Floor slab

Abstract

To provide a floor slab configured to be able to reduce a separation distance from a corner edge of the floor slab to a position at which a joint component is installed, and improve a crack suppression effect, durability, and load capacity of a portion in the vicinity of the corner edge of the floor slab.SOLUTION: A floor slab 10 formed of a reinforced-concrete having a square plate shape includes: a joint component (reception member 2A) of a first floor slab joint device 1A for connecting with a floor slab adjacent along a bridge axial direction Y of a bridge in the vicinity of the corner edge of one side edge surface 11 on one side edge surface 11 and another side edge surface 11 adjacent to each other with a corner edge as a boundary; and a joint component (reception member 2) of a second floor slab joint device 1 for connecting with a floor slab adjacent along a bridge axial perpendicular direction Y of the bridge in the vicinity of a corner edge of the other side edge surface 11. The joint component of the first floor slab joint device and the joint component of the second floor slab joint device are provided so as to be located on a straight line S parallel to the side edge surface 11.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a rectangular plate-shaped reinforced concrete deck slab that is installed on girders so as to be aligned along the bridge axis direction and perpendicular to the bridge axis, and is connected by a deck slab joint device. [Background technology]

[0002] BACKGROUND ART Deck slab joint devices known as cotter joints are known for connecting one deck slab and the other deck slab that are installed adjacent to each other on a bridge girder (see Patent Documents 1 and 2). A deck joint device is a device for connecting one deck to the other, which are installed adjacent to each other on the girder of a bridge.It is composed of a support member as a joint component, such as a C-shaped metal fitting, which is installed on one deck, a support member as a joint component, such as a C-shaped metal fitting, which is installed on the other deck, and a connecting member that connects these support members, such as an H-shaped metal fitting. The receiving member as a joint component member includes an engaged portion as a joint functional portion having an engaging recess, and an anchoring member that is fixed to the concrete of the deck slab in order to fix the engaged portion to the concrete of the deck slab. The connecting member has one engaging portion that engages with the engaging recess of one of the receiving members, the other engaging portion that engages with the engaging recess of the other receiving member, and a connecting portion that connects the one engaging portion and the other engaging portion. Furthermore, for deck replacement work on roads constructed on bridges, a known method is half-section construction (lane-specific deck replacement work) in which the bridge is divided into two phases: a first phase in which the direction perpendicular to the bridge axis Y of the bridge is divided into two equal parts, and the decks for the driving lanes are lined up and connected along the bridge axis direction (vehicle travel direction), and a second phase in which the decks for the passing lanes are lined up and connected along the bridge axis direction (vehicle travel direction) X (see Patent Document 2). In this half-section construction, the edge surface side that will extend perpendicular to the bridge axis is provided with receiving members for the deck joint device at a predetermined interval along the longitudinal direction of the edge surface, and the edge surface side that will extend along the bridge axis direction is provided with receiving members for the deck joint device at a predetermined interval along the longitudinal direction of the edge surface. [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] In Patent Document 2, deck joint devices with the same configuration are used for connecting adjacent decks along the bridge axis direction and for connecting adjacent decks perpendicular to the bridge axis. Therefore, when each receiving member is installed near one edge surface and the other edge surface adjacent to each other, with the corner edge of the square plate-shaped deck slab as the boundary, the fixing members of each receiving member will come into contact with each other.In this case, each receiving member must be installed at a necessary and sufficient distance from the corner edge so that the fixing members of each receiving member do not come into contact with each other and interfere with each other, and the distance from the corner edge of the deck slab to the position where the receiving member is installed must be long. However, if the distance from the corner edge of the deck slab to the position where the receiving member (joint component member) is installed is increased, there is a problem that cracks are more likely to occur in the area near the corner edge of the deck slab, which may reduce the durability and load-bearing capacity of the area near the corner edge of the deck slab. In view of the above-mentioned problems, the present invention provides a deck that is configured to shorten the distance from the corner edge of the deck to the position where the joint component member is installed, thereby improving the crack suppression effect, durability, and load-bearing capacity of the portion near the corner edge of the deck (corner portion). [Means for solving the problem]

