Floorboard

Abstract

To disclose an example of a floorboard capable of shortening a construction period.SOLUTION: A floorboard 10 is made of fiber-reinforced plastic. This reduces a mass of the floorboard 10 to improve installation workability. Consequently, a construction period for installing the floorboard 10 may be shorter. A thickness direction dimension H1 of a main body part 13 is larger than a thickness direction dimension H2 of a first supported part 11 and a second supported part 12. Thereby, a lower surface 10B of the main body part 13 can be reliably brought into contact with an embankment 4. Therefore, in the floorboard 10, a self-weight of the floorboard 10 and a vertical load acting on the floorboard 10 can be received not only by the first supported part 11 and the second supported part 12 but also by the main body part 13.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a floor slab arranged to bridge between two receiving girders.

Background Art

[0002] For example, as the structure of a platform in a railway station building, in the invention described in Patent Document 1, it is constituted by a floor slab spanned between two support parts.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, since a floor slab made of a high-strength concrete material such as Ductal (registered trademark) has a large mass, equipment such as a crane is required to move the floor slab. For this reason, the construction of a platform using a floor slab made of Ductal (registered trademark) increases the man-hours. The present disclosure discloses an example of a floor slab in view of this point.

Means for Solving the Problems

[0005] A floor slab (10) arranged to bridge between a first receiving girder (1A) and a second receiving girder (1B) arranged at a position separated from the first receiving girder (1A) preferably includes at least one of the following constituent elements, for example.

[0006] That is, the said constituent elements are: a first supported part (11) supported by the first receiving girder (1A), where the first supported part (11) is made of fiber-reinforced plastic; a second supported part (12) supported by the second receiving girder (1B), where the second supported part (12) is made of fiber-reinforced plastic; and a main body part (13) that connects the first supported part (11) and the second supported part (12) and is an integral part with the first supported part (11) and the second supported part (12), where the main body part (13) is made of fiber-reinforced plastic.

[0007] And, the dimension (H1) of the main body part (13) in the thickness direction is larger than the dimension (H2) of the first supported part (11) and the second supported part (12) in the thickness direction, and it is desirable that the upper surface (13A) of the main body part (13), the upper surface (11A) of the first supported part (11), and the upper surface (12A) of the second supported part (12) are substantially flush.

[0008] Note that the thickness direction is the direction orthogonal to the longitudinal direction, and in the state where the first supported part (11) is supported by the first receiving girder (1A) and the second supported part (12) is supported by the second receiving girder (1B), it is the direction that coincides with the vertical direction. The longitudinal direction is the direction parallel to the direction from the first supported part (11) to the second supported part (12).

[0009] And, since the said floorboard is made of fiber-reinforced plastic, compared with a floorboard made of Ductal (registered trademark), the mass becomes smaller. Therefore, the installation workability is improved, and it may be possible to reduce the man-hours for installing the floorboard.

[0010] Also, since the dimension (H1) of the main body part (13) in the thickness direction is larger than the dimension (H2) of the first supported part (11) and the second supported part (12) in the thickness direction, for example, the lower surface of the main body part (13) can be brought into contact with an embankment or the like.

[0011] Therefore, in the said floorboard, it becomes possible to receive the self-weight of the floorboard and the vertical load acting on the floorboard not only by the first supported part (11) and the second supported part (12) but also by the main body part (13).

[0012] That is, in the floor board, it is suppressed that the vertical load acting on the floor board acts intensively only on the first supported portion (11) and the second supported portion (12). Consequently, the maximum stress generated in the floor board can be reduced, and it becomes possible to promote the weight reduction of the floor board.

[0013] By the way, when a vertical load acts on the floor board, usually, the largest bending moment is generated at the central portion in the longitudinal direction of the floor board, and the bending moments at one end and the other end in the longitudinal direction of the floor board become smaller.

[0014] On the other hand, in the floor board, since the dimension (H1) in the thickness direction of the main body portion (13) is larger than the dimension (H2) in the thickness direction of the first supported portion (11) and the second supported portion (12), the bending rigidity of the main body portion (13) becomes larger than the bending rigidities of the first supported portion (11) and the second supported portion (12). Therefore, it becomes possible to effectively obtain the required strength.

