Floor-slab joining structure, floor slab used for floor-slab joining structure, and joint member

Abstract

To provide an inexpensive floor slab joining structure capable of joining one floor slab and the other floor slab installed on a girder of a bridge so as to be adjacent to each other via a joint.SOLUTION: A floor slab joint structure according to the present invention is a floor slab joint structure 1 for joining one floor slab 10 and the other floor slab 10 which are installed on a girder of a bridge so as to be adjacent to each other via a joint 12. The joint structure includes one recess 2 formed on a side edge surface 11 side of one floor slab 10 and opened to the side edge surface 11 of the floor slab 10 and an upper plate surface 10t of the floor slab 10, the other recess 2 formed on a side edge surface 11 side of the other floor slab 10 and opened to the side edge surface 11 of the floor slab 10 and the upper plate surface 10t of the floor slab 10, a joint member 3 installed over the one recess 2, a joint 12, and the other recess 2, and a filling material 4 filled in the one recess 2, the joint 12, and the other recess 2 in which the joint member 3 is installed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a deck slab joining structure for joining one deck slab and another deck slab that are installed adjacent to each other on a bridge girder via a joint. [Background technology]

[0002] BACKGROUND ART A deck joint device is known for joining one deck slab and another deck slab that are installed adjacent to each other via a joint on a bridge girder (see Patent Document 1, etc.). The deck slab is configured with a plurality of joint component members that constitute the deck slab joint device on the edge surface side adjacent to the joint, spaced at predetermined intervals along the longitudinal direction of the edge surface. A deck joint device is a device for connecting one deck to the other that are installed adjacent to each other on the girder of a bridge, and is composed of one support member as a joint component such as a C-shaped metal fitting installed on one deck, the other support member as a joint component such as a C-shaped metal fitting installed on the other deck, and a connecting member such as an H-shaped metal fitting connecting each of these support members. [Prior art documents] [Patent documents]

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

[0004] The above-mentioned deck joint device is composed of one support member provided on one deck, another support member provided on the other deck, and a connecting member connecting these support members.However, since these support members and connecting members are made of, for example, molded metal fittings, there was a problem in that the cost of the deck joint device was high. The present invention has been made in consideration of the above-mentioned problems, and provides an inexpensive deck slab joining structure, etc., that can join one deck slab and another deck slab that are installed adjacent to each other on a bridge girder via a joint. [Means for solving the problem]

[0005] The deck slab joining structure of the present invention is a deck slab joining structure that joins one deck slab and the other deck slab that are installed adjacent to each other on a bridge girder via a joint, and is characterized by having one recess formed on the edge surface side of one deck slab and opening to the edge surface of the deck slab and the upper plate surface of the deck slab, another recess formed on the edge surface side of the other deck slab and opening to the edge surface of the deck slab and the upper plate surface of the deck slab, a coupling member installed across one recess, the joint, and the other recess, and a filler material filled into the one recess, the joint, and the other recess where the coupling member is installed. Furthermore, one recess and the other recess are characterized by being recesses surrounded by one side wall surface and the other side wall surface extending from the edge surface of the deck slab in a direction intersecting the edge surface, an end wall surface connecting the extended ends of the one side wall surface and the other side wall surface, and a bottom surface connecting the bottom ends of each side wall surface and end wall surface. The one side wall surface and the other side wall surface are formed so as to extend in directions that gradually separate as they approach the extension end. The joint member also comprises one engaging portion, the other engaging portion, and a connecting portion connecting these engaging portions, and the one engaging portion and the other engaging portion are configured to extend in a direction along the edge surface of the deck slab, the connecting portion is installed across one recess, the joint, and the other recess, and one engaging portion is installed in one recess, and the other engaging portion is installed in the other recess. Furthermore, one recess and the other recess have a groove portion that opens to the edge surface of the deck slab and the upper plate surface of the deck slab, and an engaged recess that opens to the groove portion and the upper plate surface of the deck slab, and the groove portion is a groove portion surrounded by one groove wall surface and the other groove wall surface formed to extend from the edge surface of the deck slab in a direction perpendicular to the edge surface, and a bottom surface connecting the bottom ends of each groove wall surface, and the engaged recess is a recess surrounded by each side wall surface that extends from the extended ends of each groove wall surface of the groove portion along the edge surface in directions away from each other, an end wall surface that connects the extended ends of these side wall surfaces, and a bottom surface that connects the bottom ends of each side wall surface and end wall surface. The coupling member is also characterized in that it comprises one engaging portion, the other engaging portion, and a connecting portion connecting these engaging portions, one engaging portion of the coupling member is installed in the engaged recess of one recess, the other engaging portion of the coupling member is installed in the engaged recess of the other recess, and the connecting portion of the coupling member is installed in the groove and joint of one recess and the groove of the other recess. The connecting portion of the coupling member has a shape corresponding to the cross-sectional shape of the groove portion, and one engaging portion and the other engaging portion of the coupling member have a shape corresponding to the cross-sectional shape of the engaged recess. The engaged recess is characterized in that it is formed by a recess having a triangular cross-sectional shape surrounded by side wall surfaces that extend from the extended ends of the groove wall surface of the groove portion, which is formed to extend in a direction perpendicular to the edge surface, in directions away from each other along the edge surface and in a direction intersecting the groove wall surface of the groove portion in a direction away from the edge surface, end wall surfaces that connect the extended ends of each side wall surface, and a bottom surface that connects the bottom ends of each side wall surface and end wall surface. Furthermore, when the joint member is inserted and installed across one recess, the joint, and the other recess, the connecting portion is composed of a plate having a plate surface extending in the vertical and horizontal directions, and the engaging portion is characterized in that it has an outer wall surface extending from both horizontal ends of the connecting portion along the edge surface of the deck slab in directions away from each other and in directions away from the edge surface, in a direction intersecting the plate surface of the connecting portion, and an end side outer wall surface connecting the extended ends of these outer wall surfaces, and has a triangular cross-sectional shape configured as a triangular prism. The engaged recess is characterized in that it is formed by a recess having a rectangular cross-sectional shape surrounded by first side wall surfaces extending parallel to the edge surface from the extended ends of the groove wall surfaces of the groove portion formed to extend in a direction perpendicular to the edge surface so as to move away from each other along the edge surface, second side wall surfaces extending in a direction perpendicular to the edge surface so as to move away from the extended ends of each first side wall surface, end wall surfaces connecting the extended ends of each second side wall surface, and a bottom surface connecting the bottom ends of each side wall surface and end wall surface. The joint member is also characterized in that it is installed across one recess, the joint, and the other recess so that the inner peripheral surface of the recess and the outer peripheral surface of the joint member are spaced apart. The inner peripheral surface of the recess is formed as an inclined surface that slopes in the vertical direction, and the distance between opposing surfaces on the inner peripheral surface of the recess is configured to gradually narrow downward. Furthermore, the coupling member is characterized in that when inserted and installed across one recess, the joint, and the other recess, it has a portion that extends in the vertical and horizontal directions, and has a through hole that passes through that portion. The coupling member is also characterized by having a convex portion or a concave portion on its outer surface. The joint member is also characterized by including a joint-side installation portion that is installed in the joint so as to extend along the extension direction of the joint. Furthermore, the deck slab of the present invention is a deck slab used in the above-mentioned deck slab joint structure, and is characterized in that it has a plurality of the recesses on the edge surface side, spaced at predetermined intervals along the longitudinal direction of the edge surface. Furthermore, the joint member according to the present invention is a joint member used in the above-mentioned deck slab joining structure, and is characterized in that it is configured to be able to be installed across the one recess, the joint, and the other recess. According to the present invention, it is now possible to provide an inexpensive deck joint structure that can join one deck slab and another deck slab that are installed adjacent to each other on a bridge girder via a joint, as well as deck slabs and joint members that are used in the deck joint structure. [Brief explanation of the drawings]

