JP5522611B2 - Floor deck with grid structure - Google Patents

Description

  The present invention relates to a floor deck having a grid structure.

  In a waterfront structure (floor structure) with a floor deck overhanging the water surface, such as a water stage, pier, water promenade, etc., the floor deck is viewed from below during natural disasters such as typhoons, storm surges, tsunamis, floods, and flooding. May be damaged by the large water pressure. Moreover, in the floor deck in the conventional waterfront structure, in order to avoid that a big water pressure is applied from the downward direction, it was forced to set the floor surface height to the safer side compared with a plan water level. As a result, there has been a problem that the hydrophilicity of the waterside structure becomes poor.

  Moreover, at the time of a natural disaster as described above, there is a concern that the floor deck may be damaged by receiving water pressure not only from below but also from the side. However, it is difficult to sufficiently ensure the rigidity of the floor deck and the durability against external force simply by keeping the height of the floor deck low.

JP 11-229322 A JP-A-9-165725 Japanese Patent Laid-Open No. 5-141029 Japanese Patent Laid-Open No. 9-165859

  The present invention has been made in view of the above problems, and in a floor deck constructed on the surface of the water, a large external force is applied from below or from the side even during natural disasters such as typhoons, storm surges, tsunamis, floods, and flooding. An object is to provide a technique for ensuring excellent hydrophilicity while suppressing the action.

  The present invention includes a plurality of floor boards, a slit floor in which a gap is formed between adjacent floor boards, a joist member that supports the slit floor and extends in a direction intersecting the floor board, and supports the joist member. And a beam member extending along the longitudinal direction of the floor plate, each floor plate in the slit floor, the joist member and the beam member are assembled in a grid shape, and has a grid structure constructed on the water surface. A grid structure in which at least a floor plate and a joist member or a joist member and a beam member are arranged in the same layer with respect to the height direction of the floor deck, among the floor plate, the joist member and the beam member. Provide a floor deck with.

  According to the floor deck of the above configuration, there is a gap between each floor plate in the slit floor, so that the water rushes from below the floor deck (slit floor) during natural disasters such as typhoons, storm surges, and floods. However, water can escape through the gap above the floor deck (slit floor). Therefore, according to the floor deck in the present invention, the pressure receiving area for receiving the wave pressure (water pressure) from below can be reduced as compared with the conventional floor deck in which the floor board is arranged on the entire floor surface without a gap. Thereby, since the wave pressure (water pressure) acting on the slit floor from below is reduced, it is possible to prevent the slit floor from being damaged even during natural disasters such as typhoons, storm surges, and floods.

  Moreover, according to the floor deck in this invention, since the wave pressure (water pressure) which acts on a slit floor from below is reduced, a slit floor can be constructed in a lower level compared with the past. That is, since the slit floor can be installed at a position closer to the water surface than in the prior art, the hydrophilicity of the floor deck can be enhanced.

  The floor deck according to the present invention includes at least a floor plate and a joist member, or a joist member and a beam member in the slit deck, with respect to the height direction of the floor deck. ), The height of the floor deck can be kept small while suppressing the bending rigidity of the floor deck from being lowered. Thus, by reducing the height of the floor deck, it is possible to reduce the pressure receiving area that receives the wave pressure (water pressure) and wind pressure from the side during natural disasters such as typhoons, storm surges, and floods.

  As described above, the floor deck according to the present invention has a structure that can reduce the wave pressure received from below. As described above, according to the present invention, even during natural disasters such as typhoons, storm surges, tsunamis, floods, and floods, it is possible to avoid receiving large external forces from below or from the side, and it is possible to suppress damage during natural disasters. Can provide a comfortable floor deck.

  In the floor deck according to the present invention, the joist member is inserted into a through-hole formed in the floor plate so that the floor plate and the joist member are arranged in the same layer with respect to the height direction of the floor deck. Also good. In this case, the slit floor has a spacer member having a hollow portion through which the joist member can be inserted, and the spacer member in which the joist member is inserted into the hollow portion is disposed between adjacent floor plates. Also good. By adopting the configuration in which the spacer member is arranged between the adjacent floor plates in this way, it is possible to appropriately secure the gap formed between the adjacent floor plates and easily adjust the gap to a desired dimension. Can do.

