JP2023132814A - floor slab - Google Patents

Abstract

To provide a floor slab capable of transmitting shearing force further effectively.SOLUTION: A floor slab according to one embodiment is a floor slab 70 extending in a bridge-axis direction D1, a bridge-axis-orthogonal direction D2 orthogonal to the bridge-axis direction D1, and a height direction D3 orthogonal to both the bridge-axis direction D1 and the bridge-axis-orthogonal direction D2. The floor slab 70 has an end face 73 facing another floor slab, and a plurality of convex parts 74 projecting toward the other floor slab is arranged on the end face 73. At least one face of each convex part 74 is an inclined surface 78 inclined with respect to the bridge-axis direction D1, the bridge-axis-perpendicular direction D2, and the height direction D3, an inclined surface 78 of one convex part 74 is inclined so as to approach or separate from the other convex part 74 from one side to the other side in the height direction D3.SELECTED DRAWING: Figure 6

Description

The present disclosure relates to floor slabs.

JP 2020-186614A describes a connection part structure of a precast floor slab and a method for constructing the connection part. In the precast deck connection structure, multiple precast deck slabs are installed on top of the bridge girder. Each precast deck slab has a connecting end that faces the other precast deck slab.

A joint reinforcing bar is provided at the connecting end, and a notch recess having a predetermined height is formed at the top end of the connecting end. A connecting top member is installed in a pair of notch recesses of a pair of precast floor slabs. Moreover, each connection end has an uneven surface, and the filling hardening material is filled between the uneven surfaces of the pair of connection ends. This uneven surface has an uneven shape when viewed from the side.

Japanese Patent Application Publication No. 2020-186614

In the precast floor slab described above, shear force can be transmitted in the height direction between each of the pair of precast floor slabs and the filler material. However, since shear force may not be transmitted in directions other than the height direction, there is room for improvement in terms of shear force transmission. Therefore, it is required to be able to transmit shear force more effectively.

The present disclosure aims to provide a deck slab that can transmit shear force more effectively.

The deck according to the present disclosure is a deck that extends in a bridge axis direction, a bridge axis perpendicular direction perpendicular to the bridge axis direction, and a height direction perpendicular to both the bridge axis direction and the bridge axis perpendicular direction. The floor slab has an end face that faces another floor slab, and a plurality of convex portions that protrude toward the other floor slab are lined up on the end face. At least one surface of each convex portion is an inclined surface that is inclined with respect to the bridge axis direction, the direction perpendicular to the bridge axis, and the height direction. The inclined surface of one protrusion is inclined so as to approach or separate from the other protrusion as it goes from one side to the other in the height direction.

This floor slab has an end face that faces another floor slab, and a convex portion that projects toward the other floor slab is formed on this end face. Therefore, the shearing force that acts between each floor slab and the filler material after the filler material is filled between this deck slab and the other deck slab can be transmitted, so the shear strength can be increased. . Furthermore, the convex portion formed on the end surface facing the other deck has an inclined surface that is inclined with respect to the bridge axis direction, the direction perpendicular to the bridge axis, and the height direction. This inclined surface is inclined so as to approach or separate from other convex portions as it goes from one side to the other in the height direction. Therefore, shear force can be transmitted between the deck slab and the filler material in three directions: the bridge axis direction, the direction perpendicular to the bridge axis, and the height direction, so the shear force can be transmitted more effectively. can.

In the floor slab described above, the convex portion has a plurality of inclined surfaces, and the plurality of inclined surfaces include a first inclined surface located on one side in the height direction and a second inclined surface located on the other side in the height direction. The first inclined surface and the second inclined surface may be lined up in the height direction. The first inclined surface may face one of diagonally downward and diagonally upward, and the second inclined surface may face the other of diagonally downward and diagonally upward. In this case, the first slope is Shear force can be transmitted in three directions via either the surface or the second inclined surface. Therefore, the transmission of shear force between the floor slab and the filler material can be made more effective.

The floor slab described above may include reinforcing bars protruding from the convex portion. In this case, compared to a floor slab that includes reinforcing bars protruding from parts other than the convex portions, it is easier to remove the formwork used when manufacturing the floor slab. Therefore, the floor slab can be manufactured easily.

According to the present disclosure, shear force can be transmitted more effectively.

FIG. 2 is a side cross-sectional view showing the joining structure according to the first embodiment. 2 is a plan view showing the joining structure of FIG. 1. FIG. FIG. 2 is a perspective view schematically showing a continuous fiber reinforcing material. FIG. 7 is a side sectional view showing a joining structure according to a second embodiment. 5 is a plan view showing the joining structure of FIG. 4. FIG. It is a perspective view showing the floor slab concerning a 3rd embodiment. FIG. 7 is a plan view showing the floor slab of FIG. 6; 7 is a side view showing an end surface of the floor slab of FIG. 6. FIG. It is a perspective view showing the floor slab concerning a 4th embodiment. 10 is a plan view showing the floor slab of FIG. 9. FIG.