[0006] [Figure 1]FIG. 1 is a plan view showing a deck and a deck joint structure (embodiment 1). [Figure 2] 1A and 1B are diagrams showing a deck slab joint structure, in which (a) is an exploded perspective view of the deck slab joint structure, and (b) is a perspective view of the deck slab joint structure (embodiment 1). [Figure 3] 1A and 1B are diagrams showing a deck slab joint structure, in which (a) is a plan view of the deck slab joint structure, and (b) is an AA cross-sectional view of (a) (a longitudinal cross-sectional view of the deck slab joint structure) (Embodiment 1). [Figure 4] 1A and 1B are diagrams showing a deck slab joint structure, in which (a) is a plan view of the deck slab joint structure, and (b) is an AA cross-sectional view of (a) (a longitudinal cross-sectional view of the deck slab joint structure) (embodiment 2). [Figure 5] 10A and 10B are diagrams showing a deck slab joint structure, in which (a) is a plan view of the deck slab joint structure, and (b) is an AA cross-sectional view of (a) (a longitudinal cross-sectional view of the deck slab joint structure) (Embodiment 3). [Figure 6] 10A and 10B are diagrams showing a deck slab joint structure, in which (a) is a plan view of the deck slab joint structure, and (b) is an AA cross-sectional view of (a) (a longitudinal cross-sectional view of the deck slab joint structure) (Embodiment 5). [Figure 7] 10A and 10B are diagrams showing a deck slab joint structure, in which (a) is a plan view of the deck slab joint structure, and (b) is an AA cross-sectional view of (a) (longitudinal cross-sectional view of the deck slab joint structure) (Embodiment 6). [Figure 8] 10A and 10B are diagrams showing a deck slab joint structure, where (a) is a plan view of the deck slab joint structure, and (b) is an AA cross-sectional view of (a) (longitudinal cross-sectional view of the deck slab joint structure) (Embodiment 7). [Figure 9] 10A and 10B are diagrams showing a deck slab joint structure, in which (a) is a plan view of the deck slab joint structure, and (b) is an AA cross-sectional view of (a) (longitudinal cross-sectional view of the deck slab joint structure) (Embodiment 8). [Figure 10] 10A and 10B are diagrams showing a deck slab joint structure, in which (a) is a plan view of the deck slab joint structure, and (b) is an AA cross-sectional view of (a) (longitudinal cross-sectional view of the deck slab joint structure) (Embodiment 9). [Figure 11] A longitudinal cross-sectional view of the deck slab joint structure (corresponding to the cross section AA in Figure 9(a)) (Embodiment 11). [Figure 12] A longitudinal cross-sectional view of the deck slab joint structure (corresponding to the cross section AA in Figure 9(a)) (Embodiment 12). [Figure 13]A longitudinal cross-sectional view of the deck slab joint structure (corresponding to the AA cross section in Figure 9(a)) (Embodiment 13). [Figure 14] 15A and 15B are diagrams showing a deck joint structure, where (a) is a plan view of the deck joint structure, and (b) is an AA cross-sectional view of (a) (longitudinal cross-sectional view of the deck joint structure) (Embodiment 15). DETAILED DESCRIPTION OF THE INVENTION

[0007] Embodiment 1 As shown in Figure 1, the deck joint structure 1 of embodiment 1 is a deck joint structure for joining one deck slab 10 and another deck slab 10 that are installed adjacent to each other on a bridge girder via a joint 12, and is composed of one recess 2 formed on the edge surface 11 side adjacent to the joint 12 of one deck slab 10 and opening to the edge surface 11 of the deck slab 10 and the upper plate surface 10t of the deck slab 10, the other recess 2 formed on the edge surface 11 side adjacent to the joint 12 of the other deck slab 10 and opening to the edge surface 11 of the deck slab 10 and the upper plate surface 10t of the deck slab 10, a joint member 3 inserted and installed across the one recess 2, the joint 12 and the other recess 2, and a filler 4 such as mortar, concrete, adhesive, etc. that is filled into the one recess 2, the joint 12 and the other recess 2 into which the joint member 3 has been inserted and installed.

[0008] 2 to 10 described below show a state in which the filler 4 has not yet been filled into one recess 2 and joint 12 in which the coupling member 3 has been inserted and installed, and the other recess 2; the deck slab joint structure 1 is formed when the filler 4 is filled into one recess 2, joint 12 in which the coupling member 3 has been installed, and the other recess 2 in which the filler 4 has been filled, as shown in FIGS. 2(b) to 10. In the deck slab joint structures 1 according to the first to twelfth embodiments, the edge surface 11 of the deck slab 10 is an edge surface of the deck slab 10 along the direction Y perpendicular to the bridge axis.

[0009] The deck 10 is a deck made of reinforced concrete, and 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.

[0010] As shown in FIG. 2, the one recess 2 and the other recess 2 include an engaged recess 2a and a groove 2b. The groove portion 2b is a groove portion that opens to the edge surface 11 adjacent to the joint 12 of the deck slab 10 and the upper plate surface 10t of the deck slab 10 and extends in a direction away from the edge surface 11. The engaged recess 2a is a recess that opens to the extension end of the groove 2b and the upper plate surface 10t of the deck slab 10.

[0011] As shown in Figure 3, the groove portion 2b is a groove portion having a horizontally elongated rectangular cross-sectional shape surrounded by one groove wall surface 2m and the other groove wall surface 2m formed to extend from the edge surface 11 of the deck slab 10 in a direction perpendicular to the edge surface 11, and a bottom surface 2d connecting the bottom ends of these groove wall surfaces 2m, 2m. The engaged recess 2a is a recess having a triangular cross-sectional shape surrounded by side wall surfaces 2p, 2p that extend from the extended ends of groove wall surfaces 2m, 2m of groove portion 2b, which is formed to extend in a direction perpendicular to the edge surface 11, in directions away from each other along the edge surface 11 and in a direction intersecting with the groove wall surfaces 2m, 2m of groove portion 2b, in a direction away from the edge surface 11, an end wall surface 2r that connects the extended ends of each side wall surface 2p, 2p, and a bottom surface 2d that connects the bottom ends of each side wall surface 2p, 2p and end wall surface 2r. Furthermore, the cross-sectional shape of the recess 2 (groove portion 2b, engaged recess 2a) refers to a cross-sectional shape (transverse cross-sectional (horizontal cross-sectional) shape) parallel to the upper plate surface 10t of the deck slab 10 (hereinafter, all cross-sectional shapes of the recesses refer to cross-sectional shapes parallel to the upper plate surface 10t of the deck slab 10). Furthermore, the bottom surface 2d of the groove 2b and the bottom surface 2d of the engaged recess 2a are positioned on the same plane. The angle formed by the intersecting groove wall surface 2m and side wall surface 2p is set, for example, within the range of about 135°±30°. Furthermore, the boundary portion between the groove wall surface 2m and the side wall surface 2p of the deck slab 10 is formed into a convex concrete portion 2T that functions as a shear key for receiving shear forces.

[0012] As shown in FIG. 2, the joint member 3 includes one engaging portion 3a, the other engaging portion 3a, and a connecting portion 3b connecting these engaging portions 3a, 3a. Furthermore, the connecting portion 3b or the engaging portion 3a of the joint member 3 has one or more through holes that penetrate the portions extending in the vertical and horizontal directions. In other words, the joint member 3 has a through hole formed therein that penetrates in a direction along the upper plate surface 10t of the deck slab 10 when inserted and installed across one recess 2, the joint 12, and the other recess 2. For example, as shown in FIG. 3, the connecting portion 3b has a through-hole 3c formed therethrough. The number of through holes 3c may be at least one. Furthermore, the shape of the through-hole 3c is not particularly limited, and may be, for example, a square or triangular through-hole, rather than a circular shape.

[0013] As shown in FIG. 3, the joint member 3 is configured as follows when viewed from above in a state where it is inserted across one recess 2, the joint 12, and the other recess 2 and installed. The connecting portion 3b is formed from a plate, such as a flat steel plate, having a plate surface that forms an outer wall surface 3f extending in the vertical and horizontal directions (bridge axis direction X), and is provided with a through hole 3c that passes through the plate that forms the connecting portion 3b. The engaging portion 3a has a triangular prism-shaped cross section, with outer wall surfaces 3p, 3p extending from both lateral ends of the connecting portion 3b along the edge surface 11 of the deck slab 10 in directions away from each other and in a direction intersecting with the outer wall surface 3f of the connecting portion 3b, and an end-side outer wall surface 3r connecting the extended ends of these outer wall surfaces 3p, 3p. For example, the engaging portion 3a is formed from a hollow triangular prism-shaped or solid triangular prism-shaped steel material having a triangular hollow portion 3h in cross section. Further, a configuration may be adopted in which a through hole 3c penetrates through the plate material portion 3rp forming the outer wall surface 3r and the plate material portions forming the outer wall surfaces 3p, 3p. The cross-sectional shape of the coupling member 3 (engagement portion 3a, connecting portion 3b) refers to the transverse (horizontal) cross-sectional shape of the coupling member 3 when the coupling member 3 is inserted across one recess 2, the joint 12, and the other recess 2 (hereinafter, all cross-sectional shapes of the coupling members refer to the transverse cross-sectional shape). The angle formed by the intersecting outer wall surface 3f and outer wall surface 3p is set to, for example, within a range of about 135°±30°, in accordance with the angle formed by the intersecting groove wall surface 2m and side wall surface 2p described above. In addition, the lower end surface 3L of the joint member 3 is formed as a flat surface.

