Floor slab joining structure

Abstract

To provide a floor slab joining structure capable of improving a shearing load bearing capacity at each corner of each of floor slabs installed so as to be adjacent to each other with a joint in between.SOLUTION: This floor slab joining structure configured by installing square plate-like ferroconcrete floor slabs 10 on a girder so as to be adjacent to each other with a joint 16, 15 between in the bridge axis direction X and the bridge axis perpendicular direction Y of a bridge, connecting the adjacent floor slabs using a floor slab join device 1, 1A, and filling the joint with a filler 17 comprises a reinforcement 9 that reinforces the opposing corners of the floor slabs 10, 10... installed to be adjacent to each other with the joint in between. The reinforcement 9 includes a recess 9 provided to extend over one side edge surface 11 and the other side edge surface 11 of corner vicinities adjacent to each other with a corner edge as a boundary, a reinforcement material 91 provided to extend into respective recesses 9, 9..., and the filler 17 filling each of the recesses 9, 9....SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a deck slab joint structure for connecting adjacent deck slabs for bridges. [Background technology]

[0002] A known deck joint structure is one in which rectangular reinforced concrete deck slabs are installed on girders so that they are adjacent to each other along the bridge axis direction with joints in between, and adjacent deck slabs along the bridge axis direction are connected using deck joint devices, and the joints are filled with a filler material (see Patent Document 1). In addition, a deck joint structure is known in which rectangular plate-shaped reinforced concrete deck slabs are installed on girders so that they are adjacent to each other via joints in the bridge axis direction and in the direction perpendicular to the bridge axis, and adjacent deck slabs along the bridge axis direction are connected using deck joint devices, and adjacent deck slabs along the direction perpendicular to the bridge axis are connected using deck joint devices, and the joints are filled with filler material (see Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-159233 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-177767 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned deck joint structure, no reinforcing bars or steel materials are provided at the corners of each deck slab, which are installed adjacent to each other through joints, or in the vicinity of those corners, and only a filler material such as mortar is provided in the joints between the corners. Therefore, at each corner of each deck slab, which is installed adjacent to each other with joints in between, the shear force caused by wheel loads is resisted only by the concrete at the corners of the deck slabs and the filler material filled in the joints (see Figure 9(a)), which posed a risk of punching shear failure due to fatigue at each corner of each deck slab. The present invention provides a deck slab joint structure that can improve the shear load-bearing capacity at each corner of each deck slab installed adjacent to each other via a joint. [Means for solving the problem]

[0005] The deck joint structure of the present invention is a deck joint structure in which rectangular plate-shaped reinforced concrete deck slabs are installed on girders so that they are adjacent to each other via joints in the bridge axis direction and in the direction perpendicular to the bridge axis, adjacent deck slabs are connected using deck joint devices, and the joints are filled with filler, and is characterized in that it is provided with a reinforcing section that reinforces each of the opposing corners of each deck slab installed adjacent to each other via joints, and the reinforcing section is configured to include a recess at each corner of each deck slab, extending from one edge surface to the other edge surface near the adjacent corner edge, with the corner edge as the boundary, a reinforcing material installed so as to extend within each recess, and a filler material filled in each recess. In addition, the deck slab joint structure of the present invention is a deck slab joint structure in which square plate-shaped reinforced concrete deck slabs are installed on girders so that they are adjacent to each other via joints in the bridge axis direction and in the direction perpendicular to the bridge axis, adjacent deck slabs are connected using deck slab joint devices, and the joints are filled with filler, and is characterized in that it is provided with a reinforcing section that reinforces each of the opposing corners of each deck slab installed adjacent to each other via joints, and the reinforcing section is configured to include a recess at each corner of each deck slab that extends from one edge surface to the other edge surface near the adjacent corner edges, with the corner edge as the boundary, a reinforcing material installed in the joints between adjacent corner edges, and a filler material filled in each recess. The reinforcing material is characterized in that it is composed of a reinforcing plate installed so that its plate surface extends along the plate surface of the deck slab. The reinforcing material is characterized in that it is composed of a reinforcing plate installed so that the plate surface extends along the extension direction of the joint. The reinforcing section is characterized by reinforcing the opposing corners of four deck slabs arranged adjacent to each other with joints in the bridge axis direction and perpendicular to the bridge axis. The reinforcing section is characterized by reinforcing the opposing corners of two decks that are installed adjacent to each other via joints along a direction perpendicular to the bridge axis. The reinforcing plate is characterized by having a through-hole penetrating the plate surface at the center of the plate surface. The reinforcing plate is characterized by having a plurality of through holes penetrating the plate surface. The reinforcing plate is characterized by having irregularities on the plate surface. According to the deck slab joining structure of the present invention, a reinforcing portion is provided that reinforces each of the opposing corner portions of each deck slab that is installed adjacent to each other via joints, making it possible to provide a deck slab joining structure that can improve the bending strength and shear load-bearing capacity at each corner portion of each deck slab that is installed adjacent to each other via joints. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a plan view showing a deck slab joint structure for a bridge (first embodiment). [Figure 2] FIG. 1 is an enlarged plan view showing a reinforcing portion provided at a corner convergence portion where the corner portions of four deck slabs are adjacent to each other (Embodiment 1). [Figure 3] FIG. 1 is a perspective view showing a corner portion of a deck slab (embodiment 1). [Figure 4] 3 is a cross-sectional view showing a reinforcing portion (a cross-sectional view corresponding to the AA cross-section and the BB cross-section in FIG. 2) (Embodiment 1). [Figure 5] 1A and 1B are diagrams showing a reinforcing material, in which FIG. 1A is a plan view of the reinforcing material, and FIG. 1B is a perspective view of the reinforcing material (Embodiment 1). [Figure 6] FIG. 2 is an explanatory diagram showing an example of construction of a reinforcing portion (first embodiment). [Figure 7] 1A and 1B show an example of a deck slab joint device, in which FIG. 1A is an exploded perspective view of the deck slab joint device, and FIG. 1B is a perspective view of the deck slab joint device (first embodiment). [Figure 8] 1A and 1B show an example of a deck slab joint device, in which FIG. 1A is an exploded perspective view of the deck slab joint device, and FIG. 1B is a perspective view of the deck slab joint device (first embodiment). [Figure 9] 1A and 1B are diagrams illustrating the shear resistance to the shear force due to wheel loads acting at each corner of each deck slab installed adjacent to each other through joints, where (a) shows the case of a conventional configuration, and (b) shows the case of the reinforcement part of embodiment 1. [Figure 10] 10A and 10B are diagrams showing a reinforcing portion provided at a corner convergence portion, in which (a) is an enlarged plan view of the main portion, (b) is a BB cross-sectional view of (a), and (c) is a perspective view of the reinforcing material (embodiment 2). [Figure 11] FIG. 10 is a plan view showing the deck slab joint structure (Embodiment 3). [Figure 12] FIG. 10 is an enlarged plan view of a main part showing a reinforcing portion provided at a corner gathering portion (Embodiment 3). [Figure 13] FIG. 10 is an enlarged plan view of a main part showing a reinforcing portion provided at a corner gathering portion (Embodiment 3). [Figure 14] FIG. 10 is an enlarged plan view of a main part showing a reinforcing portion provided at a corner gathering portion (Embodiment 3). [Figure 15] FIG. 10 is an enlarged plan view of a main part showing a reinforcing portion provided at a corner gathering portion (Embodiment 4). DETAILED DESCRIPTION OF THE INVENTION

[0007] Embodiment 1 As shown in Figures 1 and 2, the deck joint structure according to the first embodiment is a deck joint structure in which four rectangular, plate-shaped, reinforced concrete deck slabs 10 are installed on girders (not shown) so as to be adjacent to each other in the bridge axis direction X and the direction perpendicular to the bridge axis Y of the bridge via joints 16 and 15, and adjacent deck slabs 10, 10 along the bridge axis direction X are connected to each other using deck slab joint devices 1A, and adjacent deck slabs 10, 10 along the bridge axis direction Y are connected to each other using deck slab joint devices 1, and the joints 16 and 15 are filled with a filler 17 such as mortar or concrete. The deck joint structure is provided with reinforcing portions 9 that reinforce each of the opposing corners of the four deck slabs 10, 10, 10 arranged adjacent to each other in the bridge axis direction X and the direction perpendicular to the bridge axis Y of the bridge. In other words, for example, the lower right corner of the deck slab 10 at the upper left of Figure 1, the lower left corner of the deck slab 10 at the upper right of Figure 1, the upper right corner of the deck slab 10 at the lower left of Figure 1, and the upper left corner of the deck slab 10 at the upper right of Figure 1 are adjacent to each other via filler 17 filled in joints 16, 15 to form a corner assembly 10C, and this deck slab joint structure has a reinforcing part 9 at the corner assembly 10C.