Hereinafter, embodiments of a floor slab and a joint structure of the floor slab according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and redundant description will be omitted as appropriate. In addition, some parts of the drawings may be simplified or exaggerated for ease of understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

(First embodiment)
FIG. 1 is a sectional view showing a joining structure 1 according to the first embodiment. FIG. 2 is a plan view showing the joining structure 1. As shown in FIGS. 1 and 2, the joint structure 1 includes a first floor slab 10, a second floor slab 20 provided at a position apart from the first floor slab 10, and a first floor slab 10 and a second floor slab 20. A filler material 30 is filled between the floor slabs 20.

The first deck slab 10, the second deck slab 20, and the filler material 30 constitute, for example, a bridge. As an example, the bridge is a highway bridge. The bridge includes, for example, a plurality of girders extending in the bridge axis direction D1 and a plurality of support members extending in the bridge axis perpendicular direction D2 between the plurality of girders, and the first deck slab 10 is placed on the plurality of girders. And the second floor slab 20 is arranged so as to extend in the bridge axis direction D1 and the bridge axis perpendicular direction D2. The bridge axis direction D2 is orthogonal to the bridge axis direction D1.

Each of the first floor slab 10 and the second floor slab 20 is, for example, a precast concrete floor slab manufactured in advance at a factory. Each of the first floor slab 10 and the second floor slab 20 is, for example, a UFC floor slab that does not have reinforcing steel and is made of ultra high strength fiber reinforced concrete (UFC). It is. Further, the first floor slab 10 and the second floor slab 20 may be formed of UHPFRC (Ultra High Performance Fiber Reinforced Cementitious Composite).

The first deck 10 has an upper surface 11 extending in the bridge axis direction D1 and a direction perpendicular to the bridge axis D2, and a lower surface 12 extending in the bridge axis direction D1 and the bridge axis perpendicular direction D2 on the opposite side of the upper surface 11 of the first deck 10. and a first end surface 13 extending in a direction D2 perpendicular to the bridge axis and in a height direction D3. The height direction D3 corresponds to the thickness direction of the first floor slab 10 and the second floor slab 20.

Each of the upper surface 11 and the lower surface 12 is, for example, flat. The first end surface 13 has a first convex portion 14 that projects toward the second floor slab 20 and a first recess 15 that is depressed in a direction away from the second floor slab 20. The first end surface 13 has, for example, a plurality of first convex portions 14. The first convex portion 14 protrudes in a side view (when viewed along the horizontal direction), and the first recess 15 is depressed in a side view. The first convex portion 14 and the first concave portion 15 are arranged along the height direction D3.

The first convex portion 14 has, for example, a trapezoidal shape including a top surface 14b and a pair of inclined surfaces 14c located on both sides in the height direction D3 when viewed from the top surface 14b. The first recess 15 has, for example, a trapezoidal shape including a bottom surface 15b and a pair of inclined surfaces 15c located on both sides in the height direction D3 when viewed from the bottom surface 15b. Each inclined surface 15c is provided on an extension (on the same plane) of the inclined surface 14c.

The configuration of the second floor slab 20 is, for example, similar to the configuration of the first floor slab 10. The second floor slab 20 has an upper surface 21, a lower surface 22, and a second end surface 23 facing the first end surface 13 in the bridge axis direction D1. The second end surface 23 has a second convex portion 24 that projects toward the first floor slab 10 and a second recess 25 that is depressed in a direction away from the first floor slab 10 .

For example, the second convex portion 24 protrudes in a side view, and the second recess 25 is depressed in a side view. The second convex portion 24 has, for example, a top surface 24b and a pair of inclined surfaces 24c located on both sides of the height direction D3 when viewed from the top surface 24b, and the second recess 25 has a bottom surface 25b and a pair of inclined surfaces 24c located on both sides of the height direction D3 when viewed from the top surface 24b. , and a pair of inclined surfaces 25c located on both sides of the height direction D3 when viewed from the bottom surface 25b.

For example, in the joining structure 1, the top surface 14b of the first convex portion 14 and the top surface 24b of the second convex portion 24 face each other in the bridge axis direction D1, and the bottom surface 15b of the first concave portion 15 and the second concave portion 25 The first deck slab 10 and the second deck slab 20 are installed so that the bottom surface 25b of the bridge deck 10 faces the bottom surface 25b of the bridge in the bridge axis direction D1. However, in the joint structure, the top surface 14b of the first convex portion 14 and the bottom surface 25b of the second convex portion 25 face each other in the bridge axis direction D1, and the bottom surface 15b of the first concave portion 15 and the top surface of the second convex portion 24 face each other in the bridge axis direction D1. The first deck slab 10 and the second deck slab 20 may be installed so that the surfaces 24b face each other in the bridge axis direction D1.

