Floor slab, and floor slab joining method

Abstract

To provide a floor slab which is configured to dissolve or reduce a step between upper surfaces of the floor slabs installed so as to be adjacent to each other in a bridge axial direction of a bridge.SOLUTION: A floor slab 10 is a reinforced-concrete floor slab which is installed on a girder of a bridge and has a square plate shape, and a plate surface used as an upper surface 10a is formed on a surface non-parallel to a lower surface 10b. For example, among four apexes 10d1, 10d2, 10d3 and 10d4 of the upper surface, as for the two apexes 10d1 and 10d2 positioned on both ends of a diagonal line 10dx, vertical clearances H1 and H2 between the lower surface and the apexes are set at reference heights, and as for the other apexes 10d3 and 10d4 among the four apexes of the upper surface, vertical clearances H3 and H4 between the lower surface and the apexes are set at positions higher than the reference heights. The upper surface is an inclined surface inclined downward in directions of the two apexes 10d1 and 10d2 and the diagonal line 10dx from the other apexes 10d3 and 10d4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a deck or the like that is installed on a girder of a bridge. [Background technology]

[0002] A deck joint structure is known in which adjacent decks are joined via deck joint devices such as deck connection joints (mechanical joints) through joints on the girders along the bridge axis direction of the bridge (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-159233 A Summary of the Invention [Problem to be solved by the invention]

[0004] In bridges with variable cross slopes, the cross slope differs for each deck slab that is installed adjacent to the girder along the bridge axis direction with joints between them, resulting in a step (height difference) between the top surfaces of adjacent decks at the ends perpendicular to the bridge axis. For example, when joining deck slabs using a deck joint device such as the mechanical joint disclosed in Patent Document 1, the joint width is set narrow, for example at about 10 mm to 20 mm, and in bridges with large changes in cross slope, the step between the top surfaces of adjacent decks through the joints can be 20 mm or more. Therefore, in a deck slab joining structure in which deck slabs are joined using the above-mentioned deck slab joint device, if the joint width is narrow and the step between adjacent deck slabs through the joint is large, the slope of the upper surface (rubbing slope surface) of the rubbing joint formed by rubbing filler (joint material) into the joint may become steep. In addition, manufacturing errors in the deck slabs or construction errors during deck slab installation work may cause the difference in height between adjacent deck slabs through the joints to become large, and in this case, the slope of the top surface of the rubbing joint (rubbing slope surface) may also become steep. For example, as shown in Figure 16(a), when a step b occurs between the upper surface 10t of one deck slab 10Z and the upper surface 10t of the other deck slab 10Z that are arranged adjacent to each other with a joint 12 therebetween, as shown in Figure 16(b), the upper surface of the rubbing joint 18Z formed by filling the joint 12 between the upper surface 10t of one deck slab 10Z and the upper surface 10t of the other deck slab 10Z with filler 17 is formed into a rubbing slope surface SZ that is an inclined surface (gradient surface) that slopes downward from the boundary edge 11t between the upper surface 10t of the deck slab 10Z installed at a higher position and the edge surface 11 to the boundary edge 15t between the upper surface 10t of the deck slab 10Z installed at a lower position and the edge surface 11. Furthermore, the deck 10Z is, for example, a rectangular plate-shaped reinforced concrete deck that is installed adjacent to one another on the girders along the bridge axis direction of the bridge with joints 12 between them and connected by a deck joint device, and is configured to have multiple receiving members (joint constituent members) of a pair of receiving members that constitute the deck joint device on the edge surface 11 side extending perpendicular to the bridge axis of the bridge and adjacent to the joints 12, spaced a predetermined distance apart along the longitudinal direction of the edge surface 11. In addition, the underside 10b of the deck slab 10Z is shown as a plane in Figure 16, but in detail, it is configured to have at least a reference underside (hereinafter referred to as the reference underside) and a haunch (tapered) portion that protrudes downward from the reference underside and is joined to the girder, and the reference underside is formed on a plane that becomes a horizontal plane when positioned parallel to a horizontal plane. That is, the deck 10Z is configured such that the upper surface 10t and at least the reference lower surface of the lower surface 10b are planes parallel to each other. As the filler 17, for example, concrete, mortar, or the like is used. For example, in FIG. 16(a), if the joint width a of the joint 12 between adjacent floor slabs 10Z, 10Z is 20 mm, and the step (height difference) b between the upper surfaces 10t, 10t of the adjacent floor slabs 10Z, 10Z is 25 mm, as shown in FIG. 16(b), the gradient of the rubbing gradient surface SZ, which is the upper surface of the rubbing joint 18Z formed by rubbing the filler 17 against the joint 12, is given by the gradient θ=tan -1 The angle is (25 / 20)=51°, and the rubbing slope surface SZ becomes a steep rubbing surface. In this way, when the rubbing joint 18Z in which the rubbing slope surface SZ has a steep slope is constructed, the following problems may occur. First, when constructing a steeply inclined rubbing slope surface SZ, the filler that has not yet solidified flows out in the steeply inclined portion during rubbing work at a steep slope, making the rubbing work at a steep slope time-consuming and labor-intensive. In addition, poor adhesion in the waterproofing work in the subsequent process (peeling off of the waterproofing layer from the corners of the rubbing joint 18Z) becomes more likely to occur, and if such poor adhesion occurs, it may lead to corrosion of the rebar and spalling of the concrete due to rainwater seeping into the deck slab. Furthermore, during the maintenance phase, when replacing asphalt pavement, the asphalt is stripped off using a heavy machinery bucket. However, if the slope of the rubbing slope surface of the rubbing joint is steep, there is a risk that the heavy machinery bucket will strip off the filler material from the steep part of the rubbing joint along with the asphalt, which will reduce the durability and strength of the deck. The present invention has been made in consideration of the above-mentioned problems, and provides a deck, etc. that is configured to eliminate or reduce the step between the upper surfaces of each deck installed adjacent to each other along the bridge axis direction of the bridge. [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 top of a bridge girder, and is characterized in that the upper surface of the plate is formed in a plane that is non-parallel to the lower surface. Furthermore, of the four vertices of the upper surface, the two vertices located at both ends of the diagonal line have a vertical distance from the lower surface to the vertices set to a reference height, and the other vertices of the four vertices of the upper surface have a vertical distance from the lower surface to the vertices set to a position higher than the reference height, and the upper surface is an inclined surface that slopes downward from the other vertices toward the two vertices and the diagonal line. The present invention is also characterized in that one of the four vertices on the upper surface has a vertical distance from the lower surface to the vertex set to a reference height, and the other of the four vertices on the upper surface has a vertical distance from the lower surface to the vertex set to a position higher than the reference height, and the upper surface is an inclined surface that slopes upward from the one vertex toward the other vertex. Furthermore, the vertical distance from the lower surface to three of the four vertices on the upper surface is set to a reference height, and the vertical distance from the lower surface to the remaining vertices on the upper surface is set to a position higher than the reference height, and the upper surface is an inclined surface that slopes upward from the three vertices toward the remaining vertices. The bridge is also characterized in that the upper edge of at least one of a pair of edge surfaces that, when installed on a girder, extends along a direction perpendicular to the bridge axis of the bridge, is formed as an inclined upper edge that is inclined relative to the lower surface, and the upper surface is an inclined surface that inclines from the inclined upper edge toward the other upper edge. Furthermore, when installed on a girder, the upper edge of one of a pair of edge surfaces extending along a direction perpendicular to the bridge axis of the bridge is formed as one inclined upper edge that is inclined relative to the lower surface, and when installed on a girder, the upper edge of the other of the pair of edge surfaces extending along a direction perpendicular to the bridge axis of the bridge is formed as the other inclined upper edge that is inclined relative to the lower surface, the inclination direction of one inclined upper edge and the inclination direction of the other inclined upper edge are opposite, and the upper surface is an inclined surface composed of one-side inclined surface that inclines from a diagonal position connecting the lower vertex of one inclined upper edge and the lower vertex of the other inclined upper edge toward one inclined upper edge, and the other-side inclined surface that inclines from the diagonal position toward the other inclined upper edge. According to the deck slab of the present invention, it is possible to eliminate or reduce the step between the upper surfaces of each deck slab that is installed adjacent to each other along the bridge axis direction of the bridge, so that the slope of the rubbing upper surface of the rubbing joint formed between adjacent deck slabs can be made gentler, which makes it possible to facilitate the construction of the rubbing joint, improves the quality of subsequent waterproofing work, suppresses deterioration of the deck slab, and prevents damage to the rubbing joint during the maintenance stage. In addition, the deck slabs are installed adjacent to each other on the girders along the bridge axis direction of the bridge, with joints between them, and are connected by deck joint devices, and are characterized in that they are provided with a joint widening portion on the upper edge side of the edge surface that is adjacent to the joint and widens the joint.By providing the joint widening portion, the gradient of the rubbing slope surface can be made even gentler, thereby reducing the step that occurs between the deck slabs, and further facilitating the construction of the rubbing joints, improving the quality of subsequent waterproofing work, suppressing deterioration of the deck slabs, and preventing damage to the rubbing joints during maintenance. The deck slabs are installed adjacent to each other on the girders via joints along the bridge axis direction of the bridge and are connected by deck joint devices.When installed on the girders, the edge surface side extending perpendicular to the bridge axis of the bridge is provided with a plurality of joint components that constitute the deck joint device at predetermined intervals along the longitudinal direction of the edge surface, and each joint component is provided at a position spaced a fixed distance from the upper edge of the edge surface, thereby making it possible to reliably connect adjacent decks to each other using the deck joint device. The deck joint device is further characterized in that it comprises a pair of support members and a connecting member connecting the pair of support members, and the joint component member is one of the pair of support members. In addition, the deck joining method according to the present invention is a deck joining method in which decks are installed on girders so that they are adjacent to each other along the bridge axis direction of the bridge through joints, and adjacent decks are connected to each other along the bridge axis direction using a deck joint device, and the joints are filled with a filler. The method includes the steps of: determining a step value that occurs between the decks when it is assumed that rectangular decks of equal thickness are installed side by side on the girders of a bridge with a changing cross slope; manufacturing the deck according to the present invention described above based on the step value so that the deck to be installed later corresponds to the height of the upper surface of the deck to be installed earlier; and installing the manufactured deck so that it is adjacent to the deck installed earlier through joints along the bridge axis direction. This makes it possible to make the slope of the rubbing upper surface of the rubbing joint formed on each adjacent deck slab gentler, which makes it possible to facilitate the construction of the rubbing joint, improve the quality of the waterproofing work in the subsequent process, suppress deterioration of the deck, and prevent damage to the rubbing joint during the maintenance and management stage. Furthermore, since the deck slab of the present invention manufactured in the step of manufacturing the deck is installed in a curved section that bends along the bridge axis direction of the bridge, it is possible to make the slope of the upper rubbing surface of the rubbing joint formed on each adjacent deck slab in the curved section gentler, which makes it possible to facilitate the construction of the rubbing joint, improve the quality of the subsequent waterproofing work, suppress deterioration of the deck, and prevent damage to the rubbing joint during the maintenance stage. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 is a perspective view showing a deck slab (embodiment 1). [Diagram 2] FIG. 1 is a plan view showing the state in which deck slabs are connected to each other by a deck slab joint device (first embodiment). [Diagram 3] 1A and 1B are diagrams showing an example of a deck joint device used to connect decks for bridges, in which (a) is an exploded oblique view of the deck joint device, and (b) is a perspective view of the deck joint device (embodiment 1). [Figure 4] 3 is a view taken along the line AA in FIG. 2 (first embodiment). [Diagram 5] An enlarged perspective view of a key portion showing a receiving member provided on the edge surface side of the deck slab (embodiment 1). [Figure 6] FIG. 1 shows a friction joint installed between deck slabs (embodiment 1). [Figure 7] FIG. 13 is a perspective view showing the deck (embodiment 2). [Figure 8] 11 is a view taken along the line AA in FIG. 10 (third embodiment). [Figure 9] FIG. 11 shows a friction joint installed between deck slabs (Embodiment 3). [Figure 10] FIG. 11 is a plan view showing the state in which the deck slabs are connected to each other by a deck slab joint device (third embodiment). [Figure 11] An enlarged plan view showing deck slabs with joint widening sections installed next to each other (embodiment 3). [Figure 12] 12 is a view taken along the line AA in FIG. 11 (third embodiment). [Figure 13] An enlarged oblique view of the main parts (embodiment 3) showing the receiving member and the joint widening portion provided on the edge surface side of the deck slab. [Figure 14] FIG. 11 is a perspective view showing the deck (embodiment 5). [Figure 15] FIG. 13 is a perspective view showing the deck (embodiment 6). [Figure 16] 1(a) is a diagram showing the step and joint between adjacent deck slabs, and 1(b) is a diagram showing a welded joint installed in the joint between the steps (conventional example). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] EMBODIMENT 1 As shown in FIG. 1, the deck 10 of the first embodiment is a rectangular plate-shaped reinforced concrete deck that is installed on a girder of a bridge not shown in the figure, and is configured such that the plate surface forming the upper surface 10a is formed in a plane that is non-parallel to the lower surface 10b. A reinforced concrete deck is, for example, a deck containing reinforcing bars, or prestressing steel wires, or reinforcing bars and prestressing steel wires. In addition, the underside 10b of the deck 10 in embodiment 1 is shown as a plane in Figure 1, but like the underside 10b of the deck 10Z described above, it is configured to have at least a reference underside and a haunch (tapered) portion that protrudes downward from the reference underside and is joined to the girder, and the reference underside is formed on a plane that becomes a horizontal plane when positioned parallel to a horizontal plane. The deck 10 according to the first embodiment is configured such that the plate surface that becomes the upper surface 10a is formed in a surface that is not parallel to the reference lower surface at the lower surface 10b described above. In other words, in the deck 10 of embodiment 1, at least the reference lower surface on the upper surface 10a and the lower surface 10b are not formed by planes parallel to each other, and the upper surface 10a is formed by a surface that is not parallel to the reference lower surface on the lower surface 10b.