[0008] The reinforced concrete deck 10 is, for example, a deck containing reinforcing bars, or PC steel wires, or reinforcing bars and PC steel wires. The corner portion refers to a portion in the vicinity of a corner edge 10E of the quadrangular plate-shaped deck 10, as shown in FIG.

[0009] As shown in Figures 2 to 6, the reinforcing portion 9 provided in the above-mentioned corner collection portion 10C is composed of recesses 90 formed in each corner portion of the four deck slabs 10, 10, 10, 10, a reinforcing material 91 provided to extend within each recess 90 of each of the four deck slabs 10, and a filler material 17 filled in each recess 90 of each of the four deck slabs 10.

[0010] As shown in Figure 3, the recess 90 is a recess provided at a corner of the deck slab 10 so as to extend from one edge surface 11 to the other edge surface 11 near adjacent corner edges, with the corner edge 10E as the boundary. In other words, adjacent recesses 90, 90 along the bridge axis direction X are configured so that the openings of the recesses 90 face each other, and adjacent recesses 90, 90 along the bridge axis perpendicular direction Y are also configured so that the openings of the recesses 90 face each other. The edge surface 11 is the surface surrounded by the corner edge 10E of the deck slab 10, the edge 11a on the upper surface of the deck slab 10, and the edge 11b on the lower surface thereof, in other words, the side surface of the deck slab 10.

[0011] The shape of the recess 90 is not particularly limited. The reinforcing member 91 is configured by a reinforcing plate such as a steel plate that is installed so that a plate surface 91f extends along the plate surface of the deck slab 10, as shown in FIG. In other words, the reinforcing material 91 is composed of a flat reinforcing plate having a plate surface 91f with an area slightly smaller than the cross-sectional area of ​​the recess for installing the reinforcing material, which is formed by combining the four recesses 90 at the corner collection portion 10C, and is installed so that the plate surface 91f of the reinforcing plate extends along the plate surface of the deck slab 10. As the reinforcing material 91, for example, as shown in FIGS. 4 and 5, a quadrilateral (for example, square) flat plate having a through-hole 92 for shear resistance and air venting formed in the center of a plate surface 91f is used. Furthermore, the filler material 17 filled in each recess 90 of each of the four deck slabs 10 is the same as the filler material 17 filled in the joints 15, 16, for example.

[0012] Next, the deck slab joint device 1 will be described in detail with reference to FIG. The deck joint device 1 is a deck joint device for connecting one deck 10 and another deck 10 that are installed adjacent to each other on the girder of a bridge, and is a deck joint device that is configured, for example, with one support member 2 as a joint component such as a C-shaped metal that is provided on one deck 10, the other support member 2 as a joint component such as a C-shaped metal that is provided on the other deck 10, and a connecting member 3 such as an H-shaped metal that connects these support members 2, 2.

[0013] The receiving member 2 has an engaged portion 5 as a joint functional portion having an engaging recess 4, and an anchoring portion 6 that is anchored to the concrete of the deck slab 10 in order to anchor the engaged portion 5 to the concrete of the deck slab 10.

[0014] The connecting member 3 has one engaging portion 7 that engages with the engaging recess 4 of one of the receiving members 2, the other engaging portion 7 that engages with the engaging recess 4 of the other receiving member 2, and a connecting portion 8 that connects the one engaging portion 7 and the other engaging portion 7. The material of the connecting member 3 is not particularly limited, but for example, it may be made of a one-piece molded product such as steel, in which cast iron is poured into a formwork not shown in the figure, and one engaging portion 7, the other engaging portion 7, and the connecting portion 8 are molded into one piece.

[0015] The engaged portion 5 comprises a front wall portion 52, a left wall portion 53L extending rearward from the left end of the front wall portion 52, a right wall portion 53R extending rearward from the right end of the front wall portion 52, a bottom portion 51 extending rearward from the lower end of the front wall portion 52, and a rear wall portion 54 extending from the rear ends of the bottom portion 51, the left wall portion 53L, and the right wall portion 53R, and is configured with an upper-opening engaging recess 4 surrounded by the front wall portion 52, the left wall portion 53L, the right wall portion 53R, the bottom 51, and the rear wall portion 54. In this specification, the terms up, down, left, right, front, and rear are defined as directions shown in FIG.

[0016] In other words, the engaged portion 5 comprises a bottom 51, a rear wall 54 rising from the rear edge side of the bottom 51, a left wall 53L and a right wall 53R extending from both the left and right sides of the rear wall 54 and rising from the left and right edges of the bottom 51, and a front wall 52 extending from the extended ends (front ends) 53e, 53e of the left wall 53L and the right wall 53R and rising from the front edge side of the bottom 51.

[0017] The engaged portion 5 has an upper opening facing the bottom 51 and an engaging portion insertion opening 41 (upper opening of the engaging recess 4) which serves as an insertion port for inserting the engaging portion 7 of the connecting member 3 into the engaging recess 4, and the front wall portion 52 has a connecting portion insertion groove 42 which serves as an insertion groove of the upper opening for inserting the connecting portion 8 of the connecting member 3. The opening 41 for inserting the engagement portion is an upper opening surrounded by the upper end of the front wall portion 52, the upper end of the left wall portion 53L, the upper end of the right wall portion 53R, and the upper end of the rear wall portion 54, and is formed by an opening that allows the engagement portion 7 of the connecting member 3 to be inserted into the engagement recess 4 from above. The front wall portion 52 is a wall body having a front wall surface 52a that is exposed to the edge surface 11 when the receiving member 2 is installed on the edge surface 11 side of the deck slab 10, and has the above-mentioned connecting portion insertion groove 42 for inserting the connecting portion 8 of the connecting member 3. The connecting portion insertion groove 42 is an upper-opening groove that extends continuously in the vertical direction from the upper end side of the front wall portion 52 to the bottom portion 51 side in the central portion between the left and right sides of the front wall portion 52, and is formed with a groove width that allows the connecting portion 8 of the connecting member 3 to be inserted from above.

[0018] The fixing unit 6 includes a left fixing unit 6L and a right fixing unit 6R. The left fixing portion 6L includes upper and lower fixing members 60, 60 that extend rearward from a left-side extended front wall portion 55L that serves as a connecting portion that protrudes leftward from the left end of the front wall portion 52 of the engaged portion 5. That is, the upper and lower fixing members 60, 60 that constitute the left fixing portion 6L are arranged to extend rearward from the rear surface 55b of the left-side extended front wall portion 55L, which serves as a connecting portion with the engaged portion 5, passing beside the outer surface 53f of the left wall portion 53L. The right fixing portion 6R includes upper and lower fixing members 60, 60 that extend rearward from a right-side extended front wall portion 55R serving as a connecting portion that protrudes rightward from the right end of the front wall portion 52 of the engaged portion 5. That is, the upper and lower fixing members 60, 60 that constitute the right fixing portion 6R are provided so as to extend rearward from the rear surface 55b of the right-side extended front wall portion 55R, which serves as a connecting portion with the engaged portion 5, passing beside the outer surface 53f of the right wall portion 53R. In other words, when the receiving member 2 is installed on the edge surface 11 side of the deck slab 10, the left and right fixing portions 6L, 6R are each composed of upper and lower fixing members 60, 60 arranged at a predetermined interval in the thickness direction of the deck slab 10. The anchoring member 60 is made of a steel material such as a reinforcing bar having a protrusion on the outer periphery of a rod-shaped body having a circular cross section.

[0019] That is, the receiving member 2 has a left-side extended front wall portion 55L and a right-side extended front wall portion 55R as connecting portions connecting the engaged portion 5 and the fixed portion 6, and is configured so that the left fixed portion 6L and the front wall portion 52 of the engaged portion 5 are integrated via the left-side extended front wall portion 55L, and so that the right fixed portion 6R and the front wall portion 52 of the engaged portion 5 are integrated via the right-side extended front wall portion 55R. Furthermore, the left-side extended front wall portion 55L is arranged to protrude to the left from the entire area between the top and bottom of the left end of the front wall portion 52, and the right-side extended front wall portion 55R is arranged to protrude to the right from the entire area between the top and bottom of the right end of the front wall portion 52.