[0005] The deck slab of the present invention is a rectangular plate-shaped reinforced concrete deck slab that is installed on girders so that it is aligned along the bridge axis direction and the direction perpendicular to the bridge axis of the bridge, and is connected by deck slab joint devices, and is characterized in that at one edge surface and the other edge surface that are adjacent to each other with the corner edge of the rectangular plate-shaped deck slab as the boundary, near the corner edge of one edge surface, a joint component of a first deck slab joint device is provided for connecting to the adjacent deck slab along the bridge axis direction of the bridge, and near the corner edge of the other edge surface, a joint component of a second deck slab joint device is provided for connecting to the adjacent deck slab along the direction perpendicular to the bridge axis of the bridge, and the joint component members of the first deck slab joint device and the second deck slab joint device are arranged so as to be positioned on a straight line parallel to the edge surfaces. The deck slab according to the present invention is a quadrangular, reinforced concrete deck slab that is installed on a girder so as to be aligned along the bridge axis direction and the direction perpendicular to the bridge axis of the bridge and is connected by a deck slab joint device, and on one edge surface and the other edge surface that are adjacent to each other with a corner edge of the quadrangular deck slab as a boundary, a joint component of a first deck slab joint device is provided near the corner edge of one edge surface to connect to the adjacent deck slab along the bridge axis direction of the bridge, and a joint component of a second deck slab joint device is provided near the corner edge of the other edge surface to connect to the adjacent deck slab along the direction perpendicular to the bridge axis of the bridge, and the joint component of the first deck slab joint device and The joint component members of the first and second deck slab joint devices each have a joint functional part and an anchoring member for anchoring the joint functional part to the concrete of the deck, and the joint component member of the first deck slab joint device is arranged so that the anchoring member extends in a direction perpendicular to one edge surface, and the joint component member of the second deck slab joint device is arranged so that the anchoring member extends in a direction perpendicular to the other edge surface, and the joint component members of the first deck slab joint device and the second deck slab joint device are arranged so that the anchoring members do not intersect with each other and are positioned on a straight line parallel to the edge surfaces. Furthermore, one of the joint components of the first deck slab joint device and the joint components of the second deck slab joint device is characterized in that it is provided at a position closer to the corner edge than the position of the extended end of the fixing member of the other of the joint components of the first deck slab joint device and the joint components of the second deck slab joint device. It is also characterized in that the joint functional portion of the joint component member of the first deck slab joint device and the joint functional portion of the joint component member of the second deck slab joint device are arranged so as to be positioned on a straight line parallel to the edge surface. Furthermore, one of the fixing members of the joint component member of the first deck slab joint device and the fixing members of the joint component member of the second deck slab joint device is characterized in that it is shorter in length than the other of the fixing members of the joint component member of the first deck slab joint device and the fixing members of the joint component member of the second deck slab joint device. Furthermore, when the deck slab joint device comprises a receiving member provided on one deck slab, a receiving member provided on the other deck slab, and a connecting member connecting these receiving members, and the receiving member has an engaged portion with which the connecting member engages, and an anchoring member for anchoring the engaged portion to the concrete of the deck slab, the joint component member is the receiving member and the joint functional portion is the engaged portion, and the deck slab joint device is comprised of a receiving member provided on one deck slab and a connecting member provided on the other deck slab, the receiving member has an engaged portion and an anchoring member for anchoring the engaged portion to the concrete of the deck slab, and the connecting member has an engaging portion that engages with the engaged portion and an anchoring member for anchoring the engaging portion to the concrete of the deck, the joint component member is the receiving member and the joint functional portion is the engaged portion, or the joint component member is the connecting member and the joint functional portion is the engaging portion. According to the present invention, the distance from the corner edge of the deck to the position where the joint component member is installed can be shortened, making it possible to provide a deck that is configured to improve the crack suppression effect, durability, and load-bearing capacity of the area near the corner edge of the deck (corner portion). It is also characterized in that the anchoring member is connected to the reinforcing bars in the deck slab. The anchoring member is characterized in that it is a tendon connected to the joint functional portion and applies prestress to the deck slab. The anchoring member is characterized in that it is a reinforcing bar in the deck slab connected to the joint functional portion. As a result of the above, it is possible to improve the crack suppression effect, durability, and load-bearing capacity of the areas near the corner edges (corner sections), while also reducing the cost of joint components, making it possible to provide an economical deck slab. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a plan view showing a deck slab joint structure (first embodiment). [Figure 2] An enlarged plan view of the main part showing the corner edge adjacent portion in the deck slab joint structure (embodiment 1). [Figure 3] FIG. 1 is a perspective view showing the positional relationship between one receiving member and the other receiving member in the vicinity of the corner edge of the deck slab (first embodiment). [Figure 4] 1A and 1B are diagrams showing a deck slab joint device 1, in which (a) is an exploded perspective view of the deck slab joint device, and (b) is a perspective view of the deck slab joint device (first embodiment). [Figure 5] 1A and 1B are diagrams showing a deck slab joint device 1A, in which (a) is an exploded perspective view of the deck slab joint device, and (b) is a perspective view of the deck slab joint device (first embodiment). [Figure 6] FIG. 10 is a plan view showing the deck slab joint structure (embodiment 2). [Figure 7] An enlarged plan view of the main part showing the corner edge adjacent portion in the deck slab joint structure (embodiment 2). [Figure 8] FIG. 10 is an explanatory diagram showing the main part of the deck (Embodiment 4). [Figure 9] An explanatory diagram of the main part showing the deck slab (Embodiment 5). [Figure 10] An explanatory diagram of the main parts showing the deck slab (Embodiment 7). [Figure 11] FIG. 10 is a plan view showing a deck slab having one receiving member and the other receiving member near the corner edge (Embodiment 8). [Figure 12] FIG. 10 is a plan view showing a deck slab having one receiving member and the other receiving member near the corner edge (Embodiment 9). [Figure 13]A plan view showing a deck slab equipped with an integrated support member near the corner edge (embodiment 10). [Figure 14] Plan view showing the deck (embodiment 11). [Figure 15] A diagram showing the area near the corner edge of the deck slab (enlarged detailed view of part A in Figure 14) (Embodiment 11). DETAILED DESCRIPTION OF THE INVENTION

[0007] Embodiment 1 As shown in FIG. 1, the deck 10 according to the first embodiment is a rectangular, plate-shaped, reinforced concrete deck that is installed on girders (not shown) so as to be aligned along the bridge axis direction X and the direction perpendicular to the bridge axis Y of the bridge and is connected by deck joint devices. It should be noted that a reinforced concrete deck is, for example, a deck containing reinforcing bars, or PC steel wires, or steel material, or two or more of these reinforcing bars, steel material, and PC steel wires.

[0008] As shown in Figures 2 and 3, for example, the deck 10 of embodiment 1 has adjacent edge surfaces 11 and the other edge surface 11, which are bounded by a corner edge 10E of the rectangular plate-shaped deck slab, and near the corner edge 10E of one edge surface 11, it has a receiving member 2A as a joint component of the deck slab joint device 1A as a first deck slab joint device for connecting to adjacent deck slabs along the bridge axis direction X of the bridge, and near the corner edge of the other edge surface 11 it has a receiving member 2 as a joint component of the deck slab joint device 1 as a second deck slab joint device for connecting to adjacent deck slabs along the direction perpendicular to the bridge axis Y of the bridge. As shown in Figure 3, 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, and the edge 11b on the lower surface of the deck slab; in other words, the side surface of the deck slab.

[0009] The receiving member 2A of the deck slab joint device 1A includes an engaged portion 5A as a joint functional portion, and fixing members 60A, 60A for fixing the engaged portion 5A to the concrete of the deck slab 10. The receiving member 2 of the deck joint device 1 includes an engaged portion 5 as a joint functional portion, and fixing members 60, 60 for fixing the engaged portion 5 to the concrete of the deck slab 10. The receiving member 2A of the deck slab joint device 1A is arranged so that the fixing members 60A, 60A extend in a direction perpendicular to one edge surface 11, and the receiving member 2 of the deck slab joint device 1 is arranged so that the fixing members 60, 60 extend in a direction perpendicular to the other edge surface 11.

