Deck plate and deck plate structure

Abstract

Provided are a deck plate and a deck plate structure which make it possible to easily take measures against a gap in a partition wall.　A deck plate (10) comprises: a flat plate part (11) that comprises one plate-like member extending in a first direction (X) and a second direction (Y); and rib parts (20) that have ribs (21) which are disposed at an interval in the first direction (X), and which protrude from the flat plate part (11) toward one side in a third direction (Z) and extend in the second direction (Y). Concrete (C) is to be placed on a surface (11B) on one side in the third direction (Z) of the flat plate part (11). The ribs (21) each include a plate-mating portion (23) where portions of the plate-like member are folded and bent toward the one side in the third direction (Z) and the portions of the plate-like member overlap in the first direction (X). Through-holes (25), which allow insertion therethrough of members to be embedded in the concrete (C), are formed in at least one plate-mating portion (23) of the plurality of ribs (21) of the rib parts (20).

Description

Deck plate and deck plate structure

[0001] The present invention relates to a deck plate and a deck plate structure, and more specifically to a deck plate (hereinafter sometimes referred to as a "flat deck") that includes a flat plate portion and ribs protruding from the flat plate portion, and a deck plate structure that includes such a deck plate.

[0002] When flat decks like the one described above are used for concrete slabs, concrete can be poured evenly on the top surface of the flat plate (the surface opposite the side where the ribs are provided), allowing for rational design as a versatile reinforced concrete slab. Furthermore, the increased rigidity of the slab can be advantageous in terms of improving the building's vibration performance, sound insulation, and other aspects of livability. For these reasons, flat decks are widely used as useful building components.

[0003] In buildings, certain areas are often partitioned by walls or floors to prevent the spread of fires. In buildings such as office buildings, parting walls are constructed perpendicular to the concrete slab to separate individual rooms. In such cases, when a flat deck is used, ribs protrude from the side opposite the concrete pouring side (upper side). When attempting to join a partition wall or parting wall (hereinafter referred to as a "parting wall") to the concrete slab, gaps due to the ribs form between the flat deck's flat plate and the top surface of the parting wall. Such gaps can allow flames, smoke, noise, temperature, and humidity to penetrate despite the presence of the partition wall, making them undesirable from the standpoints of fire prevention and livability. Therefore, for example, Patent Document 1 proposes filling the interior of each rib and the space between adjacent ribs with a non-combustible material. In another example, the ribs of the flat deck where the parting wall is connected are removed.

[0004] Japanese Patent Application Laid-Open No. 2023-112945

[0005] However, in the example of Patent Document 1, the construction site needs to fill in non-combustible materials, and in other examples, the construction site needs to remove the ribs. Therefore, there is a need for a deck plate (flat deck) that can easily address gaps in partition walls.

[0006] The present invention has been made in consideration of the above points, and one of its objects is to provide a deck plate and a deck plate structure that can easily address gaps in partition walls.

[0007] (1): The deck plate according to the present invention includes a flat plate portion consisting of a single plate-like member extending in a first direction and a second direction intersecting the first direction, and a rib portion including ribs projecting from the flat plate portion toward one side in a third direction intersecting the flat plate portion and extending in the second direction, the ribs being spaced apart in the first direction, the one surface of the flat plate portion in the third direction being a surface on which concrete is poured, the rib including a joint portion where the plate-like member is bent toward the one side in the third direction so that portions of the plate-like member overlap in the first direction, and at least one of the ribs in the rib portion has a through hole formed in the joint portion through which a member to be embedded in the concrete can be inserted. Note that the ribs in the rib portion are spaced apart in the first direction as described above, and the through hole is formed in one or more of the ribs. Examples of components that are embedded in concrete include components for supporting reinforcing bars (hereinafter referred to as "spacers") and pipes that are embedded in concrete (concrete slabs).

[0008] (2): In the deck plate of (1), a plurality of the through holes may be formed in the plate joint along the second direction at intervals of 50 to 1000 mm.

[0009] (3) In the deck plate of (1) or (2), the through hole may have a shape in which the second direction is the major axis direction and the third direction is the minor axis direction. Specifically, the through hole may have an elliptical, rectangular, or diamond shape in which the second direction is the major axis direction and the third direction is the minor axis direction.

[0010] (4) In the deck plate of any one of (1) to (3), the through hole may have an area slightly larger than the area of ​​a cross section perpendicular to the longitudinal direction of the member.