[0014] That is, the connecting portion 3b of the coupling member 3 is formed in a cross-sectional shape corresponding to the cross-sectional shape of the groove portion 2b of the recess 2, and the engaging portion 3a of the coupling member 3 is formed in a cross-sectional shape corresponding to the cross-sectional shape of the engaged recess 2a of the recess 2. The coupling member 3 is inserted across one recess 2, the joint 12, and the other recess 2 so that the inner peripheral surface of the recess 2 (groove wall surface 2m, side wall surface 2p, end wall surface 2r) and the outer peripheral surface of the coupling member 3 (outer wall surfaces 3f, 3p, end side outer wall surface 3r) are spaced apart, and the coupling member 3 is installed in one recess 2, the joint 12, and the other recess 2 so that the lower end surface 3L of the coupling member 3, the bottom surface 2d of one recess 2, and the bottom surface 2d of the other recess 2 are in contact with each other. For example, as shown in FIG. 3(a), the coupling member 3 is configured to be installed across one recess 2, the joint 12, and the other recess 2 so that the outer wall surface 3f constituting the outer peripheral surface of the connecting portion 3b of the coupling member 3 and the groove wall surface 2m of the groove portion 2b of the recess 2 are separated by a distance w, and the outer wall surfaces 3p, 3p and the end-side outer wall surface 3r constituting the outer peripheral surface of the engaging portion 3a of the coupling member 3 are separated by a distance w from the side wall surfaces 2p, 2p and the end wall surface 2r of the engaged recess 2a of the recess 2. For example, the recess 2 and the joint member 3 are configured so that the distance w between the inner peripheral surface of the recess 2 and the outer peripheral surface of the joint member 3 is at least greater than the thickness of the plate material, such as a steel plate, that forms the connecting portion 3b of the joint member 3. In this way, the recess 2 and the joint member 3 are configured so that the inner surface of the recess 2 and the outer surface of the joint member 3 are installed at a distance. Therefore, even if one recess 2 and the other recess 2 are misaligned in the horizontal direction (the bridge axis direction X or the direction perpendicular to the bridge axis Y), the joint member 3 can be installed across one recess 2 and the other recess 2, thereby realizing a deck slab joint structure 1 that can deal with even if one recess 2 and the other recess 2 are misaligned in the horizontal direction.

[0015] The joint member 3 may be formed, for example, by bending and welding a steel plate, or may be formed by molding.

[0016] The deck slab 10 is configured with a plurality of recesses 2, 2 . . . provided adjacent to each other at predetermined intervals along the longitudinal direction of the edge surface 11. The deck slab 10 is manufactured, for example, as follows. Cores for forming the recesses 2, 2... are placed at predetermined positions within the formwork for forming the deck slab (positions along the portions that will become the edge surfaces of the deck slab), and reinforcing bars or the like are placed within the formwork. Thereafter, concrete is poured into the formwork, and after the concrete has hardened, the core is removed to produce a deck slab 10 having a plurality of recesses 2, 2... arranged adjacent to each other at a predetermined interval along the longitudinal direction of the edge surface 11.

[0017] Next, a method for joining the deck slabs 10 will be described. For example, as shown in FIG. 1, one deck 10 and the other deck 10 are installed adjacent to each other via a joint 12 on a girder (not shown) along the bridge axis direction X of the bridge. In this case, multiple pairs of adjacent recesses 2, 2 are formed on the edge surfaces 11, 11 of each adjacent deck slab 10, 10, with joints 12 between them, at predetermined intervals along the direction X perpendicular to the bridge axis, which is the longitudinal direction of the edge surfaces 11. Then, after inserting and installing the coupling members 3 into each pair of recesses 2, 2 and the joints 12, the filler material 4 is filled in and the filler material 4 hardens, thereby forming a deck slab joint structure 1 in which adjacent deck slabs 10, 10 are joined together along the bridge axis direction X of the bridge.

[0018] That is, a joint member 3 is installed across one recess 2, the joint 12, and the other recess 2, and a filler material 4 is filled into one recess 2, the joint 12, and the other recess 2 where the joint member 3 is installed, thereby joining one deck slab 10 and the other deck slab 10. In other words, one engaging portion 3a of the coupling member 3 is installed in the engaged recess 2a of one recess 2, the other engaging portion 3a of the coupling member 3 is installed in the engaged recess 2a of the other recess 2, and the connecting portion 3b of the coupling member 3 is installed in the groove 2b of one recess 2, the joint 12, and the groove 2b of the other recess 2, so that the coupling member 3 is installed in one recess 2, the joint 12, and the other recess 2. Then, filler 4 is filled into one recess 2 where the joint member 3 is installed, the joint 12, and the other recess 2, thereby forming a deck slab joining structure 1 in which one deck slab 10 and the other deck slab 10 are joined. As mentioned above, pairs of adjacent recesses 2,2 are provided on the edge surfaces 11,11 of each adjacent deck slab 10,10 and are adjacent to each other via joints 12, and multiple sets are formed at predetermined intervals along the direction X perpendicular to the bridge axis, which is the longitudinal direction of the edge surfaces 11.Therefore, as shown in Figure 1, one deck slab 10 and the other deck slab 10, which are installed adjacent to each other on the bridge girder via joints 12, are joined by multiple deck slab joining structures 1,1... made up of multiple locations at predetermined intervals along the longitudinal direction of the adjacent edge surfaces 11,11 via joints 12.

[0019] According to the deck slab joining structure 1 of embodiment 1, it is now possible to provide an inexpensive deck slab joining structure 1 that can join one deck slab 10 and another deck slab 10 that are installed adjacent to each other on a bridge girder via a joint 12. It is also possible to provide the deck slab 10 and the joint member 3 used in the deck slab joint structure 1.

[0020] Furthermore, according to the deck slab joining structure 1 of embodiment 1, one recess 2 and the other recess 2 are provided with an engaged recess 2a, and the joint member 3 is provided with an engaging portion 3a that engages with the engaged recess 2a.Therefore, as shown in Figure 3(a), the tensile force (pull-out force) TF applied to the joint member 3 is resisted by the shear resistance Sr generated in the concrete of the deck slab 10 due to the engaged recess 2a of the recess 2 formed in the deck slab 10 and the engaging portion 3a of the joint member 3.This means that the pull-out resistance force of the joint member 3 against the deck slab 10 can be increased, the joint member 3 can be made smaller, and a more inexpensive deck slab joining structure can be realized. Furthermore, since the connecting portion 3b of the joint member 3 is configured to have the through hole 3c, the pull-out resistance of the joint member 3 can be increased by the shear resistance of the filler 4 filled in the through hole 3c. Furthermore, since the boundary between the groove wall surface 2m and the side wall surface 2p in the deck slab 10 is formed as a convex concrete portion 2T, the convex concrete portion 2T functions as a shear key that absorbs shear forces, thereby increasing the shear resistance and further increasing the pull-out resistance of the joint member 3 to the pull-out force acting in the bridge axis direction X.

[0021] Embodiment 2 As shown in Figure 4, in embodiment 2, a deck slab joining structure 1 is provided with one recess 2A provided in one deck slab 10, another recess 2A provided in the other deck slab 10, and a joint member 3A connecting these recesses 2A, 2A. That is, as in embodiment 1, one recess 2A and the other recess 2A have a groove portion 2b that opens to the edge surface 11 of the deck slab 10 and the upper plate surface 10t of the deck slab 10 and extends in a direction away from the edge surface 11, and an engaged recess 2a that opens to the extended end of the groove portion 2b and the upper plate surface 10t of the deck slab 10.

[0022] In addition, in Figure 4 showing the contents of embodiment 2 and Figures 5 to 13 showing the contents of each embodiment described later, the same reference numerals as those used in Figure 3 explained in embodiment 1 are used, and components for which no special explanation is given are the same as or equivalent to the components explained in embodiment 1, and therefore, explanations of these components will be omitted hereafter.