[0020] The material of the receiving member 2 is not particularly limited, but for example, it is made of a one-piece molded product such as steel, in which cast iron is poured into a formwork not shown in the figure, and the engaging portion 5, the connecting portion which is the left-side extended front wall portion 55L and the right-side extended front wall portion 55R, and the fixing portion 6 are molded as one piece. In the case of a receiving member 2 constructed as an integrally molded product, the upper and lower fixing members 60, 60 constituting the left fixing portion 6L are integrally molded with the left extended front wall portion 55L and are arranged so as to protrude rearward from the rear surface 55b of the left extended front wall portion 55L and extend rearward, passing alongside the outer surface 53f of the left wall portion 53L, while the upper and lower fixing members 60, 60 constituting the right fixing portion 6R are integrally molded with the right extended front wall portion 55R and are arranged so as to protrude rearward from the rear surface 55b of the right extended front wall portion 55R and extend rearward, passing alongside the outer surface 53f of the right wall portion 53R.

[0021] The engaging portion 7 of the connecting member 3 is configured, for example, to have an outer peripheral wall facing the inner peripheral wall of the engaging recess 4, and is provided with a fixing portion 72 having an outer wall surface 71 on the front surface of the rear wall portion 54 facing the rear inner wall surface of the engaging recess 4 and the left and right inner wall surfaces of the engaging recess 4, which are the inner surfaces of the left and right wall portions 53L, 53R, and a wall portion 74 having an inner wall surface 73 facing the front inner wall surface 52b of the engaging recess 4 on the rear surface of the front wall portion 52. The fixing portion 72 of the engaging portion 7 is formed with a bolt insertion hole 75 for fixing the fixing portion 72 to the bottom portion 51 of the engaged portion 5 with a fixing means such as a bolt (not shown). It should be noted that the fixing portion 72 and the bolts used as fixing means may not be used. For example, the configuration may be such that the engaging portion of the connecting member and the engaged portion of the receiving member are fixed by using, as a fixing means, a wedge-shaped fitting member (not shown) that is fitted between the front inner wall surface of the engaging recess of the engaged portion and the inner wall surface of the wall portion of the engaging portion of the connecting member; in short, any configuration is acceptable as long as it is possible to fix the engaging portion of the connecting member and the engaged portion of the receiving member.

[0022] Next, the deck slab joint device 1A will be described with reference to FIG. The deck joint device 1A may be a deck joint device having a different configuration of the fixing part compared to the above-mentioned deck joint device 1, such as one having the same configuration as the deck joint device disclosed in Patent Document 1. The deck joint device 1A, like the above-mentioned deck joint device 1, is a deck joint device for connecting one deck slab 10 and another deck slab 10 that are installed adjacent to each other on the girder of a bridge, and is a deck joint device that is configured, for example, with one receiving member 2A as a joint component such as a C-shaped metal that is provided on one deck slab 10, the other receiving member 2A as a joint component such as a C-shaped metal that is provided on the other deck slab 10, and a connecting member 3A such as an H-shaped metal that connects these receiving members 2A, 2A. The receiving member 2A is configured to include an engaged portion 5A having an engaging recess 4, and an anchoring portion 6A that is anchored to the concrete of the deck slab 10 in order to anchor the engaged portion 5A to the concrete of the deck slab 10. The connecting member 3A has one engaging portion 7 that engages with the engaging recess 4 of one receiving member 2A, the other engaging portion 7 that engages with the engaging recess 4 of the other receiving member 2A, and a connecting portion 8 that connects the one engaging portion 7 and the other engaging portion 7. The engaged portion 5A comprises a front wall portion 52, a left wall portion 53L extending rearward from the front wall portion 52, a right wall portion 53R extending rearward from the front wall portion 52, a bottom portion 51 extending rearward from the front wall portion 52, and a rear wall portion 54 extending from the rear ends of the bottom portion 51, the left wall portion 53L, and the right wall portion 53R, and is configured with an upper-opening engaging recess 4 surrounded by the front wall portion 52, the left wall portion 53L, the right wall portion 53R, the bottom 51, and the rear wall portion 54. The fixing portion 6A is configured, for example, by comprising two fixing members 60A, 60A such as fixing reinforcements protruding from the left and right end sides of the rear surface of the rear wall portion 54 of the engaged portion 5A and spaced apart in a direction (horizontal (left and right) direction) H along the plate surface of the deck slab 10, and an end connecting member 60B connecting the ends of these fixing members 60A, 60A. Furthermore, as described above, the receiving member 2A has the fixing members 60A, 60A arranged rearward of the rear wall portion 54, and there are no fixing members on the outer surface side of the left wall portion 53L and the outer surface side of the right wall portion 53R of the receiving member 2A, so the adhesion force between the left wall portion 53L and the right wall portion 53R of the receiving member 2A and the concrete of the deck slab 10 is small.Therefore, in order to increase the adhesion force between the left wall portion 53L and the right wall portion 53R of the receiving member 2A and the concrete of the deck slab 10, a number of uneven portions 59, 59... are provided on the outer surfaces of the left wall portion 53L and the right wall portion 53R of the receiving member 2A. Furthermore, by providing the uneven portions 59, 59, the punching shear resistance can be improved.

[0023] The receiving members 2A, 2A of the deck joint device 1A are formed, for example, from a one-piece molded product in which the engaged portion 5A and the fixing portion 6A are molded integrally by pouring cast iron into a formwork, and the connecting member 3A is formed, for example, from a one-piece molded product in which the pair of engaging portions 7, 7 and the connecting portion 8 are molded integrally by pouring cast iron into a formwork. In the deck slab joint device 1A in Fig. 8, the same or corresponding parts as those in the deck slab joint device 1 in Fig. 7 are given the same reference numerals, and detailed explanations thereof will be omitted. That is, in the deck slab joint device 1A in Fig. 8, other than 2A, 3A, and 5A, the members given the same reference numerals as those in the deck slab joint device 1 in Fig. 7 have the same or corresponding configurations as those described in the deck slab joint device 1 in Fig. 2, and therefore detailed explanations thereof will be omitted. That is, as the deck slab joint device 1A, a deck slab joint device having a configuration similar to that of the deck slab joint device 1 other than the outer shape of the fixing portion 6A and the engaged portion 5A of the receiving member 2A may be used.

[0024] In the deck joint structure shown in Figures 1 and 2, the deck slab 10 has adjacent edge surfaces 11 and 11, each of which is bounded by a corner edge 10E, and near the corner edge of one edge surface 11 is provided with a receiving member 2A for connecting to the adjacent deck slab along the bridge axis direction X of the bridge, and near the corner edge of the other edge surface 11 is provided with a receiving member 2 for connecting to the adjacent deck slab along the direction Y perpendicular to the bridge axis of the bridge, and as shown in Figures 2 and 3, the fixing members 60A, 60A of the receiving member 2A provided near the corner edge of one edge surface 11 and the fixing members 60, 60 of the receiving member 2 provided near the corner edge of the other edge surface 11 intersect. In other words, when the deck slab 10 is viewed from within the deck slab 10 in a direction perpendicular to the board surface of the deck slab 10, the fixing member 60A of the receiving member 2A provided near the corner edge of one edge surface 11 intersects with the fixing member 60 of the receiving member 2 provided near the corner edge of the other edge surface 11.

[0025] Furthermore, as shown in Figure 3, the fixing member 60A of the receiving member 2A of the deck slab joint device 1A provided near the corner edge of one edge surface 11 extends in a direction perpendicular to the one edge surface 11, and the fixing member 60 of the receiving member 2 of the deck slab joint device 1 provided near the corner edge of the other edge surface 11 is provided so as to extend in a direction perpendicular to the other edge surface 11. Furthermore, as shown in Figure 3, the fixing portion 6 of the receiving member 2 of the deck slab 10 is configured to include upper left and right fixing members 60, 60 arranged on the upper and lower sides in the thickness direction of the deck slab 10 and lower left and right fixing members 60, 60, and the fixing portion 6A of the receiving member 2A is configured to include left and right fixing members 60A, 60A arranged on the left and right sides in the direction along the board surface of the deck slab 10. Furthermore, by arranging the left and right fixing members 60A, 60A of the receiving member 2A between the upper and lower fixing members 60, 60 of the receiving member 2, the fixing members 60 of the receiving member 2 and the fixing members 60A of the receiving member 2A are configured to intersect at upper and lower positions. In other words, when the deck slab 10 is viewed from within the deck slab 10 in a direction perpendicular to the board surface of the deck slab 10, the fixing member 60A of the receiving member 2A provided near the corner edge of one edge surface 11 and the fixing member 60 of the receiving member 2 provided near the corner edge of the other edge surface 11 are configured to intersect in a cross shape.