Further, in the above, the first convex portion 14 has a trapezoidal shape having a top surface 14b and a pair of inclined surfaces 14c, and the first recessed portion 15 has a trapezoidal shape having a bottom surface 15b and a pair of inclined surfaces 15c. explained. However, the first convex portion 14 and the first concave portion 15 may have a shape other than a trapezoid. For example, the first convex portion may have a rectangular shape having a top surface, an upper surface, and a lower surface, and the first recessed portion may have a rectangular shape having a bottom surface, an upper surface, and a lower surface. The same applies to the second convex portion 24 and the second concave portion 25.

For example, the filler material 30 is a cement material that has fluidity during filling and hardens after a certain period of time has elapsed from the time of filling. The filler material 30 may be non-shrinkage mortar, cast-in-place UFC, or UHPFRC, and various materials can be used as the filler material 30.

The first floor slab 10 has a first continuous fiber reinforcement 16 that protrudes from the first end surface 13 toward the second floor slab 20 . The first continuous fiber reinforcement 16 extends, for example, along the bridge axis direction D1. A part of the first continuous fiber reinforcement material 16 is buried in the first deck slab 10, and the depth of the portion of the first continuous fiber reinforcement material 16 buried in the first deck slab 10 (in the bridge axial direction D1) is (length) is longer than the length at which the concrete of the first floor slab 10 can be fixed. For example, the first floor slab 10 has a plurality of first continuous fiber reinforcing materials 16, and the plurality of first continuous fiber reinforcing materials 16 are lined up along the height direction D3. Further, the plurality of first continuous fiber reinforcing materials 16 are arranged along the direction D2 perpendicular to the bridge axis.

For example, the first continuous fiber reinforcing material 16 protrudes from the first convex portion 14 (as an example, the top surface 14b of the first convex portion 14). However, the first continuous fiber reinforcing material 16 may protrude from the inclined surface 14c (or inclined surface 15c), or may protrude from the first recess 15 (as an example, the bottom surface 15b of the first recess 15). In this way, the location where the first continuous fiber reinforcing material 16 protrudes is not particularly limited.

Like the first floor slab 10, the second floor slab 20 has a second continuous fiber reinforcing material 26 that protrudes from the second end surface 23 toward the first floor slab 10. A part of the second continuous fiber reinforcement material 26 is buried in the second floor slab 20, and the depth of the part of the second continuous fiber reinforcement material 26 buried in the second floor slab 20 is It is longer than the length that can hold 20 pieces of concrete. The second floor slab 20 has a plurality of second continuous fiber reinforcing materials 26, and the plurality of second continuous fiber reinforcing materials 26 are arranged along each of the bridge axis perpendicular direction D2 and the height direction D3.

For example, the second continuous fiber reinforcing material 26 protrudes from the second convex portion 24 (as an example, the top surface 24b of the second convex portion 24). However, like the first continuous fiber reinforcement 16, the location where the second continuous fiber reinforcement 26 protrudes is not particularly limited. For example, the position of the second continuous fiber reinforcement 26 in the height direction D3 is the same as the position of the first continuous fiber reinforcement 16 in the height direction D3.

For example, in a plan view (when viewed along the height direction D3), the first continuous fiber reinforcing materials 16 and the second continuous fiber reinforcing materials 26 are arranged alternately along the direction D2 perpendicular to the bridge axis. However, the positions of the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26 are not limited to the above example, and can be changed as appropriate. Further, the configuration of the first continuous fiber reinforcement material 16 is, for example, the same as the configuration of the second continuous fiber reinforcement material 26. Therefore, in the following, when it is not necessary to identify the first continuous fiber reinforcement material 16 and the second continuous fiber reinforcement material 26, the first continuous fiber reinforcement material 16 and the second continuous fiber reinforcement material 26 will be collectively referred to as continuous fiber reinforcement material 16 and second continuous fiber reinforcement material 26. This will be explained as the reinforcing material 6.

FIG. 3 is a perspective view schematically showing the continuous fiber reinforcing material 6. As shown in FIG. As shown in FIG. 3, the continuous fiber reinforcement 6 is, for example, a continuous fiber reinforced strand. That is, the continuous fiber reinforcing material 6 is in a state in which a plurality of wires 7 formed by bundling continuous fibers are twisted together and hardened with resin. The continuous fiber reinforcement material 6 has higher rust prevention than reinforcing bars, and is made of a material that has higher corrosion resistance than iron.

The continuous fiber reinforcement material 6 is, for example, a carbon fiber rod. As an example, the continuous fiber reinforcing material 6 includes a plurality of wires 7, and is formed by twisting the plurality of wires 7 together in a spiral shape. The wire 7 includes resin. The wire 7 is made of, for example, matrix resin. Examples of the matrix resin include epoxy resin and vinyl ester resin. The wire 7 may be reinforced with carbon fiber, aramid fiber, basalt fiber, or glass fiber, for example.