  In the floor deck according to the present invention, an end portion of the joist member is supported by a support portion provided in a longitudinal section of the beam member, so that the joist member and the beam member are in the height direction of the floor deck. May be arranged in the same layer. In the case of this configuration, the joist member is further inserted through a through hole formed in the floor board, so that all of the floor board, joist member and beam member in the floor deck are in the same layer with respect to the height direction of the floor deck. Can be arranged.

  In the floor deck according to the present invention, an end portion of the joist member is supported by a support portion provided in a longitudinal section of the beam member, so that the joist member and the beam member are in the height direction of the floor deck. The slit floor is laminated and supported on the joist member and is inserted into a through hole formed in the floor plate, and a hollow into which the rod member can be inserted. The spacer member having a spacer member and having the rod-shaped member inserted through the hollow portion may be disposed between adjacent floor plates.

  The present invention can also be understood as a side surface of a floating jetty. The floating pier according to the present invention is a floating pier including any of the above-described floor decks and a float connected to the lower side of the beam member, and the float has a hollow body inside. The bag body is provided with a vent for introducing and discharging air to and from the hollow portion, and floats on the water surface in a state where the hollow portion is filled with air, and the air in the hollow portion May be configured to settle in water in a state of being discharged from the vent.

  According to the floating pier configured as described above, it is possible to freely switch between floating on the surface of the floating pier and sinking in water according to the state of air filling in the hollow portion of the float. Therefore, when a typhoon or the like is approaching, it is easy to avoid damaging the floating pier by precipitating the floating pier in water.

  As described above, the floor deck according to the present invention adopts a grid structure, and the slit floor adopts a slit structure, so that it is difficult to receive water resistance when the floating pier is submerged in water. it can. Accordingly, the work of settling the floating pier can be performed easily and in a short time, so that workability can be improved.

  In addition, according to the floor deck according to the present invention, since the total dimension in the height direction can be kept low as described above, by constructing a floating jetty using such a floor deck, from the side It is possible to provide a floating pier that is difficult to receive external force. Therefore, when the floating pier is submerged on the seabed, it can be made less susceptible to large waves. In addition, when the floating jetty sinks to the bottom of the river, it can be made less susceptible to the turbulent flow that flows from the upstream when the water increases, and it avoids the collision of driftwood and other obstacles. It becomes easy. As a result, it is possible to provide a floating jetty that is less likely to be damaged during natural disasters such as typhoons and increased water.

  According to the present invention, in a floor deck erected on the surface of the water, it is excellent while suppressing a large external force from the lower side or the side even during natural disasters such as typhoons, storm surges, tsunamis, floods, and flooding. It becomes possible to ensure hydrophilicity.

It is a figure which shows a waterfront structure provided with the floor deck which has a grid structure which concerns on Embodiment 1. FIG. It is a figure which shows schematic structure of the floor deck which concerns on Embodiment 1. FIG. It is an AA arrow line view of FIG. It is a BB arrow sectional view of Drawing 2. It is a figure which shows the cross-section of the floor deck which concerns on Embodiment 2. FIG. It is a figure which shows the waterfront structure which concerns on Embodiment 3. FIG. It is a figure which shows the cross-section of the floor deck which concerns on Embodiment 3. FIG. In the waterfront structure which concerns on Embodiment 3, it is a figure which shows the state at the time of low tide. It is a figure shown about the variation of the example of installation of the people bridge concerning Embodiment 3. FIG. (A) shows the state at high tide, and (b) shows the state at low tide. It is a figure which shows schematic structure of the floating jetty concerning Embodiment 4. FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the invention will be exemplarily described in detail with reference to the drawings.

<Embodiment 1>
FIG. 1 is a view showing a waterfront structure 100 including a floor deck (hereinafter simply referred to as “floor deck”) 1 having a grid structure according to the first embodiment. The waterfront structure 100 in the present embodiment is, for example, a water stage. The floor deck 1 is fastened to a concrete revetment 101 by a fastener 102, and is laid over the water surface. The floor deck 1 is mainly composed of a joist member and a slit floor, in addition to the beam member (large drawing) 2 shown in FIG. In this embodiment, although the beam member 2 is comprised with H-shaped steel, it is not limited to this. The beam member 2 is fastened to the revetment 101 via a fastener 102. As shown in FIG. 1, the floor deck 1 is constructed so as to overhang the water surface WL.