[0026] Furthermore, since the left and right fixing members 60A, 60A that constitute the fixing portion 6A of the receiving member 2A are positioned between the upper and lower fixing members 60, 60 that are spaced apart in the vertical direction and that constitute the fixing portion 6A of the receiving member 2, the distance between the upper and lower fixing members 60, 60 of the receiving member 2 is set to be larger than the dimension V of the fixing portion 6A of the receiving member 2A in the thickness direction (vertical direction) of the deck slab 10 (the vertical cross-sectional height dimension required for the fixing portion 6A).

[0027] The deck 10 is manufactured, for example, as follows. For example, when manufacturing the deck 10 shown in Figure 3, rebars and the like to be embedded in the deck 10 are placed in a deck forming formwork not shown, and multiple receiving members 2, 2... are placed in predetermined positions in the deck forming formwork so that the front wall surface 52a of the front wall portion 52, left-side extended front wall portion 55L, and right-side extended front wall portion 55R of the engaged portion 5 and the other edge surface 11 of the deck 10 extending in the bridge axis direction X are positioned, for example, on the same plane, and so that the connecting portion insertion groove 42 and the engaging portion insertion opening 41 of the engaging recess 4 are exposed to the outside of the deck 10. In other words, the multiple receiving members 2, 2... are placed at predetermined intervals along the other edge surface 11 of the deck 10 extending in the bridge axis direction X. Similarly, a plurality of receiving members 2A, 2A . . . are arranged at predetermined intervals along one edge surface 11 of the deck slab 10 that extends in the direction Y perpendicular to the bridge axis. Furthermore, within the deck slab forming formwork, a core, for example, is placed at a position where the recess 90 is to be formed. Thereafter, concrete is poured into the deck forming formwork and allowed to harden, thereby completing the deck slab 10, which has a plurality of receiving members 2A, 2A... spaced at predetermined intervals along one edge surface 11, and a plurality of receiving members 2, 2... spaced at predetermined intervals along the other edge surface 11, and has recesses 90 formed at the corners. That is, a plurality of receiving members 2, 2... are installed in the deck slab forming formwork so that the front wall surface 52a of the front wall portion 52 of the engaged portion 5, the connecting portion insertion groove 42 of the engaging recess 4, the engaging portion insertion opening 41, and the engaging recess 4 are exposed to the outside, and the other portions of the engaged portion 5 and the fixing portion 6 are embedded in the concrete of the deck slab 10, and a plurality of receiving members 2A, 2A... are also installed, and after a core is installed in a position where the recess 90 is to be formed, concrete is poured into the deck slab forming formwork and allowed to harden, thereby forming a deck slab 10 in which the receiving members 2A, 2A... are installed on one edge surface 11 side and the receiving members 2, 2... are installed on the other edge surface 11 side, and which has recesses 90 at the corner portions.

[0028] In other words, the receiving member 2 is fixed to the concrete of the deck slab 10 by an anchoring portion 6 which has a plurality of anchoring members 60, 60 arranged at intervals in the thickness direction (vertical direction) V of the deck slab 10 and a plurality of anchoring members 60, 60 arranged at intervals in the direction (horizontal (left-right) direction) H along the plate surface of the deck slab 10. In other words, the fixing portion 6 of the receiving member 2 that is fixed to the concrete of the deck slab 10 is configured to have two sets of two upper and lower fixing members 60, 60 arranged at a predetermined distance in the thickness direction (up and down direction) V of the deck slab 10, and two sets of two left and right fixing members 60, 60 arranged at a predetermined distance in the direction H along the board surface of the deck slab 10, in other words, two sets of two left and right fixing members 60, 60 arranged at a predetermined distance in the direction H along the board surface of the deck slab 10, and two sets of two left and right fixing members 60, 60 arranged at a predetermined distance in the thickness direction V of the deck slab 10. In addition, the receiving member 2A is fixed to the concrete of the deck slab 10 by an anchoring portion 6A which comprises anchoring members 60A, 60A such as two anchoring reinforcements arranged at a distance in the direction (horizontal (left-right) direction) H along the plate surface of the deck slab 10 and an end connecting member 60B.

[0029] The deck joint structure in which the above-mentioned deck slabs 10 are installed on the girders so that they are adjacent to each other in the bridge axis direction X and the direction perpendicular to the bridge axis Y of the bridge via joints 16, 15, and the deck slabs 10, 10... are connected to each other by deck joint devices, is as follows. For example, as shown in Figures 1 and 2, one receiving member 2A of a deck joint device 1A provided on one edge surface 11 of one adjacent deck slab 10 along the bridge axis direction X of the bridge and the other receiving member 2A of the deck joint device 1A provided on one edge surface 11 of the other deck slab 10 are connected by a connecting member 3A. Furthermore, one receiving member 2 of the deck joint device 1 provided on the other edge surface 11 side of one adjacent deck slab 10 along the direction Y perpendicular to the bridge axis of the bridge and the other receiving member 2 of the deck joint device 1 provided on the one edge surface 11 side of the other deck slab 10 are connected by a connecting member 3.

[0030] In other words, the edge surfaces 11, 11 of adjacent deck slabs 10, 10, 10, 10 are arranged adjacent to each other with gaps forming joints 16, 15, and then the adjacent deck slabs 10 are connected using deck slab joint devices 1, 1A to form a corner collection portion 10C.Furthermore, a reinforcing portion 9 of the corner collection portion 10C is formed, and the deck slab joint structure between adjacent deck slabs 10 and 10 is completed by filling the joints 16, 15 above the deck slab joint devices 1, 1A and between the edge surfaces 11, 11 of each adjacent deck slab 10, 10 with filler 17.

[0031] That is, when half-section construction (lane-specific deck replacement work) is carried out using the above-mentioned deck slab 10, as shown in Figure 1, for example, a one-phase construction is carried out in which the deck slabs 10, 10... for travel lane D are lined up and connected along the bridge axis direction (vehicle travel direction) X. In this first phase of construction, each receiving member 2A, 2A, which is arranged so as to face each other on the opposing edge surfaces 11, 11 of adjacent deck slabs 10, 10, is connected by a connecting member 3A via a joint 16 along the bridge axis direction X (see Figure 2). That is, the engaging portions 7, 7 of the connecting member 3A are inserted into the engaging recesses 4, 4 from above the engaging recesses 4, 4 of the engaged portions 5A, 5A of the opposing receiving members 2A, 2A through the engaging portion insertion openings 41 at the top of the engaging recesses 4, 4, and the connecting portions 8 of the connecting member 3A are inserted into the connecting portion insertion grooves 42 of the engaging recesses 4, 4, so that the pair of engaging portions 7, 7 are fitted into the engaging recesses 4, 4 (see Figure 8(b)). Furthermore, for example, by inserting a bolt as a fixing means into the bolt insertion hole 75 of the engaging portion 7 fitted into the engaging recess 4, and fastening the bolt into a screw hole (not shown) formed in the bottom 51, the engaging portion 7 of the connecting member 3A and the engaged portion 5A of the receiving member 2A are fixed together. That is, in the one-phase construction, for example, one receiving member 2A described below installed on the edge surface 11 side of one adjacent deck slab 10 along the bridge axis direction X and the other receiving member 2A installed on the edge surface 11 side of the other adjacent deck slab 10 are connected by a connecting member 3A, and thus the one deck slab 10 and the other deck slab 10 arranged adjacent to each other along the bridge axis direction X are connected by a deck slab joint device 1A. As a result of the above, the adjacent deck slabs 10, 10 are connected to each other via the joints 16 along the bridge axis direction X by the deck slab joint device 1A. Then, after the adjacent deck slabs 10, 10 are connected along the bridge axis direction X by the deck joint device 1A, filler 17 is filled above the fixed connecting member 3A, and filler is filled into the joints 16, which are the gaps between the end faces of the adjacent deck slabs 10, 10, thereby completing the deck joint structure between the adjacent deck slabs 10, 10. Similarly, the deck slabs 10, 10... for the travel lane D are installed and joined in sequence so as to be adjacent to each other via joints 16 along the bridge axis direction X, thereby completing the first phase of construction.