[0023] In embodiment 2, the groove portion 2b of the recess 2A is a groove surrounded by one groove wall surface 2m and the other groove wall surface 2m formed to extend from the edge surface 11 in a direction perpendicular to the edge surface 11, and a bottom surface 2d connecting the bottom ends of these groove wall surfaces 2m, 2m, as in embodiment 1. The engaged recess 2a of the recess 2A is a recess with a rectangular cross-sectional shape surrounded by first side wall surfaces 2s, 2s that extend parallel to the edge surface 11 from the extended ends of the groove wall surfaces 2m, 2m of the groove portion 2b formed to extend in a direction perpendicular to the edge surface 11 so as to move away from each other along the edge surface 11, second side wall surfaces 2t, 2t that extend in a direction perpendicular to the edge surface 11 from the extended ends of the first side wall surfaces 2s, 2s in a direction away from the edge surface 11, end wall surfaces 2u that connect the extended ends of these side wall surfaces 2t, 2t, and a bottom surface 2d that connects the bottom ends of the side wall surfaces 2s, 2s and the end wall surface 2u. That is, the engaged recess 2a of the recess 2A is a recess surrounded by side wall surfaces 2s, 2t extending away from each other along the edge surface 11 from the extended ends of each groove wall surface 2m, 2m of the groove portion 2b, an end wall surface 2u connecting the extended ends of these side wall surfaces 2s, 2t, and a bottom surface 2d connecting the bottom ends of each side wall surface 2s, 2t and the end wall surface 2u. The bottom surface 2d of the groove 2b and the bottom surface 2d of the engaged recess 2a are positioned on the same plane.

[0024] Similarly to the first embodiment, the joint member 3A includes one engaging portion 3a, the other engaging portion 3a, and a connecting portion 3b connecting the one engaging portion 3a and the other engaging portion 3a. As shown in FIG. 4, the joint member 3A is configured as follows when viewed from above in a state where it is inserted across one recess 2, the joint 12, and the other recess 2 and installed. The connecting portion 3b of the joint member 3A is formed of a plate such as a steel plate having a plate surface extending in the vertical direction and the horizontal direction (bridge axis direction X). The engaging portion 3a of the joint member 3A is composed of a massive member (solid member) or a hollow member that extends from both lateral ends of the connecting portion 3b in directions away from each other along the edge surface 11 of the deck slab 10. The massive member is composed, for example, of a steel material with a square cross section, and the hollow member is composed, for example, of a steel material in the shape of a hollow square pillar with a hollow portion with a square cross section. The joint member 3A may be formed by welding the connecting portion 3b and the engaging portion 3a together, or may be formed by molding.

[0025] Furthermore, in the same manner as in the first embodiment, the connecting portion 3b of the joint member 3A is formed with a through hole 3c, and furthermore, the plate surface of the connecting portion 3b is configured to have a convex portion or a concave portion. For example, as shown in FIG. 4, a convex portion 3e is provided on the plate surface of the connecting portion 3b by welding a reinforcing bar or the like.

[0026] As shown in FIG. 4(b), the connecting portion 3b of the joint member 3A has an upper portion on the engaging portion 3a side that is formed as an upper curved edge portion 3sa that is curved and inclined downward from the upper edge 3ta toward the engaging portion 3a, and a lower portion on the engaging portion 3a side that is formed as a lower curved edge portion 3sb that is curved and inclined upward from the lower edge 3tb toward the engaging portion 3a.

[0027] As in the first embodiment, the connecting portion 3b of the coupling member 3A is formed in a shape corresponding to the cross-sectional shape of the groove portion 2b of the recess 2A, and the engaging portion 3a of the coupling member 3A is formed in a shape corresponding to the cross-sectional shape of the engaged recess 2a of the recess 2A. The coupling member 3 is also configured to be installed across one recess 2, the joint 12, and the other recess 2 so that the outer peripheral surface of the coupling member 3A and the inner peripheral surface of the recess 2 (groove wall surface 2m, side wall surfaces 2s, 2t, end wall surface 2u) are spaced apart.

[0028] Although the description will be omitted in each embodiment described later, in each embodiment described later, the coupling member is similarly configured to be installed across one recess, the joint, and the other recess so that the outer peripheral surface of the coupling member and the inner peripheral surface of the recess are separated by a distance w.

[0029] In embodiment 2, as in embodiment 1, coupling members 3A are inserted and installed into each pair of recesses 2A, 2A and into the joints 12, and then filler material 4 is filled in.The filler material 4 hardens, thereby forming a deck slab joining structure 1 in which adjacent deck slabs 10, 10 are joined along the bridge axis direction X of the bridge.

[0030] According to the deck slab joint structure 1 according to the second embodiment, the same effects as those of the first embodiment can be obtained. Furthermore, since the joint member 3A is provided with an engaged recess 2a and an engaging portion 3a having a square cross-sectional shape, and the connecting portion 3b of the joint member 3A is provided with a through hole 3c and a protrusion 3e, the pull-out resistance force of the joint member 3A against the deck slab 10 can be increased, making it possible to further reduce the size of the joint member 3, and making it possible to realize an even cheaper deck slab joining structure.

[0031] Furthermore, since the engaging portion 3a of the joint member 3A is made of a massive member, the pull-out resistance force of the joint member 3A against the deck slab 10 can be made even greater. Furthermore, since the connecting portion 3b of the joint member 3A is configured to include an upper curved edge portion 3sa and a lower curved edge portion 3sb, the material cost of the joint member 3A can be reduced, and the pull-out resistance of the joint member 3A can be increased due to the shear resistance of the filler 4 filled between the upper curved edge portion 3sa and the engaging portion 3a, and between the lower curved edge portion 3sb and the engaging portion 3a.

[0032] Embodiment 3 In embodiment 3, as shown in Figure 5, a deck slab joining structure 1 is provided with one recess 2B provided in one deck slab 10, another recess 2B provided in the other deck slab 10, and a joint member 3B connecting these recesses 2B, 2B.

[0033] As shown in Figure 5, the groove portion 2b is a groove surrounded by one groove wall surface 2mt and the other groove wall surface 2mt formed to extend from the edge surface 11 of the deck slab 10 in a direction perpendicular to the edge surface 11, and a bottom surface 2d connecting the bottom ends of these groove wall surfaces 2mt, 2mt. The engaged recess 2a is a recess with a triangular cross-sectional shape surrounded by side wall surfaces 2pt, 2pt that extend from the extended ends of groove wall surfaces 2mt, 2mt of groove portion 2b, which is formed to extend in a direction perpendicular to the edge surface 11, in directions away from each other along the edge surface 11 and in a direction intersecting the groove wall surfaces 2mt, 2mt of groove portion 2b, in a direction away from the edge surface 11, an end wall surface 2rt that connects the extended ends of each side wall surface 2pt, 2pt, and a bottom surface 2d that connects the bottom ends of each side wall surface 2pt, 2pt and end wall surface 2rt. The bottom surface 2d of the groove 2b and the bottom surface 2d of the engaged recess 2a are positioned on the same plane. The angle formed by the intersecting groove wall surface 2mt and side wall surface 2pt is set, for example, within the range of about 135°±30°.

[0034] The recess 2B of embodiment 3 has an inner circumferential surface (groove wall surface 2mt, side wall surface 2pt, end wall surface 2rt) formed as an inclined surface that slopes upward and downward, and is configured so that the distance between the opposing groove wall surfaces 2mt and 2mt, the distance between the side wall surface 2pt and 2pt, and the distance between the side wall surface 2pt and the end wall surface 2rt that form the inner circumferential surface of the recess 2B gradually narrows downward. That is, the engaged recess 2a and the groove 2b that constitute the recess 2B are configured to be downwardly tapered engaged recess 2a and groove 2b.

[0035] Furthermore, the joint member 3 has the same configuration as the joint member 3 described in embodiment 1, and includes one engaging portion 3d, the other engaging portion 3d, and a connecting portion 3c connecting the one engaging portion 3d and the other engaging portion 3d.

[0036] That is, in the deck slab joining structure 1 of embodiment 3, the side wall surfaces of the recess 2B are formed as inclined surfaces that slope in the vertical direction, and the distance between the opposing side wall surfaces of the recess 2B is configured to gradually narrow downward, the connecting portion 3b of the joint member 3 is formed in a shape corresponding to the cross-sectional shape of the groove portion 2b of the recess 2B, and the engaging portion 3a of the joint member 3 is formed in a shape corresponding to the cross-sectional shape of the engaged recess 2a of the recess 2B. In other words, one engaging portion 3a of the joint member 3 is installed in the engaged recess 2a of one recess 2B, the other engaging portion 3a of the joint member 3 is installed in the engaged recess 2a of the other recess 2B, the connecting portion 3b of the joint member 3 is installed in the groove portion 2b and joint 12 of one recess 2B and the groove portion 2b of the other recess 2, and filling material 4 is filled into each recess 2B, 2B and joint 12 in which the joint member 3 is installed, thereby forming the deck slab joining structure 1.

