Floor slab displacement suppressing connection device and lane-specific floor slab replacement method

Abstract

To provide a displacement suppressing connection device for a floor slab, which can more firmly connect a primary floor slab and a secondary floor slab together, which can further improve a relative displacement suppressing effect between the primary floor slab and the secondary floor slab, and which can suppress the occurrence of a crack in a filler filled into a vertical joint and the opening of the vertical joint.SOLUTION: A displacement suppressing connection device 1 for a floor slab for connecting a primary floor slab and a secondary floor slab until a filler filled in a vertical joint formed between the primary floor slab and the secondary floor slab is cured comprises at least one of a floor slab upper surface side connection device 1A and a floor slab lower surface side connection device 1B, and includes a primary side female screw part 2A1 formed in the primary floor slab, a secondary side female screw part 2A2 formed in the secondary floor slab, a connection member installed over the primary and secondary floor slabs, a primary side fastening bolt 8A1 passed through a bolt passing hole formed in the connection member and fastened to the primary side female screw part, and a secondary side fastening bolt 8A2 passed through the bolt passing hole formed in the connection member and fastened to the secondary side female screw part.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a deck displacement suppression connection device that connects a primary deck installed first and a secondary deck installed later in a lane-specific deck replacement construction method in which the deck is divided and installed perpendicular to the bridge axis of the bridge, until the filler filled in the vertical joint formed between the primary deck installed first and the secondary deck installed later hardens. [Background technology]

[0002] In a lane-specific deck replacement construction method in which the deck is divided and installed perpendicular to the bridge axis of a bridge, a deck displacement suppression connection device (erection jigs 10A to 10F) is known that temporarily connects the first deck installed first with the second deck installed later to suppress relative displacement between the first and second decks (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-188506 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the displacement suppression connection device for deck slabs disclosed in Patent Document 1 is a device comprising an upper connecting flat plate installed across the upper plate surface of the primary deck slab and the upper plate surface of the secondary deck slab, a lower connecting flat plate installed across the lower plate surface of the primary deck slab and the lower plate surface of the secondary deck slab, bolts arranged to pass through through holes formed in the upper and lower connecting flat plates and the deck slab, and nuts fastened to the bolts to fix the upper and lower connecting flat plates to the deck slab. In other words, the displacement suppression connection device for deck slabs disclosed in Patent Document 1 is configured so that the bolt passes through a through hole formed in the upper and lower flat plates for connection and the deck slab, and the bolt and deck slab are not firmly fixed together, and the bolt is simply fastened with a nut, resulting in a structure in which the bolt is prone to move and the nut is prone to loosen, resulting in the problem that the primary deck slab and the secondary deck slab cannot be firmly connected. The present invention has been made in consideration of the above-mentioned problems, and provides a displacement suppression connection device for deck slabs that can more firmly connect the primary and secondary deck slabs and further improve the effect of suppressing relative displacement between the primary and secondary deck slabs. [Means for solving the problem]

[0005] The deck displacement restraining connection device of the present invention is a deck displacement restraining connection device that connects a primary deck installed first and a secondary deck installed later in a deck replacement construction method in which the deck is divided and installed in a direction perpendicular to the bridge axis of a bridge until the filler filled in the vertical joints formed between the primary deck installed first and the secondary deck installed later hardens, and the deck displacement restraining connection device is composed of at least one of a deck slab upper surface side connection device and a deck slab lower surface side connection device, and the deck slab upper surface side connection device comprises a primary side female threaded portion provided on the primary deck so as to open onto the upper surface of the edge side of the primary deck, a secondary side female threaded portion provided on the secondary deck so as to open onto the upper surface of the edge side of the secondary deck, and a connection member installed across the upper surface of the edge side of the primary deck and the upper surface of the edge side of the secondary deck; The deck slab underside connection device is configured with a primary side fastening bolt that is passed through a bolt through hole formed in the connecting member and fastened to the primary side female threaded portion, and a secondary side fastening bolt that is passed through a bolt through hole formed in the connecting member and fastened to the secondary side female threaded portion, and is characterized in that it is configured with a primary side female threaded portion provided on the primary deck slab so as to open to the underside of the edge side of the primary deck slab, a secondary side female threaded portion provided on the secondary deck slab so as to open to the underside of the edge side of the secondary deck slab, a connecting member installed across the underside of the edge side of the primary deck slab and the underside of the edge side of the secondary deck slab, a primary side fastening bolt that is passed through a bolt through hole formed in the connecting member and fastened to the primary side female threaded portion, and a secondary side fastening bolt that is passed through a bolt