Next, the effects obtained from the joining structure 1 according to this embodiment will be explained. As shown in FIGS. 1 and 2, in the joint structure 1, the first floor slab 10 has a first end surface 13 facing the second floor slab 20, and the second floor slab 20 has a first end surface 13 facing the second floor slab 20. It has second end surfaces 23 facing each other, and a filling material 30 is filled between the first end surface 13 and the second end surface 23 . The first floor slab 10 has a first continuous fiber reinforcement 16 projecting from the first end surface 13 , and the second floor slab 20 has a second continuous fiber reinforcement 26 projecting from the second end surface 23 . Therefore, since the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26, which are not rust-prone, protrude from the first end surface 13 and the second end surface 23, respectively, instead of reinforcing bars, the possibility of corrosion is reduced. can be reduced. Therefore, corrosion of the members constituting the first deck slab 10 and the second deck slab 20 can be suppressed more reliably, and the reliability of corrosion prevention can be increased.

Further, the first end surface 13 is formed with a first convex portion 14 projecting toward the second floor slab 20 and a first recess 15 recessed in a direction away from the second floor slab 20. A second convex portion 24 that projects toward the first floor slab 10 and a second recess 25 that is depressed in a direction away from the first floor slab 10 are formed on the second end surface 23 . For example, each of the first convex portion 14 and the second convex portion 24 protrudes in a side view, and each of the first concave portion 15 and the second concave portion 25 is depressed in a side view. Therefore, the shearing force in the height direction D3 acting between each of the first floor slab 10 and the second floor slab 20 and the filler material 30 can be transmitted more effectively, so that the shear strength can be increased.

In this embodiment, the first floor slab 10 and the second floor slab 20 do not have reinforcing bars and are made of ultra-high strength fiber-reinforced concrete. Therefore, since the first floor slab 10 and the second floor slab 20 do not have reinforcing bars, corrosion of the members constituting the first floor slab 10 and the second floor slab 20 can be more reliably avoided. Furthermore, since the first floor slab 10 and the second floor slab 20 do not have reinforcing bars and are made of ultra-high strength fiber-reinforced concrete, the first floor slab 10 and the second floor slab 20 can be constructed while maintaining high strength. 20 can be made thinner.

In this embodiment, the filler material 30 is made of ultra-high strength fiber reinforced concrete. Therefore, the distance between the first end surface 13 and the second end surface 23 can be shortened while maintaining high strength, and reinforcing bars disposed between the first end surface 13 and the second end surface 23 can be made unnecessary.

(Second embodiment)
Next, a joining structure 41 according to a second embodiment will be described with reference to FIGS. 4 and 5. A part of the configuration of the joining structure 41 is the same as a part of the configuration of the joining structure 1 described above. Therefore, in the following description, descriptions that overlap with the description of the joining structure 1 will be given the same reference numerals and omitted as appropriate. The joint structure 41 includes a support member 42 extending in the bridge axis direction D1, a first floor slab 50 and a second floor slab 60 arranged on the support member 42 in a direction perpendicular to the bridge axis D2, and a first floor slab 42 that extends in the bridge axis direction D1. It includes a filler material 30 that is filled between the slab 50 and the second floor slab 60.

The support member 42 is, for example, a steel girder having an upper flange 42b, a web 42c and a lower flange 42d. However, the support member 42 is not limited to a steel girder, and may be a PC girder, for example. The joint structure 41 is provided at a site A, and for example, the site A is a construction site on an expressway. For example, at site A, the floor slabs including the first floor slab 50 and the second floor slab 60 are being updated.

For example, the first floor slab 50 and the second floor slab 60 have a rectangular plate shape having a short side extending in the bridge axis direction D1 and a long side extending in the bridge axis perpendicular direction D2, and having a thickness in the height direction D3. exhibits. The first floor slab 50 and the second floor slab 60 are, for example, UFC floor slabs made of ultra-high strength fiber-reinforced concrete, like the first floor slab 10 and second floor slab 20 described above. The material of the first floor slab 50 and the second floor slab 60 is, for example, the same as the material of the first floor slab 10 and the second floor slab 20.

The first deck 50 has an upper surface 51 that extends in the bridge axis direction D1 and a direction perpendicular to the bridge axis D2, and a lower surface 52 that extends in the bridge axis direction D1 and the bridge axis perpendicular direction D2 on the opposite side of the upper surface 51 of the first deck 50. and a first end surface 53 extending in the bridge axis direction D1 and the height direction D3. The first end surface 53 has a first convex portion 54 that projects toward the second floor slab 20 and a first recess 55 that is depressed in a direction away from the second floor slab 60.

The first convex portion 54 protrudes in a plan view, and the first recess 55 is depressed in a plan view. The first convex portion 54 and the first concave portion 55 are arranged along the bridge axis direction D1. The respective shapes of the first convex portion 54 and the first recessed portion 55 are, for example, the same as the respective shapes of the first convex portion 14 and the first recessed portion 15 described above. Therefore, detailed description of the shapes of the first convex portion 54 and the first concave portion 55 will be omitted.