FIG. 2 is a diagram illustrating a schematic configuration of the floor deck 1 according to the first embodiment. FIG. 2 shows a part of the upper surface of the floor deck 1. The floor deck 1 includes a slit floor 3 having a plurality of floor plates 31, a joist member 4 that supports the slit floor 3, and a beam member 2 that supports the joist member 4. The beam member 2 is arranged for every fixed span. In this embodiment, the interval between the beam members 2 is set to about 1800 to 2000 mm. However, the space | interval of the beam members 2 is not limited to the said illustration range, It is a design matter which can be changed suitably. Moreover, in this embodiment, although the beam member 2 is comprised with the H-section steel, various cross-sectional shapes, such as I-section steel, angle steel, and channel steel, are employable.

  The slit floor 3 has a plurality of floor plates 31 and spacer members 32. The floor plate 31 is an elongated plate-like member disposed along the longitudinal direction of the beam member 2. Hereinafter, the longitudinal direction of the floor board 31 is defined as the width direction of the floor deck 1 (slit floor 3). The slit floor 3 is configured in a slit shape by forming a gap 33 between adjacent floor plates 31. The spacer member 32 is a member that is disposed between the adjacent floor boards 31 and defines the interval between the floor boards 31, that is, the size of the gap 33. The dimension of the gap 33 formed between the adjacent floor boards 31 is equal to the length of the spacer member 32.

  The floor board 31 may be made of natural wood, and various materials such as synthetic wood and metal can be used.

  The floor deck 1 includes a joist member 4 that supports the slit floor 3. In the example shown in FIG. 2, the joist member 4 extends in a direction orthogonal to the longitudinal direction of the floor board 31. In the present embodiment, since the longitudinal direction of the floor board 31 coincides with the longitudinal direction of the beam member 2, the longitudinal direction of the joist member 4 is set to a direction orthogonal to the longitudinal directions of both the floor board 31 and the beam member 2. Yes. However, the joist member 4 only needs to extend in a direction intersecting the floor plate 31 so that a grid structure is formed together with the beam member 2 and the floor plate 31, and the joist member 4 and the floor plate 31 are orthogonal to 90 °. It does not have to be arranged. Similarly, the joist member 4 and the beam member 2 do not have to be arranged orthogonal to 90 °.

  In FIG. 2, the joist member 4 is hatched. Hereinafter, the longitudinal direction in which the joist member 4 extends is defined as the longitudinal direction of the floor deck 1 (slit floor 3). The joist member 4 in the present embodiment is a rod-shaped member having a circular cross section. However, the cross-sectional shape of the joist member 4 is not limited to a circular cross-section, and other cross-sectional shapes may be adopted. Moreover, as a material used for the joist member 4, various materials, such as a metal material and a wood type material, can be used.

  FIG. 3 is an AA arrow view of FIG. FIG. 3 shows a state in which the floor board 31 is viewed from the front. 4 is a cross-sectional view taken along the line BB in FIG. Here, the height dimension of the floor board 31 is defined by the symbol h in FIG. 4, and the width dimension of the floor board 31 is defined by the symbol w in FIG. As shown in FIG. 4, the floor plate 31 has a height dimension h larger than the width dimension w. In this embodiment, the width dimension w of the floor board 31 is 30 mm, and the height dimension h is 145 mm. Further, the size (hereinafter also referred to as “slit size”) ws of the gap 33 between the floor plates 11 is set to 30 mm. However, these dimensions are design matters that can be changed as appropriate.

  Each floor plate 31 in the slit floor 3 is formed with a through hole 31A through which the joist member 4 is inserted, and the joist member 4 is inserted into the through hole 31A. In the present embodiment, through-holes 31A are formed at three locations, that is, the central portion in the longitudinal direction of each floor plate 31 and the peripheral portions at both ends. The inner diameter of the through hole 31A is set to be equal to or slightly larger than the outer diameter of the joist member 4. The joist member 4 is inserted into the through hole 31 </ b> A of the floor plate 31, so that the own weight and the loaded load of the floor plate 31 are transmitted to the joist member 4. Thereby, the joist member 4 functions as a support member that supports the slit floor 3 including the floor plate 31. Further, the plurality of floor plates 31 in the slit floor 3 are connected to each other via the joist member 4 and are integrated.