[0008] Specifically, the deck slab 10 is configured so that the plate surface that forms the upper surface 10a forms an inclined surface that is inclined with respect to a reference lower surface at the lower surface 10b.

[0009] In other words, the deck 10 of embodiment 1 is configured so that the height dimensions of the four corner edge portions 10c1, 10c2, 10c3, 10c4 on the rectangular plate-shaped edge surface (i.e., the surfaces other than the plate surface (side surfaces, end surfaces)) are not all the same dimension, and the plate surface forming the upper surface 10a connecting the four vertices 10d1, 10d2, 10d3, 10d4 which are the upper ends of these four corner edge portions 10c1, 10c2, 10c3, 10c4 is an inclined surface that is inclined relative to the reference lower surface on the lower surface 10b. That is, as shown in FIG. 1, the vertical distances H1, H2, H3, H4 (i.e., the height dimensions of the four corner edges 10c1, 10c2, 10c3, 10c4) from the four vertices 10d5, 10d6, 10d7, 10d8 on the lower surface 10b to the four vertices 10d1, 10d2, 10d3, 10d4 on the upper surface 10a corresponding to each of these vertices are not all the same distance. For example, as shown in FIG. 1, H1 and H2 are configured to have the same dimensions, and H1, H2, H3, and H4 are configured to have different dimensions. The plate surface that forms the upper surface 10a connecting the four vertices 10d1, 10d2, 10d3, and 10d4 that are the upper end points of the vertical distances H1, H2, H3, and H4 is configured to be an inclined surface that is inclined with respect to the reference lower surface at the lower surface 10b.

[0010] For example, as shown in FIG. 1, of the four vertices 10d1, 10d2, 10d3, and 10d4 of the upper surface 10a of the deck 10, which is rectangular when viewed from above, the two vertices 10d1 and 10d2 located at both ends of the diagonal 10dx of the upper surface 10a have vertical distances H1 and H2 from the lower surface 10b to the vertices set to the reference height (the height with the smallest height dimension from the lower surface 10b), and the other vertices 10d3 and 10d4 of the four vertices of the upper surface have vertical distances H3 and H4 from the lower surface 10b to the vertices set to a position higher than the reference height. The upper surface 10a is formed as a compound inclined surface composed of an inclined surface (gradient surface) 10S1 that slopes downward from each of the other vertices 10d3 toward the two vertices 10d1, 10d2 and the diagonal line 10dx, and an inclined surface (gradient surface) 10S2 that slopes downward from each of the other vertices 10d4 toward the two vertices 10d1, 10d2 and the diagonal line 10dx. In other words, the upper surface 10a is formed as a compound inclined surface composed of an inclined surface (gradient surface) 10S1 that slopes upward from the position of the diagonal line 10dx connecting the two vertices 10d1, 10d2 toward the vertex 10d3, and an inclined surface (gradient surface) 10S2 that slopes upward from the position of the diagonal line 10dx toward the vertex 10d4.