[0032] After the first phase of construction is completed, a second phase of construction is carried out in which, for example, the deck slabs 10, 10... for the passing lane P are lined up and connected along the bridge axis direction (vehicle travel direction) X. In the second phase of construction, the deck slabs 10 are sequentially arranged in the bridge axis direction X, separated by joints 16, so that they are adjacent to each other along the bridge axis transverse direction Y via the joints 15 of each deck slab 10, 10 installed in the first phase of construction. The deck slabs 10, 10 adjacent to each other along the bridge axis direction X are connected using, for example, a deck joint device 1A, and the joints 16 between these adjacent deck slabs 10, 10 are filled with a filler, thereby completing the deck slab joint structure between the adjacent deck slabs 10, 10. The second phase of construction is completed.

[0033] After the second phase of construction is completed, each deck slab 10, 10... installed in the first phase of construction is connected to the deck slabs 10, 10... installed in the second phase of construction using, for example, a deck joint device 1, and then filler is filled into the joints 15 between the deck slabs 10 installed in the first phase of construction and the deck slabs 10 installed in the second phase of construction, thereby completing the deck joining work between the deck slabs 10, 10... installed in the first phase of construction and the deck slabs 10, 10... installed in the second phase of construction, i.e., the deck joining work between the decks perpendicular to the bridge axis. In this case, the engaging portions 7,7 of the connecting member 3 are inserted into the engaging recesses 4,4 from above the engaging recesses 4,4 of the engaged portions 5,5 of the opposing receiving members 2,2 through the engaging portion insertion openings 41 at the top of the engaging recesses 4,4, and the connecting portions 8 of the connecting member 3 are inserted into the connecting portion insertion grooves 42 of the engaging recesses 4,4, so that the pair of engaging portions 7,7 are fitted into the engaging recesses 4,4 (see Figure 7(b)). Furthermore, for example, by inserting a bolt as a fixing means into the bolt insertion hole 75 of the engaging portion 7 fitted into the engaging recess 4, and fastening the bolt into a screw hole (not shown) formed in the bottom 51, the engaging portion 7 of the connecting member 3 and the engaged portion 5 of the receiving member 2 are fixed together.

[0034] When carrying out half-section construction, for example, as mentioned above, construction will be carried out in the following order: first phase construction → second phase construction → deck slab joint construction perpendicular to the bridge axis. Furthermore, when carrying out half-section construction, after the first phase of construction, the second phase of construction and the construction of the deck slab joints perpendicular to the bridge axis may be carried out together.

[0035] In other words, when carrying out half-section construction, depending on the situation at the site, construction can be carried out in the following order, as described above: first phase construction → second phase construction → inter-slab joint construction perpendicular to the bridge axis, or, after the first phase construction is completed, construction of the second phase construction and inter-slab joint construction perpendicular to the bridge axis can be carried out together.

[0036] In the half section construction described above, as shown in Figures 1 and 2, the corners of the four deck slabs 10, 10... are adjacent to each other via joints 15, 16 to form a corner assembly portion 10C. In the deck slab joint structure according to the first embodiment, in order to improve the shear load-bearing capacity of each corner in the corner assembly 10C, the corner assembly 10C is provided with a reinforcing portion 9.

[0037] Next, a method for constructing the reinforcing portion 9 will be described. In the above-described half cross-section construction, the reinforcing material 91 is installed in a state of being suspended by a suspension means, for example, so that the reinforcing material 91 extends across the four recesses 90 of the corner convergence portion 10C. 6, the hanging means is made up of a support member 93 and a hanging material 94. For example, a weight is used as the support member 93, and a hanging string is used as the hanging material 94. One end of the hanging material 94 is connected to the through-hole 92 of the reinforcing material 91 , and the other end of the hanging string is connected to the support member 93 . In other words, as shown in Figure 6, the support member 93 is installed so that it is positioned on the plate surface (upper plate surface) of the deck slabs 10, 10... around the intersection of the joints 15, 16 at the corner collection portion 10C, so that the reinforcing member 91 is suspended by the hanging member 94 and extends across each of the four recesses 90 at the corner collection portion 10C.

[0038] Then, a filler 17 is filled into each of the four recesses 90 and the joints 15, 16 at the corner convergence portion 10C. Furthermore, when the filler 17 is filled into each of the four recesses 90 and into the joints 15, 16 at the corner collection portion 10C, the air that has accumulated on the underside of the reinforcing material 91 escapes upward through the air vent through holes 92, making it less likely that air will accumulate on the underside of the reinforcing material 91. Then, after the filling of the filler 17 into each of the four recesses 90 and into the joints 15, 16 at the corner collection portion 10C has been completed and the filler 17 has lost its fluidity and is now in a state where it can support the reinforcing material 91, the hanging material 94 is cut and the support member 93 is removed. As a result of the above, a deck slab joint structure according to embodiment 1 is constructed, which has a reinforcing portion 9 at the corner assembly portion 10C where four adjacent deck slabs 10, 10, 10, 10 are joined together via joints in the bridge axis direction X and the direction perpendicular to the bridge axis Y.

[0039] A rod may be used as the hanging member 94 described above. Furthermore, an installation means for the reinforcing member 91 may be provided on the wall surface of the recess 90 without using the hanging member 94. The installation means for the reinforcing member 91 may be, for example, a protrusion formed on the wall surface of the recess 90, a temporary mounting bracket provided on the wall surface of the recess 90, or a groove formed on the wall surface of the recess 90, and the reinforcing member 91 may be installed on the installation means.

[0040] In the above-mentioned first-phase construction, when filling material 17 is filled into joints 16 and each recess 90, 90 of adjacent deck slabs 10, 10 along the bridge axis direction, formwork is installed at a position that marks the boundary between the first-phase construction area and the second-phase construction area to prevent the filler material 17 from flowing into the second-phase construction area. At this time, installation holes may be made in the formwork and reinforcing material 91 may be installed in the installation holes, or the reinforcing material 91 may be installed by sandwiching it between upper and lower formwork so that half of the reinforcing material 91 is positioned within each recess 90, 90 of adjacent deck slabs 10, 10 along the bridge axis direction X. In this way, the filler 17 filled in the joints 16 is filled into each recess 90, 90 of adjacent deck slabs 10, 10 along the bridge axis direction X, and after the filler 17 has hardened, the formwork is removed, and the reinforcing material 91 is fixed and supported by the filler 17 filled into each recess 90. Then, in the secondary construction work, by filling the joints 15 between the deck slabs 10, 10 arranged along the direction perpendicular to the bridge axis Y and the joints 16 between the deck slabs 10, 10 arranged along the bridge axis direction X with filler 17, the filler 17 is filled into each recess 90 of each deck slab 10, 10 arranged along the bridge axis direction X, and a deck slab joint structure according to embodiment 1 having reinforcing materials 91 in each recess 90, 90... of the corner assembly portion 10C is constructed. In this way, by installing the reinforcing material 91 in the formwork so that it is positioned within each of the recesses 90, 90, the installation work of the reinforcing material 91 becomes easy.

[0041] As explained above, according to the deck slab joint structure of embodiment 1, the corner assembly 10C where the corners of four adjacent decks 10 are adjacent to each other via joints 16, 15 in the bridge axis direction X and the direction perpendicular to the bridge axis Y is provided with a reinforcement section 9. This improves the shear load-bearing capacity of each corner of each deck slab 10, 10... at the corner assembly 10C, and makes it possible to provide a deck slab joint structure that can suppress punching shear failure due to fatigue at each corner of each deck slab 10, 10... at the corner assembly 10C.