[0010] In the deck 10 of embodiment 1, the support member 2A of the deck joint device 1A, which is provided near the corner edge 10E of one edge surface 11, and the support member 2 of the deck joint device 1, which is provided near the corner edge 10E of the other edge surface 11, are arranged so that the fixing member 60A and the fixing member 60 do not intersect, and are arranged to be located on a straight line S parallel to the other edge surface 11, and further, one of the support members 2A of the deck joint device 1A and the support member 2 of the deck joint device 1, the support member 2A, is arranged at a position closer to the corner edge 10E than the position T of the extended end of the fixing member 60, 60 of the other of the support member 2A of the deck joint device 1A and the support member 2 of the deck joint device 1. In the case of the deck slab 10 shown in Figure 2, the engaged portion 5A as the joint functional portion of the receiving member 2A and the fixing members 60, 60 of the receiving member 2 are positioned on a straight line S parallel to the other edge surface 11.

[0011] According to the deck 10 of embodiment 1 configured as described above, it is possible to position the receiving member 2A of the deck joint device 1A close to the corner edge 10E of the deck slab 10. Therefore, it is possible to provide a deck 10 that can improve the crack suppression effect, durability, and load-bearing capacity of the portion of the deck slab 10 near the corner edge 10E by providing receiving members 2A, 2 as each joint component member near one edge surface 11 and the other edge surface 11 adjacent to each other with the corner edge 10E as the boundary.

[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 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. 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 provided so as to extend rearward from the left side of the front wall portion 52 of 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 provided so as to extend rearward from the right side of the front wall portion 52 of 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, as shown in FIG. 4(a), the front wall portion 52 includes a left protruding portion 55L that protrudes leftward from the left wall portion 53L and a right protruding portion 55R that protrudes rightward from the right wall portion 53R. The upper and lower fixing members 60, 60 constituting the left fixing portion 6L are arranged to protrude rearward from the upper and lower sides of the rear surface 55b of the left protrusion portion 55L, and the upper and lower fixing members 60, 60 constituting the right fixing portion 6R are arranged to protrude rearward from the upper and lower sides of the rear surface 55b of the right protrusion portion 55R. In other words, the fixing portion 6 is made up of four fixing members 60, 60... provided so as to extend rearward from the four corners of the rear surface of the front wall portion 52, which has a rectangular outer shape, for example. The rear surface of the front wall portion 52 includes the rear surface 55b of the left protruding portion 55L and the rear surface 55b of the right protruding portion 55R, and a front inner wall surface 52b of the engaging recess 4, which will be described later. In other words, the receiving member 2 is installed on the edge surface 11 side of the deck slab 10, and in this case, the fixing portion 6 is composed of four fixing members 60, 60... that are arranged to extend from the four corners of the rear surface of the front wall portion 52, which has a rectangular outer shape (the upper and lower sides of the rear surface 55b of the left protruding portion 55L, and the upper and lower sides of the rear surface 55b of the right protruding portion 55R) toward the inside of the deck slab 10.

[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 the engaged portion 5 and the fixed portion 6 are integrally molded by pouring cast iron into a mold not shown. 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-side protruding portion 55L of the front wall portion 52 and are arranged so as to protrude rearward from the rear surface 55b of the left wall portion 53L and extend rearward, passing alongside the outer surface 53f of the left wall portion 53L; and the upper and lower fixing members 60, 60 constituting the right fixing portion 6R are integrally molded with the right wall portion 53R of the front wall portion 52 and are arranged so as to protrude rearward from the rear surface 55b of the right wall portion 53R 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. Here, a deck slab joint device 1A provided on the deck slab 10 according to the first embodiment will be described by way of example, which has the same configuration as the deck slab 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.

[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. 5, the same or corresponding parts as those in the deck slab joint device 1 in Fig. 4 are given the same reference numerals, and detailed explanations thereof will be omitted. That is, in the deck slab joint device 1A in Fig. 5, other than 2A, 3A, and 5A, the members given the same reference numerals as those in the deck slab joint device 1 in Fig. 4 have the same or corresponding configurations as those explained in the deck slab joint device 1 in Fig. 4, 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] Furthermore, the distance between the upper and lower fixing members 60, 60 of the receiving member 2 is set to be greater than, for example, 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).

[0025] 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 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 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. Thereafter, concrete is poured into the deck forming formwork and allowed to harden, thereby completing the deck slab 10 having 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 side. 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 further, in the same manner, a plurality of receiving members 2A, 2A... are installed in the deck slab forming formwork, and then concrete is poured into the formwork and allowed to harden, thereby forming a deck slab 10 in which receiving members 2A, 2A... are installed on one edge surface 11 side and receiving members 2, 2... are installed on the other edge surface 11 side.

[0026] 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.

[0027] The deck joint structure in which the above-mentioned deck slabs 10 are installed on the girder 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 through 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.

[0028] 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 deck slabs 10, 10 are connected to each other using deck slab joint devices 1A, 1 to form a corner edge assembly portion 10C, 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 1A, 1 and between the edge surfaces 11, 11 of each adjacent deck slab 10, 10 with a filler such as mortar or concrete.

[0029] 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 5(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. 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. After adjacent deck slabs 10, 10 are connected with deck slab joint devices 1A, 1A..., filler is filled above the fixed connecting member 3A and the engaged portion 5A, and filler is filled into the joint 16, which is the gap between the edge surfaces 11, 11 of adjacent deck slabs 10, 10, thereby completing the joining of adjacent deck slabs 10, 10. Thereafter, new deck slabs 10 are installed sequentially along the bridge axis direction X in the same manner, and the newly installed deck slabs 10 are joined to the deck slabs 10 already installed, thereby completing the first phase of construction.

[0030] 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.

[0031] 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 4(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.

[0032] 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.

[0033] 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.

[0034] In the half section construction described above, as shown in Figs. 2 and 3, the corners of the four deck slabs 10, 10 . . . are adjacent to each other via joints 15, 16 to form a corner assembly 10C. Conventionally, the corner assembly portion 10C has had a problem in that cracks are likely to occur in the corners and joints of the deck slab, which may result in a decrease in durability, load-bearing capacity, and the like. 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.