[0011] Explained from another perspective, when the deck slab 10 is installed on a girder, the upper edge of one of a pair of edge surfaces 11, 11 that extend along the direction perpendicular to the bridge axis Y of the bridge (see Figure 2) of the bridge is formed as one inclined upper edge S1 that is inclined relative to the reference lower surface of the lower surface 10b, and when the deck slab 10 is installed on a girder, the upper edge of the other of the pair of edge surfaces 11, 11 that extend along the direction perpendicular to the bridge axis Y of the bridge is formed as the other inclined upper edge S2 that is inclined relative to the reference lower surface of the lower surface 10b. The inclination direction of the one inclined upper edge S1 is opposite to the inclination direction of the other inclined upper edge S2. The upper surface 10a is formed as a compound inclined surface composed of an inclined surface (gradient surface) 10S1 on one side that inclines toward one inclined upper edge S1 from the position of a diagonal 10dx connecting the lower vertex 10d1 of one inclined upper edge S1 and the lower vertex 10d2 of the other inclined upper edge S2, and an inclined surface (gradient surface) 10S2 on the other side that inclines toward the other inclined upper edge S2 from the position of the diagonal 10dx. In other words, the upper surface 10a is formed as a compound inclined surface composed of an inclined surface (gradient surface) 10S1 on one side that inclines from one inclined upper edge S1 toward the position of the diagonal 10dx, and an inclined surface (gradient surface) 10S2 on the other side that inclines from the other inclined upper edge S2 toward the position of the diagonal 10dx.

[0012] The deck slab 10 according to the first embodiment will be described in further detail with reference to FIG. The deck 10 has a vertical distance H1 from the position of one diagonal point 10d1 of a pair of diagonal points (vertices) 10d1, 10d2 facing each other on a diagonal line 10dx on the top surface 10a to a diagonal point 10d5 of the bottom surface 10b facing the diagonal point 10d5 across a corner edge 10c1 of the rectangular plate, and a vertical distance H2 from the position of the other diagonal point 10d2 of a pair of diagonal points (vertices) 10d1, 10d2 facing each other on a diagonal line 10dx on the top surface 10a to a diagonal point 10d6 of the bottom surface 10b facing the diagonal point 10c2 of the rectangular plate. It is set shorter than the vertical distance H3 from the position of one diagonal point 10d3 of the other pair of diagonal points (vertices) 10d3, 10d4 facing each other on diagonal line 10dy on top surface 10a to the diagonal point 10d7 of bottom surface 10b facing it across corner edge 10c3 of the rectangular plate, and the vertical distance H4 from the position of the other diagonal point 10d4 of the other pair of diagonal points 10d3, 10d4 facing each other on diagonal line 10dy on top surface 10a to the diagonal point 10d8 of bottom surface 10b facing it across corner edge 10c4 of the rectangular plate. In other words, the vertical distance H3 from the lower surface 10b to the diagonal point 10d3 and the vertical distance H4 from the lower surface 10b to the diagonal point 10d4 are set longer than the vertical distance H1 from the lower surface 10b to the diagonal point 10d1 and the vertical distance H2 from the lower surface 10b to the diagonal point 10d2.

[0013] The upper surface 10a is composed of an inclined surface (gradient surface) 10S1 that slopes upward from the position of a diagonal 10dx connecting one pair of diagonal points 10d1, 10d2 toward one of the other pair of diagonal points 10d3, 10d4, and an inclined surface (gradient surface) 10S2 that slopes upward from the diagonal position 10dx toward the other of the other pair of diagonal points 10d3, 10d4. In other words, the upper surface 10a is formed as a compound inclined surface composed of an inclined surface (gradient surface) 10S1 that slopes downward from the diagonal point 10d3 toward the diagonal points 10d1, 10d2 and the diagonal position 10dx, and an inclined surface (gradient surface) 10S2 that slopes downward from the diagonal point 10d4 toward the diagonal points 10d1, 10d2 and the diagonal position 10dx.

[0014] In addition, the upper edge of the edge surface 11, which extends along the direction Y perpendicular to the bridge axis of the bridge, is an inclined upper edge S1 connecting one diagonal point 10d1 of one pair of diagonal points 10d1, 10d2 on the upper surface 10a to one diagonal point 10d3 of the other pair of diagonal points 10d3, 10d4 on the upper surface 10a, and an inclined upper edge S2 connecting the other diagonal point 10d2 of one pair of diagonal points 10d1, 10d2 on the upper surface 10a to the other diagonal point 10d4 of the other pair of diagonal points 10d3, 10d4 on the upper surface 10a. The vertical height dimension HM1 between the midpoint C1 of the inclined upper edge S1 and the lower surface 10b is HM1=(H1+H3) / 2, where H1 is the vertical height dimension between one end of the inclined upper edge S1 (diagonal point 10d1) and the lower surface 10b, and H3 is the vertical height dimension between the other end of the inclined upper edge S1 (diagonal point 10d3) and the lower surface 10b. In addition, the vertical height dimension HM2 between the midpoint C2 of the inclined upper edge S2 and the lower surface 10b is HM2 = (H2 + H4) / 2, where H2 is the vertical height dimension between one end of the inclined upper edge S2 (diagonal point 10d2) and the lower surface 10b, and H4 is the vertical height dimension between the other end of the inclined upper edge S2 (diagonal point 10d4) and the lower surface 10b. Furthermore, the vertical height dimension HMC between the midpoint C3 of the inclined line S3 connecting the midpoint C1 of the inclined upper edge S1 and the midpoint C2 of the inclined upper edge S2 and the lower surface 10b is HMC=(HM1+HM2) / 2.

[0015] The deck 10 of embodiment 1 is manufactured by the following manufacturing method, for example, by installing the receiving member 2 of the deck joint device 1 described later and reinforcing bars, etc., in a formwork and then filling the formwork with concrete. That is, the deck 10 of embodiment 1 is manufactured by a manufacturing method including, for example, a first step of setting an inclined surface reference (gradient surface reference) on the inner surfaces of the four sides of the formwork, a second step of pouring concrete into the formwork up to the lowest position of the inclined surface set within the formwork according to the inclined surface reference to form a flat upper surface, and a third step of forming the upper surface 10a into an inclined surface (gradient surface) by rubbing concrete onto the upper surface in accordance with the inclined surface reference when the concrete forming the flat upper surface has lost its fluidity. The inclined surface reference may be a line, a string, or the like that serves as a marker indicating the position of the inclined surface. The above-mentioned second step of flattening the upper surface and the third step of forming the upper surface 10a into an inclined surface may be performed, for example, manually by an operator.

[0016] Next, a deck joint device for joining decks installed adjacent to each other along the bridge axis direction of a bridge will be described. In the following, for example, as shown in FIG. 2, a case will be described in which a deck 10Z of a conventional configuration and the deck 10 according to the first embodiment are joined using the deck joint device 1. For example, as shown in FIG. 2, the deck joint device 1 is configured to include each of the receiving members 2A(2), 2B(2) as joint constituent members provided on the edge surfaces 11, 11 of each of the adjacent decks 10Z, 10 along the bridge axis direction X of the bridge, and a connecting member 3 connecting each of the receiving members 2A(2), 2B(2) provided on the edge surfaces 11, 11 of each of the adjacent decks 10, 10. As shown in Figure 2, one receiving member 2A(2) installed on the edge surface 11 side of one adjacent deck 10Z along the bridge axis direction X of the bridge and the other receiving member 2B(2) installed on the edge surface 11 side of the other adjacent deck 10 are connected by a connecting member 3, thereby connecting one deck 10Z and the other deck 10 arranged adjacent to each other. In addition, Figure 2 is a plan view seen from above of the state in which deck slabs 10Z, 10 arranged adjacent to each other on the girder along the bridge axis direction X of the bridge are connected by a deck slab joint device 1, and this plan view is a plan view in a state in which the joints 12 have not yet been filled with filling material 17.