The configuration of the second floor slab 60 is, for example, similar to the configuration of the first floor slab 50. The second floor slab 60 has an upper surface 61, a lower surface 62, and a second end surface 63 facing the first end surface 53 in the direction D2 perpendicular to the bridge axis. The second end surface 63 has a second convex portion 64 that projects toward the first floor slab 50 and a second recess 65 that is depressed in a direction away from the first floor slab 50 .

The second convex portion 64 protrudes in a plan view, and the second recess 65 is depressed in a plan view. The shape and arrangement of the second protrusion 64 and the second recess 65 are, for example, the same as the shape and arrangement of the second protrusion 24 and the second recess 25 described above. Therefore, a detailed explanation of the shape and arrangement of the second convex portion 64 and the second concave portion 65 will be omitted.

The first floor slab 50 has the first continuous fiber reinforcing material 16 that protrudes from the first end surface 53 toward the second floor slab 60, similar to the first floor slab 10 described above. The second floor slab 60 has the second continuous fiber reinforcing material 26 that protrudes from the second end surface 63 toward the first floor slab 50, similar to the second floor slab 20 described above.

In the first floor slab 50, the plurality of first continuous fiber reinforcing materials 16 are arranged along each of the bridge axis direction D1 and the height direction D3. Similarly, in the second floor slab 60, the plurality of second continuous fiber reinforcing materials 26 are arranged along each of the bridge axis direction D1 and the height direction D3. In the joint structure 41, the first continuous fiber reinforcing materials 16 and the second continuous fiber reinforcing materials 26 are alternately arranged in a plan view.

The joining structure 41 includes a slip prevention member 43 that fits between the first floor slab 50 and the second floor slab 60. The anti-slip member 43 is, for example, a stud dowel (headed stud). The anti-slip member 43 includes, for example, a fixed portion 43b fixed to the upper flange 42b of the support member 42, and a rod-shaped portion 43c extending in a rod shape from the fixed portion 43b along the height direction D3.

For example, the joint structure 41 has a plurality of anti-slip members 43, and the plurality of anti-slip members 43 are lined up along the bridge axis direction D1. For example, the plurality of anti-slip members 43 are arranged along the direction D2 perpendicular to the bridge axis. In the joining structure 41, the anti-slip member 43 and the filler material 30 are integrated, and each of the first floor slab 50 and the second floor slab 60 and the filler material 30 are integrated.

As described above, the joint structure 41 according to the second embodiment includes the support member 42 that supports the first floor slab 50 and the second floor slab 60. They face each other in the upper part along the direction D2 perpendicular to the bridge axis. Each of the first convex portion 54 and the second convex portion 64 protrudes in plan view, and each of the first concave portion 55 and second concave portion 65 is depressed in plan view.

As described above, the first floor slab 50 and the second floor slab 60 are opposed to each other on the support member 42 along the direction D2 perpendicular to the bridge axis, and the first floor slab 50 and the second floor slab 60 are on the support member 42 . When a joint part of the floor slab 60 is located, a negative bending that causes upper edge tension may act on the joint part. In contrast, in the second embodiment, the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26 are fixed to the first floor slab 50, the second floor slab 60, and the filler material 30, so the above-mentioned negative Can resist bending. Further, the first convex portion 54 and the second convex portion 64 protrude in plan view, and the first concave portion 55 and second concave portion 65 are depressed in plan view. That is, in the joint structure 41, since the first end surface 53 and the second end surface 63 have an uneven shape in a plan view, horizontal shearing force is more applied to each of the first floor slab 50 and second floor slab 60 and the filler material 30. Able to communicate effectively.

The joint structure 41 includes a support member 42 that supports the first floor slab 50 and the second floor slab 60, and a slip stopper that projects upward from the support member 42 and enters between the first floor slab 50 and the second floor slab 60. A member 43 is provided. Therefore, the horizontal shearing force is transmitted between the support member 42 and the filler material 30 by the anti-slip member 43, and the unevenness of the first floor slab 50 and the second floor slab 60 allows the interlayer material 30 and the first floor It becomes possible to transmit horizontal shear force between each of the slab 50 and the second floor slab 60. Therefore, the displacement of the filler material 30, the first floor slab 50, and the second floor slab 60 with respect to the support member 42 can be suppressed more reliably.

(Third embodiment)
Next, a floor slab 70 according to a third embodiment will be described with reference to FIGS. 6, 7, and 8. The floor slab 70 can be used, for example, in place of the first floor slab 50 or the second floor slab 60 described above. Furthermore, the floor slab 70 can also be used in place of the first floor slab 10 or the second floor slab 20 described above. FIG. 6 is a perspective view of the end surface 73 of the floor slab 70 viewed from below. FIG. 7 is a plan view showing the end surface 73 of the floor slab 70. FIG. 8 is a front view of the end surface 73.