[0011] (5) The deck plate structure according to the present invention comprises the deck plate according to any one of (1) to (4) and the member inserted into the through hole.

[0012] (6): In the deck plate structure of (5), a distribution reinforcement may be further provided on the one side of the member in the third direction.

[0013] (7): In the deck plate structure of (6), the reinforcing bars may be in contact with the one side surface of the rib in the third direction.

[0014] According to the present invention, a deck plate and a deck plate structure are provided that can easily address gaps in partition walls.

[0015] Fig. 3 is a diagram schematically showing a part of the concrete slab of the present invention. Fig. 4 is a diagram schematically showing a cross section of the concrete slab shown in Fig. 1 along a third direction. Fig. 5 is a diagram of a part of the deck plate shown in Fig. 1 as viewed in a first direction. Fig. 6 is a diagram schematically showing a cross section of a modified example of the concrete slab shown in Fig. 1 along a third direction. Fig. 7 is a diagram schematically showing a modified example of the through hole shown in Fig. 3.

[0016] Below, embodiments for implementing a deck plate and deck plate structure according to the present invention are illustrated with reference to the accompanying drawings. The embodiments illustrated below are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention can be modified or improved from the following embodiments without departing from the spirit of the present invention. In addition, in the accompanying drawings, the dimensions of each component may be exaggerated or reduced, and hatching may be omitted, in order to facilitate understanding.

[0017] FIG. 1 is a schematic diagram illustrating a portion of a concrete slab according to this embodiment. As shown in FIG. 1 , the concrete slab 1 according to this embodiment includes concrete C and a deck plate structure 100 embedded in the concrete C. Note that in FIG. 1 , the concrete C is schematically illustrated by a dashed line to clearly show the deck plate structure 100 embedded in the concrete C. The deck plate structure 100 of the concrete slab 1 includes a deck plate 10 having a first direction X as the deck width direction and a second direction Y as the deck longitudinal direction, which intersects with the first direction (perpendicular to the first direction in this embodiment). The concrete C is poured onto the deck plate 10 in a third direction Z that intersects with both the first direction X and the second direction Y (perpendicular to the first direction in this embodiment). The length of the concrete C in the third direction Z is the thickness of the concrete slab 1. The third direction Z corresponds to the vertical direction in a building including the concrete slab 1 and intersects with (perpendicular to) a flat plate portion 11 (described later) of the deck plate 10 (in this embodiment, perpendicular to the third direction Z).

[0018] 2 is a diagram schematically illustrating a cross section of the concrete slab 1 along the third direction Z. As shown in FIGS. 1 and 2 , the deck plate structure 100 of the concrete slab 1 includes the above-described deck plate 10, spacers 110, main reinforcements 111, and reinforcing bars 120. In this embodiment, the deck plate structure 100 further includes one or more pipes 101. Note that the deck plate structure 100 does not necessarily include the pipes 101. The spacers 110, main reinforcements 111, reinforcing bars 120, and pipes 101 are embedded in the concrete C.

[0019] The deck plate 10 is a flat deck formed by bending a single metal plate (plate-shaped member) and includes a flat plate portion 11 and a rib portion 20. The plate portion 11 is a rectangular or square plate-shaped portion extending in the first direction X and the second direction Y, and is made of the single metal plate. The plate portion 11 has a surface (upper surface 11B) on one side in the third direction Z (hereinafter sometimes referred to as the "upper side") and a surface (lower surface 11A) on the other side in the third direction Z (hereinafter sometimes referred to as the "lower side"). Concrete C is poured onto the upper surface 11B of the plate portion 11. In other words, the surface 11B on one side of the plate portion 11 in the third direction Z is the surface on which the concrete C is poured. The lower surface 11A of the plate portion 11 is substantially flat and may be embossed or ridged for the purpose of improving rigidity, etc.

[0020] A rib portion 20 protrudes upward (to one side in the third direction Z) from the flat plate portion 11. That is, the rib portion 20 protrudes from the flat plate portion 11 toward the side where the concrete C is poured. Therefore, in the concrete slab 1, the rib portion 20 is embedded in the concrete C. The rib portion 20 includes a plurality of ribs 21 arranged at intervals in the first direction X. Each of the plurality of ribs 21 protrudes upward (to one side in the third direction Z) from the flat plate portion 11 and extends in the second direction Y. Each of the plurality of ribs 21 includes a plate joint portion 23 and a flange portion 24.