[0015] Incidentally, the reference numerals in the above parentheses are examples showing the correspondence with the specific configurations and the like described in the embodiments to be described later, and the present disclosure is not limited to the specific configurations and the like indicated by the reference numerals in the above parentheses.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0017] The following "Embodiments of the Invention" show an example of embodiments belonging to the technical scope of the present disclosure. That is, the invention-specific matters described in the claims are not limited to the specific configurations, structures, etc. shown in the following embodiments.

[0018] Note that the arrows, hatching, etc. indicating directions attached to each figure are described to facilitate understanding of the relationship between each figure and the shape of each member or part. Therefore, the invention disclosed in the present disclosure is not limited to the directions attached to each figure.

[0019] At least the members or parts described with reference numerals are provided with at least one, unless otherwise stated such as "one". And the floorboard shown in this embodiment includes at least one of the components such as the members or parts described with reference numerals and the structural parts shown in the drawings.

[0020] (First Embodiment) <1. Overview of the Floorboard> In this embodiment, an example of the floorboard according to the present disclosure is applied to a railway platform. Specifically, as shown in FIG. 1, the floorboard 10 according to this embodiment is mainly used as the floorboard of the part where the platform movable fence 2 of the platform 1 is installed.

[0021] That is, as shown in FIG. 2, the floorboard 10 is a member arranged to bridge the first receiving girder 1A and the second receiving girder 1B. The second receiving girder 1B is arranged at a position horizontally separated from the first receiving girder 1A.

[0022] The first receiving girder 1A and the second receiving girder 1B are made of steel materials such as I-beams, and are supported by steel pipe piles 3 (see Fig. 1). Embankment 4 is provided below the floor slab 10, the first receiving girder 1A, and the second receiving girder 1B. A wall (not shown) for preventing the collapse of the embankment 4 is provided on the track side of the embankment 4.

[0023] <2. Structure of the floor slab> <2.1 Outline of the floor slab> As shown in Fig. 3, the floor slab 10 according to the present embodiment includes at least a first supported portion 11, a second supported portion 12, and a main body portion 13. As shown in Fig. 2, the first supported portion 11 is a portion supported by the first receiving girder 1A.

[0024] The second supported portion 12 is a portion supported by the second receiving girder 1B. The main body portion 13 is a portion connecting the first supported portion 11 and the second supported portion 12. That is, the first supported portion 11 is provided at one end side in the longitudinal direction of the main body portion 13. The second supported portion 12 is provided at the other end side in the longitudinal direction of the main body portion 13.

[0025] Note that the longitudinal direction refers to a direction parallel to the direction from the first supported portion 11 to the second supported portion 12. Hereinafter, in the direction orthogonal to the longitudinal direction, in the state where the first supported portion 11 is supported by the first receiving girder 1A and the second supported portion 12 is supported by the second receiving girder 1B, the direction coinciding with the vertical direction is defined as the thickness direction.

[0026] The dimension H1 of the main body portion 13 in the thickness direction is larger than the dimension H2 of the first supported portion 11 and the second supported portion 12 in the thickness direction, and the upper surface 13A of the main body portion 13, the upper surface 11A of the first supported portion 11, and the upper surface 12A of the second supported portion 12 are substantially flush.

[0027] Note that "the upper surfaces 13A, 11A, and 12A are substantially flush" means that when the home movable fence 2 is installed at any part of the upper surfaces 13A, 11A, and 12A, a flatness is ensured such that the installation is not hindered. Hereinafter, the upper surface 13A of the main body portion 13, the upper surface 11A of the first supported portion 11, and the upper surface 12A of the second supported portion 12 are collectively referred to as the upper surface 10A of the floor plate 10.

[0028] Therefore, even when there are irregularities on the upper surfaces 13A, 11A, and 12A to such an extent that the installation of the home movable fence 2 is not hindered, it corresponds to "the upper surfaces 13A, 11A, and 12A are substantially flush".