[0037] According to the deck slab joining structure 1 of embodiment 3, similar to the deck slab joining structures of embodiments 1 and 2, it is now possible to provide an inexpensive deck slab joining structure that can join one deck slab 10 and another deck slab 10 that are installed adjacent to each other on a bridge girder via a joint 12. In addition, the inner peripheral surface of the recess 2B (groove wall surface 2mt, side wall surface 2pt, end wall surface 2rt) is formed as an inclined surface that slopes in the vertical direction, and the recess 2B is formed so as to have a downward taper, making it easy to remove the core used to form the recess 2B in the deck slab 10.

[0038] Furthermore, the configuration of the recess 2B in the deck slab joining structure 1 of embodiment 3, in which the inner surface is formed as an inclined surface sloping in the vertical direction and is tapered downward, may be applied to the recesses described in the above-mentioned embodiments 1 and 2 and each embodiment described below.

[0039] Embodiment 4 As the joint member used in the above-described embodiments 1 and 3, a joint member not including the plate portion 3rp (see FIGS. 3 and 5) forming the outer wall surface 3r may be used instead of the above-described joint member 3. That is, a coupling member having an engaging portion formed by a bifurcated plate-like portion that forms the outer wall surfaces 3p, 3p, in other words, a coupling member having an engaging portion with a Y-shaped cross section at both lateral ends of the connecting portion 3b, may be used. The deck slab joint structure 1 according to the fourth embodiment also provides the same effects as those of the above-described embodiments.

[0040] Embodiment 5 As shown in Figure 6, in embodiment 5, a deck slab joining structure 1 is provided with one recess 2C provided in one deck slab 10, another recess 2C provided in the other deck slab 10, and a joint member 3C connecting these recesses 2C, 2C, and a filler material 4 is filled into the one recess 2C where the joint member 3C is installed, the joint 12, and the other recess 2C, thereby joining the one deck slab 10 and the other deck slab 10. That is, as in embodiments 1 to 4, one recess 2C and the other recess 2C have a groove portion 2b that opens to the edge surface 11 of the deck slab 10 and the upper plate surface 10t of the deck slab 10 and extends in a direction away from the edge surface 11, and an engaged recess 2a that opens to the extended end of the groove portion 2b and the upper plate surface 10t of the deck slab 10. The groove 2b and the engaged recess 2a of the recess 2C are configured in the same manner as in the second embodiment (see FIG. 4).

[0041] Similar to the first to fourth embodiments, the joint member 3C includes one engaging portion 3a, the other engaging portion 3a, and a connecting portion 3b connecting the one engaging portion 3a and the other engaging portion 3a. In embodiment 5, the joint member 3C is configured as follows when viewed from above in a state where it is inserted across one recess 2, the joint 12, and the other recess 2, as shown in FIG. 6. The connecting portion 3b is formed of a plate such as a flat steel plate having a plate surface extending in the vertical direction and the horizontal direction (bridge axis direction X). The engaging portion 3a is formed by a plate such as a flat steel plate having plate surfaces extending in directions away from each other along the edge surface 11 of the deck slab 10 from both lateral ends of the connecting portion 3b. That is, the joint member 3C is made of a steel material having an H-shaped or I-shaped cross section, for example. The joint member 3C may be formed by welding the connecting portion 3b and the engaging portion 3a together, or may be formed by molding, or may be cut from shaped steel.

[0042] In the fifth embodiment, the engaged recess 2a of the recess 2C is formed in a cross-sectional shape corresponding to the cross-sectional shape of the plate that constitutes the engaging portion 3a of the joint member 3C. That is, in the fifth embodiment, a coupling part 3C having an H-shaped or I-shaped cross section is provided, and one recess 2C and the other recess 2C correspond to the cross section of the coupling part 3C. According to the deck slab joint structure 1 according to the fifth embodiment, the same effects as those of the fourth embodiment can be obtained by using a simple joint member 3C formed in a plate shape.

[0043] Embodiment 6 As shown in Figure 7, in embodiment 6, there is provided one recess 2D provided in one deck slab 10, another recess 2D provided in the other deck slab 10, and a joint member 3D connecting these recesses 2D, 2D, and a filler material 4 is filled into the one recess 2D where the joint member 3D is installed, the joint 12, and the other recess 2D, thereby forming a deck slab joining structure in which one deck slab 10 and the other deck slab 10 are joined. One recess 2D and the other recess 2D have a groove portion 2b that opens to the edge surface 11 of the deck slab 10 and the upper plate surface 10t of the deck slab 10 and extends in a direction away from the edge surface 11, an engaged recess 2a that opens to the extended end of the groove portion 2b and the upper plate surface 10t of the deck slab 10, and an end groove portion 2j.

[0044] As in each of the above-mentioned embodiments, the groove portion 2b of the recess 2D is a groove surrounded by one groove wall surface 2m and the other groove wall surface 2m formed to extend from the edge surface 11 in a direction perpendicular to the edge surface 11, and a bottom surface 2d connecting the bottom ends of these groove wall surfaces 2m, 2m. The engaged recess 2a of the recess 2D includes first side wall surfaces 2s, 2s extending parallel to the edge surface 11 from the extended ends of groove wall surfaces 2m, 2m of the groove portion 2b formed to extend in a direction perpendicular to the edge surface 11 so as to move away from each other along the edge surface 11, second side wall surfaces 2t, 2t extending in a direction perpendicular to the edge surface 11 in a direction away from the extended ends of the first side wall surfaces 2s, 2s, The cross-sectional shape surrounded by the first end wall surfaces 2u, 2u extending in the horizontal direction and facing parallel to the side wall surfaces 2s, 2s, the second end wall surfaces 2e, 2e extending in a direction perpendicular to the peripheral surface 11 so as to move away from the extended ends of the first end wall surfaces 2u, 2u away from the peripheral surface 11, the third end wall surface 2f connecting the extended ends of the second end wall surfaces 2e, 2e, and the bottom surface 2d connecting the bottom ends of the side wall surfaces 2s, 2t and the end wall surfaces 2u, 2e, 2f is a T-shaped recess. That is, the engaged recess 2a of the recess 2D is a recess surrounded by side wall surfaces 2s, 2t extending away from each other along the edge surface from the extended ends of each groove wall surface 2m, 2m of the groove portion, end wall surfaces 2u, 2e, 2f connecting the extended ends of these side wall surfaces 2s, 2t, and a bottom surface 2d connecting the bottom ends of each side wall surface 2s, 2t and end wall surfaces 2u, 2e, 2f.

[0045] The joint member 3D includes one engaging portion 3a, the other engaging portion 3a, a connecting portion 3b connecting the one engaging portion 3a and the other engaging portion 3a, one extending portion 3j extending from one end side of the connecting portion 3b beyond the one engaging portion 3a, and the other extending portion 3j extending from the other end side of the connecting portion 3b beyond the other engaging portion 3a. In other words, the engaging portion 3a is not the extended end of the extension portion 3j, which is a plate portion continuous with the connecting portion 3b, but is configured to extend from the boundary portion between the connecting portion 3b and the extension portion 3j in a direction perpendicular to the extension direction of the connecting portion 3b and the extension portion 3j. The joint member 3D may be formed, for example, by welding the flat steel plates that form the connecting portion 3b and the extension portion 3j to the engaging portion 3a, or may be formed by molding. The deck slab joint structure 1 according to the sixth embodiment also provides the same effects as those of the fifth embodiment.

[0046] Embodiment 7 As shown in Figure 8, in embodiment 7, a deck slab joining structure 1 is provided with one recess 2E provided in one deck slab 10, another recess 2E provided in the other deck slab 10, and a joint member 3E connecting these recesses 2E, 2E, and a filler material 4 is filled into the one recess 2E where the joint member 3E is installed, the joint 12, and the other recess 2E, thereby joining the one deck slab 10 and the other deck slab 10. The one recess 2E and the other recess 2E are recesses surrounded by one side wall surface 2v and the other side wall surface 2v extending from the edge surface 11 of the deck slab 10 in a direction intersecting the edge surface 11, an end wall surface 2w connecting the extended ends of the one side wall surface 2v and the other side wall surface 2v, and a bottom surface 2d connecting the bottom ends of the side wall surfaces 2v, 2v and the end wall surface 2w, and the one side wall surface 2v and the other side wall surface 2v are configured by side wall surfaces formed so as to extend in directions that gradually move away from each other as they approach the extended ends.

