforcement 72, as shown in Fig. 4. In other words, the reinforcing truss 7 is supported on the installation surface 8 by the end members 4.

[0040] The end member 4 connects the upper end reinforcement 71 and the lower end reinforcement 72 of the reinforcing truss 7 to the installation surface 8. The end member 4 may have the same structure as the end member 4 supporting the reinforcing bar truss 2. The upper end reinforcement 71 and the lower end reinforcement 72 of the reinforcing truss 7 and the upright portion 41 are preferably fixed by, for example, welding. The tip of the horizontal portion 42 is attached to the installation surface 8 by, for example, a substantially Ω-shaped mounting bracket 9. The end member 4 is preferably fixed to the reinforcing truss 7 during on-site construction.

[0041] As shown in FIG. 4, the upper end reinforcement 71 of the reinforcing truss 7 is connected to the transfer reinforcement 6. The connection between each transfer reinforcement 6 and the upper end reinforcement 71 of the reinforcing truss 7 is realized, for example, by welding, fixing with reinforcing bar clips, or binding wire. As shown in FIG. 3, among the connection points of the upper end reinforcement 71 of the reinforcing truss 7 to the multiple transfer reinforcements 6, it is preferable that the connection strength of the longitudinal center portion R1 is stronger than the connection strength of the longitudinal end portions R2. Here, the "longitudinal center portion R1" refers to the connection point S1 within a region obtained by dividing a predetermined dimension D1 into two equal parts from the exact center CL1 of the longitudinal direction of the reinforcing truss 2. The "predetermined dimension D1" is preferably one-third of the total length of the reinforcing truss 2 in the longitudinal direction.

[0042] Specifically, in this embodiment, among the connection points of the upper end reinforcement 71 of the reinforcing truss 7 to the multiple transmission reinforcements 6, the connection point S1 at the center R1 is fixed by welding or a reinforcing bar clip. On the other hand, the connection point S2 at the end R2 in the longitudinal direction (the connection point in the region closer to the end than the center) is fastened by a binding wire. The connection between reinforcing bars by welding and a reinforcing bar clip has a stronger connection strength than the connection between reinforcing bars by a binding wire. An example of a reinforcing bar clip is a metal clip manufactured by Arc Ace Co., Ltd.

[0043] As shown in Figure 2(B), it is preferable that the bottom end reinforcement 72 of the reinforcing truss 7 rest on the connection part 32 of the hanging member 3. This makes it easier to fix the reinforcing truss 7 to the installation surface 8 using the end member 4 while it is resting on the connection part 32, improving workability.

[0044] (Reinforcement method) Reinforcement using the reinforcing trusses 7 is performed at a construction site, for example, as follows: As shown in FIG. 5(A), an unreinforced deck plate 10 (hereinafter sometimes referred to as the "existing deck plate") is placed on the beams 81 so that both longitudinal ends rest on the beams 81, and then laid onto the beams 81. The reinforcing method according to this embodiment is then applied to the existing deck plate. The reinforcing method according to this embodiment involves a preparation step, a transmission bar connecting step, a reinforcing truss fixing step, and a connection step, which are carried out in this order.

[0045] The preparation process is a preparatory step for reinforcing an existing deck plate. In the preparation process, as shown in Figure 5(A), reinforcing trusses 7 are temporarily placed between adjacent reinforcing trusses 2 on the existing deck plate.

[0046] The transmission bar connecting process is a process of connecting transmission bars 6 to multiple reinforcing bar trusses 2 of an existing deck plate. In the transmission bar connecting process, as shown in FIG. 5(B), the transmission bars 6 are connected to the upper end bars 21 of the reinforcing bar truss 2 while being positioned below the upper end bars 21. The transmission bars 6 are preferably connected to the upper end bars 21 with tie wires. In the transmission bar connecting process, multiple transmission bars 6 are connected to the upper end bars 21 at intervals in the longitudinal direction of the reinforcing bar truss 2.

[0047] The reinforcing truss fixing process is a process of supporting the reinforcing truss 7 on the installation surface 8. In the reinforcing truss fixing process, the reinforcing truss 7 is erected as shown in FIG. 5(C). Then, with the reinforcing truss 7 placed on the connection portion 32 of the hanging member 3, the end portion in the longitudinal direction of the reinforcing truss 7 is fixed to the installation surface 8 using the end member 4 (see FIG. 4).

[0048] The connecting process is a process of connecting the multiple transmission bars 6 to the upper end bars 71 of the reinforcing truss 7. In the connecting process, the upper end bars 71 of the reinforcing truss 7, which are standing upright below the multiple transmission bars 6, are connected to the multiple transmission bars 6. The upper end bars 71 of the reinforcing truss 7 and the transmission bars 6 are preferably connected by, for example, welding, rebar clips, binding wires, etc.

[0049] According to the embodiment described above, the reinforcing truss 2 and the reinforcing truss 7 can be integrated into a single structure. Therefore, even if the deck plate 10 at the time of manufacture does not have the required strength, the strength of the deck plate 10 can be improved by reinforcing it on-site. As a result, a slab can be constructed without installing shoring, expanding the area in which concrete can be poured without shoring. Furthermore, if an opening needs to be formed in the slab, even if the reinforcing truss 2 within the opening is cut, the reinforcing truss 7 can compensate for the loss of strength.