[0029] As shown in FIG. 3, inside the main body portion 13, a space Sp is provided where at least a cable (not shown) can be routed. And inside the space Sp, a first partition wall 13B and a second partition wall 13C are provided to partition the space Sp into a plurality of spaces.

[0030] Note that the cable is, for example, an electrical cable such as a power cable for supplying power to the home movable fence 2 and a signal cable for transmitting and receiving an electrical signal for controlling the operation of the home movable fence 2.

[0031] The first partition wall 13B extends in the longitudinal direction inside the space Sp and divides the space Sp in the width direction. The width direction refers to the direction orthogonal to the longitudinal direction and the thickness direction. The second partition wall 13C extends in the width direction and divides the space Sp in the longitudinal direction.

[0032] Note that in this embodiment, a plurality of first partition walls 13B and second partition walls 13C are provided. And the space Sp is in a state of being divided in a grid pattern. That is, the space Sp according to this embodiment is configured as an aggregate of a plurality of spaces 13D (hereinafter, also referred to as cells 13D).

[0033] The plurality of first partition walls 13B and second partition walls 13C are connected to each other and are connected to at least the outer wall of the main body 13. Note that the outer wall of the main body 13 is the upper surface 10A, the lower surface 10B, and the side surfaces 10C and 10D in the width direction of the floor plate 10.

[0034] Therefore, each of the plurality of cells 13D is a hexahedral space formed by any one of the upper surface 10A, the lower surface 10B, the side surfaces 10C and 10D in the width direction of the floor plate 10, the first partition wall 13B, and the second partition wall 13C.

[0035] The first supported portion 11, the second supported portion 12, and the main body 13 including the plurality of first partition walls 13B and second partition walls 13C are configured as an integral part integrally formed of carbon fiber reinforced plastic.

[0036] A large number of carbon fibers extending in the longitudinal direction and a large number of carbon fibers extending in the width direction are embedded in the upper surface 10A and the lower surface 10B of the floor plate 10. A large number of carbon fibers extending in the longitudinal direction and a large number of carbon fibers extending in the thickness direction are embedded in the side surfaces 10C and 10D in the width direction.

[0037] That is, at least the outer wall of the floor plate 10 is made of a resin reinforced with carbon fibers extending in the longitudinal direction and carbon fibers extending in a direction perpendicular to the longitudinal direction. Note that the plurality of first partition walls 13B and second partition walls 13C are also made of carbon fiber reinforced plastic, similar to the outer wall.

[0038] In the present embodiment, as shown in FIG. 4, a reinforcing sheet portion 14 is provided at a portion where the side surfaces at one end and the other end in the width direction of the first supported portion 11 and the second supported portion 12 are continuous with the main body 13, that is, at a portion R where the dimension in the thickness direction changes greatly.

[0039] The reinforcing sheet portion 14 is a portion where the fibers in the carbon fiber reinforced plastic extend in a direction intersecting the longitudinal direction and the thickness direction (in this embodiment, a direction inclined at 45°). Further, the portion R where the dimension in the thickness direction changes is configured in a curved surface shape to relieve stress concentration.

[0040] <Details of the main body part 2.2> As shown in FIGS. 3 and 7, communication holes 15A and 15B are provided in each of the plurality of first partition walls 13B and second partition walls 13C. The communication hole 15A provided in the first partition wall 13B communicates between the cells 13D adjacent to each other in the width direction.

[0041] The communication hole 15B provided in the second partition wall 13C communicates between the cells 13D adjacent to each other in the longitudinal direction. Thereby, each cell 13D constitutes a space Sp connected by the communication holes 15A and 15B.

[0042] At least one communication hole 15C is provided in the width direction side surfaces 10C and 10D. The communication hole 15C is a communication hole that penetrates in the width direction and communicates the space Sp with the outside. In this embodiment, a communication hole 15C is provided for each cell 13D.

[0043] As shown in FIG. 5, communication holes 15D are provided at one end and the other end in the longitudinal direction of the main body part 13. Each of the communication holes 15D communicates the space Sp with the outside. Each communication hole 15D is provided in series along the longitudinal direction together with a plurality of communication holes 15B.