[0021] The plate joint portion 23 is a linear portion extending upward (to one side in the third direction Z) from the flat plate portion 11. The plate joint portion 23 is a portion where the above-mentioned single metal plate (plate-shaped member) is bent upward by, for example, bending, so that parts of the single metal plate overlap each other in the first direction X. Parts of the overlapping parts of the single metal plate that form the plate joint portion 23 are crimped together to form one unit. The plate joint portion 23 has one or more through holes 25 that penetrate the plate joint portion 23 in the first direction X. In this embodiment, the multiple through holes 25 are formed in the plate joint portion 23 and aligned in a straight line extending in the second direction Y.

[0022] FIG. 3 is a diagram showing a portion of one rib 21 as viewed in the first direction X. As shown in FIG. 3 , in this embodiment, the through hole 25 has a shape with its major axis extending in the second direction Y and its minor axis extending in the third direction Z. FIG. 3 illustrates an example in which the through hole 25 is elliptical. In this specification, the term "elliptical" includes not only ellipse but also shapes similar to ellipse, such as an oval or track shape. The shape of the through hole 25 may also be rectangular or diamond-shaped, which have their major axis extending in the second direction Y and their minor axis extending in the third direction Z. In this embodiment, the through hole 25 has a major axis La and a minor axis Sa. The dimensions of the through hole 25 are not particularly limited, but the length of the minor axis Sa may be approximately 5 mm to 15 mm. For example, the length of the minor axis Sa of the through hole 25 may be slightly greater than 4 mm or slightly greater than 5 mm. Here, "slightly larger" means that there is a clearance between the object (hereinafter simply referred to as "object") to be inserted into through hole 25, such as a spacer, and through hole 25 in the third direction Z to such an extent that the object can be inserted into through hole 25, but when the state in which the object is inserted into through hole 25 is visually confirmed, the object can be recognized as fitting into through hole 25 in the third direction Z. Note that the shape of through hole 25 is not limited to an elliptical shape.

[0023] Furthermore, in this embodiment, the multiple through holes 25 are formed at equal intervals along the second direction Y. The interval Gp between two adjacent through holes 25 in the second direction Y (the distance from the center of one through hole 25 to the center of the other through hole 25 of a pair of adjacent through holes 25) is not particularly limited, but may be, for example, approximately 50 mm to 1000 mm, 50 mm to 300 mm, 130 mm to 290 mm, or 170 mm to 280 mm. In this embodiment, the interval Gp is ​​130 mm. Furthermore, the through holes 25 may be holes (crimping holes) formed when portions of the two overlapping portions of the metal plates are crimped together to form the plate joint portion 23, or may be holes formed by penetrating the plate joint portion 23 separately from the crimping holes.

[0024] As shown in Figures 1 and 2, the flange portion 24 of the rib 21 is connected to the end of the plate joint portion 23 on the opposite side from the flat plate portion 11 (i.e., the upper side). The cut surface of the flange portion 24 in the third direction Z is generally triangular. One surface of the flange portion 24 in the third direction Z (upper surface 24A) is a flat surface extending in the first direction X and the second direction Y. However, the cross-sectional shape of the flange portion 24 is not limited to a triangular shape. Although not shown, the end of each of the ribs 21 in the second direction Y may be end-closed.

[0025] In the concrete slab 1, multiple deck plates 10 are arranged in the first direction X and laid on a framework, such as a steel frame, with the multiple deck plates 10 connected to each other. Concrete C is then poured onto the upper surface 11B of each flat portion 11 of the multiple deck plates 10 laid on the framework, thereby constructing the concrete slab 1. The method for connecting a pair of adjacent deck plates (one deck plate 10 and the other deck plate 10) in the first direction X is not particularly limited. For example, one end of one deck plate 10 in the first direction X may be bent upward to form a bent portion (not shown), and this bent portion may be inserted between the overlapping portions of the two-plate joint 23 of the other deck plate 10 that are closest to the other side in the first direction X, thereby connecting the first deck plate 10 and the other deck plate 10.