through hole formed in the connecting member and fastened to the secondary side female threaded portion. The deck displacement restraining connection device according to the present invention is a deck displacement restraining connection device that connects a first deck slab that has been installed earlier and a second deck slab that will be installed later, in a deck slab replacement construction method in which the deck slab is divided and installed in a direction perpendicular to the bridge axis of the bridge, until a filler filled in a vertical joint formed between the first deck slab that has been installed earlier and the second deck slab that will be installed later hardens, and the deck displacement restraining connection device is composed of at least one of a deck slab upper surface side connection device and a deck slab lower surface side connection device, and The side connection device includes a primary side female threaded portion provided on the primary deck slab so as to open onto the upper surface of the edge side of the primary deck slab, a secondary side female threaded portion provided on the secondary deck slab so as to open onto the upper surface of the edge side of the secondary deck slab, a connection member installed across the upper surface of the edge side of the primary deck slab and the upper surface of the edge side of the secondary deck slab, a primary side bolt having one end threaded into the primary side female threaded portion and the other end passed through a bolt through hole formed in the connection member, and a primary side nut fastened to the other end of the primary side bolt that has passed through the bolt through hole. a secondary bolt having one end threaded into the secondary female thread portion and the other end passed through a bolt through hole formed in the connecting member; and a secondary nut fastened to the other end of the secondary bolt that has passed through the bolt through hole. The deck underside connection device is configured with a primary female thread portion provided in the primary deck so as to open to the underside of the edge side of the primary deck, a secondary female thread portion provided in the secondary deck so as to open to the underside of the edge side of the secondary deck, and a a connecting member installed across the underside of the connecting member; a primary bolt having one end threaded into the primary female threaded portion and the other end passed through a bolt-through hole formed in the connecting member; a primary nut fastened to the other end of the primary bolt that has passed through the bolt-through hole; a secondary bolt having one end threaded into the secondary female threaded portion and the other end passed through a bolt-through hole formed in the connecting member; and a secondary nut fastened to the other end of the secondary bolt that has passed through the bolt-through hole. In addition, the connecting member of the deck slab upper surface connection device is composed of a primary side support member installed on the upper surface of the edge side of the primary deck slab, a secondary side support member installed on the upper surface of the edge side of the secondary deck slab, and a connecting member connecting the primary side support member and the secondary side support member, and the connecting member of the deck slab lower surface connection device is composed of a primary side support member installed on the underside of the edge side of the primary deck slab, a secondary side support member installed on the underside of the edge side of the secondary deck slab, and a connecting member connecting the primary side support member and the secondary side support member, and the primary side fastening bolt is passed through a bolt through hole formed in the primary side insertion portion of the connecting member and the primary side support member and fastened to the primary side female thread portion, and the secondary side fastening bolt is passed through a bolt through hole formed in the secondary side insertion portion of the connecting member and the secondary side support member and fastened to the secondary side female thread portion. Further, the connecting member of the deck slab upper surface side connecting device is configured to include a primary side support member installed on the upper surface of the edge side of the primary deck slab, a secondary side support member installed on the upper surface of the edge side of the secondary deck slab, and a connecting member connecting the primary side support member and the secondary side support member, and the connecting member of the deck slab lower surface side connecting device is configured to include a primary side support member installed on the lower surface of the edge side of the primary deck slab, a secondary side support member installed on the lower surface of the edge side of the secondary deck slab, and a connecting member connecting the primary side support member and the secondary side support member, and the primary side bolt One end of the bolt is threaded into the primary side female threaded portion and the other end is passed through a bolt-through hole formed in the primary side receiving member and the primary side insertion portion of the connecting member, and a primary side nut is fastened to the other end of the primary side bolt that has passed through the bolt-through hole, and one end of the secondary side bolt is threaded into the secondary side female threaded portion and the other end is passed through a bolt-through hole formed in the secondary side receiving member and the secondary side insertion portion of the connecting member, and a secondary side nut is fastened to the other end of the secondary side bolt that has passed through the bolt-through hole. The connecting member of the deck slab upper surface side connecting device is configured to include a primary side support member installed on the upper surface of the edge side of the primary deck slab, a secondary side support member installed on the upper surface of the edge side of the secondary deck slab, and a connecting member connecting the primary side support member and the secondary side support member, and the connecting member of the deck slab lower surface side connecting device is configured to