The floor slab 70 has reinforcing bars 76, for example. However, the floor slab 70 does not need to have the reinforcing bars 76, for example, when the floor slab 70 is a UFC floor slab. The floor slab 70 has an upper surface 71 extending in the bridge axis direction D1 and a direction perpendicular to the bridge axis D2, a lower surface 72 extending in the bridge axis direction D1 and a direction perpendicular to the bridge axis D2 on the opposite side of the upper surface 71 of the deck slab 70, and a lower surface 72 extending in the bridge axis direction D1 and the bridge axis perpendicular direction D2. It has an end surface 73 extending in the perpendicular direction D2 and the height direction D3.

The end surface 73 is a surface facing another floor slab. A filler material (for example, filler material 30) is filled between the end surface 73 and the other floor slab. The end surface 73 has a convex portion 74 that projects toward the other floor slab, and a recessed portion 75 that is depressed in a direction away from the other floor slab. The end surface 73 has a plurality of protrusions 74 and a plurality of recesses 75.

For example, the convex portion 74 protrudes in a plan view, and the recess 75 is depressed in a plan view. As an example, the convex portions 74 and the concave portions 75 are arranged along the direction D2 perpendicular to the bridge axis. However, in the third embodiment, the protrusions 74 and the recesses 75 may be arranged along the bridge axis direction D1 or the height direction D3, and the direction in which the protrusions 74 and the recesses 75 are arranged is not particularly limited.

The convex portion 74 has, for example, a top surface 77 and a plurality of inclined surfaces 78 that are inclined with respect to the bridge axis direction D1, the bridge axis perpendicular direction D2, and the height direction D3. The recess 75 has, for example, a bottom surface 79 and a plurality of inclined surfaces 80 that are inclined with respect to the bridge axis direction D1, the bridge axis perpendicular direction D2, and the height direction D3. Each inclined surface 80 is provided on an extension of each inclined surface 78 (on the same plane). The inclined surface 78 of one protrusion 74 is inclined so as to approach or separate from the other protrusion 74 as it goes from one side to the other in the height direction D3. That is, the inclined surface 78 is inclined in a direction in which the convex portion 74 widens or narrows as it goes from one side to the other in the height direction D3.

A reinforcing bar 76 protrudes from the protrusion 74 . The floor slab 70 has, for example, a plurality of reinforcing bars 76, and the plurality of reinforcing bars 76 are lined up along the height direction D3. As an example, the reinforcing bars 76 protrude from the top surface 77 of the convex portion 74, and the reinforcing bars 76 are arranged in pairs above and below on the top surface 77. However, the floor slab 70 may not have the reinforcing bars 76, and may have the above-described continuous fiber reinforcing material 6 instead of the reinforcing bars 76, for example.

For example, the top surface 77 is a flat surface. As an example, the top surface 77 has a drum shape. In this case, the length of the top surface 77 in the horizontal direction (for example, in the direction D2 perpendicular to the bridge axis) increases from the center of the end surface 73 in the height direction D3 toward both ends of the end surface 73 in the height direction D3. For example, bottom surface 79 is a flat surface. As an example, the bottom surface 79 has a hexagonal shape. In this case, the length of the bottom surface 79 in the horizontal direction becomes shorter from the center of the end surface 73 in the height direction D3 toward both ends of the end surface 73 in the height direction D3.

For example, the inclined surface 78 is flat. As an example, the inclined surface 78 has a rectangular shape. The plurality of inclined surfaces 78 include a first inclined surface 78b located on one side (e.g., upper side) in the height direction D3, and a second inclined surface 78c located on the other side (e.g., lower side) in the height direction D3. and has. The direction of the first inclined surface 78b is different from the direction of the second inclined surface 78c. The first inclined surface 78b of one convex portion 74 is inclined so as to be separated from the other convex portions 74 (in the direction in which the convex portions 74 become narrower) as it goes downward from the upper end. Further, the second inclined surface 78c of one convex portion 74 is inclined so as to approach the other convex portions 74 (in the direction in which the convex portions 74 spread) as it goes downward from the upper end.

The first inclined surface 78b faces one of diagonally downward and diagonally upward, and the second inclined surface 78c faces the other of diagonally downward and diagonally upward. As a specific example, the first inclined surface 78b is directed diagonally downward, and the second inclined surface 78c is directed diagonally upward. That is, the normal line of the first inclined surface 78b extends obliquely downward from the first inclined surface 78b, and the normal line of the second inclined surface 78c extends obliquely upward from the second inclined surface 78c.

As described above, the floor slab 70 according to the third embodiment has an end face 73 that faces another floor slab, and a convex portion 74 that projects toward the other floor slab is formed on the end face 73. Therefore, the shear force that acts between each floor slab and the filler material after the filler material is filled between the floor slab 70 and the other floor slab can be more effectively transmitted, so the shear strength can be increased. can be increased. Furthermore, the convex portion 74 formed on the end surface 73 facing the other deck has an inclined surface 78 that is inclined with respect to the bridge axis direction D1, the bridge axis perpendicular direction D2, and the height direction D3. The inclined surface 78 is inclined so as to approach or separate from the other convex portions 74 as it goes from one side to the other side in the height direction D3. Therefore, the shearing force can be transmitted between the deck slab 70 and the filler material in three directions, ie, the bridge axis direction D1, the bridge axis perpendicular direction D2, and the height direction D3, through the inclined surface 78, so that the shear force can be transmitted more effectively. Can transmit shear force. Furthermore, in the third embodiment, the filling material 30 can be filled more reliably than in the first embodiment. For example, in the case of the first embodiment, there is a concern that air pockets may be formed under the convex portion, but in the third embodiment, the occurrence of such air pockets can be suppressed more reliably.