[0026] As shown in FIGS. 1 and 2 , the spacers 110 of the deck plate structure 100 are formed, for example, from wire rods and are components for supporting main reinforcements 111 (reinforcing bars) extending in the second direction Y, which is the longitudinal direction of the ribs 21. In this embodiment, the spacers 110 support a plurality of main reinforcements 111 arranged at equal intervals in the first direction X. The plurality of main reinforcements 111 may be arranged at intervals of approximately 150 mm to approximately 250 mm in the first direction X, and the plurality of spacers 110 may be arranged at intervals of approximately 150 mm to approximately 1000 mm in the second direction Y. In this embodiment, the plurality of spacers 110 are arranged at intervals of 1000 mm. The diameter of the cross section of the spacer 110 perpendicular to the longitudinal direction may be approximately 2 mm to 8 mm. In this embodiment, the diameter of the cross section of the spacer perpendicular to the longitudinal direction is 4 mm.

[0027] Focusing on one of the ribs 21 at the joint 23, spacers 110 are inserted in one-to-one correspondence through some of the through holes 25 formed at equal intervals along the second direction Y. That is, one of the spacers 110 is inserted through one through hole 25, and another of the spacers 110 is inserted through another through hole 25. In this embodiment, as described above, the spacing Gp between adjacent through holes 25 is 130 mm, but adjacent spacers 110 may be installed in any of the through holes. For example, in this embodiment, the spacing between adjacent spacers 110 is 910 mm. In this manner, when the spacing between adjacent spacers 110 is 910 mm, there are five through holes 25 through which a spacer 110 is not inserted between the through holes 25 through which a spacer 110 is inserted. When the spacers 110 are arranged at intervals of approximately 150 mm to 1000 mm, by setting the spacing Gp of the through holes 25 to 130 mm as in this embodiment, the spacers 110 can be positioned accurately on the deck plate and the main reinforcement 111 can be supported accurately.

[0028] For convenience, Figure 1 shows an example in which there are two through holes 25 between the through hole 25 through which one of a pair of adjacent spacers 110 in the second direction Y is inserted and the through hole 25 through which the other of the pair of spacers 110 is inserted.However, the number of through holes 25 through which no spacer 110 is inserted, which are located between the through hole 25 through which one of a pair of adjacent spacers 110 in the second direction Y is inserted and the through hole 25 through which the other of the pair of spacers 110 is inserted, is not particularly limited, and may be five as described above, two, or some other number.

[0029] Then, by inserting the spacers 110 into the through holes 25 as described above, the plurality of spacers 110 are bridged across the respective plate joints 23 of the plurality of ribs 21, and further, each of the plurality of main reinforcements 111 is disposed between adjacent plate joints 23, 23 in the first direction X. In this manner, in this embodiment, the spacers 110 are disposed in a position above the flat plate portion 11 (i.e., at the position where the plate joints 23 are located in the third direction Z).

[0030] The spacer 110 does not need to be long enough to span all of the ribs 21 of the rib portion 20; for example, it may be slightly longer than the distance between two adjacent ribs 21. In this case, the spacer 110 spans only two adjacent ribs 21. For example, when the spacer 110 spans only two adjacent ribs 21, it is not necessary to form through holes 25 in the joint portions 23 of all ribs 21 of the rib portion 20. For example, it is possible not to form through holes 25 in the joint portions 23 of the ribs 21 located on the outermost and outermost sides in the first direction X. In other words, in the deck plate 10 of this embodiment, a through hole 25 is formed in the joint portion 23 of at least one of the ribs 21 of the rib portion 20, allowing the insertion of a member (spacer 110) for supporting reinforcing bars embedded in the concrete C.

[0031] 1 , focusing on the plate joint 23 of one of the ribs 21, in this embodiment, a pipe 101 can be inserted into one or more of the through holes 25 through which a spacer 110 is not inserted. Here, the pipes include various types of pipes buried in a concrete slab, such as electrical pipes, air conditioning pipes, and gas pipes. In another example, the length of the major axis La of the through hole 25 may be longer than that shown in the figure, and the pipe 101 may be inserted into the through hole 25 through which the spacer 110 is inserted.