[0047] That is, the recess 2E according to the seventh embodiment is formed as a recess having a trapezoidal cross section. That is, as shown in Figure 8(a), the recess 2E is formed into a trapezoidal shape in horizontal cross section, with the opening side along the edge surface 11 (a virtual horizontal line along the opening surface) being the upper base, the horizontal line along the end wall surface 2w being the lower base, and the horizontal line along one side wall surface 2v and the horizontal line along the other side wall surface 2v being the legs.

[0048] Similar to the fifth embodiment shown in FIG. 6, the joint member 3E includes one engaging portion 3a, the other engaging portion 3a, and a connecting portion 3b connecting the one engaging portion 3a and the other engaging portion 3a. That is, when the joint member 3E is installed by being inserted across one recess 2, the joint 12, and the other recess 2 as shown in Figure 3, when viewed from above, the connecting portion 3b is formed of a plate such as a flat steel plate having a plate surface extending in the vertical direction and the horizontal direction (bridge axis direction X), and the engaging portion 3a is formed of a plate such as a flat steel plate having a plate surface extending from both horizontal ends of the connecting portion 3b in directions away from each other along the edge surface 11 of the deck slab 10. That is, the joint member 3E has, for example, an H-shaped or I-shaped cross section, similar to the joint member 3C described in the fifth embodiment (FIG. 6).

[0049] According to the deck slab joining structure 1 of embodiment 7, the recess 2E is formed by side wall surfaces formed so that one side wall surface 2v and the other side wall surface 2v extend in directions that gradually separate them as they approach the extended end side. This increases the pull-out resistance force of the joint member 3E against the deck slab 10, making it possible to reduce the size of the joint member 3E and realize a more inexpensive deck slab joining structure. In the deck slab joint structure 1 according to the seventh embodiment, the engaging portion 3a of the joint member 3E may be formed in any shape as long as it is a shape that can increase the shear resistance. For example, the engaging portion 3a may be formed in the shape of a triangular prism extending in the vertical direction as shown in Figure 3 of embodiment 1, or a square prism, polygonal prism, cylindrical shape, etc., or may be formed in the shape of a square prism, polygonal prism, cylindrical shape, etc., extending in the horizontal direction as shown in Figure 4 of embodiment 2.

[0050] Embodiment 8 As shown in Figure 9, the deck joint structure 1 of embodiment 8 is a deck joint structure 1 for joining one deck slab 10 and the other deck slab 10 that are installed adjacent to each other on a bridge girder via a joint 12, and is provided with: one recess 2X formed on the edge surface 11 side of one deck slab 10 and opening to the edge surface 11 of the deck slab 10 and the upper plate surface 10t of the deck slab 10; another recess 2X formed on the edge surface 11 side of the other deck slab 10 and opening to the edge surface 11 of the deck slab 10 and the upper plate surface 10t of the deck slab 10; a coupling member 3X installed in one recess 2, the joint 12, and the other recess 2X; and a filler 4 (see Figure 1) filled in one recess 2X where the coupling member 3X is installed, the joint 12, and the other recess 2X.

[0051] The recess 2X is a groove-shaped recess surrounded by one groove wall surface 2m and the other groove wall surface 2m formed to extend from the edge surface 11 in a direction perpendicular to the edge surface 11, a bottom surface 2d connecting the bottom ends of these groove wall surfaces 2m, 2m, and a groove end wall surface 2x connecting the extended ends of these groove wall surfaces 2m, 2m and bottom surface 2d. When the joint member 3X is inserted and installed across one recess 2, the joint 12, and the other recess 2, it is formed from a plate such as a flat steel plate having a plate surface that extends in the vertical and horizontal directions (bridge axis direction X) when viewed from above.

[0052] According to the deck slab joining structure 1 of embodiment 8, one deck slab 10 and the other deck slab 10, which are installed adjacent to each other on the bridge girder via joints 12, are joined by the adhesive force between them and the filler 4 filled in the joints 12, the adhesive force between the side wall surfaces 2m, 2m and groove end wall surfaces 2x of the multiple recesses 2X, 2X... provided at predetermined intervals along the longitudinal direction of each edge surface 11, 11 of each adjacent deck slab 10, 10 via the joints 12 and the filler 4 filled in the multiple recesses 2X, 2X..., and the adhesive force between the multiple coupling members 3X,... installed in the multiple recesses 2X, 2X... and the filler 4 filled in the multiple recesses 2X, 2X...

[0053] According to the deck slab joining structure 1 of embodiment 8, it is now possible to provide an inexpensive deck slab joining structure 1 that can join one deck slab 10 and another deck slab 10 that are installed adjacent to each other on a bridge girder via a joint 12. In addition, it has become possible to provide the deck slab 10 and the joint member 3X used in the deck slab joint structure 1.

[0054] Embodiment 9 As shown in Figure 10, the deck slab joining structure of embodiment 6 may use a joint member 3Y that is configured to include a recess side installation portion 3x that is inserted and installed across one recess 2X, the joint 12, and the other recess 2X, and a joint side installation portion 3y that is arranged to extend from the recess side installation portion 3x and installed in the joint so as to extend along the extension direction of the joint 12. The recess-side installation portion 3x is made of a plate similar to the joint member 3X of the eighth embodiment shown in FIG. When the joint side installation portion 3y is configured to extend away from both plate surfaces at the horizontal center of the recess side installation portion 3x, as shown in Figure 10, for example, the joint member 3Y is configured as a member with a cross-shaped cross section. Although not shown, when the joint-side installation portion 3y is configured to extend from one plate surface of the recess-side installation portion 3x, the joint member 3Y is configured by a member with a T-shaped cross section.

[0055] According to the deck slab joining structure 1 of embodiment 9, the joint member 3Y is configured to have a recess side installation portion 3x and a joint side installation portion 3y and to have a cross-shaped or T-shaped cross section, thereby increasing the resistance of the joint member 3Y to bending deformation in the direction Y perpendicular to the bridge axis (deformation around the X-axis extending in the bridge axis direction X as the center of rotation).

[0056] The configuration of the joint-side installation portion 3y described in the ninth embodiment (FIG. 10) may be applied to the joint member described in each of the above-mentioned embodiments.

[0057] Embodiment 10 One recess and the other recess are recesses surrounded by one side wall surface and the other side wall surface extending from the edge surface 11 of the deck slab 10 in a direction intersecting the edge surface 11 other than perpendicularly, an end wall surface connecting the extended ends of the one side wall surface and the other side wall surface, and a bottom surface connecting the bottom ends of each side wall surface and end wall surface, and the one side wall surface and the other side wall surface may be composed of side wall surfaces facing each other in parallel. That is, instead of the groove portion 2b formed to extend from the edge surface 11 in a direction perpendicular to the edge surface 11 as shown in Figures 3 to 7, the one recess and the other recess may be configured to have a groove portion formed to extend from the edge surface 11 in a direction not perpendicular to the edge surface 11 (diagonally upward or diagonally downward on the paper of Figures 3 to 7), and the one recess and the other recess may be configured using a coupling member installed between the one recess, the joint, and the other recess. Furthermore, instead of the recesses 2X and 2Y formed to extend from the edge surface 11 in a direction perpendicular to the edge surface 11 as shown in Figures 9 and 10, the one recess and the other recess may be configured to have groove-like recesses formed to extend from the edge surface 11 in a direction not perpendicular to the edge surface 11 (diagonally upward or diagonally downward on the paper in Figures 9 and 10), and a coupling member may be used to install the one recess, the joint, and the other recess.

[0058] Furthermore, it is desirable that the joint member constituting the deck slab joining structure of the present invention be configured to have the through hole 3c described in embodiment 1, but it is also acceptable for it to be configured not to have the through hole 3c. In other words, when the joint member is inserted and installed across one recess, the joint, and the other recess, it preferably has a portion that extends in the vertical and horizontal directions (bridge axis direction X), and is configured with a through hole 3c that passes through that portion, but it is also acceptable for the joint member to be configured without the through hole 3c. For example, instead of the joint member of each embodiment that does not have the through hole 3c described above, a joint member configured to have the through hole 3c described above may be used.

[0059] Furthermore, it is desirable that the joint members constituting the deck slab joining structure of the present invention have a configuration that includes the convex portion 3e or the concave portion described in embodiment 2, but it is also acceptable for them to have a configuration that does not include these convex portions 3e or the concave portions. That is, it is preferable that the coupling member has a convex portion or a concave portion on the outer surface, or a convex portion 3e and a concave portion, but it may also have a configuration that does not have these convex portions or concave portions. For example, instead of the coupling member of each embodiment that does not have the above-mentioned convex portion 3e or concave portion, a configuration that has the above-mentioned convex portion 3e or concave portion, or a coupling member that has the convex portion 3e and concave portion may be used.