[0044] Therefore, in the main body part 13, a communication path extending from one end to the other end in the longitudinal direction of the main body part 13 is formed. And, as shown in FIG. 6, the outer edges on the lower end side of the communication holes 15B and 15D substantially coincide with the lower surface 10B of the main body part 13.

[0045] As shown in FIGS. 5 and 3, the outer edges on the lower end side of the communication holes 15A and 15C are located above the lower surface 10B of the main body part 13, and the outer edges on the upper end side of the communication holes 15A and 15C are located below the upper surface 13A of the main body part 13.

[0046] That is, at the upper and lower outer edges of the communication holes 15A and 15C, there are wall portions that are part of the first partition wall 13B or the side surfaces 10C and 10D in the width direction. In contrast, there are no wall portions at the lower outer edges of the communication holes 15B and 15D, and there are wall portions at the upper outer edges of the communication holes 15A and 15D (see Fig. 6).

[0047] <2.3 Details of the First Supported Portion and the Second Supported Portion> The first supported portion 11 and the second supported portion 12 have a symmetrical configuration with respect to the center in the longitudinal direction. That is, the first supported portion 11 and the second supported portion 12 have the same configuration.

[0048] And each of the first supported portion 11 and the second supported portion 12 is fixed to the first receiving beam 1A and the second receiving beam 1B respectively by bolts (not shown). Therefore, as shown in Fig. 7, bolt holes 16 are provided in each of the first supported portion 11 and the second supported portion 12.

[0049] That is, a space 17 is provided inside the first supported portion 11 and the second supported portion 12. For example, the space 17 of the first supported portion 11 is a space partitioned by the upper surface, the lower surface, the two side surfaces in the width direction, and the boundary wall 18 of the first supported portion 11.

[0050] Note that the boundary wall 18 is a wall-like member that partitions the space 17 and the space Sp. The boundary wall 18 constitutes the longitudinal end wall surface of the main body portion 13, that is, the wall portion where the communication hole 15D is provided. And each boundary wall 18 is connected to the upper surface 10A, the lower surface 10B, and the side surfaces 10C and 10D in the width direction of the floor plate 10, and is an integral part with the main body portion 13.

[0051] A reinforcing portion 19 is provided around the bolt hole 16 provided in the first supported portion 11. The reinforcing portion 19 is a cylindrical portion that surrounds the bolt hole 16 and is a portion that connects the upper surface 11A and the lower surface 11B of the first supported portion 11.

[0052] Around the bolt hole 16 provided in the second supported portion 12, a similar reinforcing portion is also provided. That is, the reinforcing portion is also a wall-shaped portion that connects the upper surface 12A and the lower surface of the second supported portion 12 so as to surround the bolt hole 16.

[0053] In this embodiment, as shown in FIG. 7, two bolt holes 16 are provided in each of the first supported portion 11 and the second supported portion 12. Therefore, two reinforcing portions 19 are provided in each of the first supported portion 11 and the second supported portion 12.

[0054] Each of the two reinforcing portions 19 is connected to the partition wall 18A by the reinforcing walls 20A1 and 20A2, and each of the two reinforcing portions 19 is connected to the side walls 11C and 11D by the reinforcing walls 20B and 20C.

[0055] The partition wall 18A is a member that partitions the space 17 and is connected to the upper surface, the lower surface, and the boundary wall 18 of the first supported portion 11. The partition wall 18A, the reinforcing portion 19, and the reinforcing walls 20A1, 20A2, 20B, and 20C are also integrally formed with the first supported portion 11 and the second supported portion 12 by carbon fiber reinforced plastic as an integral part.

[0056] <2.4 Other configurations> Concave cutout portions 10E are provided at one end and the other end in the width direction of the upper surface 10A of the floor board 10, as shown in FIG. 3. The cutout portion 10E is a portion for an operator to grip the floor board 10 during construction.

[0057] Ribs 10F or markers (not shown) indicating the position of the second partition wall 13C in the space Sp are provided on the side surfaces 10C and 10D in the width direction of the floor board 10. The communication hole 15C is also a hole for laying cables. Incidentally, the communication hole 15C through which no cable is laid may be closed by a lid (not shown).