[0042] That is, according to the conventional deck joint structure, as shown in Figure 9(a), the corners of four decks 10X, 10X... that are installed adjacent to each other with joints in the bridge axis direction X and the direction perpendicular to the bridge axis Y are not provided with reinforcement at the corner assembly where the corners are adjacent to each other with joints in between, so the shear force sf due to the wheel load W applied to the corner assembly is resisted by the adhesive force between the concrete at the corners of the deck slabs 10X and the filler 17 filled in the joints. This has led to the risk of punching shear failure due to fatigue at each corner of each deck slab 10X, 10X... at the corner assembly. On the other hand, according to the deck joint structure of the first embodiment, as shown in FIG. 9(b), the four decks 10, 10... are installed adjacent to each other in the bridge axis direction X and the direction perpendicular to the bridge axis Y via joints 16, 15. The corners of the four decks 10, 10... are adjacent to each other via the joints 16, 15 at the corner assembly 10C. This structure provides resistance to the shear force sf due to the wheel load W applied to the corner assembly 10C by the adhesion of the concrete at the corners of the decks 10 and the shear force of the filler 17 filled in the joints, as well as by the reinforcement 9 (recesses 90, reinforcing materials 91 in the recesses 90, and filler 17 in the recesses 90). This improves the shear load-bearing capacity of each corner of the decks 10, 10... at the corner assembly 10C, and provides a deck joint structure that can suppress punching shear failure due to fatigue at each corner of the decks 10, 10... at the corner assembly 10C.

[0043] Furthermore, according to the deck slab 10, as shown in Figures 2 and 3, between one edge surface 11 and the other edge surface 11 adjacent to each other with a corner edge 10E of the rectangular plate-shaped deck slab 10 as the boundary, a receiving member 2A is provided near the corner edge 10E of one edge surface 11, and a receiving member 2 is provided near the corner edge 10E of the other edge surface 11, so that the fixing members 60A, 60A constituting the fixing portion 6A of the receiving member 2A and the fixing members 60, 60 constituting the fixing portion 6 of the receiving member 2 intersect. That is, the deck 10 according to the first embodiment has, in one edge surface 11 and the other edge surface 11 adjacent to each other with a corner edge 10E as a boundary, a receiving member 2A as a joint component member for connecting to the adjacent deck 10 along the bridge axis direction X of the bridge near the corner edge of one edge surface 11, and a receiving member 2 as a joint component member for connecting to the adjacent deck 10 along the bridge axis perpendicular direction Y of the bridge near the corner edge of the other edge surface 11, and the receiving member 2 is The deck slab 10 is provided with upper and lower fixing members 60, 60 positioned at the upper and lower sides in the plate thickness direction, and the receiving member 2A is provided with a fixing member 60A positioned between the upper and lower fixing members 60, 60 of the receiving member 2.As a result, as shown in Figure 3, in the vicinity of the corner edge 10E, it is possible to shorten the distance L1 from the corner edge 10E of the deck slab 10 to the position where the receiving member 2 is installed, and the distance L2 from the corner edge 10E of the deck slab 10 to the position where the receiving member 2A is installed. Furthermore, as shown in Figure 2, at the corner assembly portion 10C, it is possible to shorten the distance M1 between the support members 2 and 2 provided near the corner edges 10E, 10E of each deck slab 10, 10 lined up along the bridge axis direction X via joints 16, and the distance M2 between the support members 2A and 2A provided near the corner edges 10E, 10E of each deck slab 10, 10 lined up along the bridge axis perpendicular direction Y via joints 15. Therefore, at the corner assembly portion 10C, cracks are less likely to occur in the corners and joints 15, 16 of each deck slab 10, 10..., improving the crack suppression effect, durability, and load-bearing capacity of each corner and joint 15, 16 of each deck slab 10. In other words, according to embodiment 1, a deck slab 10 can be provided that has improved crack suppression effect, durability, load-bearing capacity, etc. at the corners, and even when a corner assembly 10C is formed by the corners of four deck slabs 10, 10..., it is possible to realize a deck slab joining structure that has improved crack suppression effect, durability, load-bearing capacity, etc. at each corner and joint 15, 16 of each deck slab 10, 10... that constitutes the corner assembly 10C.

[0044] Furthermore, since the receiving member 2 is configured with upper and lower fixing members 60, 60 spaced apart in the thickness direction V of the deck slab 10, the deck slab 10 can be designed separately for resistance to bending stress and resistance to shear force. For example, in order to improve punching shear resistance, it is preferable to place the anchoring member 60 at a position far from the lower surface of the deck slab 10 (at a position close to the upper surface of the deck slab 10). Therefore, of the upper and lower anchoring members 60, 60 spaced apart in the thickness direction V of the deck slab 10, the upper anchoring member 60 can be designed to be optimally positioned to resist shear forces, thereby improving punching shear resistance. Furthermore, of the upper and lower fixing members 60, 60 spaced apart in the thickness direction V of the deck slab 10, the lower fixing member 60 can be designed to be optimally positioned to resist bending stress, thereby improving bending stress resistance. In other words, since the deck slab 10 is provided with a support member 2 having upper and lower fixing members 60, 60 near the corner edge of the other edge surface 11, it is possible to realize an appropriate design for resisting both bending stress and shear force at the corner of the deck slab 10.

[0045] As described above, according to the deck slab joining structure of embodiment 1, a reinforcing portion 9 is provided at the corner assembly portion 10C, thereby making it possible to improve the shear load-bearing capacity at each corner portion of each deck slab 10, 10... at the corner assembly portion 10C. Furthermore, at the corners of each deck slab 10, 10..., the fixing members 60A, 60A that constitute the fixing portion 6A of the receiving member 2A and the fixing members 60, 60 that constitute the fixing portion 6 of the receiving member 2 are configured to intersect, so the above-mentioned separation distance L1, separation distance L2, spacing M1, and spacing M2 can be shortened, making it possible to realize a deck slab joining structure that improves the crack suppression effect, durability, and load-bearing capacity of each corner and joint 15, 16 of each deck slab 10, 10... that constitutes the corner assembly portion 10C.

[0046] In addition, in embodiment 1, an example of a deck slab joining structure is shown in which adjacent deck slabs 10 along the direction Y perpendicular to the bridge axis are connected using the deck slab joint device 1 shown in Figure 7, and adjacent deck slabs 10 along the bridge axis direction X are connected using the deck slab joint device 1A shown in Figure 8.However, the deck slab joining structure may also be such that adjacent deck slabs 10 along the direction Y perpendicular to the bridge axis are connected using the deck slab joint device 1A shown in Figure 8, and adjacent deck slabs 10 along the bridge axis direction X are connected using the deck slab joint device 1 shown in Figure 7. Furthermore, the slab joint structure may be one in which only the slab joint device 1 is used as the slab joint device, or one in which only the slab joint device 1A is used as the slab joint device.

[0047] Furthermore, when only the above-mentioned deck joint device 1 is used as the deck joint device, the deck is made of a square plate-shaped deck, and at one edge surface 11 and the other edge surface 11 adjacent to each other with the corner edge 10E as the boundary, each receiving member 2,2 installed near the corner edge 10E must be installed at a necessary and sufficient distance from the corner edge 10E so that the fixing members 60,60 of each receiving member 2,2 do not come into contact with and interfere with each other. Furthermore, even if only the above-mentioned deck joint device 1A is used as the deck joint device, at one edge surface 11 and the other edge surface 11 adjacent to each other with the corner edge 10E of the square plate-shaped deck as the boundary, each receiving member 2, 2 installed near the corner edge 10E must be installed at a necessary and sufficient distance from the corner edge 10E so that the fixing members 60A, 60A of each receiving member 2A, 2A do not come into contact with and interfere with each other. In other words, in these cases, the distance from the corner edge 10E of the deck slab 10 to the position where the receiving member 2 and the receiving member 2A are installed must be increased near the corner edge 10E.However, in embodiment 1, the corner assembly 10C is provided with a reinforcing portion 9, so even when a deck slab joint structure is constructed using a deck slab 10 in which the distance from the corner edge 10E of the deck slab 10 to the position where the receiving member 2 and the receiving member 2A are installed near the corner edge 10E must be increased, it is possible to provide a deck slab joint structure that can improve the shear load-bearing capacity at each corner of each deck slab 10, 10... at the corner assembly 10C.