[0032] As shown in FIG. 2 , the deck plate structure 100 further includes reinforcing bars 120 located above the spacer 110 (on one side in the third direction Z). The reinforcing bars 120 are located on the opposite side of the spacer 110 from the flat plate portion 11 in the third direction Z. The reinforcing bars 120 are formed in a mesh pattern and include main reinforcements 121 extending in the second direction Y, which is the longitudinal direction of the rib 21, and distribution reinforcements 122 extending in the first direction X. That is, the deck plate structure 100 further includes distribution reinforcements 122 in addition to the deck plate 10, spacer 110, and main reinforcements 111. In this embodiment, the reinforcing bars 120 include a plurality of main reinforcements 121 arranged at equal intervals in the first direction X and a plurality of distribution reinforcements 122 arranged at equal intervals in the second direction Y. The reinforcing bars 120 may have the same configuration (diameter of the main reinforcement and distribution reinforcement, spacing between the main reinforcement and distribution reinforcement, etc.) as the main reinforcement bars 111, or may have a different configuration. In this embodiment, the reinforcing bars 120 are located above the upper surfaces 24A of the flange portions 24 of each of the multiple ribs 21, and are arranged at intervals from the upper surfaces 24A.

[0033] As described above, the deck plate 10 according to this embodiment includes a flat plate portion 11 made of a single plate-like member extending in the first direction X and the second direction Y, and a rib portion 20 in which ribs 21 protrude from the flat plate portion 11 toward one side (upper side) in the third direction Z intersecting the flat plate portion 11 and extend in the second direction Y, and are spaced apart in the first direction X. In this deck plate 10, one surface (upper surface 11B) of the flat plate portion 11 in the third direction Z is the surface on which concrete C is poured, and the rib 21 includes a plate joint portion 23 in which one plate-like member is bent toward one side (upper side) in the third direction Z so that parts of the plate-like members overlap in the first direction X. The plate joint portion 23 is formed with a through-hole through which a spacer 110, a pipe 101, or the like to be embedded in the concrete C can be inserted. The deck plate structure 100 according to this embodiment also includes the above-described deck plate 10 and a spacer 110 inserted into the through hole 25 of the deck plate 10 .

[0034] In a formwork using the deck plate 10 according to this embodiment, the rib portion 20 of the deck plate 10 faces upward (the side where the concrete C is poured), and the flat lower surface 11A of the flat portion 11 of the deck plate 10 faces downward (the side opposite to the side where the concrete C is poured). That is, in this embodiment, the vertically lower surface (bottom surface) of the concrete slab 1 is flat, so that the partition wall can be joined to the concrete slab 1 without gaps. Therefore, with the deck plate 10 and deck plate structure 100 according to this embodiment, it is possible to address gaps in the partition walls without cutting out the rib portion 20 or filling the spaces between adjacent ribs 21, 21 or the internal spaces of the flange portions 24 with an injection material such as a fire retardant, making it easy to address gaps in the partition walls.

[0035] Furthermore, according to the concrete slab 1 using the deck plate 10 and deck plate structure 100 of this embodiment, the rib portion 20 does not protrude downward in the vertical direction, which prevents the rib portion 20 from interfering with ensuring the interior height, making it easier to ensure the interior height and reducing the overall height of the building.

[0036] Furthermore, in the concrete slab 1 using the deck plate 10 according to this embodiment, the rib portions 20 extending in the second direction Y are embedded inside the concrete C, so that the concrete slab 1 has unidirectional properties in the second direction Y. This allows the rib portions 20 to bear loads. Therefore, the deck plate 10 can be used not only as a formwork material but also as a structural material.

[0037] Furthermore, as described above, the deck plate 10 can be used as a formwork material. When the deck plate 10 is used as a formwork material, the concrete slab is treated as a reinforced concrete structure. Therefore, compared to when the deck plate is used as a structural material, there are fewer restrictions on the design conditions of the concrete slab, such as the structural design specifications for the composite deck slab and the fire-resistance certification specifications for the composite deck slab. Therefore, the deck plate 10 can achieve high design convenience.

[0038] Furthermore, because the deck plate 10 is not a structure that includes the spacers 110 and the main reinforcement bars 111, nor is it a so-called reinforced deck plate to which reinforcing bars such as the reinforcing bars 120 are pre-attached, once the deck plate 10 is laid on the framework at the construction site, it is possible to prevent difficulty in walking on the deck plate 10 and prevent the cords of work equipment from getting tangled in the main reinforcement bars. In this way, the deck plate 10 also contributes to good workability at construction sites.