[0058] <2.5 Method of fixing the floor board, etc.> First, the operator fills the embankment 4 such that the upper surface position of the embankment 4 is higher than the upper surface position of the embankment 4 after construction is completed. Next, while pressing the lower surface of the floor board 10, that is, the lower surface 10B of the main body portion 13, against the upper surface of the embankment 4, the operator fastens the above bolts to the first receiving girder 1A and the second receiving girder 1B.

[0059] As a result, after construction is completed, the lower surface of the floor board 10, that is, the lower surface 10B of the main body portion 13, is in a state of being reliably in pressure contact with the embankment 4. Note that "pressure contact" means that two members are in contact with each other in a state where the contact surface pressure is equal to or greater than a predetermined pressure.

[0060] In addition, it is desirable that the partition walls 13B and 13C and the side surfaces 10C and 10D in the width direction are located at positions capable of directly receiving the load acting on a base plate (not shown) on which the home movable fence 2 is placed.

[0061] Specifically, after the installation work of the home movable fence 2 is completed, it is desirable that the partition walls 13B and 13C and the side surfaces 10C and 10D projected onto a virtual horizontal plane are located within the base plate projected onto the horizontal plane.

[0062] Incidentally, in the present embodiment, a plate material of 33 cm × 33 cm is used as the base plate, the longitudinal dimension of the cell 13D is 30 cm, and the widthwise dimension of the cell 13D is 25 cm.

[0063] <3. Features of the floor board according to the present embodiment> Since the floor board 10 according to the present embodiment is made of fiber-reinforced plastic, its mass is smaller than that of a floor board made of Ductal (registered trademark). Therefore, the installation workability is improved, and it may be possible to reduce the man-hours required for installing the floor board 10.

[0064] Since the thickness direction dimension H1 of the main body portion 13 is larger than the thickness direction dimension H2 of the first supported portion 11 and the second supported portion 12, the lower surface 10B of the main body portion 13 can be reliably brought into contact with the embankment 4.

[0065] Therefore, in the floor board 10, in addition to applying the self-weight of the floor board 10 and the vertical load acting on the floor board 10 to the first supported portion 11 and the second supported portion 12, the main body portion 13 can also receive them.

[0066] That is, in the floor board 10, it is possible to suppress the vertical load acting on the floor board 10 from acting intensively only on the first supported portion 11 and the second supported portion 12. Consequently, the maximum stress generated in the floor board 10 can be reduced, and it may be possible to promote the weight reduction of the floor board 10.

[0067] By the way, when a vertical load acts on the floor board 10, usually, the largest bending moment is generated at the central portion in the longitudinal direction of the floor board 10, and the bending moments at one end and the other end in the longitudinal direction of the floor board 10 become smaller.

[0068] On the other hand, in the floor board 10, since the thickness direction dimension H1 of the main body portion 13 is larger than the thickness direction dimension H2 of the first supported portion 11 and the second supported portion 12, the bending rigidity of the main body portion 13 becomes larger than the bending rigidity of the first supported portion 11 and the second supported portion 12. Therefore, it may be possible to effectively obtain the required strength.

[0069] By the way, for example, when a person leans on the home movable fence 2 and a horizontal force acts on the home movable fence 2, a bending moment that twists the floor board 10 around the longitudinal direction of the floor board 10 is generated.

[0070] On the other hand, in the present embodiment, partition walls 13B and 13C that partition the space Sp are provided in the space Sp, and the partition walls 13B and 13C are connected to at least the upper surface and the lower surface of the main body portion 13. Thereby, in the floor board 10, the upper surface 10A, the lower surface 10B, and the second partition wall 13C can be integrated to resist the bending moment.

[0071] A space Sp where a cable can be routed is provided inside the main body portion 13, and communication holes 15D are provided at one end and the other end in the longitudinal direction of the main body portion 13. As a result, the main body portion 13 can be utilized as a routing space for the cable.

[0072] And communication holes 15C are provided on the side surfaces 10C, 10D in the width direction, and a communication hole 15A is provided in the first partition wall 10B. As a result, work can be performed from the outside in the width direction of the floor board 10 when routing the cable. That is, during the cable routing construction, the operator can bend the cable in the width direction for routing or take the cable out.