[0035] On the other hand, according to the deck slab 10 of embodiment 1, as shown in Figures 2 and 3, between adjacent edge surfaces 11 and the other edge surface 11 of the rectangular plate-shaped deck slab 10, which are bounded by a corner edge 10E, 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, and as shown in Figure 2, the engaged portion 5A of the receiving member 2A and the fixing members 60, 60 of the receiving member 2 are arranged to be positioned on a straight line S parallel to the other edge surface 11, and the receiving member 2A is arranged at a position closer to the corner edge 10E than the position T of the extended end of the fixing members 60, 60 of the receiving member 2. In other words, according to the deck 10 of embodiment 1, the receiving member 2A of the first deck joint device 1A can be arranged close to the corner edge 10E of the deck slab 10, so that at one edge surface 11 and the other edge surface 11 adjacent to each other with the corner edge 10E of the deck slab 10 as the boundary, receiving members 2A, 2 as each joint component are provided near the corner edge 10E, making it possible to provide a deck slab 10 that can improve the crack suppression effect, durability, and load-bearing capacity of the deck corners. Furthermore, in the corner assembly portion 10C, for example, as shown in Figure 2, it is now possible to shorten the distance M between the receiving members 2A and 2A provided near the corner edges of each deck slab 10, 10 lined up along the direction Y perpendicular to the bridge axis via joints 15, so that cracks are less likely to occur in the corners and joints 15, 16 of each deck slab 10, 10... in the corner assembly portion 10C, improving the crack suppression effect, durability, and load-bearing capacity of each corner and joint 15, 16 of each deck slab 10. According to the deck slab 10 of embodiment 1, it is possible to provide a deck slab 10 having 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 joint structure having 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.

[0036] Embodiment 2 When half-section construction is performed using the deck slab 10 according to the first embodiment, 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 7, 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 6 and 7, 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.

[0037] In the deck slab joint structure of embodiment 2, by using the deck slab 10 of embodiment 1, as shown in Figure 7, at the corner collection portion 10D, it is possible to shorten the distance M between the receiving members 2A and 2A provided near the corner edges 10E, 10E of each deck slab 10, 10 lined up along the direction Y perpendicular to the bridge axis via joints 15. Therefore, similar to the deck joint structure of embodiment 1, cracks are less likely to occur in the corners and joints 15 and 16 of each deck slab 10, 10 at the corner assembly portion 10D, making it possible to realize a deck joint structure that improves the crack suppression effect, durability, and load-bearing capacity of each corner and joint 15 and 16 of each deck slab 10, 10.

[0038] Furthermore, the deck 10 of embodiment 1 may be configured as follows, having a receiving member 2 of the deck joint device 1 as a first deck joint device for connecting to an adjacent deck along the bridge axis direction X of the bridge near the corner edge 10E of one edge surface 11, and having a receiving member 2A of the deck joint device 1A as a second deck joint device for connecting to an adjacent deck along the bridge axis perpendicular direction Y of the bridge near the corner edge of the other edge surface 11. In other words, the support member 2 of the deck slab joint device 1 provided near the corner edge 10E of one edge surface 11 and the support member 2A of the deck slab joint device 1A provided near the corner edge 10E of the other edge surface 11 are arranged so that the fixing member 60 and the fixing member 60A do not intersect, and are arranged to be located on a straight line S parallel to the edge surface (e.g., the other edge surface) 11, and further, the deck slab 10 may be configured so that one of the support members 2 and 2A is provided at a position closer to the corner edge 10E than the position T of the extended ends of the fixing members 60A, 60A of the other of the support members 2 and 2A. In this case, the engaged portion 5 as the joint functional portion of the receiving member 2 and the fixing members 60A, 60A of the receiving member 2A may be positioned on a straight line S parallel to the other edge surface 11, for example. Even with a deck 10 configured in this manner, the receiving member 2 of the deck joint device 1 can be positioned close to the corner edge 10E of the deck slab 10, so that on one edge surface 11 and the other edge surface 11 adjacent to each other with the corner edge 10E as the boundary, receiving members 2A, 2 as joint components can be provided near the corner edge 10E, thereby providing a deck 10 that can improve the crack suppression effect, durability, and load-bearing capacity of the portion of the deck slab 10 near the corner edge. In addition, in the above example, a deck 10 is shown in which the receiving member of the first deck joint device for connecting to adjacent decks along the bridge axis direction X of the bridge is arranged close to the corner edge 10E of the deck slab 10, but the deck slab 10 may also be one in which the receiving member of the second deck joint device for connecting to adjacent decks along the direction perpendicular to the bridge axis Y of the bridge is arranged close to the corner edge 10E of the deck slab 10.

[0039] Embodiment 3 The deck 10 of embodiment 3 is a deck 10 that incorporates a receiving member 2 that has an anchoring portion 6X that connects the anchoring member 60 of the receiving member 2 described above to a reinforcing bar 61 within the deck slab 10, as shown in Figure 8, for example. For example, as shown in Figures 8(a) and (b), a deck 10 is provided with an anchoring portion 6X in which an anchoring member 60 of a receiving member 2 of a deck joint device 1 is connected to a reinforcing bar 61 in the deck 10 using connection devices 65A, 65B, etc. The connection device 65A shown in Figure 8(a) is a connection device that connects reinforcing bars 61 and anchoring members 60 in a deck slab 10 that are arranged in parallel.The connection device is configured so that the anchoring member 60 is fixed to the connecting member 65a by passing the anchoring member 60 through one of the through holes formed in the connecting member 65a and then inserting a wedge-shaped inserting and fixing member 65c into the space 65b between one of the through holes and the outer peripheral surface of the anchoring member 60, and further so that the reinforcing bar 61 is fixed to the connecting member 65a by passing the reinforcing bar 61 through the other through hole formed in the connecting member 65a and then inserting a wedge-shaped inserting and fixing member 65c into the space 65b between the other through hole and the outer peripheral surface of the reinforcing bar 61. The connection device 65B shown in Figure 8(b) is a cylindrical connection device also called a "coupler" or "sleeve," and is a connection device that connects the reinforcing bar 61 in the deck 10 to the anchoring member 60 by, for example, inserting one end of the anchoring member 60 into the interior of the tube 65d from an opening on one side of the tube and inserting one end of the reinforcing bar 61 into the interior of the tube 65d from an opening on the other side of the tube, so that the anchoring member 60 and the reinforcing bar 61 are positioned in a straight line. The connecting device 65B is configured to connect one end of the fixing member 60 and one end of the reinforcing bar 61, for example, by forming a screw on the surface of one end of the fixing member 60 and the surface of one end of the reinforcing bar 61, and screwing the screw formed on the surface of one end of the fixing member 60 and the surface of one end of the reinforcing bar 61 into a screw hole formed on the inner surface of the tubular hole 65d, or by inserting one end of the fixing member 60 and one end of the reinforcing bar 61 into the tubular hole 65d and then filling the tubular hole 65d with a filler such as mortar or a resin adhesive.