[0039] Furthermore, with the deck plate 10, through holes 25 are formed in the joints 23 of the ribs 21. By inserting spacers 110 through the through holes 25, it is possible to place and support reinforcing bars as structural materials in the area occupied by the rib portion 20 in the third direction Z (i.e., the area close to the flat plate portion 11). Therefore, with the deck plate 10, in addition to the reinforcing bars 120 located above the rib portion 20, it is also possible to place multiple main reinforcements 111 supported by spacers 110 below the rib portion 20. Therefore, with the deck plate structure 100 according to this embodiment, three structural materials (the rib portion 20, a structure including the spacers 110 and the main reinforcements 111, and the reinforcing bars 120) can be placed within the concrete C, making it possible to construct a concrete slab that is more resistant to loads.

[0040] Furthermore, according to the deck plate 10, through holes 25 are formed in the joints 23 of the ribs 21. By inserting a spacer 110 into each of the through holes 25 of adjacent ribs 21, the spacer 110 can be supported by the joints 23 of the ribs 21, allowing the main reinforcement bars 111 to be held accurately on the deck plate 10. Typically, spacers for holding the main reinforcement bars 111 on the deck plate only function to support the main reinforcement bars 111, assuming that the main reinforcement bars 111 are paired with the distribution bars (not shown) that connect with them to form a stable mesh. Therefore, when there are no distribution bars (not shown) that connect with the main reinforcement bars 111, as in this configuration, the spacer lacks stability, significantly reducing workability. In contrast, according to this embodiment, the spacer 110 is supported by the joints 23, allowing the main reinforcement bars 111 to be supported stably and accurately.

[0041] Furthermore, according to the deck plate 10, a through hole 25 is formed in the plate joint 23 of the rib 21, so that the piping 101 can be passed through a position close to the flat plate portion 11, thereby preventing the path of the piping 101 from becoming complicated, etc.

[0042] Furthermore, according to the deck plate 10, because through holes 25 are formed in the plate joints 23 of the ribs 21, when concrete C is poured onto the upper surface 11B of the flat plate portion 11 of the deck plate 10, the concrete C flows into the through holes 25. Therefore, by using the deck plate 10, the concrete C and the deck plate are more integrated, improving the fire resistance and structural performance of the concrete slab, as well as the livability of buildings that use the concrete slab.

[0043] Furthermore, according to the deck plate 10, the through holes 25 are formed in the plate joints 23 of the ribs 21, which reduces the weight of the deck plate 10. As a result, it is possible to reduce the cost of the building.

[0044] Furthermore, in this embodiment, the through holes 25 have a shape (for example, an ellipse, a rectangle, or a diamond shape) that has a long axis La and a short axis Sa that is slightly longer than the diameter of the reinforcing bars 112. With this configuration, the spacers 110 inserted into the through holes 25 are prevented from rattling in the third direction Z, and there is sufficient room for the spacers 110 inserted into the through holes 25 to move in the second direction Y, making it easy to insert (bridge) the spacers 110 across multiple through holes 25.

[0045] Although the present invention has been described above using the above-mentioned embodiment as an example, the present invention is not limited to this.

[0046] For example, in the above-described embodiment, the reinforcing bars 120 are spaced apart from the upper surfaces 24A of the flange portions 24 of the ribs 21. However, this is not limiting. As described above, the flange portions 24 of the ribs 21 of the deck plate 10 have flat upper surfaces 24A. Therefore, when constructing a deck plate structure, workers can hold the reinforcing bars 120 on the deck plate 10 without using spacers by placing the distribution reinforcement bars 122 of the reinforcing bars 120 on the upper surfaces 24A of the ribs 21. That is, as shown in FIG. 4 , workers can easily construct a deck plate structure 100A in which the distribution reinforcement bars 122 abut against one surface (upper surface 24A) of the rib 21 in the third direction Z. Then, as shown in FIG. 4 , a concrete slab 1 may be constructed by pouring concrete C onto the upper surface 11B of the flat plate portion 11 of this deck plate structure 100A.

[0047] In the above embodiment, an example of the deck plate structure 100 including a structure including spacers 110 and main reinforcement bars 111, and reinforcing bars 120, has been described. However, as described above, the rib portion 20 of the deck plate 10 itself functions as a structural member. Therefore, the deck plate structure does not necessarily have to include at least one of the structure and the reinforcing bars 120. That is, a deck plate structure may be constructed that includes the deck plate 10, the structures 110, 111, and the piping 101. Furthermore, the deck plate structure does not necessarily have to include the piping 101. In this manner, the joint portion 23 of the deck plate 10 is formed with a through-hole 25 through which the spacer 110 embedded in the concrete C can be inserted.