[0073] The outer edges on the lower end side of the communication holes 15D provided at one end and the other end in the longitudinal direction of the main body portion 13, and the outer edges on the lower end side of the communication holes 15B provided in the second partition wall 13C substantially coincide with the lower surface 10B of the main body portion 13.

[0074] As a result, even if water enters the space Sp, the entered water can be discharged to the outside of the space Sp, that is, to the outside of the floor board 10. That is, if the outer edge on the lower end side of the communication hole 15D is located above the lower surface 10B of the main body portion 13, a wall-like portion exists on the lower side of the outer edge on the lower end side of the communication hole 15D. Therefore, with this configuration, the water that has entered the space Sp in the floor board 10 cannot be drained.

[0075] In the space Sp, a first partition wall 13B and a second partition wall 13C are provided, and these first partition wall 13B and second partition wall 13C are connected to the upper surface 13A and the lower surface 10B of the main body portion 13. As a result, the bending rigidity of the floor board 10 is improved without a large increase in the mass of the floor board 10.

[0076] Communication holes 15A, 15B for communicating between adjacent cells 13D are provided in each of the plurality of first partition walls 13B and second partition walls 13C. As a result, the adjacent cells 13D are connected, so that the cable can be reliably routed inside the floor board 10.

[0077] On the upper and lower outer edges of the communication holes 15A and 15C, there are wall portions that are part of the first partition wall 13B or the side surfaces 10C and 10D in the width direction. As a result, while ensuring a configuration in which adjacent cells 13D are connected and each cell 13D communicates outside the floorboard 10, it is possible to suppress an excessive decrease in the bending rigidity of the floorboard 10 due to the communication holes 15C and 15B.

[0078] Around the bolt holes 16 of the first supported portion 11, a cylindrical reinforcing portion 19 surrounding the bolt holes 16 is provided, and the reinforcing portion 19 connects the upper surface and the lower surface of the first supported portion 11. Similarly, around the bolt holes 16 of the second supported portion 12, a reinforcing portion having the same configuration as the reinforcing portion 19 is provided.

[0079] As a result, even when a horizontal load acts in addition to a vertical load acting on the first supported portion 11 and the second supported portion 12, it is possible to suppress the first supported portion 11 and the second supported portion 12 from being greatly deformed.

[0080] A reinforcing sheet portion 14 is provided at a portion of the first supported portion 11 and the second supported portion 12 that is continuous with the main body portion 13. And the reinforcing sheet portion 14 is a portion where the fibers in the fiber-reinforced plastic extend in a direction intersecting the longitudinal direction and the thickness direction.

[0081] As a result, in the above-mentioned portion, the tensile strength in the direction intersecting the longitudinal direction and the thickness direction is also improved, so even when stress concentrates at the boundary portion between the first supported portion 11 and the second supported portion 12 and the main body portion 13, it is possible to effectively counter the stress concentration.

[0082] Note that the portions of the first supported portion 11 and the second supported portion 12 that are continuous with the main body portion 13 are portions corresponding to the boundary portion between the first supported portion 11 and the main body portion 13 and the boundary portion between the second supported portion 12 and the main body portion 13 among the wall portions having a wall surface orthogonal to the width direction and extending in the longitudinal direction.

[0083] In this embodiment, the first partition wall 13B, the width-direction side walls 10C and 10D, and the partition wall 18A correspond to wall portions that have wall surfaces orthogonal to the width direction and extend in the longitudinal direction, and the periphery of the boundary wall 18 among these wall portions corresponds to the above-described boundary portion.

[0084] Furthermore, notch portions 10E for an operator to grip the floor board 10 during construction are provided at one end and the other end in the width direction of the upper surface 10A of the floor board 10. Thereby, when the operator grips the notch portions 10E, it is possible to prevent the fingers from interfering with other floor boards 10 or the like when arranging the floor boards 10 in the width direction. Subsequently, it may be possible to appropriately install the floor board 10 at a predetermined position.