[0040] According to the deck slab 10 of the third embodiment, the receiving member 2 having the above-mentioned fixing portion 6X is built in, so that punching shear resistance and bending stress resistance can be further improved. In addition, the fixing property of the receiving member 2 to the concrete of the deck slab 10 is improved.

[0041] It should be noted that a connection device other than the above-described connection devices 65A and 65B may also be used as the connection device. Furthermore, the deck slab 10 according to the third embodiment may have a configuration in which at least one of the upper and lower anchoring members 60, 60 . . . is connected to the reinforcing bars 61 in the deck slab 10. For example, as shown in FIG. 8(a), a configuration may be adopted in which a lower anchoring member 60 and a reinforcing bar 61 in the deck slab 10 are connected to each other.

[0042] Furthermore, the deck slab 10 of embodiment 3 may be configured to include a receiving member in which the fixing member 60A of the receiving member 2A as the joint component member described above is connected to the reinforcing bar 61 within the deck slab 10.

[0043] Embodiment 4 In each of the above-described embodiments, examples have been given of a receiving member 2 which is an integrally molded product in which the engaged portion 5 and the fixed portion 6 are integrated, and a deck slab 10 which has a receiving member 2A which is an integrally molded product in which the engaged portion 5A and the fixed portion 6A are integrated, but it is also possible for the deck slab 10 to have a receiving member (joint component member) in which the engaged portion and the fixed portion are formed separately and are connected to form an integrated structure. The attachment device for attaching the fixed portion to the engaged portion is not particularly limited. For example, a mounting device may be used in which a threaded portion is formed on one end side of the fixing member that constitutes the fixing portion, and the fixing member is attached by screwing the threaded portion into a threaded hole formed in the engaged portion, or a mounting device may be used in which the fixing member is attached by fastening a nut to the threaded portion that is passed through a through hole formed in the engaged portion. Alternatively, a mounting device may be used that is configured to connect the engaged portion and the fixing member with a connecting member such as a wedge.

[0044] Embodiment 5 As shown in Figure 9, the deck 10 of embodiment 5 is a deck 10 configured to incorporate a receiving member 2X having an anchoring portion 6Y that functions as an anchoring member 60, using a tension member 62 such as PC steel to apply prestress to the concrete of the deck 10, for example, using a pretensioning method. In the fifth embodiment, for example, an engaged portion 5X may be used that has a fixing device for fixing the tendon 62. As shown in Fig. 9, for example, the fixing device may be a fixing device that includes a female cone 56, which is a conical through-hole formed in the left protruding portion 55L (and the right protruding portion 55R, not shown in Fig. 9) as a fixing member mounting portion, and a plurality of wedge-shaped male cones 63 provided on the female cone 56 and divided into pieces. In the method for manufacturing the deck slab 10 according to the fifth embodiment, first, an engaged portion 5X having no anchoring portion 6 is placed in a formwork for forming the deck slab 10. Next, one end of a tendon 62 is fixed to the formwork facing the engaged portion 5X or to another engaged portion 5X installed in the formwork, and the other end of the tendon 62 is passed through the anchoring device provided in the engaged portion 5X and pulled with a jack or the like, thereby tensioning the tendon 62. Thereafter, concrete for forming the deck slab 10 is poured into the formwork with the tendon 62 tensioned. After the concrete hardens, one end of the tendon 62 is cut off, thereby introducing prestress (compressive force) CF from the tendon 62 into the concrete of the deck slab 10, as shown in FIG. 9 , to form the deck slab 10 having a receiving member 2X with an anchoring portion 6Y configured so that the tendon 62 functions as an anchoring member 60. In this way, the deck 10 incorporating the receiving member 2X equipped with the anchoring portion 6Y in which the tendon 62 that has prestressed the concrete of the deck 10 by the pretensioning method functions as the anchoring member 60 can improve the tensile strength of the deck 10 and improve the crack suppression effect of the deck 10. Furthermore, by having the tendon 62 function as the anchoring member 60, the cost of the anchoring member 60 can be reduced, and the cost of the receiving member 2X can also be reduced, making it possible to provide an economical deck 10. In addition, the fixation of the receiving member 2X to the concrete of the deck slab 10 is improved.

[0045] Embodiment 6 In embodiment 6, an example is given of a deck slab 10 equipped with an anchoring portion 6X in which a tension member 62 that introduces prestress into the deck slab 10 using a pretensioning method functions as an anchoring member 60, but the deck may also be equipped with an anchoring portion configured in such a way that a tension member that introduces prestress into the deck slab 10 using a posttensioning method functions as an anchoring member. This deck also provides the same effects as the deck slab 10 of the fifth embodiment.

[0046] It should be noted that the deck slab may be provided with a support member configured so that the tendon 62 functions as the fixing member 60A instead of the fixing member 60A of the support member 2A as the joint component member described above. For example, the rear wall portion 54 may be provided with a portion to which the tendon 62 is connected.