In the floor slab 70 according to the third embodiment, the convex portion 74 has a plurality of inclined surfaces 78, and the plurality of inclined surfaces 78 include a first inclined surface 78b located on one side in the height direction D3, and a first inclined surface 78b located on one side in the height direction D3. The first inclined surface 78b and the second inclined surface 78c are arranged in the height direction D3. The first inclined surface 78b faces one of diagonally downward and diagonally upward (in the above example, diagonally downward), and the second inclined surface 78c faces the other of diagonally downward and diagonally upward (in the above example, diagonally upward). ). Therefore, the first Shear force can be transmitted in three directions via either the inclined surface 78b or the second inclined surface 78c. Therefore, the transmission of shear force between the floor slab 70 and the filler material can be made more effective.

The floor slab 70 according to the third embodiment may include reinforcing bars 76 protruding from the convex portion 74. Therefore, compared to a floor slab that includes reinforcing bars protruding from portions other than the convex portions 74 (for example, the recessed portions 75), the formwork used when manufacturing the floor slab 70 can be easily removed. Therefore, the floor slab 70 can be manufactured easily.

(Fourth embodiment)
Next, a floor slab 90 according to a fourth embodiment will be described with reference to FIGS. 9 and 10. Like the floor slab 70, the floor slab 90 can be used in place of the first floor slab 50 or the second floor slab 60 described above. A part of the structure of the floor slab 90 is the same as a part of the structure of the floor slab 70. Therefore, the explanation that overlaps with the floor slab 70 will be omitted as appropriate.

FIG. 9 is a perspective view of the end surface 93 of the floor slab 90 viewed from below. FIG. 10 is a plan view showing the end surface 93 of the floor slab 90. As shown in FIGS. 9 and 10, the upper surface 91 extends in the bridge axis direction D1 and the bridge axis perpendicular direction D2, and the deck 90 extends in the bridge axis direction D1 and the bridge axis perpendicular direction D2 on the opposite side of the upper surface 91 of the deck 90. It has a lower surface 92 and an end surface 93 extending in a direction D2 perpendicular to the bridge axis and in a height direction D3.

The end surface 93 has a convex portion 94 that projects toward the other floor slab mentioned above, and a recessed portion 95 that is depressed in a direction away from the other floor slab. The convex portion 94 has, for example, a top surface 97 and a plurality of inclined surfaces 98 that are inclined with respect to the bridge axis direction D1, the bridge axis perpendicular direction D2, and the height direction D3. The recess 95 has, for example, a bottom surface 99 and a plurality of inclined surfaces 100 that are inclined with respect to the bridge axis direction D1, the bridge axis perpendicular direction D2, and the height direction D3. The inclined surface 98 of one protrusion 94 is inclined so as to approach the other protrusion 94 from the upper end to the lower end (in the direction in which the protrusion 94 widens).

For example, the top surface 97 has a trapezoidal shape. In this case, the length of the top surface 97 in the horizontal direction (for example, the direction D2 perpendicular to the bridge axis) increases from one side (for example, the upper side) to the other side (for example, the lower side) in the height direction D3 of the end surface 93. become longer. For example, the bottom surface 99 has a trapezoidal shape. In this case, the length of the bottom surface 99 in the horizontal direction becomes shorter from one side of the end surface 93 in the height direction D3 to the other side. For example, the inclined surface 98 has a rectangular shape. As an example, the inclined surface 98 has a parallelogram shape. The inclined surface 98 faces either diagonally downward or diagonally upward, and for example, faces diagonally upward. That is, the normal line of the inclined surface 98 extends obliquely upward from the inclined surface 98.

As described above, the floor slab 90 according to the fourth embodiment has an end face 93 that faces another floor slab, and a convex portion 94 that projects toward the other floor slab is formed on the end face 93. The convex portion 94 formed on the end surface 93 facing the other deck has an inclined surface 98 that is inclined with respect to the bridge axis direction D1, the bridge axis perpendicular direction D2, and the height direction D3. Therefore, shearing force can be transmitted between the deck slab 90 and the filler material in three directions, ie, the bridge axis direction D1, the bridge axis perpendicular direction D2, and the height direction D3, more effectively. Can transmit shear force. Therefore, the same effect as the floor slab 70 can be obtained from the floor slab 90. In addition, in the fourth embodiment, a floor slab 90 in which a convex portion 94 having an inclined surface 98 directed diagonally upward is formed has been described. However, a floor slab may be formed with a convex portion having both an inclined surface 98 directed diagonally upward and a sloped surface directed diagonally downward. In this way, the type and arrangement of the inclined surfaces of the convex portions of the floor slab can be changed as appropriate.