[0085] (Second Embodiment) As shown in FIG. 8, the floor board 10 according to this embodiment is provided with wall portions 18B that are continuous with the boundary wall 18 on the width-direction side walls 10C and 10D. In this embodiment, a reinforcing sheet portion 14 is also provided at a position connecting the first partition wall 13B and the partition wall 18A.

[0086] Note that also in this embodiment, the reinforcing fibers embedded on one side across the wall portion 18B and the reinforcing fibers embedded on the other side are connected without being interrupted by the wall portion 18B. Similarly, the reinforcing fibers embedded on one side across the boundary wall 18 and the reinforcing fibers embedded on the other side are connected without being interrupted by the boundary wall 18.

[0087] (Other Embodiments) The plurality of first partition walls 13B and second partition walls 13C according to the above-described embodiment were configured to divide the space Sp into a lattice shape. However, the present disclosure is not limited to this. That is, the present disclosure may be configured such that, for example, the space Sp is divided into a honeycomb shape by partition walls.

[0088] In the above-described embodiment, it was assumed that cables were routed in the space Sp. However, the present disclosure is not limited to this. That is, the present disclosure may be configured such that, for example, members other than cables are arranged in the space Sp.

[0089] In the above-described embodiment, an example was assumed in which the lower surface 10B of the main body portion 13 was installed in contact with the embankment 4. However, the present disclosure is not limited thereto. That is, the present disclosure is applicable to, for example, a structure in which the floor board 10 is supported only by the first receiving girders 1A and the second receiving girders 1B.

[0090] In the above-described embodiment, the outer edges on the lower end sides of the communication holes 15B and 15D substantially coincided with the lower surface 10B of the main body portion 13. However, the present disclosure is not limited thereto. That is, the present disclosure may be, for example, a configuration in which a wall-like portion exists below the outer edges on the lower end sides of the communication holes 15B and 15D.

[0091] In the above-described embodiment, the first partition wall 13B or a wall portion that is a part of the side surfaces 10C and 10D in the width direction existed at the upper and lower outer edges of the communication holes 15A and 15C. However, the present disclosure is not limited thereto. That is, the present disclosure may be, for example, a configuration in which the wall portion does not exist.

[0092] In the above-described embodiment, communication holes 15A and 15B for communicating between adjacent cells 13D were provided in each of the plurality of first partition walls 13B and second partition walls 13C. However, the present disclosure is not limited thereto. That is, the present disclosure may be, for example, a configuration in which the communication holes 15A and 15B are abolished.

[0093] In the above-described embodiment, the reinforcing portion 19 was provided around the bolt hole 16. However, the present disclosure is not limited thereto. That is, the present disclosure may be, for example, a configuration in which the reinforcing portion 19 is abolished.

[0094] In the above-described embodiment, the reinforcing sheet portion 14 was provided at least on the width-direction side surfaces 10C and 10D. However, the present disclosure is not limited to this. That is, the present disclosure may be, for example, a configuration in which the reinforcing sheet portion 14 is abolished, a configuration in which the reinforcing sheet portion 14 is provided only at a position connecting the first partition wall 13B and the partition wall 18A, or a configuration in which the reinforcing sheet portion 14 is provided at the position and the width-direction side surfaces 10C and 10D.

[0095] In the above-described embodiment, the outer wall of the floor board 10 was reinforced with carbon fibers extending in the longitudinal direction and carbon fibers extending in a direction perpendicular to the longitudinal direction. However, the present disclosure is not limited to this. That is, the present disclosure may be, for example, a resin reinforced with glass fibers or a resin reinforced with fibers extending in a direction intersecting the longitudinal direction and the thickness direction.

[0096] The floor board 10 according to the above-described embodiment was long. However, the present disclosure is not limited to this. That is, the present disclosure may be, for example, a floor board having the same longitudinal dimension and width dimension, or a floor board having a width dimension larger than the longitudinal dimension. The longitudinal direction and the width direction are as described above.

[0097] The present disclosure only needs to conform to the gist of the disclosure described in the above-described embodiment and is not limited to the above-described embodiment. Therefore, a configuration in which at least two of the above-described plurality of embodiments are combined, or a configuration in which any of the configuration elements illustrated or described with reference numerals in the above-described embodiment is abolished may be used.