[0048] In the above embodiment, the through hole 25 is elliptical. However, as described above, the through hole can have a different shape as appropriate. For example, the through hole 25 may be circular as shown in FIG. 5 . Furthermore, as shown in FIG. 5 , the circular through hole 25A may have an area slightly larger than the area of ​​a cross section perpendicular to the longitudinal direction of the pipe 101. Here, "slightly larger" means that there is a clearance between the object and the through hole 25A that allows the object to be inserted through the through hole 25A, but when the object is visually observed inserted through the through hole 25A, it can be recognized as fitting into the through hole 25A. The area of ​​the circular through hole 25A may be, for example, 105% to 120% or 102% to 110% of the area of ​​the cross section perpendicular to the longitudinal direction of the pipe 101. The circular through-hole 25A has an area slightly larger than the area of ​​the cross section perpendicular to the longitudinal direction of the piping 101, which eliminates the need to provide a separate member to support the piping 101. For example, the deck plate structure in the example of Figure 5 does not have the above-mentioned structures 110, 111 or reinforcing bars 120, and the only member buried in the concrete C (i.e., the member inserted into the through-hole 25A) is the piping.

[0049] Furthermore, the circular through-hole 25A may have an area slightly larger than the area of ​​a cross section perpendicular to the longitudinal direction of the spacer 110. In this case, the area of ​​the circular through-hole 25A may be, for example, 105% to 120% or 102% to 110% of the area of ​​the cross section perpendicular to the longitudinal direction of the spacer 110.

[0050] In this way, in the deck plate 10, the joint portion 23 of at least one of the plurality of ribs 21 of the rib portion 20 has a through-hole formed therein through which a member to be embedded in the concrete C can be inserted. The member to be embedded in the concrete C is not particularly limited, but may be a long member, such as a spacer 110 or a pipe 101.

[0051] As another modification, a welded wire mesh (not shown) may be embedded in the concrete C above the rib portion 20 to prevent cracking of the concrete C. In this modification, the deck plate structure may further include a welded wire mesh, or the second reinforcing bar may be omitted by using the welded wire mesh instead of the reinforcing bar 120. Also, by inserting reinforcing bars (not shown) through the through holes 25, the slab may be designed as a two-way reinforced concrete slab of equal thickness.

[0052] In addition, those skilled in the art can appropriately modify the deck plate and deck plate structure of the present invention in accordance with conventionally known knowledge. As long as such modifications still comprise the configuration of the present invention, they are of course included in the scope of the present invention.

[0053] 10...deck plate, 11...flat plate portion, 11B...upper surface (surface on one side), 20...rib portion, 21...rib, 25, 25A...through hole, 100, 100A...deck plate structure, 101...piping (component), 110...spacer (component), 122...strength distribution bar, C...concrete, X...first direction, Y...second direction, Z...third direction

Claims

1. A deck plate comprising: a flat plate portion consisting of a single plate-like member extending in a first direction and a second direction intersecting the first direction; and a rib portion in which ribs protrude from the flat plate portion toward one side in a third direction intersecting the flat plate portion and extend in the second direction, the ribs being arranged at intervals in the first direction, wherein the one surface of the flat plate portion in the third direction is a surface on which concrete is poured, the rib includes a plate joint portion where the plate-like member is bent toward the one side in the third direction so that parts of the plate-like members overlap in the first direction, and a through hole is formed in the plate joint portion of at least one of the multiple ribs of the rib portion, allowing a member to be embedded in the concrete to be inserted therethrough.

2. A deck plate as described in claim 1, wherein a plurality of through holes are formed in the joint along the second direction at intervals of 50 to 1000 mm.

3. The deck plate according to claim 1, wherein the through hole has a shape in which the second direction is the major axis direction and the third direction is the minor axis direction.

4. The deck plate according to claim 1, wherein the through hole has an area slightly larger than the area of ​​a cross section perpendicular to the longitudinal direction of the member.

5. A deck plate structure comprising the deck plate according to any one of claims 1 to 4 and the member inserted into the through hole.

6. The deck plate structure according to claim 5, further comprising a distribution reinforcement on said one side of said member in said third direction.

7. A deck plate structure as described in claim 6, wherein the distribution reinforcement abuts against the surface of the rib on one side in the third direction.

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