The spacer member 32 is a cylindrical member having an inner diameter slightly larger than the joist member 4, and has a hollow portion 32A inside the cylindrical wall. The length dimension of the spacer member 32 is formed to be equal to the slit dimension ws described above. In this embodiment, the spacer member 32 is
Although it is formed by a round pipe made of aluminum, it is not limited to this.

  The joist member 4 is inserted into the hollow portion 32 </ b> A of the spacer member 32. By arranging the spacer member 32 between the floor boards 31 arranged adjacent to each other, the slit dimension ws of the gap 33 formed between the adjacent floor boards 31 can be adjusted to a desired set dimension.

  Next, details of the beam member 2 will be described. Reference numeral 21 denotes a “web”, reference numeral 22 denotes an “upper flange”, and reference numeral 23 denotes a “lower flange”. The beam member 2 includes a web 21, an upper flange 22, and a lower flange 23. The web 21 of the beam member 2 is provided with a joist receiving member 24 that receives the end of the joist member 4 and supports the joist member 4. As shown in FIG. 4, the joist receiving member 24 is provided in the longitudinal section of the beam member 2. Here, being provided in the longitudinal section of the beam member 2 means being installed in a section orthogonal to the longitudinal direction of the beam member 2.

  The joist receiving member 24 has a support portion having an inner diameter equal to the outer diameter of the joist member 4, and the joist member 4 can be supported by inserting an end portion of the joist member 4 into the support portion. The joist receiving member 24 is integrally fixed to the web 21 by an appropriate joining method such as bolting or welding. The end of the joist member 4 is received and supported by the joist receiving member 24 joined to the web 21, whereby the joist member 4 is fixed to the beam member 2 via the joist receiving member 24. As a result, the weight of the joist member 4 and the slit floor 3 supported by the joist member 4 or the load on the slit floor 3 is transmitted to the beam member 2. In addition, it is good to fix the edge part of the joist member 4 with respect to the joist receiving member 24 by an appropriate means so that the end part of the joist member 4 may not come off carelessly from the joist receiving member 24.

  As described above, the floor deck 1 supports the end of the joist member 4 via the joist receiving member 24 provided in the longitudinal section of the beam member 2, so that the joist member 4 is provided in the longitudinal section of the beam member 2. To fit. As a result, the joist member 4 and the beam member 2 are arranged in the same layer (same layer) in the height direction of the floor deck 1. The joist receiving member 24 corresponds to the support portion according to the present invention. The support structure for supporting the joist member 4 by the beam member 2 is not limited to the above configuration example. For example, after the spacer member 32 is inserted into the ring portion of an eyebolt (not shown), the joist member 4 is supported by the beam member 2 by joining the eyebolt to the lower flange 23 or the upper flange 22 of the beam member 2. Such a structure may be adopted.

  As described above, the floor deck 1 according to the present embodiment has the joist members 4 arranged in the orthogonal direction with respect to the beam members 2 arranged in parallel to each other and the floor plates 31 in the slit floor 3. These members are assembled in a lattice shape. That is, the floor deck 1 has a grid structure in which each floor plate 31, the joist member 4 and the beam member 2 in the slit floor 3 are assembled in a grid shape.

  Since gaps 33 are formed between the floor plates 31 in the slit floor 3, the water rushes from below the floor deck 1 (slit floor 3) in the event of a natural disaster such as a typhoon, storm surge, flood, or flooding. However, water can escape through the gap 33 above the floor deck 1 (slit floor 3). That is, according to the floor deck 1 which concerns on this embodiment, the pressure receiving area which receives the wave pressure (water pressure) from the downward direction can be decreased compared with the conventional floor deck which arrange | positions a floor board on the whole floor surface without gap. . Thereby, since the wave pressure (water pressure) acting on the slit floor 3 from below is reduced, it is possible to prevent the slit floor 3 from being damaged even during natural disasters such as typhoons, storm surges, and floods. Further, as described above, according to the floor deck 1, since the wave pressure (water pressure) acting on the slit floor 3 from below is reduced, the slit floor 3 can be installed at a lower level than in the prior art. That is, since the installation level of the slit floor 3 can be made closer to the water surface than in the prior art, the hydrophilicity of the floor deck 1 can be enhanced.