[0050] <Modification> The above embodiment is merely one of various embodiments of the present invention. The embodiment can be modified in various ways depending on the design, etc., as long as the object of the present invention can be achieved. Modifications of the embodiment are listed below. The modifications described below can be applied in appropriate combinations.

[0051] In the above embodiment, the reinforcing bar truss 2 has the upper end reinforcement 21 and the lower end reinforcement 22 positioned on the same vertical plane, but the reinforcing bar truss 2 may also be composed of, for example, two lower end reinforcement 22 spaced apart in the width direction, one upper end reinforcement 21, and a lattice reinforcement 23 connecting them.

[0052] In the deck plate 10 according to the above embodiment, one reinforcing truss 7 is attached between the two reinforcing trusses 2, but two or more reinforcing trusses 7 may be attached between the two reinforcing trusses 2.

[0053] In the deck plate 10 according to the above embodiment, a method has been described in which the reinforcing steel bars 5 are processed on-site into an existing deck plate. However, if a lack of strength is anticipated in advance, the deck plate 10 incorporating the reinforcing steel bars 5 may be manufactured in a manufacturing factory.

[0054] In the above embodiment, the slab constitutes the floor structure of a building, but the present invention may also be applied to a roof structure or a wall structure. [Explanation of symbols]

[0055] 10 Deck Plate 1 board 2 Reinforced concrete truss 21 Top bar 22 Bottom reinforcement 23 Lattice muscle 3 Hanging material 31 Yamabe 32 Connection 4 End member 5 Reinforcing steel bars 6 Transmitter muscles 7 Reinforced Truss 71 Upper end muscle 72 Lower end reinforcement 73 Lattice Muscle 8 Installation surface 81 Beam

Claims

1. A plurality of reinforcing bar trusses, each having both ends in a length direction supported on an installation surface and spaced apart in a width direction; a base plate disposed below the plurality of rebar trusses; A plurality of suspension members extending in the width direction in a plan view, connecting the plurality of reinforcing bar trusses, and connected to the base plate between adjacent reinforcing bar trusses, are provided, the suspension members being spaced apart in the length direction; A deck plate with a reinforcing bar truss, wherein each reinforcing bar truss has upper and lower end bars extending in the longitudinal direction, and lattice bars connecting the upper and lower end bars, A plurality of transmission reinforcements extending linearly along the width direction, connected to the upper end reinforcements of the plurality of reinforcing bar trusses, and spaced apart in the length direction; A reinforcing truss is provided between adjacent reinforcing bar trusses, and both ends in the length direction are supported on the installation surface, A plurality of the transmission reinforcements and the reinforcing truss are connected to each other. Deck plate with rebar truss.

2. The transmission reinforcement is connected to the upper end reinforcement below the upper end reinforcement of the plurality of reinforcing bar trusses. The deck plate with reinforcing bar trusses according to claim 1.

3. The reinforcing truss An upper end muscle extending in the longitudinal direction and connected to the plurality of transmission muscles; A lower end stripe is disposed below the upper end stripe and spaced apart from the lower end stripe, and extends in the length direction. A lattice muscle connecting the upper end muscle and the lower end muscle; having The deck plate with reinforcing bar trusses according to claim 1 or 2.

4. The plurality of hanging members include: A peak portion connected to the reinforcing bar truss; a connection portion connected to the mountain portion and to the substrate; and The bottom reinforcement of the reinforcing truss rests on the connection portion. The deck plate with reinforcing bar trusses according to claim 3.

5. Among the connection points of the upper end reinforcement of the reinforcing truss to the plurality of transmission reinforcements, the connection strength of the central part in the longitudinal direction is stronger than the connection strength of the end part in the longitudinal direction; The deck plate with reinforcing bar trusses according to claim 3.

6. Among the connection points of the upper end reinforcement of the reinforcing truss to the plurality of transmission reinforcements, the connection points in the center of the length direction are fixed by welding or rebar clips, and the connection points on the end side of the center of the length direction are fastened by binding wires. The deck plate with reinforcing bar trusses according to claim 5.

7. The nominal diameter of the transmission reinforcement is D10 or more. The deck plate with reinforcing bar trusses according to claim 1 or 2.

8. A plurality of reinforcing bar trusses, each having both ends in the length direction supported on an installation surface and spaced apart in the width direction; a base plate disposed below the plurality of rebar trusses; A plurality of suspension members extending in the width direction in a plan view, connecting the plurality of reinforcing bar trusses, and connected to the base plate between adjacent reinforcing bar trusses, are provided, the suspension members being spaced apart in the length direction; Each of the reinforcing bar trusses has an upper end bar, a lower end bar spaced below the upper end bar, and a lattice bar connecting the upper end bar and the lower end bar. A method for reinforcing a deck plate with a rebar truss, comprising: A process of arranging a plurality of transmission bars extending linearly along the width direction at intervals in the length direction and connecting them to the upper end bars of a plurality of the reinforcing bar trusses; a step of placing a reinforcing truss between adjacent reinforcing bar trusses and below the plurality of transmission bars, and supporting both ends of the reinforcing truss in the length direction on an installation surface; a step of connecting the reinforcing truss and a plurality of the transmission reinforcements; Including, How to reinforce deck plates with rebar trusses.

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