[0017] As shown in FIG. 3, the receiving member 2 includes an engagement receiving portion 5 having an engagement recess 4 with which an engagement portion 7 provided on the connecting member 3 engages, and an anchoring portion 6 to be anchored to the concrete of the deck slab 10. The receiving member 2 of the deck slab joint device 1 is constituted by an integrally molded product made of steel or the like in which the engagement receiving portion 5 and the fixing portion 6 are integrally molded by pouring cast iron into a formwork, for example.

[0018] The connecting member 3 has one engaging portion 7 that engages with the engaging portion 5 of one of the receiving members 2, the other engaging portion 7 that engages with the engaging portion 5 of the other receiving member 2, and a connecting portion 8 that connects the one engaging portion 7 and the other engaging portion 7. That is, the connecting member 3 is composed of a pair of engaging portions 7,7 that engage with each engaging recess 4,4 of each engaging receiving portion 5,5 of the receiving members 2,2 respectively installed on each edge surface 11 of each adjacent deck slab 10, and a connecting portion 8 that connects the pair of engaging portions 7,7. The connecting member 3 is formed, for example, from a steel integrally molded product in which the pair of engaging portions 7, 7 and the connecting portion 8 are integrally molded by pouring cast iron into a mold.

[0019] The engaging receiving portion 5 of the receiving member 2 includes, for example, a bottom plate 51, a gable wall 52, a side wall 53 and an engaging wall 54, and includes an engaging recess 4 surrounded by the bottom plate 51, the gable wall 52, the side wall 53 and the engaging wall 54. That is, the engagement receiving portion 5 comprises a bottom plate 51, a gable wall 52 rising from the bottom plate 51, left and right side walls 53, 53 extending from both the left and right sides of the gable wall 52 and rising from the bottom plate 51, and an engagement wall 54 extending from the extended ends 53e, 53e of the left and right side walls 53, 53 and rising from the bottom plate 51.

[0020] The engagement recess 4 has an engagement portion insertion opening 41 which is an upper opening facing the bottom plate 51 and serves as an insertion port for inserting the engagement portion 7 into the engagement recess 4, and an opening facing the gable wall 52 and serves as an insertion groove for inserting the connecting portion 8. The opening 41 for inserting the engagement portion is an opening surrounded by the upper end of the end wall 52, the upper ends of the left and right side walls 53, 53, and the upper end of the engagement wall 54, and is formed by an opening through which the engagement portion 7 of the connecting member 3 can be inserted into the engagement recess 4 from above. The opening 42 for inserting the connecting part is a groove formed in the center between the left and right sides of the engagement wall 54 and extending continuously from the opening 41 for inserting the engagement part toward the bottom plate 51, and is formed with a groove width that allows the connecting part 8 of the connecting member 3 to be inserted from above.

[0021] The fixing portion 6 of the receiving member 2 embedded on the edge surface 11 side of the deck 10 is configured, for example, to include fixing members 60A, 60A such as two fixing reinforcements protruding from the left and right end sides of the outer surface of the gable wall 52 of the engaging receiving portion 5 and arranged at a distance in a direction (horizontal (left and right) direction) H along the plate surface of the deck 10, and an end connecting member 60B connecting the ends of these fixing members 60A, 60A.

[0022] The engagement portion 7 of the connecting member 3 is, for example, configured to have an outer peripheral wall facing the inner peripheral wall of the engagement recess 4, and is configured to have a fixing portion 72 having an outer wall surface 71 facing the inner wall surface of the gable wall 52 and the inner wall surfaces of the left and right side walls 53, 53, and a wall portion 74 having an inner wall surface 73 facing the inner wall surface 54u of the engagement wall 54.

[0023] The fixing portion 72 of the engagement portion 7 is formed with a bolt insertion hole 75 for fixing the fixing portion 72 to the bottom plate 51 of the engagement receiving portion 5 with a fixing means such as a bolt (not shown). In this case, the bolt insertion hole 75 is configured, for example, with a recess for accommodating and fastening the bolt head formed on the upper side of the fixing portion 72, and a bolt shaft fastening hole (internal thread hole) formed in the bottom surface of the recess. Incidentally, the fixing portion 72 and the bolt as the fixing means may not be used. For example, the engaging portion of the connecting member and the engaging receiving portion of the receiving member may be fixed by using a wedge-shaped insertion member (not shown) as a fixing means between the inner wall surface of the engaging wall of the engaging receiving portion and the inner wall surface of the wall portion of the engaging portion.In short, any configuration is acceptable as long as it is possible to fix the engaging portion of the connecting member and the engaging receiving portion of the receiving member.

[0024] The receiving member 2 is embedded in the edge surface 11 of the deck 10 with the engaging receiving portion 5 embedded in the edge surface 11 of the deck 10, for example, with the opening 41 for inserting the engaging portion and the opening 42 for inserting the connecting portion of the engaging recess 4 exposed to the outside, and the fixing portion 6 extended from the gable wall 52 toward the center of the deck 10 is embedded in the deck 10. That is, the receiving member 2 is placed in a formwork for forming the deck 10 (not shown) so that the opening 41 for inserting the engagement part and the opening 42 for inserting the connecting part of the engagement recess 4 of the receiving member 2 are exposed to the outside and the other parts are embedded in the concrete of the deck 10, and then concrete is poured into the formwork and allowed to harden, thereby forming the deck 10 with the receiving member 2 installed on the edge surface 11 side. In other words, as shown in FIG. 5, the receiving member 2 is embedded in the concrete of the deck 10 so that the opening 41 for inserting the engaging portion and the upper surface 2t around the opening 41 for inserting the engaging portion are exposed, and the opening 42 for inserting the connecting portion and the outer wall surface 54f of the engaging wall 54 are exposed, and above this exposed upper surface 2t, an upper opening space 16 is formed which functions as a space for inserting the connecting member 3 and a space for filling the filling material 17.

[0025] Then, from above each engagement recess 4,4 of the receiving members 2,2 embedded on the edge surfaces 11,11 of each adjacent deck slab 10Z,10 along the bridge axis direction X of the bridge, each engagement portion 7,7 of the connecting member 3 is inserted into each engagement recess 4,4 through the engagement portion insertion opening 41 at the top of each engagement recess 4,4, and the connecting portion 8 of the connecting member 3 is inserted into the connecting portion insertion opening 42 of each engagement recess 4,4. For example, by having each engagement wall surface 73,73 of the pair of engagement portions 7,7 guided by the inner wall surfaces 54u,54u of the left and right engagement walls 54,54, the pair of engagement portions 7,7 are inserted into the engagement recesses 4,4 (see Figure 3). Furthermore, by fixing the engaging portion 7 inserted into the engaging recess 4 with a fixing means, the engaging portion 7 of the connecting member 3 and the engaging receiving portion 5 of the receiving member 2 are fixed together. As a result of the above, the adjacent deck slabs 10Z, 10 are connected to each other by the deck slab joint device 1.

[0026] The deck 10 in embodiment 1 has a pair of receiving members 2, 2... that constitute the deck joint device 1, and is provided on the edge surface 11 side adjacent to the joint 12, extending along the direction Y perpendicular to the bridge axis of the bridge, with multiple receiving members (joint component members) 2 arranged at a predetermined interval along the longitudinal direction of the edge surface 11 (direction Y perpendicular to the bridge axis) (see Figure 2). As joint component members, each receiving member 2, 2... is configured to be provided at a position spaced a certain distance d from the inclined upper edge S1 or the inclined upper edge S2, respectively (see Figure 12. Note that Figure 12 is an explanatory diagram of the deck 10A described later, but the deck 10 has the same configuration as the deck 10A except for the widening joint portion 15, so the configuration in which each receiving member 2, 2... is provided at a position spaced a certain distance d from the inclined upper edge S1 or the inclined upper edge S2 is the same for the deck 10 and the deck 10A). Similarly, the deck 10Z also has, on the edge surface 11 side extending along the direction Y perpendicular to the bridge axis of the bridge and adjacent to the joint 12, a plurality of support members 2 (joint component members) of a pair of support members 2, 2... that constitute the deck slab joint device 1, spaced at a predetermined interval along the longitudinal direction of the edge surface 11 (direction Y perpendicular to the bridge axis) (see Figure 2), and each support member 2, 2... is configured to be located at a position spaced a certain interval d from the upper edge of each edge surface 11. In this way, in the deck 10, each receiving member 2, 2... is provided at a position spaced a certain distance d from the inclined upper edge S1 or the inclined upper edge S2, which are the upper edges of the edge surface 11, and similarly in the deck 10Z, each receiving member 2, 2... is provided at a position spaced a certain distance d from the upper edge of each edge surface 11, so that adjacent decks 10Z, 10 can be reliably connected using the deck joint device 1.