[0047] Embodiment 7 In the fifth and sixth embodiments, a deck slab 10 having a prestressed structure is exemplified, but the deck slab 10 of the seventh embodiment is a deck slab 10 having a structure in which reinforcing bars 61 arranged within the deck slab 10 function as anchoring members 60, as shown in FIG. That is, the deck slab 10 is provided with a receiving member 2X having a configuration in which reinforcing bars 61 that function as anchoring members 60 are connected to the left protruding portion 55L and the right protruding portion 55R of the front wall portion 52. For example, as shown in Figure 10, an engaged portion 5 is manufactured in which a threaded portion 66 is formed at the tip side of a reinforcing bar 61 placed within the deck slab 10, and threaded holes 67 are formed on the rear surfaces 55b of the left protruding portion 55L and the right protruding portion 55R of the front wall portion 52, and the threaded portion 66 at the tip side of the reinforcing bar 61 placed within the deck slab 10 and the threaded hole 67 are screwed together to connect them, resulting in a configuration comprising a receiving member 2X having an anchoring portion 6Z that makes the reinforcing bar 61 function as an anchoring member 60. According to the deck slab 10 of the seventh embodiment, the cost of the receiving member 2X can be reduced, and an economical deck slab 10 can be provided. In addition, the fixation of the receiving member 2X to the concrete that constitutes the deck slab 10 is improved. Furthermore, for example, a configuration may be adopted in which a through hole is formed in the left protruding portion 55L and the right protruding portion 55R of the front wall portion 52, the tip end of the reinforcing bar 61 is passed through the through hole, and a nut is fastened to the threaded portion at the tip end of the reinforcing bar 61, thereby connecting the reinforcing bar 61 that functions as the fixing member 60 to the left protruding portion 55L and the right protruding portion 55R of the front wall portion 52.

[0048] The deck slab 10 according to the seventh embodiment may be configured so that the reinforcing bars 61 arranged within the deck slab 10 function as anchoring members 60A for the receiving member 2A. In this case, for example, a screw hole may be formed on the rear surface of the rear wall portion 54 of the engaged portion 5A of the receiving member 2A described above, and a threaded portion formed on the tip side of the reinforcing bar 61 placed in the deck slab 10 may be screwed into the screw hole, thereby connecting the reinforcing bar 61 to the engaged portion 5A.

[0049] Embodiment 8 In each embodiment, an example is given of a deck slab 10 having a receiving member 2A and a receiving member 2 near the corner edge 10E, that is, a deck slab 10 having two types of receiving member 2A and a receiving member 2 near the corner edge 10E, but the deck slab 10 may be configured with one type of receiving member 2A and a receiving member 2A near the corner edge 10E, or a deck slab 10 configured with one type of receiving member 2 and a receiving member 2 near the corner edge 10E. For example, as shown in Figure 11, in the case of a deck slab 10 constructed with one type of receiving member 2 and receiving member 2 near a corner edge 10E, one receiving member 2 provided near the corner edge 10E of one edge surface 11 is provided so that the fixing members 60,60 extend in a direction perpendicular to one edge surface 11, and the other receiving member 2 provided near the corner edge 10E of the other edge surface 11 is provided so that the fixing members 60,60 extend in a direction perpendicular to the other edge surface 11, and the one receiving member 2 and the other receiving member 2 provided near the corner edge 10E are positioned on a straight line S parallel to the other edge surface 11 so that the fixing members 60,60 of one receiving member 2 and the fixing members 60,60 of the other receiving member 2 do not intersect, and further, one receiving member 2 is provided at a position closer to the corner edge 10E than the position T of the extended ends of the fixing members 60,60 of the other receiving member 2. In the case of the deck slab 10 shown in Figure 11, an example is shown of a deck slab 10 configured such that the engaged portion 5 as a joint functional portion of one receiving member 2 and the engaged portion 5 as a joint functional portion of the other receiving member 2 are positioned on a straight line S parallel to the other edge surface 11. Similarly, the floor slab 10 may have a configuration in which one type of receiving member 2A and another receiving member 2A are provided in the vicinity of the corner edge 10E.

[0050] According to the deck 10 of embodiment 8, as shown in Figure 11, the distance from the corner edge 10E of the deck slab to the position where the receiving member is installed can be shortened, and each receiving member can be provided near the corner edge 10E on one edge surface 11 and the other edge surface 11 adjacent to each other with the corner edge 10E of the deck slab as the boundary, thereby providing a deck slab 10 that can improve the crack suppression effect, durability, and load-bearing capacity of the deck slab corners.

[0051] Embodiment 9 In the deck 10 of embodiment 9, one of the fixing members of the receiving member of the first deck joint device and the fixing member of the receiving member of the second deck joint device, which are provided near the corner edge 10E, is configured to be shorter in length than the other of the fixing members of the receiving member of the first deck joint device and the fixing member of the receiving member of the second deck joint device. For example, as shown in Figure 12, one receiving member 2 provided near the corner edge 10E of one edge surface 11 is configured to have fixing members 60, 60 of a length shorter than the length of the fixing members 60, 60 of the other receiving member 2 provided near the corner edge 10E of the other edge surface 11. The deck slab 10 is configured such that one of the receiving members 2 provided near the corner edge 10E of one edge surface 11 has fixing members 60,60 extending in a direction perpendicular to one edge surface 11, and the other receiving member 2 provided near the corner edge 10E of the other edge surface 11 has fixing members 60,60 extending in a direction perpendicular to the other edge surface 11, and the one receiving member 2 and the other receiving member 2 provided near the corner edge 10E are positioned on a straight line S parallel to the other edge surface 11 so that the fixing members 60,60 of one receiving member 2 and the fixing members 60,60 of the other receiving member 2 do not intersect, and further one receiving member 2 is provided at a position closer to the corner edge 10E than the position T of the extended ends of the fixing members 60,60 of the other receiving member 2. In the case of the deck slab 10 shown in Figure 12, an example of a deck slab 10 is shown in which the engaged portion 5 as a joint functional portion of one receiving member 2 and the engaged portion 5 as a joint functional portion of the other receiving member 2 are positioned on a straight line S parallel to the other edge surface 11. Similarly, the floor slab 10 may have a configuration in which one type of receiving member 2A and another receiving member 2A are provided in the vicinity of the corner edge 10E.

[0052] According to the deck slab 10 of embodiment 9, as shown in Figure 12, it is possible to shorten the separation distance L between one of the support members, which has an anchoring member longer than the length of the anchoring member of the other support member, and the corner edge 10E of the deck slab 10.Therefore, it is possible to provide a deck slab 10 in which each support member is provided near the corner edge 10E on one edge surface 11 and the other edge surface 11 adjacent to each other with the corner edge 10E of the deck slab 10 as the boundary, thereby further improving the crack suppression effect, durability, and load-bearing capacity of the deck slab corners.