  Further, the slit floor 3 uses the floor plate 31 as a so-called “vertical use”, and the height dimension h is larger than the width dimension w. According to this, since the bending rigidity of the floor board 31 can be further increased, a load load (for example, a load of a person riding on the upper part of the slit floor 3) acts on the slit floor 3 (floor board 31) from above. Even so, it is advantageous in that the slit floor 3 (floor plate 31) is difficult to bend. However, the slit floor 3 does not necessarily require the floor plate 31 to be used vertically, and the relative relationship between the width dimension w and the height dimension h can be freely set.

  Further, the floor deck 1 according to the embodiment includes at least the floor plate 31 and the joist member 4 or the joist member 4 and the beam member 2 among the floor plate 31, the joist member 4 and the beam member 2 in the slit floor 3. It arrange | positions in the same layer (same layer) regarding the height direction of this. In the floor deck 1 shown in FIGS. 1 to 4, all of the floor plate 31, the joist member 4 and the beam member 2 in the slit floor 3 are arranged in the same layer with respect to the height direction of the floor deck 1.

  That is, the floor deck 1 according to the present embodiment inserts the joist member 4 into the through holes 31A formed in each floor plate 31 of the slit floor 3 so that the floor plate 31 and the joist member 4 are placed at the height of the floor deck 1. It was arranged (contained) on the same layer with respect to the vertical direction. Thereby, compared with the case where the floor board 31 of the slit floor 3 is laminated and supported on the joist member 4, the height dimension of the floor deck 1 is reduced while suppressing the bending rigidity of the floor deck 1 from being lowered. Is possible. At that time, since the spacer member 32 having the hollow portion 32A through which the joist member 4 can be inserted is arranged between the floor plates 31, the joist member 4 is inserted into the through hole 31A formed in the floor plate 31. At this time, the slit dimension ws between the floor plates 31 can be easily adjusted to a desired dimension.

  Furthermore, the floor deck 1 supports the joist member 4 and the beam member 2 in the height direction of the floor deck 1 by supporting the end portion of the joist member 4 by the joist receiving member 24 provided in the longitudinal section of the beam member 2. Was placed (contained) on the same layer. According to this, compared with the case where the joist member 4 is laminated and supported on the beam member 2, it is possible to reduce the height dimension of the floor deck 1 while suppressing the bending rigidity of the floor deck 1 from being lowered. It becomes possible.

  As described above, by reducing the height of the floor deck 1, the pressure-receiving area that receives wave pressure (water pressure) and wind pressure from the side during natural disasters such as typhoons, storm surges, tsunamis, floods, and flooding is reduced. it can. As described above, the floor deck 1 adopting the grid structure has a structure that can reduce the wave pressure received from below, so that it is possible to avoid receiving a large external force from below or from the side even during the natural disaster. Is done. Thereby, it is possible to prevent the floor deck 1 from being damaged even during a natural disaster. In the present embodiment, the case where the waterfront structure 100 including the floor deck 1 is a water stage has been described as an example. However, the waterfront structure 100 may be a pier, a waterside promenade, a floating pier, or the like. The use is not particularly limited as long as it is a waterfront structure (floor structure) having a floor deck to be installed.

  In the floor deck according to the present invention, at least the floor plate and the joist member or the joist member and the beam member of the floor plate and the joist member and the beam member in the slit floor are arranged in the same layer with respect to the height direction of the floor deck. For example, only the joist member and the beam member may be the same layer, or only the slit floor and the joist member may be the same layer. Hereinafter, other embodiments will be described with reference to the drawings.

<Embodiment 2>
FIG. 5 is a diagram illustrating a cross-sectional structure of the floor deck 1A according to the second embodiment. Of the floor deck 1A, the same reference numerals are given to the components common to the floor deck 1 according to the first embodiment, and detailed description thereof is omitted.