[0027] Next, a deck slab joining method according to the first embodiment using the deck slab 10 according to the first embodiment will be described. The deck joining method according to the first embodiment is a deck joining method in which decks are placed on girders (not shown) so that they are adjacent to each other along the bridge axis direction X of the bridge with joints 12 interposed therebetween, and adjacent decks are connected to each other along the bridge axis direction X using the above-mentioned deck joint device 1, and the joints 12 are filled with a filler material 17 (see FIG. 6). The deck joining method includes the steps of: determining a step difference value that will occur between the decks 10Z, 10Z when it is assumed that rectangular plate-shaped decks 10Z, 10Z... having equal plate thickness (the plate thickness between the reference lower surface of the lower surface 10b and the upper surface 10t is equal (i.e., the reference lower surface of the lower surface 10b and the upper surface 10t are formed in parallel planes)) are installed side by side on the girder of a bridge with a changing cross slope; manufacturing the deck 10 according to embodiment 1 based on the step difference value as the deck to be installed later so that it corresponds to the height of the upper surface of the deck to be installed earlier; and installing the deck 10 according to embodiment 1 manufactured so as to be adjacent to the previously installed deck 10Z along the bridge axis direction X with a joint 12 interposed therebetween.

[0028] In the step of determining the step value, during the design stage, calculations are performed to determine a value indicating each cross slope at each installation position where each deck slab 10Z, 10Z... is installed adjacent to each other along the bridge axis direction X of the bridge with joints 12 therebetween, a value indicating the cross slope difference between adjacent installation positions, a value indicating the step between the top surfaces of the deck slabs 10Z, 10Z when they are installed adjacent to each other, and the like. The step between the upper surfaces of adjacent decks may, for example, be a step at one end side in the direction perpendicular to the bridge axis Y (e.g., the upper side of Figure 2), a step at the other end side in the direction perpendicular to the bridge axis Y (e.g., the upper side of Figure 2), a step at an intermediate position between the center position in the direction perpendicular to the bridge axis Y and one end in the direction perpendicular to the bridge axis Y, or a step at an intermediate position between the center position in the direction perpendicular to the bridge axis and the other end in the direction perpendicular to the bridge axis.

[0029] In the step of manufacturing the deck 10, the deck 10 of embodiment 1 is manufactured having an upper surface 10a formed on the inclined surfaces 10S1, 10S2 so that the step between adjacent decks can be eliminated through the joints 12 along the bridge axis direction X of the bridge based on a numerical value indicating the step. For example, assuming that a deck 10Z is installed at a point where a cross-slope difference begins to occur and that a deck 10Z is installed next to the deck 10Z after the deck 10Z, the step between the upper surfaces of these decks is calculated, and the dimensions of the deck 10 after having an upper surface 10a that can eliminate this step are calculated based on the calculated step. Next, the dimensions of the deck 10 after having an upper surface 10a that can eliminate the step with the upper surface of the deck 10 installed earlier are calculated as the deck to be installed after the deck 10 whose dimensions have been calculated. The dimensions of the deck 10 to be installed later are calculated based on the step calculated in the step value calculation step and the dimensions of the deck installed earlier, for example. Thereafter, the dimensions of the deck 10 to be installed later may be calculated in the same manner. The deck 10 manufactured based on the above-mentioned calculation results was then installed adjacent to the previously installed deck 10Z with joints 12 between them, as shown in Figures 2, 4, and 6, thereby eliminating the step between the top surface of the previously installed deck 10Z. In addition, in Figure 4 and the cross-sectional view of Figure 8 described below, the parts of the upper surface 10a of the deck slabs 10, 10A that are located above the reference height are shown with hatching, and hatching of components located inside the deck slab has been omitted.

[0030] In particular, in curved sections (road bends) that bend along the bridge axis direction X of the bridge, the difference in cross slope between each adjacent deck slab along the bridge axis direction X of the bridge tends to become large, and a relatively large step of around 10 mm is likely to occur between the top surfaces of adjacent deck slabs in this section. In cases where such a relatively large difference in height occurs, the step with the upper surface of the previously installed deck slab can be eliminated by using the deck slab 10 of embodiment 1, thereby eliminating the slope of the rubbing surface 18a, which is the upper surface of the rubbing joint 18 constructed in the joint 12 between the edge surfaces 11, 11 of adjacent deck slabs, as shown in Figure 6, for example. This will facilitate the construction of rubbing joints, improve the quality of subsequent waterproofing work, suppress deterioration of the deck, and prevent damage to the rubbing joints during maintenance.

[0031] In addition, the deck installation example shown in Figure 2 illustrates an example in which, assuming that deck 10Z is installed at the position of deck 10 in Figure 2, in the upper side of Figure 2, there is no step between the upper surface of deck 10Z installed on the right side and the upper surface of deck 10Z installed on the left side, and in the lower side of Figure 2, the upper surface of deck 10Z installed on the right side is lower than the upper surface of deck 10Z located on the left side, and the deck 10 shown in Figure 1 is installed in place of the right-side deck 10Z.

[0032] In addition, the deck installation example shown in Figure 2 shows an example in which deck slab 10 is installed adjacent to deck slab 10Z, thereby eliminating the step between the upper surfaces of deck slabs 10Z, 10. However, the step between the upper surfaces of deck slabs 10, 10 can also be eliminated by installing deck slab 10 adjacent to deck slab 10.

[0033] As described above, after adjacent deck slabs are connected with the above-mentioned deck slab joint device 1, the joints 12 between the edge surfaces 11, 11 of adjacent deck slabs are filled with filler 17, and further, the upper opening space 16 is filled with filler 17, thereby realizing a deck slab joining structure in which the step between the upper surfaces of the deck slabs is eliminated.

[0034] That is, as shown in FIG. 6, construction is performed at a rubbing joint 18 where the upper surface of the filler 17 filled in the joints 12 between the edge surfaces 11, 11 of adjacent deck slabs is rubbed, and a rubbing joint not shown in the figure is constructed where the upper surface of the filler 17 filled in adjacent upper opening spaces 16, 16 (see FIG. 5) along the bridge axis direction X of the bridge is rubbed. In the case of this deck slab joint structure, the step between the upper surfaces of adjacent deck slabs is eliminated, so the rubbing joint only needs to be formed on a plane that does not incline between the upper surfaces of adjacent deck slabs, making it easy to construct the rubbing joint.

[0035] Therefore, according to the deck slab joining structure and deck slab joining method of embodiment 1, it becomes possible to eliminate the step between the upper surfaces of each deck slab installed adjacent to each other along the bridge axis direction X of the bridge with joints therebetween, thereby making it possible to facilitate the construction of the rubbing joints, improve the quality of the subsequent waterproofing work, suppress deterioration of the deck slabs, and prevent damage to the rubbing joints during the maintenance stage.

[0036] EMBODIMENT 2 According to the deck slab joining structure and deck slab joining method of the first embodiment, an example is shown in which a deck slab 10 having an upper surface 10a formed on inclined surfaces 10S1, 10S2 corresponding to the step is used so that the step between adjacent deck slabs can be eliminated via a joint 12 along the bridge axis direction X of the bridge. However, in the deck slab joining structure and deck slab joining method of the second embodiment, the steps between the upper surfaces of the deck slabs at different positions installed one after the other in a sequential order along the bridge axis direction X of the bridge are calculated, and the values ​​of the calculated steps between the upper surfaces of the deck slabs at different positions are each equal to or greater than a certain value, and even if the values ​​of the steps are different, the steps between the upper surfaces of adjacent deck slabs are reduced by using deck slabs 10 having the same upper surface 10a. For example, when the calculation result of the step between the upper surfaces of the decks to be installed one after the other is that the step value is 10 mm or more and less than 20 mm, and the step values ​​are different, for example, even if the step between the upper surfaces on one end side of decks at different positions is different, such as 12 mm, 14 mm, and 16 mm, respectively, a deck slab 10 with a sloped upper surface having the same upper surface 10a, for example, a deck slab 10 with a sloped upper surface having an upper surface 10a formed at H3-H1=10 mm in Figure 1, is used. In the case of embodiment 2, the step between the upper surfaces of adjacent deck slabs is not completely eliminated, but the step can be made smaller, and therefore the gradient of the rubbing slope surface of the rubbing joint can be made gentler. In this case, for example, it is preferable to set the gradient of the upper surface of the rubbing joint between adjacent deck slabs to 20% or less. According to the deck slab joining structure and deck slab joining method of embodiment 2, the step between the upper surfaces of adjacent decks can be reduced, thereby making it possible to facilitate the construction of the rubbing joints, improve the quality of subsequent waterproofing work, suppress deterioration of the decks, and prevent damage to the rubbing joints during the maintenance stage. In addition, in the case of embodiment 1, a deck slab 10 having an upper surface 10a formed on inclined surfaces 10S1, 10S2 that match the step between the upper surfaces of the deck slabs at different positions must be manufactured, but in the case of embodiment 2, it is only necessary to manufacture a deck slab 10 with a sloped upper surface having the same upper surface 10a, making it easier to manufacture the deck slab 10.