[0053] Embodiment 10 The deck 10 of embodiment 10 is configured to have an integrated receiving member near the corner edge 10E, which is configured to include an integrated engaged portion (integral joint function portion) formed by integrally joining the engaged portion (joint function portion) of the receiving member of the first deck slab joint device and the engaged portion (joint function portion) of the receiving member of the second deck slab joint device, and a fixing member. For example, as shown in FIG. 13, an integrated receiving member 2F including an integrated engaged portion 5X and fixing members 60X1, 60X2, 60Y1, 60Y2 is provided near the corner edge 10E. The integrated engaged portion 5X is configured to include one engaged portion 5B, the other engaged portion 5C, and a connecting portion 5D between the engaged portion 5B and the other engaged portion 5C. That is, the deck slab 10 of embodiment 10 has one engaged portion 5B provided near the corner edge 10E of one edge surface 11, and the other engaged portion 5C provided near the corner edge 10E of the other edge surface 11, and the fixing members 60X1, 60X2 provided on one engaged portion 5B and the fixing members 60Y1, 60Y2 provided on the other engaged portion 5C are arranged so as not to intersect, and one engaged portion 5B and the other engaged portion 5C are positioned, for example, on a straight line S parallel to the other edge surface 11. For example, the fixing member 60X1 provided on one engaged portion 5B and the fixing member 60Y1 provided on the other engaged portion 5C are arranged to extend in a direction perpendicular to the other edge surface 11, and the fixing member 60X2 provided on one engaged portion 5B and the fixing member 60Y2 provided on the other engaged portion 5C are arranged to extend in a direction perpendicular to the one edge surface 11.

[0054] According to the deck 10 of the tenth embodiment, as shown in FIG. 13, an integrated receiving member 2F is provided in the vicinity of the corner edge 10E, so that the distance between one of the engaged portions 5B and the corner edge 10E, and the distance between the other of the engaged portions 5C and the corner edge 10E can be shortened. It is possible to provide a deck slab 10 that can further improve the crack suppression effect at the corners of the deck slab, durability, and load-bearing capacity.

[0055] Embodiment 11 As the deck slab 10, as shown in FIG. 14, a deck slab 10 formed in the shape of a quadrangular plate having a parallelogram-shaped plate surface when viewed from above is known. In addition, in the deck slab 10 shown in Figure 14, the receiving members are not shown, and Figure 15, which is an enlarged view of part A in Figure 14, shows the embedded positions of the receiving members near the corner edges of the edge surfaces 11 of each deck slab 10, 10... In other words, the deck 10 is a rectangular reinforced concrete deck with a parallelogram-shaped plate surface that is installed on a girder so as to be aligned along the bridge axis direction and perpendicular to the bridge axis, and is connected by a deck joint device. The deck 10 of embodiment 11 has adjacent edge surfaces 11 and the other edge surface 11, which are bounded by a corner edge of the deck slab 10, and near the corner edge of one edge surface 11, a support member is provided as a joint component of a first deck slab joint device for connecting to an adjacent deck slab 10 along the bridge axis direction X of the bridge, and near the corner edge of the other edge surface 11, a support member is provided as a joint component of a second deck slab joint device for connecting to an adjacent deck slab 10 along the direction Y perpendicular to the bridge axis of the bridge. That is, as shown in Figure 15, in the deck slab 10 of embodiment 11, near the corner edge of one adjacent edge surface 11 and near the corner edge of the other edge surface 11, a receiving member 2M (a joint component of the first deck slab joint device for connecting to the adjacent deck slab 10 along the bridge axis direction X of the bridge) is provided near the corner edge of one edge surface 11, and a receiving member 2N (a joint component of the second deck slab joint device for connecting to the adjacent deck slab 10 along the bridge axis perpendicular direction Y of the bridge) is provided near the corner edge of the other edge surface 11. The receiving member 2M is arranged so that the fixing member 60 extends in a direction perpendicular to one edge surface 11, and the receiving member 2N is arranged so that the fixing member 60 extends in a direction perpendicular to the other edge surface 11. Furthermore, the fixing member 60 of the receiving member 2M and the fixing member 60 of the receiving member 2N are arranged so as not to intersect, and the receiving member 2M and the receiving member 2N are arranged so as to be positioned on a straight line S parallel to the edge surface 11. Therefore, according to the deck slab 10 of embodiment 11, as in embodiments 1 and 2, 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 is formed by the corners of four deck slabs 10, 10... as shown in Figure 15, it is possible to realize a deck slab joint 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.

[0056] In other words, the deck slab of the present invention is a quadrangular plate-shaped deck slab having a rectangular or parallelogram plate surface, and has adjacent edge surfaces on one side and the other side, with the corner edge of the edge as the boundary, and near the corner of one edge surface, it has one support member as a joint component that constitutes a first deck slab joint device for connecting to adjacent deck slabs along the bridge axis direction of the bridge, and near the corner of the other edge surface, it has the other support member as a joint component that constitutes a second deck slab joint device for connecting to adjacent deck slabs along a direction perpendicular to the bridge axis of the bridge, and the one support member and the other support member are arranged so that the fixing members do not intersect with each other and are positioned in a straight line parallel to the edge surfaces. According to the deck slab 10 of the present invention configured in this manner, it is possible to shorten the distance from the corner edge of the deck slab to the position where the receiving member is installed, and it is possible to provide a deck slab 10 configured to improve the crack suppression effect, durability, and load-bearing capacity of the portion near the corner edge of the deck slab (corner portion).

[0057] In each embodiment, an example has been given of a deck joint device 1 having a configuration including one support member 2 such as a C-shaped metal fitting provided on one deck slab 10 arranged adjacent to the bridge girder, another support member 2 such as a C-shaped metal fitting provided on the other deck slab 10 arranged adjacent to the bridge girder, and a connecting member 3 such as an H-shaped metal fitting that connects the one support member 2 and the other support member 2, but the deck joint device may be a deck joint device of other configurations, for example, a deck joint device of the following configuration.

[0058] In other words, the deck joint device may be a deck joint device that includes a receiving member such as a C-shaped metal fitting provided on one deck slab that is installed adjacent to the bridge girder, and a connecting member such as a T-shaped metal fitting provided on the other deck slab that is placed adjacent to the bridge girder, and that connects adjacent deck slabs by engaging the connecting member with a recess in the receiving member. In other words, the deck joint device used in the deck of the present invention may be a deck joint device 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 according to the present invention is a deck having a configuration including at least one of the above-mentioned receiving member and connecting member.