  As with the floor deck 1 according to the first embodiment, the floor deck 1A includes a slit floor 3A, a joist member 4A, and a beam member 2 that form a grid structure. The beam member 2 supports the joist member 4A. The joist member 4A has a rectangular cross section and supports the slit floor 3A. As shown in FIG. 5, the end portion 40 of the joist member 4A is placed on the lower flange 23 as a support provided in the longitudinal section of the beam member 2, and the joist member 4A is attached to the beam member 2 by a fastener (not shown). It is supported and fixed to. Thereby, the joist member 4A and the beam member 2 are arranged in the same layer in the height direction of the floor deck 1A.

  On the other hand, as shown in FIG. 5, the slit floor 3 </ b> A is laminated and supported on the joist member 4. The slit floor 3 </ b> A includes a plurality of floor plates 31 having through holes 31 </ b> A and spacer members 32, similar to the slit floor 3 of the first embodiment. In the floor deck 1 of the first embodiment, the joist member 4 is inserted into the through hole 31A of the floor plate 31. However, in the floor deck 1A shown in FIG. 5, the connecting rod 5 as a rod-shaped member is inserted into the through hole 31A. To do. The connecting rod 5 has a circular cross section, and has an outer diameter that is the same as or slightly smaller than the inner diameter of the through hole 31 </ b> A and the hollow portion 32 </ b> A of the spacer member 32. The connecting rod 5 is inserted through the through-hole 31A of each floor plate 31, and the spacer member 32 having the connecting rod 5 inserted through the hollow portion 32A is disposed between the adjacent floor plates 31. And a gap 33 having a predetermined size can be formed between the adjacent floor plates 31.

  The slit floor 3A is fixed to the joist member 4A via an eyebolt 34 that is a fastening member. Specifically, the spacer member 32 is inserted through the ring portion of the eyebolt 34, and the bolt portion of the eyebolt 34 is inserted into a through hole formed so as to penetrate the joist member 4A up and down, and then the eyebolt 34 with a nut. Is fastened to the joist member 4A. Thereby, the slit floor 3A is supported and fixed to the joist member 4A.

  As described above, in the floor deck 1A, among the beam member 2, the joist member 4A, and the slit floor 3A, the joist member 4A and the beam member 2 are arranged in the same layer with respect to the height direction of the floor deck 1A, and the joist member 4A. A structure in which the slit floor 3A is laminated and supported is employed. As a result, similarly to the floor deck 1 according to the first embodiment, even during natural disasters such as typhoons, storm surges, tsunamis, floods, and flooding, it is possible to prevent damage from being caused by large external forces acting from below or from the side. However, it is possible to ensure excellent hydrophilicity.

<Embodiment 3>
FIG. 6 is a diagram illustrating a waterfront structure 100B according to the third embodiment. The waterfront structure 100B is a pedestrian bridge (pier) erected on the water surface. A waterfront structure (hereinafter referred to as “Hitotsu Bridge”) 100B has a floor deck 1B that projects over the water surface. In the floor deck 1B, the same reference numerals are given to the same components as those of the floor decks 1 and 1A according to the first and second embodiments, and detailed description thereof is omitted.

  The floor deck 1B includes a slit floor 3, a joist member 4, and a beam member 2. The slit floor 3 is supported by a joist member 4, and the joist member 4 that supports the slit floor 3 is supported by the beam member 2. The traffic bridge 100B includes a pedestal 103 that supports the beam member 2 and is fixed to an underwater ground. The upper end portion of the leg column 103 is bolted to the lower flange 23 of the beam member 2. Further, the floor deck 1 </ b> B includes a handrail 7. The column 71 of the handrail 7 is, for example, bolted to the upper flange 22 of the beam member 2. However, the joining method of the beam member 2 and the pedestal 103 and the joining method of the beam member 2 and the column 71 can be appropriately changed.

FIG. 7 is a diagram illustrating a cross-sectional structure of a floor deck 1B according to the third embodiment. FIG. 7 shows a cross-sectional structure orthogonal to the longitudinal direction of the beam member 2. Similar to the floor deck 1, the floor deck 1 </ b> B has a grid structure in which each floor plate 31, joist member 4 and beam member 2 in the slit floor 3 are assembled in a grid shape. In the floor deck 1B, the joist member 4 and the slit floor 3 are arranged in the same layer with respect to the height direction of the floor deck 1B, and the joist member 4 and the slit floor 3 assembled in the same layer are laminated on the beam member 2. It has a supported structure.