[0048] Embodiment 2 As shown in Figure 10, the reinforcing portion 9 of the corner assembly portion 10C may be a reinforcing portion configured to include each recess 90 formed in each corner of the four deck slabs 10, 10, 10, 10 described above, a reinforcing material 95 installed in the joints between adjacent corners, and a filler material 17 filled in each recess 90 of each of the four deck slabs 10. The reinforcing member 95 is configured by a reinforcing plate such as a flat steel plate that is installed so that a plate surface 95f extends along the extension direction of the joint. In addition, Figure 10 shows a reinforcing part 9 configured such that a reinforcing material 95 is installed in the joint 15 between adjacent corners, but the reinforcing part 9 may also be configured such that a reinforcing material 95 is installed in the joint 16 between adjacent corners. That is, the reinforcing material 95 may be a plate material to be placed in the joint 16 or a plate material to be placed in the joint 15 . The reinforcing member 95 may be, for example, a quadrilateral (for example, square) flat plate with a through-hole 95a formed in the center of the plate surface, as shown in FIG. 10(c). Furthermore, the reinforcing material 95 may be, for example, a rectangular flat plate without through holes 95a formed therein, as shown in FIG. 10(b).

[0049] According to the deck joint structure of embodiment 2, the corner assembly 10C is configured to be equipped with the above-mentioned reinforcing portion 9, so that the shear force due to wheel load applied to the corner assembly 10C is resisted by the concrete at the corner of the deck 10 and the filler 17 filled in the joint, as well as by the reinforcing portion 9 (recess 90, reinforcing material 95 provided in the joint, filler 17 in the recess 90).This makes it possible to improve the shear load-bearing capacity at each corner of each deck slab 10, 10... at the corner assembly 10C, and makes it possible to provide a deck joint structure that can suppress punching shear failure due to fatigue at each corner of each deck slab 10, 10... at the corner assembly 10C.

[0050] Embodiment 3 When half-section construction is performed using the above-described deck slab 10, the installation position of the deck slab 10 may be shifted in the direction Y perpendicular to the bridge axis at curved sections of the road, as shown in FIG. In this case, for example, as shown in Figure 12, the vicinity of each corner edge of two deck slabs 10, 10 arranged adjacent to each other in the direction perpendicular to the bridge axis Y via joints 15 is connected by a deck slab joint device 1, and the vicinity of each corner edge of each of the two deck slabs 10, 10 is connected to one deck slab 10 arranged adjacent to each other in the bridge axis direction X via joints 16 by a deck slab joint device 1A, resulting in a deck slab joining structure. That is, in half-section construction, as shown in Figures 11 and 12, the corner portions of two deck slabs 10, 10 arranged adjacent to each other in the direction perpendicular to the bridge axis Y via joints 15 are configured to be adjacent to the edge surface portion of one deck slab 10 in the direction along the bridge axis direction X via joints 16. In other words, the corner portions of the two deck slabs 10, 10 and the edge surface portion of one deck slab 10 are adjacent to each other through the T-shaped joint portions, which are the intersecting joints 15, 16, and a corner collection portion 10D is formed where the corner portions of the two deck slabs 10, 10 are adjacent to each other through the joints 15. Therefore, in the deck slab joint structure of embodiment 3, in order to improve the shear load-bearing capacity of each corner in the corner assembly 10D, the corner assembly 10D is provided with a reinforcing portion 9.

[0051] As shown in Figures 11, 12 and 13(a), the reinforcing portion 9 of the corner assembly portion 10D in the deck slab joint structure of embodiment 3 is a reinforcing portion configured to include recesses 90 formed in each corner portion of two deck slabs 10, 10 arranged adjacent to each other in the direction Y perpendicular to the bridge axis via joints 15, a reinforcing material 91A arranged to extend within each recess 90 of each of the two deck slabs 10, and a filler material 17 filled in each recess 90 of each of the two deck slabs 10. The reinforcing material 91A is composed of a reinforcing plate such as a flat steel plate having a surface area slightly smaller than the cross-sectional area of ​​the recess for installing the reinforcing material, which is formed by combining two recesses 90 at the corner collection portion 10D, and is installed so that the surface of the reinforcing plate extends along the surface of the deck slab 10.

[0052] The reinforcing portion 9 of the corner assembly portion 10D in the deck slab joint structure of embodiment 3 may be a reinforcing portion configured as shown in Figure 13(b), including recesses 90 formed in each corner portion of two deck slabs 10, 10 arranged adjacent to each other in the direction perpendicular to the bridge axis Y via joints 15, recesses 90A formed in the edge surface 11 of one deck slab 10 arranged adjacent to each corner edge of the two deck slabs 10, 10 via joints 16 in the bridge axis direction X, reinforcing material 91B arranged to extend within each of these recesses 90, 90, 90A, and filler material 17 filled in each recess 90 of each of the two deck slabs 10. The reinforcing material 91B is composed of a reinforcing plate such as a flat steel plate having a surface area slightly smaller than the cross-sectional area of ​​the recess for installing the reinforcing material formed by combining the three recesses 90, 90, 90A at the corner assembly portion 10D, and is installed so that the surface of the reinforcing plate extends along the surface of the deck slab 10.

[0053] Furthermore, the reinforcing portion 9 of the corner assembly portion 10D in the deck slab joint structure of embodiment 3 may be a reinforcing portion configured as shown in Figure 14(a) including recesses 90 formed in each corner portion of two deck slabs 10, 10 arranged adjacent to each other in the direction perpendicular to the bridge axis Y via joints 15, a reinforcing material 95A installed in the joints 15 between adjacent corner portions, and a filler material 17 filled in each recess 90 of each of the two deck slabs 10.

[0054] Furthermore, the reinforcing portion 9 of the corner assembly portion 10D in the deck slab joint structure of embodiment 3 may be a reinforcing portion configured as shown in Figure 14(b), which includes recesses 90 formed in each corner portion of two deck slabs 10, 10 arranged adjacent to each other in the direction perpendicular to the bridge axis Y via joints 15, reinforcing material 95B installed in the joints 16 between the vicinity of each corner edge of each of the two deck slabs 10, 10 and one deck slab 10 adjacent to it in the bridge axis direction X, and filler material 17 filled in each recess 90 of each of the two deck slabs 10.

[0055] Reinforcing material 95A is composed of a reinforcing plate such as a flat steel plate installed so that the plate surface extends along the extension direction of joint 15, and reinforcing material 95B is composed of a reinforcing plate such as a flat steel plate installed so that the plate surface extends along the extension direction of joint 16.

[0056] Also, although not shown, the reinforcing portion 9 of the corner assembly portion 10D in the deck slab joint structure of embodiment 3 may be configured to include a plate material installed in at least one of the joints 15 or 16 shown in Figure 14, and a recess 90A shown in Figure 13(b) (i.e., a recess 90A formed in the edge surface 11 of one deck slab 10 arranged adjacent to each corner portion of each of the two deck slabs 10, 10 in the bridge axis direction X via the joint 16).

[0057] According to the deck joint structure of embodiment 3, the corner assembly 10D is configured to have a reinforcing portion 9, so in the deck joint structure in which the corner assembly 10D is formed, which is the portion near the corner edge of two decks 10, 10 arranged adjacent to each other in the direction Y perpendicular to the bridge axis via a joint 15, and the edge surface 11 portion of one deck slab 10 adjacent to the portion near the corner edge of each of the two decks 10, 10 via a joint 16, as in embodiments 1 and 2, the shear load-bearing capacity of each corner of each deck slab 10, 10 in the corner assembly 10D can be improved, and a deck joint structure can be provided that can suppress punching shear failure due to fatigue at each corner of each deck slab 10, 10 in the corner assembly 10D.

[0058] Embodiment 4 As shown in Figure 15, the reinforcing portion 9 of the corner assembly portion 10D in the deck slab joint structure of embodiment 4 may be configured to include a plate-shaped reinforcing member 97 with a T-shaped cross section that combines the above-mentioned reinforcing members 95A and 95B. That is, as a reinforcing material to be installed in both joints 15 and 16 at the corner assembly portion 10D, a plate-shaped reinforcing material 97 having a T-shaped cross section as shown in Figure 15(b) is provided, which extends in the vertical direction of both joints 15 and 16. In other words, the reinforcing portion 9 of the corner assembly 10D in the deck slab joint structure of embodiment 4 is configured as shown in Figure 15(a) to include recesses 90 formed in each corner of two deck slabs 10, 10 arranged adjacent to each other in the direction Y perpendicular to the bridge axis via joints 15, reinforcing members 97 with a T-shaped cross section installed in both the joints 15 and 16 in the corner assembly 10D, and filler material 17 filled in each recess 90 of each of the two deck slabs 10. Furthermore, the reinforcing portion 9 of the corner assembly portion 10D in the deck slab joint structure according to the fourth embodiment may be configured to include the recess 90A shown in FIG. 13(b) in addition to the configuration shown in FIG. 15(a). The reinforcing member 97 may have a structure in which through holes 97a are formed in the center of the plate surfaces of three T-shaped plate portions, as shown in FIG. 15(b), for example. The reinforcing material 97 may not have the through-holes 97a formed therein.