[0060] In addition, the deck slab joining structure may be configured using a recess described in one embodiment selected from the above-mentioned embodiments and a joint member described in another embodiment selected from the above-mentioned embodiments. That is, in each of the above-described embodiments, a deck slab joining structure may be formed by combining recesses and joint members of different embodiments. For example, the recess 2 of the first embodiment (FIG. 3) may be combined with the coupling part 3C of the fifth embodiment (FIG. 6), the recess 2E of the seventh embodiment (FIG. 8) with the coupling part 3 of the first embodiment (FIG. 3), the recess 2E of the seventh embodiment (FIG. 8) with the coupling part 3A of the second embodiment (FIG. 4), the recess 2E of the seventh embodiment (FIG. 8) with the coupling part 3A of the second embodiment (FIG. 4), the recess 2E of the seventh embodiment (FIG. 8) with the coupling part 3D of the sixth embodiment (FIG. 7), the recess 2E of the seventh embodiment (FIG. 8) with the coupling part 3X of the eighth embodiment (FIG. 9), or the coupling part 3Y of the ninth embodiment (FIG. 10).

[0061] Furthermore, the engaging portion 3a described in the first embodiment (FIG. 3) and the first embodiment (FIG. 5) may have any shape as long as it can increase the shear resistance. For example, the engaging portion 3a may be formed in the shape of a rectangular prism, a polygonal prism, a cylinder, or the like extending in the vertical direction. Furthermore, the massive member constituting the engaging portion 3a described in the second embodiment (FIG. 4) may be formed in any shape as long as it can increase shear resistance. For example, the engaging portion 3a may be formed in the shape of a polygonal pillar or a cylinder extending in the horizontal direction. The cross-sectional shape of the engaged recess 2a may then be formed to correspond to the cross-sectional shape of the engaging portion 3a.

[0062] In other words, in the deck slab joining structure of the present invention, the cross-sectional shape of the one recess and the other recess may be any shape as long as they are formed on the edge surface side of the deck slab and open to the edge surface of the deck slab and the upper plate surface of the deck slab, and the joint member may be configured to be installed across the one recess, the joint, and the other recess.

[0063] Next, an eleventh to fourteenth embodiment will be described. 11, 12, and 13 shown in the following Embodiments 11, 12, and 13 illustrate an example in which the recess 2X and coupling member 3X shown in FIG. 9 of Embodiment 8 are used, but the configurations described in Embodiments 11, 12, and 13 are similarly applicable to the cases in which the recess and coupling member described in each of the above-mentioned embodiments are used. That is, in the descriptions of embodiments 11, 12, and 13, the recesses refer to recesses 2, 2A, 2B, 2C, 2D, 2E, and 2X, and the coupling members refer to coupling members 3, 3A, 3B, 3C, 3D, 3E, 3X, and 3Y.

[0064] Embodiment 11 As shown in FIG. 11, one or more bulking members 6, each made of a block or the like having a vertical thickness of, for example, several mm to several tens of mm, may be installed on the bottom surface 2d of the recess, and the coupling member may be placed on the bulking member 6, with the filler 4 wrapping around and filling the gap between the lower end 3L of the coupling member and the bottom surface 2d of the recess. According to the deck slab joint structure 1 of embodiment 11, the pull-out resistance of the joint member 3 can be increased by the shear resistance of the filler material 4 filled between the lower end 3L of the joint member and the bottom surface 2d of the recess. Furthermore, if there is a difference (error) in height between the bottom surface 2d of one recess and the bottom surface 2d of the other recess, the joint member can be formed on a horizontal surface by using padding members 6 of different heights.

[0065] Embodiment 12 As shown in FIG. 12, the lower end surface 3L of the joint member may be configured as a stepped surface having a lower surface 3Lb and an upper surface 3La. According to the twelfth embodiment, when the lower surface 3Lb of the lower end surface 3L of the coupling part is placed on the bottom surface 2d of the recess, the filler 4 flows around and fills the gap between the upper surface 3La of the lower end surface 3L of the coupling part and the bottom surface 2d of the recess. Therefore, the shear resistance of the filler 4 can further increase the pull-out resistance of the coupling part. The coupling member may be installed by providing the bulkhead 6 described in the eleventh embodiment between the lower side surface 3Lb of the coupling member of the twelfth embodiment and the bottom surface 2d of the recess, or between the upper side surface 3La of the coupling member of the twelfth embodiment and the bottom surface 2d of the recess.

[0066] Embodiment 13 As shown in FIG. 13, the bottom surface 2d of the recess may be formed as a stepped surface having an upper bottom surface 2da and a lower bottom surface 2db, and the lower end surface 3L of the coupling member may be formed as a stepped surface having an upper side surface 3La corresponding to the upper bottom surface 2da and a lower side surface 3Lb corresponding to the lower bottom surface 2db. In this case, the step surface formed on the bottom surface 2d of the recess functions as a shear key that receives shear force, thereby making it possible to further increase the pull-out resistance of the joint member. Furthermore, when the lower side surface 3Lb of the lower end surface 3L of the coupling member 3 is placed on the bottom surface 2d of the recessed portion, the filler 4 flows around and fills the gap between the upper side surface 3La of the lower end surface 3L of the coupling member 3 and the bottom surface 2d of the recessed portion 2, and the shear resistance of the filler 4 makes it possible to further increase the pull-out resistance of the coupling member. The coupling member may be installed by providing the bulkhead 6 described in the eleventh embodiment between the lower side surface 3Lb of the coupling member of the thirteenth embodiment and the lower bottom surface 2db of the recess, or between the upper side surface 3La of the coupling member of the thirteenth embodiment and the upper bottom surface 2da of the recess.

[0067] Embodiment 14 Furthermore, a protrusion 5 that functions as a shear key, as shown by the imaginary line (two-dot chain line) in FIG. 3, may be provided on the bottom surface 2d of the recess. By providing such a protrusion 5 that functions as a shear key, the shear resistance can be increased, and can be made greater than the pull-out resistance to the pull-out force of the joint member acting in the bridge axis direction X. Furthermore, as shown in Figure 4, when a joint member 3A having an engaging portion 3a on both ends of a connecting portion 3b with a reduced vertical width is used, the protrusion 5 can be positioned between the engaging portion 3a and the lower curved edge portion 3sb shown in Figure 4, so that the protrusion 5 functions as a shear key, thereby increasing the pull-out resistance of the joint member 3 to the pull-out force acting in the bridge axis direction X. The configuration of providing the protrusions 5 of the fourteenth embodiment can be similarly applied to each embodiment other than the first embodiment shown in FIG. 3 and the second embodiment shown in FIG.

[0068] Embodiment 15 In each of the above-described embodiments, a recess-forming member such as a core for forming a recess is installed (boxed out) in a formwork in advance, and after concrete is filled into the formwork, a recess is formed by removing the recess-forming member, thereby exemplified as a deck slab 10. However, as shown in Figure 14, a recess-forming plate material 3P for molding a recess may be installed in a formwork, and after concrete is filled into the formwork outside the recess-forming plate material 3P, the recess-forming plate material 3P may be left in place, thereby using a deck slab 10 formed so as to have a recess whose outer periphery and bottom are surrounded by the recess-forming plate material 3P. The recess forming plate material 3P is a plate-like member formed, for example, from a steel plate or the like, which opens onto the surface that becomes the edge surface 11 of the deck slab 10 and the surface that becomes the upper plate surface 10t of the deck slab 10, and has three wall surfaces (flat surfaces) and a bottom surface (flat surface) that surround a space with a square cross section. In the case of a configuration in which a recess is formed using the recess-forming plate material 3P, for example, by attaching reinforcing bars or the like, which serve as fixing members 7 to the concrete of the deck slab 10, to the outer plate surface 3Ps of the recess-forming plate material 3P by welding or the like, the pull-out resistance of the joint member can be further increased. As shown in FIG. 14, it is preferable that a plurality of fixing members 7 are provided at predetermined intervals along the thickness direction (vertical direction) of the deck slab. The number and length of the fixing members 7 may be set as appropriate. The fixing member 7 may be attached to the back plate surface 3Pb (see FIG. 14(a)) of the recess-forming plate material 3P by welding or the like. Note that Figure 14 illustrates a configuration in which the recess 2E shown in embodiment 7 is formed using a recess-forming plate material 3P, but the recess shown in any other embodiment other than embodiment 7 may also be formed using the recess-forming plate material 3P.

[0069] In other words, it is preferable that the recesses and joint members that constitute the deck slab joint structure according to the present invention have a configuration that can increase the shear resistance and increase the pull-out resistance of the joint members.