  The joining method of the joist member 4 and the slit floor 3 is the same as that of the floor deck 1 according to the first embodiment. As shown in FIG. 7, the joist member 4 is inserted into the through hole 31 </ b> A formed in the floor plate 31 and the hollow portion 32 </ b> A of the spacer member 32, and the spacer member 32 is disposed between the adjacent floor plates 31. ing. A support plate 81 and a pedestal 82 are placed on the upper flange 22 of the beam member 2. The upper surface of the pedestal 82 is a concave surface, and the spacer member 32 is placed on the upper portion of the pedestal 62. The spacer member 32 disposed on the pedestal 82 and the joist member 4 inserted through the spacer member 32 are fastened to the upper flange 22 of the beam member 2 via a fastener 80. Thus, the joist member 4 is supported by the beam member 2 via the spacer member 32, the pedestal 82 and the support plate 81. In the example illustrated in FIG. 7, the spacer member 32, the joist member 4, the pedestal 82, and the support plate 81 corresponding to the places where the fasteners 80 are provided have through holes for inserting the bolt portions of the fasteners 80. Is provided. In addition, illustration of the handrail 7 is abbreviate | omitted in FIG.

  In the floor deck 1B having the above configuration, the joist member 4 and the slit floor 3 among the beam member 2, the joist member 4 and the slit floor 3 are arranged in the same layer with respect to the height direction of the floor deck 1B. As with the floor deck according to No. 2, even in natural disasters such as typhoons, storm surges, tsunamis, floods, and floods, it has excellent hydrophilicity while suppressing damage from large external forces acting from below or from the side. It becomes possible to ensure the sex.

  The place where the Hitotsubashi 100B is installed is not particularly limited, such as the sea, a river, a lake, and the like, but here, a case where the Hitotsubashi 100B is installed on the coastal area of the sea will be described as an example. For example, the person bridge 100B has a state in which seawater is filled below the floor deck 1B at high tide as shown in FIG. 6, and the ground below the floor deck 1 is exposed at low tide as shown in FIG. It may be installed in the place. 9 (a) and 9 (b) show variations of the installation example of the person passage 100B. (A) shows the state at high tide, and (b) shows the state at low tide. At low tide, the Hitotsubashi Bridge 100B can be used as a so-called pergola. That is, at low tide, by partially blocking strong sunlight by the slit floor 3, a bright and open space can be formed below the floor deck 1B while blocking sunlight. In addition, the people bridge 100B can also be used as an evacuation site to avoid a tsunami during a natural disaster such as an earthquake.

<Embodiment 4>
Next, an embodiment in which the above-described floor deck 1 is applied to the floating jetty 100C will be described. FIG. 10 is a diagram illustrating a schematic configuration of a floating jetty 100C according to the fourth embodiment. Since the structure of the floor deck 1 has already been described, a detailed description thereof will be omitted. The floating jetty 100 </ b> C includes a floor deck 1, a frame member 104, and a float 105. The frame member 104 is a frame in a plan view shape that is connected to both ends of the beam member 2 of the floor deck 1. The frame member 104 is connected to both ends of the beam member 2 (not shown in FIG. 10) via a fastener, for example, at a predetermined connection location with the floor deck 1. The frame member 104 is attached to the floor deck 1 such that the frame member 104 is surrounded by the frame member 104.

The float 105 is a floating bag (bag body) installed below the floor deck 1, and is attached to the frame member 104. In the example shown in FIG. 9, two floats 105 are attached to the frame member 104, but the number thereof can be changed as appropriate. The float 105 has a hollow portion 106 inside. In normal times, the inside of the hollow portion 106 is filled with air to exert buoyancy, and the floating jetty 100C floats on the water surface (
It is designed to be kept floating.

  Each float 105 is provided with a vent 107 and a water vent 108. The vent 107 is an opening with a lid for introducing and discharging air to the hollow portion 106 of the float 105. The water passage 108 is an opening with a lid for introducing and discharging water with respect to the hollow portion 106 of the float 105.