[0059] Embodiment 5 The reinforcing plates constituting the reinforcing members 91, 91A, 91B, 95, 95A, 95B, and 97 may be reinforcing plates having a plurality of through holes penetrating the plate surface.

[0060] Embodiment 6 As the reinforcing plates constituting the reinforcing members 91, 91A, 91B, 95, 95A, 95B, and 97 described above, reinforcing plates having irregularities on the plate surface may be used.

[0061] If reinforcing plates having the configurations according to embodiments 5 and 6 are used as the reinforcing plates constituting the above-mentioned reinforcing members 91, 91A, 91B, reinforcing members 95, 95A, 95B, and reinforcing member 97, a deck slab joint structure can be provided that can further improve the bending strength against bending due to wheel load W and the shear load-bearing strength against shear force at the above-mentioned corner angle assembly portion 10C and corner angle assembly portion 10D.

[0062] In addition, in the deck joint structure according to each embodiment, an example has been shown in which a deck joint device 1, 1A is used that is configured to include one support member such as a C-shaped metal provided on one deck 10 that is arranged adjacent to the bridge girder, another support member such as a C-shaped metal provided on the other deck 10 that is arranged adjacent to the bridge girder, and a connecting member such as an H-shaped metal that connects the one support member and the other support member, but deck joint devices of other configurations may also be used as the deck joint device, for example, a deck joint device of the following configuration.

[0063] In other words, the deck joint device used in the deck joining structure of the present invention may be a deck joint device that includes a receiving member such as a C-shaped metal fitting provided on one deck that is installed adjacent to the bridge girder, and a connecting member such as a T-shaped metal fitting provided on the other deck that is placed adjacent to the bridge girder, and that connects adjacent decks together by engaging the connecting member with a recess in the receiving member. In other words, the deck joint device used in the deck joining structure of the present invention may be a deck joint device that is configured to include a receiving member as a joint component member provided on one deck slab, and a connecting member as a joint component member provided on the other deck slab and connected to the receiving member provided on one deck slab. In this case, the deck slab used in the deck slab joint structure of the present invention is a deck slab configured to include at least one of the above-mentioned receiving member and connecting member.

[0064] In addition, the deck joint device used in the deck joining structure of the present invention may be a deck joint device configured to include a receiving member as one joint component member having a recessed portion called a bolt box provided on one deck slab installed adjacent to the bridge girder, a receiving member as the other joint component member having a recessed portion called a bolt box provided on the other deck slab arranged adjacent to the bridge girder, and a connecting bolt installed across the one bolt box and the other bolt box as a connecting member connecting the one receiving member and the other receiving member. In this case, the deck slab used in the deck slab joint structure of the present invention is a deck slab configured to have a receiving member as a joint component member having a recess such as the above-mentioned bolt box.

[0065] In other words, when the deck joint device used in the deck joint structure of the present invention comprises a receiving member provided on one deck, a receiving member provided on the other deck, and a connecting member connecting these receiving members, and the receiving member is configured to have an engaged portion with which the connecting member engages, and an anchoring portion for anchoring the engaged portion to the concrete of the deck, the receiving member becomes the joint component member and the engaged portion becomes the joint functional portion. Furthermore, when the deck joint device used in the deck joint structure of the present invention is configured to include a receiving member provided on one deck and a connecting member provided on the other deck, and the receiving member has an engaged portion and a fixing portion for fixing the engaged portion to the concrete of the deck, and the connecting member has an engaging portion that engages with the engaged portion and a fixing portion for fixing the engaging portion to the concrete of the deck, then either the receiving member becomes the joint component member and the engaged portion becomes the joint functional portion, or the connecting member becomes the joint component member and the engaged portion becomes the joint functional portion.

[0066] In other words, the deck joint structure of the present invention may be a deck joint structure that uses a deck joint device other than the deck joint device 1 or the deck joint device 1A, such as a connecting member such as the above-mentioned T-shaped metal fitting or a receiving member such as a bolt box. In short, the deck joint structure of the present invention is a deck joint structure in which adjacent decks 10 along the bridge axis direction X and adjacent decks 10 along the direction perpendicular to the bridge axis Y are connected using deck joint devices to form corner assembly portions 10C and corner assembly portions 10D equipped with the above-mentioned reinforcing portions 9. In other words, if the corner assembly portions 10C and 10D are provided with the reinforcing portions 9, the desired effect of the present invention, that is, the shear load-bearing capacity of the corner assembly portions 10C and 10D can be improved, can be obtained.

[0067] Furthermore, the deck slab joint structure according to the present invention is applicable even when the installation position of the deck slab 10 is shifted in the bridge axis direction X. In this case, the corners of the two deck slabs 10, 10 arranged adjacent to each other in the bridge axis direction X via joints 16 are adjacent to the edge surface 11 of one deck slab 10 adjacent to the corners of the two deck slabs 10, 10 via joints 15, and a corner assembly portion is formed where the corners of the two deck slabs 10, 10 are adjacent to each other via joints 16, resulting in a deck slab joint structure with a reinforcing portion 9 at the corner assembly portion. In other words, the deck slab joining structure according to the present invention only needs to be provided with reinforcing portions that reinforce each of the opposing corner portions of each deck slab that is installed adjacent to each other with a joint interposed therebetween. [Explanation of symbols]

[0068] 1,1A Deck joint device 9 Reinforcement 10 Floor slab 10E Corner edge of deck 15,16 Joint 17 Filling material 90 recess 91, 91A, 91B, 95, 95A, 95B, 97 Reinforcement 92,95a,97a through hole X Bridge axis direction Y Direction perpendicular to bridge axis

Claims

1. A deck joint structure in which rectangular plate-shaped reinforced concrete deck slabs are installed on girders so that they are adjacent to each other via joints in the bridge axis direction and in the direction perpendicular to the bridge axis, and adjacent deck slabs are connected using deck joint devices, and the joints are filled with filler material. The deck is provided with a reinforcing portion that reinforces each of the opposing corner portions of each deck installed adjacent to each other via a joint, The reinforcement part is At each corner of each deck slab, a recess is provided extending from one edge surface to the other edge surface near the adjacent corner edge, with the corner edge as a boundary; a reinforcing member provided so as to extend across each recess; A deck slab joint structure characterized by a configuration comprising a filler material filled in each recess.

2. A deck joint structure in which rectangular plate-shaped reinforced concrete deck slabs are installed on girders so that they are adjacent to each other via joints in the bridge axis direction and in the direction perpendicular to the bridge axis, and adjacent deck slabs are connected using deck joint devices, and the joints are filled with filler material. The deck is provided with a reinforcing portion that reinforces each of the opposing corner portions of each deck installed adjacent to each other via a joint, The reinforcement part is At each corner of each deck slab, a recess is provided extending from one edge surface to the other edge surface near the adjacent corner edge, with the corner edge as a boundary; a reinforcing material installed in a joint between adjacent corners; A deck slab joint structure characterized by a configuration comprising a filler material filled in each recess.

3. 2. The deck slab joint structure according to claim 1, wherein the reinforcing material is constituted by a reinforcing plate installed so that its plate surface extends along the plate surface of the deck slab.

4. 3. The deck slab joint structure according to claim 2, wherein the reinforcing material is constituted by a reinforcing plate installed so that the plate surface extends along the extension direction of the joint.

5. A deck joint structure described in any one of claims 1 to 4, characterized in that the reinforcing portion is a reinforcing portion that reinforces each opposing corner portion of four decks arranged adjacent to each other via joints in the bridge axis direction and the direction perpendicular to the bridge axis of the bridge.

6. A deck joint structure described in any one of claims 1 to 4, characterized in that the reinforcing portion is a reinforcing portion that reinforces each opposing corner portion of two decks installed adjacent to each other via joints along a direction perpendicular to the bridge axis.

7. 4. The deck slab joint structure according to claim 3, wherein the reinforcing plate has a through hole penetrating the plate surface at the center of the plate surface.

8. 5. The deck slab joint structure according to claim 3, wherein the reinforcing plate has a plurality of through holes penetrating the plate surface.

9. 5. The deck slab joint structure according to claim 3, wherein the reinforcing plate has an uneven surface.

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