Various embodiments of the floor slab and the joint structure of the floor slab according to the present disclosure have been described above. However, the floor slab and the joining structure of the floor slab according to the present disclosure are not limited to the above-described embodiments, and can be modified as appropriate within the scope of the gist of the claims. . That is, the shape, size, material, number, and arrangement of each part in the floor slab and the joint structure of the floor slab can be changed as appropriate within the scope of the above-mentioned gist.

For example, in the above-described first embodiment, as shown in FIG. 1, the joint structure 1 was described which includes the first deck slab 10 and the second deck slab 20 facing each other along the bridge axis direction D1. However, the first floor slab 10 and the second floor slab 20 may be opposed to each other along the direction D2 perpendicular to the bridge axis, and the direction in which the first floor slab and the second floor slab face each other is not particularly limited.

For example, in the second embodiment described above, the joining structure 41 is provided with the anti-slip member 43 which is a stud dowel. However, the type of anti-slip member is not limited to stud dowels. For example, the anti-slip member may be a perforated steel dowel. That is, various types of anti-slip members can be used as long as they can be integrated with the filler material between the first and second floor slabs.

For example, in the third embodiment described above, the floor slab 70 includes the convex portion 74 having the top surface 77 in the shape of a drum, and the concave portion 75 having the bottom surface 79 in the shape of a hexagon. However, instead of the convex portion 74 and the concave portion 75, a floor slab may be provided with a convex portion having a hexagonal top surface and a concave portion having a drum-shaped bottom surface. That is, the unevenness of the floor slab 70 may be reversed. Furthermore, the shapes of the convex portions and concave portions of the floor slab 70 are not limited to those of the embodiment described above, and can be changed as appropriate. The same applies to the floor slab 90 according to the fourth embodiment.

DESCRIPTION OF SYMBOLS 1, 41... Joining structure, 6... Continuous fiber reinforcement material, 7... Element wire, 10... First floor slab, 11... Top surface, 12... Bottom surface, 13... First end surface, 14... First convex portion, 14b... Top Surface, 14c... Slanted surface, 15... First recess, 15b... Bottom surface, 15c... Slanted surface, 16... First continuous fiber reinforcement, 20... Second floor slab, 21... Top surface, 22... Bottom surface, 23... Second End surface, 24... Second convex portion, 24b... Top surface, 24c... Inclined surface, 25... Second recessed portion, 25b... Bottom surface, 25c... Inclined surface, 26... Second continuous fiber reinforcement material, 30... Interfill material, 42 ...Supporting member, 42b...Upper flange, 42c...Web, 42d...Lower flange, 43...Slip prevention member, 43b...Fixing part, 43c...Bar-shaped part, 50...First floor slab, 51...Upper surface, 52...Lower surface, 53 ...first end surface, 54...first convex portion, 55...first concave portion, 60...second floor slab, 61...upper surface, 62...lower surface, 63...second end surface, 64...second convex portion, 65...second Recessed part, 70... Floor slab, 71... Upper surface, 72... Lower surface, 73... End surface, 74... Convex part, 75... Recessed part, 76... Rebar, 77... Top surface, 78... Inclined surface, 78b... First inclined surface, 78c ...Second slope, 79...Bottom surface, 80...Slope, 90...Slab, 91...Top surface, 92...Bottom surface, 93...End surface, 94...Convex portion, 95...Concave portion, 97...Top surface, 98...Slope surface , 99...Bottom surface, 100...Slope surface, A...Site, D1...Bridge axis direction, D2...Bridge axis perpendicular direction, D3...Height direction.

Claims (3)

A deck slab extending in a bridge axis direction, a bridge axis perpendicular direction perpendicular to the bridge axis direction, and a height direction perpendicular to both the bridge axis direction and the bridge axis perpendicular direction,
having an end face facing another floor slab,
A plurality of convex portions protruding toward the other floor slab are lined up on the end surface,
At least one surface of each of the convex portions is an inclined surface that is inclined with respect to the bridge axis direction, the bridge axis perpendicular direction, and the height direction,
The inclined surface of one of the protrusions is inclined so as to approach or separate from the other protrusion as it goes from one side to the other in the height direction.
Floor slab. The convex portion has a plurality of the inclined surfaces,
The plurality of inclined surfaces include a first inclined surface located on one side in the height direction and a second inclined surface located on the other side in the height direction,
The first inclined surface and the second inclined surface are lined up in the height direction,
The first inclined surface faces one of diagonally downward and diagonally upward,
the second inclined surface faces the other of diagonally downward and diagonally upward;
The floor slab according to claim 1. comprising a reinforcing bar protruding from the convex portion;
The floor slab according to claim 1 or 2.

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