[0098] Furthermore, the floor slab according to the above-described embodiment was an example applied to a platform. However, the present disclosure is not limited to this. That is, the present disclosure is applicable to, for example, the floor board of a building.

Explanation of reference numerals

[0099] 1… Platform 1A… First receiving girder 1B… Second receiving girder 2… Home movable fence 3… Steel pipe pile 3C… First partition wall 4… Earth filling 10… Bed board 11… First supported part 12… Second supported part 13… Main body part 13B… First partition wall 13C… Second partition wall 14… Reinforcing sheet part 15A~15D… Communication holes 16… Bolt holes 18… Boundary wall 19… Reinforcing part 20A~20C… Reinforcing walls

Claims

1. In a floor board arranged to bridge a first receiving beam and a second receiving beam arranged at a position spaced apart from the first receiving beam, a first supported portion supported by the first receiving beam, the first supported portion being made of fiber reinforced plastic, a second supported portion supported by the second receiving beam, the second supported portion being made of fiber reinforced plastic, a main body portion that connects the first supported portion and the second supported portion and is an integral part with the first supported portion and the second supported portion, the main body portion being formed of fiber reinforced plastic, and when a direction parallel to the direction from the first supported portion toward the second supported portion is defined as the longitudinal direction, and a direction orthogonal to the longitudinal direction and coinciding with the vertical direction in a state where the first supported portion is supported by the first receiving beam and the second supported portion is supported by the second receiving beam is defined as the thickness direction, a floor board in which a dimension of the main body portion in the thickness direction is larger than dimensions of the first supported portion and the second supported portion in the thickness direction, and upper surfaces of the main body portion, the first supported portion, and the second supported portion are substantially flush.

2. A space in which at least a cable can be routed is provided in the main body portion, and further, communication holes for communicating the space with the outside are provided at least at one end and the other end in the longitudinal direction of the main body portion. The floor board according to claim 1.

3. The floor board according to claim 2, wherein an outer edge on the lower end side of the communication hole substantially coincides with the lower surface of the main body portion.

4. In the space, a partition wall for partitioning the space into a plurality of spaces is provided, the partition wall being connected to at least the upper surface and the lower surface of the main body portion, and further, a second communication hole for communicating adjacent spaces partitioned by the partition wall is provided in the partition wall. The floor board according to claim 3.

5. When a direction orthogonal to the longitudinal direction and the thickness direction is defined as the width direction, third communication holes for communicating the space according to claim 2 with the outside are provided at one end side and the other end side in the width direction of the main body portion, the third communication holes penetrating the main body portion in the width direction, and further, an outer edge on the lower end side of the third communication hole is located above the lower surface of the main body portion, and an outer edge on the upper end side of the third communication hole is located below the upper surface of the main body portion. The floor board according to claim 4.

6. The first supported portion is provided with a first bolt hole through which a bolt for fixing the first supported portion to the first receiving beam is inserted therethrough. The second supported portion is provided with a second bolt hole through which a bolt for fixing the second supported portion to the second receiving girder is inserted. A space is provided inside the first supported portion and the second supported portion. Furthermore, around the first bolt hole, a wall-shaped first reinforcing portion that connects the upper surface and the lower surface of the first supported portion so as to surround the first bolt hole is provided, and around the second bolt hole, a wall-shaped second reinforcing portion that connects the upper surface and the lower surface of the second supported portion so as to surround the second bolt hole is provided. The floorboard according to any one of claims 1 to 5. **Claim 7** When the direction orthogonal to the longitudinal direction and the thickness direction is defined as the width direction, it has a wall surface orthogonal to the width direction and includes a wall portion extending in the longitudinal direction. Among the wall portions, at the boundary between the first supported portion and the main body portion and at the boundary between the second supported portion and the main body portion, a reinforcing sheet portion in which fibers in the fiber-reinforced plastic extend in a direction intersecting the longitudinal direction and the thickness direction is provided. The floorboard according to any one of claims 1 to 5.

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