[0037] EMBODIMENT 3 As shown in Figures 7 to 13, the deck 10A of embodiment 3 is configured with a joint widening portion 15, which serves as a space adjacent to the joint 12 and widens the joint 12, on the upper edge side of the edge surface 11 located between adjacent receiving members 2 arranged at a predetermined interval along the longitudinal direction of the edge surface 11 of the deck 10 of embodiment 1. That is, the deck according to the third embodiment is a deck 10A having an upper surface 10a and a joint widening portion 15 formed on a compound inclined surface, as shown in FIG.

[0038] That is, as shown in Figures 10 to 13, the joint widening portion 15 is composed of a space portion formed so as to be continuous over the entire area in the longitudinal direction of the edge surface 11 (the up-down direction in Figure 10, the left-right direction in Figures 11 and 12) on the upper edge side of the edge surface 11 located between adjacent receiving members 2 arranged at a predetermined interval along the longitudinal direction of the edge surface 11 extending along the bridge axis direction X of the bridge. The space forming the joint widening portion 15 is configured such that the upper edge corner of the peripheral surface 11 is cut out, for example, with a rectangular cross section to form a space into which the filler 17 is filled. Then, by installing one deck slab and the other deck slab so that the joint widening portion 15 of one deck slab and the joint widening portion 15 of the other deck slab are adjacent to each other along the bridge axis direction X of the bridge, a widening joint 12X (see Figures 8, 10, and 11) is formed on the joint 12 between adjacent receiving members 2 along the direction perpendicular to the bridge axis Y of the bridge, and is partitioned by the joint widening portion 15 of one deck slab and the joint widening portion 15 of the other deck slab.

[0039] The deck 10A according to the third embodiment is manufactured by the following manufacturing method, for example, by placing the receiving member 2, reinforcing bars, and the like in a formwork, and then filling the formwork with concrete. That is, the deck 10A of embodiment 3 is manufactured by a manufacturing method including, for example, a first step of preparing a formwork having joint widening portion cut-out sections that become joint widening portions 15 on the inner surfaces of the four sides of the formwork as inclined surface references (gradient surface references), a second step of pouring concrete into the formwork up to the lowest position of the inclined surface set within the formwork by the joint widening portion cut-out sections to form a flat upper surface, and a third step of forming the upper surface 10a into an inclined surface (gradient surface) by rubbing concrete onto the upper surface in accordance with the inclined surface references when the concrete that forms the flat upper surface has lost its fluidity. The above-mentioned second step of flattening the upper surface and the third step of forming the upper surface 10a into an inclined surface may be performed, for example, manually by an operator. Using this manufacturing method, it is possible to manufacture a deck 10A having an upper surface 10a formed on an inclined surface like the deck 10 in embodiment 1, and a joint widening portion 15 on the upper edge side of the edge surface 11 positioned between the receiving members 2 (i.e., a deck 10A with an inclined upper surface + widening joint portion). As for the formwork for forming the deck, a formwork in which the joint widening portion cut-out section which will become the joint widening portion 15 has been formed in advance may be used as described above, but it is also possible to use a formwork constructed by attaching a square timber or the like which will become the cut-out section for the joint widening portion 15 to the part which will become the joint widening portion 15 on the inner surface of an existing formwork for forming the deck.

[0040] In the deck slab joining structure and deck slab joining method of embodiment 2, if the step between the upper surfaces of adjacent decks is not as small as desired and the gradient of the rubbing slope surface of the rubbing joint is not as gentle as desired, then by using a deck slab 10A having an upper surface 10a and widening joint portion 15 of embodiment 3, the step can be reduced by the widening joint portion 15 and the gradient of the rubbing slope surface of the rubbing joint can be made as gentle as desired.

[0041] The gradient of the upper surface of the rubbing joint formed by rubbing the upper surface of the filler 17 filled in the joints 12 between the edge surfaces 11, 11 of adjacent deck slabs is preferably, for example, 20% or less. If the slope of the upper surface of a rubbing joint is 20% or less, it will be possible to facilitate the construction of the rubbing joint, improve the quality of the subsequent waterproofing work, suppress deterioration of the deck slab, and prevent damage to the rubbing joint during the maintenance stage. In addition, the 20% gradient can be converted into a gradient angle θ as follows: θ=tan -1 (20 / 100)×180 / π=approximately 11.3°. Therefore, for example, in the deck slab joining structure and deck slab joining method of embodiment 2, if the calculation results show that even if the deck slab 10 is used, the slope of the rubbing upper surface of the rubbing joint will not be 20% or less, by using the deck slab 10A of embodiment 3, the step can be reduced by the widening joint portion 15, making it possible to reduce the slope of the rubbing slope surface of the rubbing joint to 20% or less.

[0042] For example, Figure 10 shows an example in which a deck 10ZA having a widening joint portion 15 provided in the deck 10Z is joined to a deck 10A relating to embodiment 3, and Figure 9 shows a rubbing joint 18A formed by rubbing the upper surface of a filler 17 filled in the joint 12 between the edge surfaces 11, 11 of adjacent decks 10ZA and 10A. As shown in Figure 8, the joint widening portion 15 of the deck 10ZA and the joint widening portion 15 of the deck 10A form a widening joint 12X above the joint 12, which has a larger joint width than the joint 12, so the rubbing slope surface of the rubbing joint 18A formed in the widening joint 12X is formed into a rubbing slope surface SA with a gentle slope, as shown in Figure 9. On the other hand, in FIG. 9, if it is assumed that a deck 10Z is installed instead of deck 10ZA and that a deck 10Z is installed instead of deck 10A, as shown in FIG. 16, the rubbing slope surface SZ of the rubbing joint 18Z formed by filling the joint 12 between the decks 10Z and 10Z becomes a rubbing slope surface that is steeper than the rubbing slope surface SA of the rubbing joint 18A shown in FIG. 9. In other words, when the deck 10A having the joint widening portion 15 is used, the gradient of the rubbing gradient surface can be made gentle. Therefore, in the deck slab joining structure and deck slab joining method of embodiment 2, even if the deck slab 10 is used, if the calculation results show that the slope of the rubbing upper surface of the rubbing joint is not less than 20%, by using the deck slab 10A of embodiment 3, the step can be reduced by the widening joint portion 15, making it possible to make the slope of the rubbing slope surface of the rubbing joint less than 20%.

[0043] For example, in the deck slab joining structure and deck slab joining method according to the second embodiment, it is assumed that the joint width of the joint 12 between the deck slab 10Z and the deck slab 10 is 19 mm, and the calculation result shows that the step between the upper surface of the deck slab 10Z and the deck slab 10 is 6 mm. In this case, the gradient of the rubbing slope surface of the rubbing joint formed by filling the joint 12 between the deck slab 10Z and the deck slab 10 with the filler 17 is 32%. In this case, if a deck 10A equipped with a joint widening portion 15 is used instead of the deck 10, the joint width between the upper surface of the deck 10Z and the upper surface of the deck 10A will be widened, so that the gradient of the rubbing slope surface of the rubbing joint can be made gentler, making it possible to make the gradient 20% or less.