[0070] Embodiment 16 Furthermore, deck slabs that are formed in the shape of a square plate with a parallelogram-shaped surface when viewed from above, i.e., deck slabs made of reinforced concrete and formed in the shape of a square plate with a parallelogram-shaped surface, are known, but the deck slab joint structure of the present invention can also be applied when such square plate-shaped deck slabs formed in the shape of a parallelogram are installed adjacent to each other on the girder of a bridge via joints and joined. In other words, in this case, the deck joint structure is configured with one recess formed on the edge surface side of one of the deck slabs formed on the plate surface of the parallelogram and opening to the edge surface of the deck slab and the upper plate surface of the deck slab, another recess formed on the edge surface side of the other deck slab formed on the plate surface of the parallelogram and opening to the edge surface of the deck slab and the upper plate surface of the deck slab, a coupling member installed across one recess, the joint, and the other recess, and a filler material filled into one recess where the coupling member is installed, the joint, and the other recess.

[0071] Embodiment 17 Also, for example, half-section construction (lane-specific deck replacement work) is known, 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 deck slabs for the driving lanes are lined up and connected along the bridge axis direction (vehicle travel direction) X, and a second phase in which the deck slabs for the passing lanes are lined up and connected along the bridge axis direction (vehicle travel direction) X. That is, in this half-section construction in which the deck is replaced for each lane, filler is filled into the joints between the deck installed in the first phase of construction and the deck installed in the second phase of construction, thereby carrying out deck joining work between the deck installed in the first phase of construction and the deck installed in the second phase of construction, i.e., deck joining work between the decks perpendicular to the bridge axis, and in this deck joining work between the decks perpendicular to the bridge axis, it is possible to adopt the deck joining structure described in each of the above-mentioned embodiments. In this case, a deck slab having the above-mentioned recesses at a predetermined interval along the longitudinal direction of the edge surface on the edge surface side of the deck slab along the direction Y perpendicular to the bridge axis, and also having the above-mentioned recesses at a predetermined interval along the longitudinal direction of the edge surface on the edge surface side of the deck slab along the bridge axis direction X, can be used to construct a deck slab joint structure in which joint members are installed in each recess of each adjacent deck slab along the bridge axis direction X and filled with filler material, and also to construct a deck slab joint structure in which joint members are installed in each recess of each adjacent deck slab along the direction Y perpendicular to the bridge axis and filled with filler material. [Explanation of symbols]

[0072] 1 Floor slab joint structure, 2,2A,2B,2C,2D,2E,2X recess 2a Engaged recess, 2b groove 3,3A,3B,3C,3D,3E,3X,3Y fitting parts 3a Engaging part, 3b Connecting part, 3c Through hole, 3e Convex part 4 Filler, 10 Deck, 11 Deck edge surface, 12 Joint, X Bridge axis direction, Y Direction perpendicular to the bridge axis.

Claims

1. A deck joint structure that joins one deck slab and the other deck slab that are installed adjacent to each other on the bridge girder via joints, A deck slab joining structure characterized by comprising one recess formed on the edge surface side of one deck slab and opening to the edge surface of the deck slab and the upper plate surface of the deck slab, another recess formed on the edge surface side of the other deck slab and opening to the edge surface of the deck slab and the upper plate surface of the deck slab, a joint member installed across one recess, the joint, and the other recess, and a filler material filled into the one recess where the joint member is installed, the joint, and the other recess.

2. A deck slab joint structure as described in claim 1, characterized in that the one recess and the other recess are recesses surrounded by one side wall surface and the other side wall surface extending from the edge surface of the deck slab in a direction intersecting the edge surface, an end wall surface connecting the extended ends of the one side wall surface and the other side wall surface, and a bottom surface connecting the bottom ends of each side wall surface and end wall surface.

3. 3. The deck slab joint structure according to claim 2, wherein the one side wall surface and the other side wall surface are formed so as to extend in directions that gradually move apart as they approach the extension end.

4. The coupling member includes one engaging portion, another engaging portion, and a connecting portion connecting these engaging portions, The one engaging portion and the other engaging portion are configured to extend in a direction along the edge surface of the deck slab, A deck slab joining structure as described in claim 1, characterized in that the connecting portion is installed across one recess, the joint, and the other recess, one engaging portion is installed in one recess, and the other engaging portion is installed in the other recess.

5. The one recess and the other recess include a groove portion that opens to the edge surface of the deck slab and the upper plate surface of the deck slab, and an engaged recess portion that opens to the groove portion and the upper plate surface of the deck slab, The groove portion is a groove portion surrounded by one groove wall surface and the other groove wall surface formed so as to extend from the edge surface of the deck slab in a direction perpendicular to the edge surface, and a bottom surface connecting the bottom ends of these groove wall surfaces, The deck slab joining structure described in claim 1, characterized in that the engaged recess is a recess surrounded by side wall surfaces extending from the extended ends of each groove wall surface of the groove portion along the edge surface in a direction away from each other, end wall surfaces connecting the extended ends of these side wall surfaces, and a bottom surface connecting the bottom ends of each side wall surface and end wall surface.

6. The coupling member includes one engaging portion, another engaging portion, and a connecting portion connecting these engaging portions, A deck slab joining structure as described in claim 5, characterized in that one engaging portion of the joint member is installed in the engaged recess of one recess, the other engaging portion of the joint member is installed in the engaged recess of the other recess, and the connecting portion of the joint member is installed in the groove portion and joint of one recess and the groove portion of the other recess.

7. The connecting portion of the coupling member has a shape corresponding to the cross-sectional shape of the groove portion, 7. The deck slab joining structure according to claim 6, wherein one engaging portion and the other engaging portion of the joint member have a shape corresponding to the cross-sectional shape of the engaged recess.

8. The slab joining structure described in claim 7, characterized in that the engaged recess is composed of a recess having a triangular cross-sectional shape surrounded by side wall surfaces that extend from the extended ends of the groove wall surface of the groove portion formed to extend in a direction perpendicular to the edge surface, in directions away from each other along the edge surface and in a direction intersecting the groove wall surface of the groove portion, end wall surfaces that connect the extended ends of each side wall surface, and a bottom surface that connects the bottom ends of each side wall surface and end wall surface.

9. The deck slab joint structure described in claim 8, characterized in that when the coupling member is inserted and installed across one recess, the joint, and the other recess, the connecting portion is composed of a plate having a plate surface extending in the vertical and horizontal directions, and the engaging portion is configured as a triangular prism having outer wall surfaces extending from both horizontal ends of the connecting portion along the edge surface of the deck slab in directions away from each other and away from the edge surface, in a direction intersecting the plate surface of the connecting portion, and end side outer wall surfaces connecting the extended ends of these outer wall surfaces.

10. The slab joining structure described in claim 7, characterized in that the engaged recess is composed of a recess with a rectangular cross-sectional shape surrounded by first side wall surfaces extending parallel to the edge surface from the extended ends of the groove wall surfaces of the groove portion formed to extend in a direction perpendicular to the edge surface so as to move away from each other along the edge surface, second side wall surfaces extending in a direction perpendicular to the edge surface so as to move away from the extended ends of each first side wall surface, end wall surfaces connecting the extended ends of each second side wall surface, and a bottom surface connecting the bottom ends of each side wall surface and end wall surface.

11. A deck slab joining structure as described in any one of claims 1 to 10, characterized in that the joint member is installed across one recess, the joint, and the other recess so that the inner surface of the recess and the outer surface of the joint member are spaced apart.

12. A deck slab joint structure described in any one of claims 1 to 10, characterized in that the inner surface of the recess is formed into an inclined surface that slopes in the vertical direction, and the distance between opposing surfaces on the inner surface of the recess is gradually narrowed downward.

13. A deck slab joining structure described in any one of claims 1 to 10, characterized in that when the joint member is inserted and installed across one recess, the joint, and the other recess, it has a portion that extends in the vertical and horizontal directions, and has a through hole that passes through said portion.

14. The deck slab joint structure according to any one of claims 1 to 10, characterized in that the joint member has a convex portion or a concave portion on its outer surface.

15. A deck slab joining structure according to any one of claims 1 to 10, characterized in that the joint member has a joint-side installation portion that is installed in the joint so as to extend along the extension direction of the joint.

16. A deck used in the deck joint structure according to any one of claims 1 to 10, A deck slab characterized in that it has a plurality of recesses on its edge surface at predetermined intervals along the longitudinal direction of the edge surface.

17. A joint member used in the deck slab joint structure according to any one of claims 1 to 10, A joint member configured to be installable across one recess, a joint, and the other recess.

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