  The floating jetty 100C can be preliminarily submerged in water when there is a risk of breakage when it remains floating on the water surface, such as when a typhoon or the like is approaching. When the floating jetty 100C is submerged in water, the air in the hollow portion 106 is discharged from the vent 107 of the float 105. Then, water is poured into the hollow portion 106 from the water passage port 108 of the float 105, and the hollow portion 106 is filled with water. Thus, in a state where the air in the hollow portion 106 in the float 105 is discharged from the vent hole 107, the buoyancy of the floating jetty 100C is significantly reduced, so that the floating jetty 100C sinks in water. When the floating jetty 100C sinks, the floating jetty 100C may be subsidized by placing a weight (weight) on the floating jetty 100C as necessary.

  When sinking the floating pier 100C, the floor deck 1 adopts a grid structure, and in particular, the slit floor 3 has a slit structure in which gaps 33 are formed between the floor plates 31, so that the floating pier 100C is submerged in water. It is possible to make it difficult to receive water resistance during work. Therefore, since the sinking work of the floating jetty 100C can be performed easily and in a short time, workability can be improved.

  Further, in the floor deck 1 having the grid structure according to the present embodiment, the floor plate 31, the joist member 4 and the beam member 2 in the slit floor 3 are all arranged in the same layer with respect to the height direction of the floor deck 1. The total height dimension of the floor deck 1 can be kept low. Therefore, it is possible to make it difficult to receive an external force from the side of the floating jetty 100 </ b> C that has been submerged in water. Therefore, when the floating jetty 100C is submerged on the seabed, it can be made less susceptible to the effects of large waves. In addition, when the floating jetty 100C is sunk to the bottom of the river, it can be made less susceptible to the turbulent flow that flows vigorously from the upstream when the water increases, and it is easy to avoid collision of driftwood and the like. . Therefore, by applying the floor deck according to any one of Embodiments 1 to 3 to the floating pier 100C, it is possible to provide the floating pier 100C that is not easily damaged during a natural disaster such as a typhoon, a tsunami, or a flood.

  In the above example, when the floating jetty 100C is submerged in water, the hollow portion 106 of the float 105 is filled with water, but at least the air in the hollow portion 106 may be discharged. In the present embodiment, the case where the floating pier 100C is applied to the floor deck 1 described in the first embodiment has been described. However, the floor decks 1A and 1B according to any other embodiment are applied to the floating pier 100C. May be. Further, the above embodiments and modifications can be implemented in combination as much as possible.

DESCRIPTION OF SYMBOLS 1 ... Floor deck 2 ... Beam member 3 ... Slit floor 4 ... joist member 31 ... floor board 32 ... spacer member 33 ... gap

Claims (2)

A slit floor having a plurality of floor boards, and a gap is formed between adjacent floor boards,
A joist member that supports the slit floor and extends in a direction intersecting the floor board,
A beam member that supports the joist member and extends along the longitudinal direction of the floorboard;
With
Each floor board in the slit floor, the joist member and the beam member are assembled in a grid shape, and a floor deck having a grid structure constructed on the water surface,
The joist member and the beam member are arranged in the same layer with respect to the height direction of the floor deck by supporting an end portion of the joist member by a support portion provided in a longitudinal section of the beam member. ,
The slit floor is laminated and supported on the joist member, and
The slit floor is inserted into a through-hole formed in the floor plate so as to connect the floor plates to each other, and has a rod-like member different from the joist member, and a spacer member having a hollow portion through which the rod-like member can be inserted. And the spacer member through which the rod-shaped member is inserted into the hollow portion is disposed between adjacent floor plates,
A gap formed between adjacent floor plates of the slit floor is configured as a passage for allowing water acting from below the slit floor to escape above the slit floor,
Floor deck with grid structure. A floor deck having the grid structure according to claim 1 ;
A floating pier provided below the beam member,
The float is a bag body having a hollow portion therein,
The bag body is provided with a vent for introducing and discharging air to the hollow portion,
Floats on the water surface in a state where the hollow portion is filled with air, and sinks into the water in a state where the air in the hollow portion is discharged from the vent;
Floating pier.

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