[0044] The deck installation example shown in Figure 10 shows an example in which a deck 10ZA with a joint widening portion 15 and a deck 10A with a joint widening portion 15 are installed adjacent to each other. In this example, the joint widening portion 15 of the deck 10ZA and the joint widening portion 15 of the deck 10A are adjacent to each other, making the joint width larger, which increases the effect of making the gradient of the rubbing slope surface of the rubbing joint gentler. In addition, instead of the deck 10ZA on the left side of Fig. 10, a deck 10Z or deck 10 may be installed, and a deck 10A equipped with a joint widening portion 15 may be installed adjacent to the deck 10Z or deck 10. Even in this case, the joint width is increased by the joint widening portion 15 of the deck 10A, so that the gradient of the rubbing slope surface of the rubbing joint can be made gentler.

[0045] EMBODIMENT 4 The joint widening portion 15 may be a joint widening portion formed by a cutout having a triangular cross section, or a joint widening portion formed by a cutout having an arc-shaped cross section. That is, the deck slab of embodiment 4 is configured with an upper surface 10a formed on a compound inclined surface, and a joint widening portion formed by a cutout having a triangular cross section, or a joint widening portion formed by a cutout having an arc-shaped cross section (1 / 4 arc). In the deck slab joining structure and deck slab joining method of embodiment 2, if the step between the upper surfaces of adjacent decks is not as small as desired and the gradient of the rubbing slope surface of the rubbing joint is not as gentle as desired, then by using a deck slab having an upper surface 10a and widening joint portion 15 of embodiment 4, the step can be reduced by the widening joint portion 15 and the gradient of the rubbing slope surface of the rubbing joint can be made the desired gentle gradient (for example, a gradient of 20% or less).

[0046] The size of the above-mentioned joint widening portion 15 is preferably set as follows. For example, the depth dimension of the joint widening portion, which is the vertical distance from the same plane as the upper surface 10a of the deck slab 10A or the upper surface 10t of the deck slab 10ZA to the lower end of the joint widening portion, is set to less than 1 / 2 the thickness dimension of the deck slab, and further, the width dimension of the joint widening portion, which is the horizontal distance from the same vertical plane as the edge surface 11 of the deck slab 10A or the deck slab 10ZA to the upper end of the joint widening portion, is set to less than 100 mm. In other words, if the depth dimension of the joint widening portion is 1 / 2 the thickness dimension of the deck (plate thickness dimension), the shear resistance of the filler 17 filled in the joint widening portion can be made approximately equal to the shear resistance of the deck portion located below the joint widening portion. However, if the depth dimension of the joint widening portion exceeds half the thickness dimension of the deck slab, the shear resistance of the deck portion located below the joint widening portion may become smaller than the shear resistance of the filling material filled in the joint widening portion, so it is preferable that the depth dimension of the joint widening portion be limited to a maximum of 100 mm. For the above reasons, the depth dimension of the joint widening portion is set to less than half the thickness dimension of the deck slab. The optimum range of the depth of the joint widening portion is 20 mm to 40 mm. In other words, it is preferable to set the depth of the joint widening portion to 20 mm to 40 mm, since it is possible to use filler 17 mixed with aggregate and it is easy to ensure the integrity of the filler 17 and the deck slab. In addition, it is desirable that the minimum value of the depth dimension of the joint widening portion be the dimension necessary for adhesion of the filler material 17, and it is desirable that the maximum value of the depth dimension of the joint widening portion be a dimension less than the cover thickness of the reinforcing bar. If the width dimension of the joint widening portion is 100 mm, it becomes easy to set the gradient of the rubbing slope surface between the deck slabs to the desired gradient, for example, to 20% or less, as described below, so it is sufficient if the upper limit of the width dimension of the joint widening portion is 100 mm. For the above reasons, the width dimension of the joint widening portion is set to 100 mm or less. The optimum range for the width of the joint widening portion is 50 mm or less. In other words, it is preferable to set the width of the joint widening portion to 50 mm or less, since this makes it easier to ensure the rebar cover. Furthermore, the minimum width dimension of the joint widening portion is not particularly limited as long as it can increase the joint width.

[0047] In addition, Figures 4, 6, 8, 9, and 16 show a state in which the vertical positions (levels) of the undersides of the left and right deck slabs are not aligned between the left and right deck slabs, but in the deck slab joint structure of the present invention, the vertical positions (levels) of the undersides of the left and right deck slabs may not be aligned between the left and right deck slabs, or they may be aligned between the left and right deck slabs.

[0048] EMBODIMENT 5 As shown in FIG. 14, the deck 10B of the fifth embodiment is configured such that, for one of the four vertices 10d1, 10d2, 10d3, and 10d4 on the upper surface (e.g., vertex 10d1), the vertical distance from the lower surface 10b to the vertex (e.g., H1) is set to a reference height, and for the other of the four vertices 10d1, 10d2, 10d3, and 10d4 on the upper surface (e.g., vertices 10d2, 10d3, and 10d4), the vertical distance from the lower surface 10b to the vertex (e.g., H2, H3, and H4) is set to a position higher than the reference height, and the upper surface 10a is an inclined surface 10SB that slopes upward from the one vertex toward the other vertices.

[0049] EMBODIMENT 6 As shown in FIG. 15, the deck 10C of the sixth embodiment has four vertices 10d1, 10d2, 10d3, and 10d4 on the upper surface, of which three (e.g., vertices 10d1, 10d2, and 10d4) have a vertical distance from the lower surface 10b to the vertex (e.g., H1, H2, and H4) set to a reference height, and the other one (e.g., vertex 10d3) has a vertical distance from the lower surface 10b to the vertex (e.g., H3) set to a position higher than the reference height, and the upper surface 10a is an inclined surface 10SC that slopes upward from the three vertices toward the other vertices.

[0050] In other words, the deck 10B of embodiment 5 and the deck 10C of embodiment 6 are decks in which the upper edge of at least one of a pair of edge surfaces 11, 11 that will extend along the direction perpendicular to the bridge axis Y of the bridge when installed on a girder is formed as an inclined upper edge (inclined upper edge S1 or inclined upper edge S2) that is inclined toward the lower surface, and the upper surface 10a is an inclined surface (inclined surface 10SB or inclined surface 10SC) that inclines from the inclined upper edge toward the other upper edge.

[0051] EMBODIMENT 7 The deck may be configured so that the deck 10B of embodiment 5 is provided with the above-mentioned joint widening portion 15, or the deck 10C of embodiment 6 is provided with the above-mentioned joint widening portion 15.

[0052] Even with the deck slabs related to embodiments 5 to 7, depending on the bridge configuration, it is possible to eliminate or reduce the step between the deck slabs and to make the gradient of the rubbing slope surface of the rubbing joint gentler, which makes it possible to facilitate the construction of the rubbing joint, improve the quality of the subsequent waterproofing work, suppress deterioration of the deck slabs, and prevent damage to the rubbing joint during the maintenance stage.

[0053] The deck according to the present invention is used, for example, when the interval between adjacent decks (joint width of the joints 12) is 10 mm to 40 mm. And, when the calculation result of the step between the upper surfaces of the adjacent decks is, for example, less than 5 mm, the deck according to the present invention is not used, but the deck 10Z described in the conventional example is used. That is, when the interval between the adjacent decks is 10 mm to 40 mm and the step between the upper surfaces of the adjacent decks is less than 5 mm, the gradient of the rubbing gradient surface between the adjacent decks 10Z, 10Z can be made 20% or less in many cases without taking any measures. Furthermore, when the calculation result of the step between the upper surfaces of adjacent deck slabs is, for example, 10 mm or more, by using deck slabs 10, 10A, 10B, 10C, etc. according to the present invention, the step between the upper surfaces of adjacent deck slabs can be eliminated or reduced, and the slope of the contact upper surface of the contact joint between adjacent deck slabs can be reduced to 20% or less. Furthermore, when the calculation result of the difference in height between the upper surfaces of adjacent deck slabs is, for example, 5 mm or more and less than 10 mm, by using deck slab 10ZA (see Figures 8 to 11) configured with joint widening portion 15 provided in deck slab 10Z described in the conventional example, the difference in height between the upper surfaces of adjacent deck slabs can be reduced, and the slope of the contact upper surface of the contact joint between adjacent deck slabs can be reduced to 20% or less.