[0059] The deck joint device may also 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 installed adjacent to the bridge girder, and a connecting bolt as a connecting member installed across the one bolt box and the other bolt box to connect the one receiving member to the other receiving member. In this case, the deck according to the present invention is a deck having a receiving member as a joint component member having a recess such as the above-mentioned bolt box.

[0060] In other words, if the above-mentioned deck slab joint device comprises a receiving member provided on one deck slab, a receiving member provided on the other deck slab, 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 slab, the receiving member becomes the joint component member and the engaged portion becomes the joint functional portion. Furthermore, when the above-mentioned deck slab joint device is configured to include a receiving member provided on one deck slab and a connecting member provided on the other deck slab, and the receiving member has an engaged portion and a fixing portion for fixing the engaged portion to the concrete of the deck slab, 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 slab, then the receiving member becomes the joint component member and the engaged portion becomes the joint functional portion, or alternatively the connecting member becomes the joint component member and the engaged portion becomes the joint functional portion.

[0061] In other words, the deck slab of the present invention has adjacent edge surfaces, each of which is bounded by a corner edge of a rectangular plate-shaped deck slab, and is provided with a joint component member of a first deck slab joint device near the corner edge of one edge surface for connecting to an adjacent deck slab along the bridge axis direction of the bridge, and a joint component member of a second deck slab joint device near the corner edge of the other edge surface for connecting to an adjacent deck slab along a direction perpendicular to the bridge axis of the bridge.The joint component member of the first deck slab joint device and the joint component member of the second deck slab joint device may be any type of deck slab, as long as they are arranged in a straight line parallel to the edge surface, and the joint component members may be of any configuration, such as the above-mentioned receiving members and connecting members. [Explanation of symbols]

[0062] 1,1A Deck joint device, 2,2A,2F,2M,2N,2X Receiving member (joint component), 3, 3A connecting member, 4 engaging recess, 5, 5A engaged portion (joint functional portion), 6,6A,6X,6Y,6Z anchorage, 10 deck slab, 10E deck slab corner edge, 11 Edge surface of deck slab, 60, 60A Anchoring member, 61 Reinforcement bar in deck slab, 62 Tendon (anchoring member), X in the bridge axis direction, Y perpendicular to the bridge axis direction, S: A straight line parallel to the edge surface, T: The position of the extended end of the anchoring member of the other joint component.

Claims

1. A rectangular plate-shaped reinforced concrete deck slab that is installed on the girder so as to be aligned along the bridge axis direction and the direction perpendicular to the bridge axis and connected by a deck joint device. On one edge surface and the other edge surface adjacent to each other with a corner edge of the quadrangular plate-shaped deck slab as a boundary, a joint component of a first deck slab joint device is provided near the corner edge of one edge surface to connect to the adjacent deck slab along the bridge axis direction of the bridge, and a joint component of a second deck slab joint device is provided near the corner edge of the other edge surface to connect to the adjacent deck slab along the direction perpendicular to the bridge axis of the bridge, A deck characterized in that the joint component members of the first deck joint device and the joint component members of the second deck joint device are arranged so as to be positioned on a straight line parallel to the edge surface.

2. A rectangular plate-shaped reinforced concrete deck slab that is installed on the girder so as to be aligned along the bridge axis direction and the direction perpendicular to the bridge axis and connected by a deck joint device. On one edge surface and the other edge surface adjacent to each other with a corner edge of the quadrangular plate-shaped deck slab as a boundary, a joint component of a first deck slab joint device is provided near the corner edge of one edge surface to connect to the adjacent deck slab along the bridge axis direction of the bridge, and a joint component of a second deck slab joint device is provided near the corner edge of the other edge surface to connect to the adjacent deck slab along the direction perpendicular to the bridge axis of the bridge, The joint component member of the first deck slab joint device and the joint component member of the second deck slab joint device each include a joint functional part and an anchoring member for anchoring the joint functional part to the concrete of the deck, The joint component member of the first deck slab joint device is provided so that the fixing member extends in a direction perpendicular to one edge surface, and the joint component member of the second deck slab joint device is provided so that the fixing member extends in a direction perpendicular to the other edge surface, A deck characterized in that the joint component members of the first deck joint device and the joint component members of the second deck joint device are arranged so that the fixing members do not intersect with each other and are positioned in a straight line parallel to the edge surface.

3. A deck as described in claim 2, characterized in that one of the joint components of the first deck joint device and the joint components of the second deck joint device is provided at a position closer to the corner edge than the position of the extended end of the fixing member of the other of the joint components of the first deck joint device and the joint components of the second deck joint device.

4. A deck as described in claim 2, characterized in that the joint functional portion of the joint component member of the first deck joint device and the joint functional portion of the joint component member of the second deck joint device are arranged so as to be positioned in a straight line parallel to the edge surface.

5. A deck as described in claim 2, characterized in that one of the fixing members of the joint component member of the first deck joint device and the fixing member of the joint component member of the second deck joint device is shorter in length than the other of the fixing members of the joint component member of the first deck joint device and the fixing member of the joint component member of the second deck joint device.

6. When the deck joint device 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 comprises an engaged portion with which the connecting member engages, and an anchoring member for anchoring the engaged portion to the concrete of the deck, the joint component member is the receiving member and the joint functional portion is the engaged portion, A deck slab described in any one of claims 2 to 5, characterized in that when the deck slab joint device is configured to include a receiving member provided on one deck slab and a connecting member provided on the other deck slab, the receiving member having an engaged portion and an anchoring member for anchoring the engaged portion to the concrete of the deck slab, and the connecting member having an engaging portion that engages with the engaged portion and an anchoring member for anchoring the engaging portion to the concrete of the deck slab, the joint component member is the receiving member and the joint functional portion is the engaged portion, or the joint component member is the connecting member and the joint functional portion is the engaging portion.

7. 7. The deck according to claim 6, wherein the anchoring member is connected to a reinforcing bar in the deck.

8. 7. The deck according to claim 6, wherein the anchoring member is a tendon connected to the joint functional portion to apply prestress to the deck.

9. 7. The deck according to claim 6, wherein the anchoring member is a reinforcing bar in the deck connected to the joint function portion.

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