[0054] Also, for example, half-section construction (lane-specific deck replacement construction) is known, in which the bridge is divided into a first phase of construction 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 of construction in which the deck slabs for the passing lanes are lined up and connected along the bridge axis direction (vehicle travel direction) X. In this half-section construction (lane-specific deck replacement construction), the deck according to the present invention can be used as the deck for the first phase of construction, and the deck according to the present invention can also be used as the deck for the second phase of construction. Even in this case, it will be possible to eliminate the step between the upper surfaces of each deck slab that is installed adjacent to each other along the bridge axis direction X of the bridge in the first and second phases of construction, which will facilitate the construction of the rubbing joints, improve the quality of the waterproofing work in the subsequent process, suppress deterioration of the deck slabs, and prevent damage to the rubbing joints during the maintenance stage.

[0055] In addition, in the embodiment, an example has been shown of a deck slab joint device having one support member such as a C-shaped fitting provided on one deck slab arranged adjacent to each other on the bridge girder, the other support member such as a C-shaped fitting provided on the other deck slab arranged adjacent to each other on the bridge girder, and a connecting member such as an H-shaped fitting that connects the one support member and the other support member, but deck slab joint devices of other configurations, for example, deck slab joint devices of the following configurations, may also be used. In other words, a deck joint device may be used that includes a receiving member, such as a C-shaped fitting, provided on one deck slab that is installed adjacent to the bridge girder, and an engaging member, such as a T-shaped fitting, provided on the other deck slab that is arranged adjacent to the bridge girder, and that connects adjacent deck slabs by engaging the engaging member into a recess in the receiving member. In this case, the deck of the present invention is a deck configured to have a plurality of receiving members, such as C-shaped fittings, which are joint components that constitute the deck slab joint device, or a plurality of fitting members, such as T-shaped fittings, which are joint components that constitute the deck slab joint device, on the edge surface side adjacent to the joint, spaced at a predetermined interval along the longitudinal direction of the edge surface. Alternatively, a deck joint device may be used which includes one receiving member having a recess such as a bolt box provided on one deck slab which is installed adjacent to the bridge girder, another receiving member having a recess such as a bolt box provided on the other deck slab which is arranged adjacent to the bridge girder, and a connecting bolt which is installed across the one bolt box and the other bolt box and serves as a connecting member connecting the one receiving member and the other receiving member. In this case, the deck of the present invention, like the deck described in the embodiment, is a deck configured to have a plurality of receiving members as joint components that constitute the deck joint device on the edge surface side adjacent to the joint, spaced at a predetermined interval along the longitudinal direction of the edge surface.

[0056] In addition, the deck slab of the present invention can also be applied to rectangular plate-shaped reinforced concrete deck slabs that are installed adjacent to each other on the bridge girders via joints and connected by deck slab joint devices called loop joints.

[0057] Furthermore, the deck slab of the present invention may be a deck slab in which the upper plate surface is formed on a surface that is non-parallel to the lower surface (at least the reference lower surface), i.e., the upper plate surface is formed on an inclined surface that is inclined relative to the lower surface (at least the reference lower surface). The deck joining method of the present invention involves calculating the numerical difference in level that would occur between the decks if square decks of equal thickness were installed side by side on top of a bridge girder with a changing cross slope, manufacturing the deck of the present invention based on this numerical difference in level so that it corresponds to the height of the upper surface of the deck that will be installed first, and installing the deck of the present invention adjacent to the previously installed deck along the bridge axis direction with a joint between them, thereby eliminating or reducing the level difference between the decks, and making the gradient of the upper surface of the rubbing joint formed by rubbing the upper surface of the filler filled in the joints between the edge surfaces of adjacent decks 20% or less, for example, thereby making it possible to facilitate the construction of the rubbing joint, improve the quality of waterproofing work in the subsequent process, suppress deterioration of the decks, and prevent damage to the rubbing joint during maintenance and management. [Explanation of symbols]

[0058] 1 Deck joint device, 2 Receiving member (joint component), 10, 10A, 10B, 10C floor slab, 10a upper surface of floor slab, 10b lower surface of floor slab, 10dx Diagonal of the top surface of the deck, 10d1, 10d2, 10d3, 10d4: each vertex of the upper surface of the deck; 10S1, 10S2 inclined surface, S1, S2 inclined upper edge, 11 edge surface of deck, 12 joint, 15 joint widening, X bridge axis direction, Y perpendicular to bridge axis, 17 filler.

Claims

1. A rectangular reinforced concrete deck installed on the bridge girder, A deck slab characterized in that the upper surface of the plate is formed in a plane that is not parallel to the lower surface.

2. Of the four vertices of the upper surface, the two vertices located at both ends of the diagonal line have a vertical distance from the lower surface to the vertices set as a reference height; The other vertices of the four vertices of the upper surface are set at positions where the vertical distance from the lower surface to the vertices is higher than the reference height; 2. The deck according to claim 1, wherein the upper surface is an inclined surface that slopes downward from the other vertex toward the two vertices and the diagonal line.

3. One of the four vertices of the upper surface is set to a reference height, the vertical distance from the lower surface to the vertex; The other vertices of the four vertices of the upper surface are set at positions where the vertical distance from the lower surface to the vertices is higher than the reference height; 2. The deck according to claim 1, wherein the upper surface is an inclined surface that slopes upward from the one vertex toward the other vertex.

4. For three of the four vertices of the upper surface, the vertical distance from the lower surface to the vertices is set to a reference height; The other vertices of the four vertices of the upper surface are set at positions where the vertical distance from the lower surface to the vertices is higher than the reference height; 2. The deck according to claim 1, wherein the upper surface is an inclined surface that slopes upward from the three vertices toward the other vertices.

5. The upper edge of at least one of a pair of edge surfaces that will extend along a direction perpendicular to the bridge axis of the bridge when installed on the girder is formed into an inclined upper edge that is inclined with respect to the lower surface, 2. The deck according to claim 1, wherein the upper surface is an inclined surface that slopes from the inclined upper edge toward the other upper edge.

6. When installed on a girder, the upper edge of one of a pair of edge surfaces extending along a direction perpendicular to the bridge axis of the bridge is formed into one inclined upper edge that is inclined with respect to the lower surface, and when installed on a girder, the upper edge of the other of a pair of edge surfaces extending along a direction perpendicular to the bridge axis of the bridge is formed into the other inclined upper edge that is inclined with respect to the lower surface, The inclination direction of one inclined upper edge is opposite to the inclination direction of the other inclined upper edge, The deck described in claim 1, characterized in that the upper surface is an inclined surface composed of a one-side inclined surface that inclines from a diagonal position connecting the lower vertex of one inclined upper edge and the lower vertex of the other inclined upper edge toward one inclined upper edge, and a other-side inclined surface that inclines from the diagonal position toward the other inclined upper edge.

7. The deck slabs are installed adjacent to each other on the girders along the bridge axis direction of the bridge, with joints between them, and are connected by deck joint devices. A deck slab as claimed in any one of claims 1 to 6, characterized in that a joint widening portion is provided on the upper edge side of the peripheral surface, adjacent to the joint and widening the joint.

8. The deck slabs are installed adjacent to each other on the girders along the bridge axis direction of the bridge, with joints between them, and are connected by deck joint devices. On the edge surface side that extends along the direction perpendicular to the bridge axis of the bridge when installed on the girder, a plurality of joint components that constitute the deck joint device are provided at predetermined intervals along the longitudinal direction of the edge surface, 7. A deck according to claim 1, wherein each joint component member is provided at a position spaced a fixed distance from the upper edge of the edge surface.

9. The deck joint device includes a pair of support members and a connecting member connecting the pair of support members, The deck according to claim 8, characterized in that the joint component member is one of the pair of receiving members.

10. A deck joining method in which decks are installed on girders so that they are adjacent to each other along the bridge axis direction of a bridge with joints in between, and adjacent decks are connected to each other along the bridge axis direction using deck joint devices, and a filler is filled into the joints, A step of calculating a step value that occurs between rectangular deck slabs having the same thickness when the rectangular deck slabs are installed side by side on a girder of a bridge with a variable cross slope; A step of manufacturing the deck according to any one of claims 1 to 6 based on the step value so as to correspond to the height of the upper surface of the deck to be installed first as a deck to be installed later; A step of installing the manufactured deck adjacent to the previously installed deck via a joint along the bridge axis direction; A deck slab joining method comprising:

11. The deck joining method according to claim 10, characterized in that the deck manufactured in the step of manufacturing the deck is installed in a curved portion that curves along the bridge axis direction of the bridge.

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