include a primary side support member installed on the lower surface of the edge side of the primary deck slab, a secondary side support member installed on the lower surface of the edge side of the secondary deck slab, and a connecting member connecting the primary side support member and the secondary side support member, and a primary side bolt passed through a bolt through hole formed in the primary side support member. and a secondary receiving member fixing nut fastened to the other end of a secondary bolt passed through a bolt-through hole formed in the secondary receiving member to fix the secondary receiving member to the secondary bolt, wherein the primary nut is fastened to the other end of the primary bolt passed through a bolt-through hole formed in the primary insertion portion of the connecting member, and the secondary nut is fastened to the other end of the secondary bolt passed through a bolt-through hole formed in the secondary insertion portion of the connecting member. The present invention is also characterized by including a spacer provided on the primary receiving member or the secondary receiving member so as to be positioned between the primary receiving member and the secondary receiving member. The connecting members of the deck slab upper surface side connecting device and the connecting members of the deck slab lower surface side connecting device are characterized by being made of structural steel. The structural steel is an H-shaped steel, and a bolt hole is formed in one flange of the H-shaped steel. The displacement-restraining connection device for a deck slab is characterized by being configured with a deck slab upper surface side connection device and a deck slab lower surface side connection device. The lane-specific deck replacement method using deck displacement suppression connection devices involves the first step of fabricating primary decks with primary side female threads, installing these primary decks in a line along the bridge axis direction, and joining adjacent primary decks along the bridge axis direction using deck joint devices to complete the primary side lane; the second step of fabricating secondary decks with secondary side female threads and installing the secondary decks in a line with the existing primary decks via vertical joints along the direction perpendicular to the bridge axis; and the second step of fabricating secondary decks with secondary side female threads and installing the secondary decks in a line with the existing primary decks via vertical joints along the direction perpendicular to the bridge axis. a third step of connecting the secondary deck slab and the existing primary deck slab using a connecting device; a fourth step of filling the vertical joints between the secondary deck slab and the existing primary deck slab with a filler material after the third step; and a fifth step of removing the deck slab displacement suppression connection device after the filler material has hardened after the fourth step. The third step is to install primary-side support members on the upper surface of the edge side of the primary deck slabs that are lined up via vertical joints along the direction perpendicular to the bridge axis, and to install secondary-side support members on the upper surface of the edge side of the secondary deck slab, thereby connecting the primary-side support members and the secondary-side support members. After installing the connecting members that connect the above, the primary side fastening bolts are passed through the bolt through holes formed in the primary side insertion part of the connecting member and the primary side receiving member and fastened to the primary side female threaded part, and the secondary side fastening bolts are passed through the bolt through holes formed in the secondary side insertion part of the connecting member and the secondary side receiving member and fastened to the secondary side female threaded part, and the deck slab upper surface side connecting step that constitutes the deck slab upper surface side connecting device, and the primary side receiving members are installed on the underside of the edge side of the primary deck slabs that are lined up via vertical joints along the direction perpendicular to the bridge axis, and the secondary deck slab a secondary-side support member is installed on the underside of the connecting member, a connecting member is installed to connect the primary-side support member and the secondary-side support member, and then a primary-side fastening bolt is passed through a bolt-through hole formed in the primary-side insertion portion of the connecting member and the primary-side support member and fastened to the primary-side female threaded portion, and a secondary-side fastening bolt is passed through a bolt-through hole formed in the secondary-side insertion portion of the connecting member and the secondary-side support member and fastened to the secondary-side female threaded portion, thereby comprising at least one of the deck slab underside connecting steps that constitute the deck slab underside connecting device. In addition, the third step involves screwing one end of the primary bolt into the primary female threaded portion that opens onto the upper surface of the edge side of the primary deck slab, and screwing one end of the secondary bolt into the secondary female threaded portion that opens onto the upper surface of the edge side of the secondary deck slab, and then passing the other end of the primary bolt through the bolt through hole of the primary support member to install the primary support member on the upper surface of the edge side of the primary deck slab, and passing the other end of the secondary bolt through the bolt through hole of the secondary support member to install the secondary support member on the upper surface of the edge side of the secondary deck slab. Then, the other end of the primary bolt is passed through a bolt through hole formed in the primary insertion portion of the connecting member, and the other end of the secondary bolt is passed through a bolt through hole formed in the secondary insertion portion of the connecting member. Then, a primary nut is fastened to the other end of the primary bolt that has passed through the bolt through hole, and a secondary nut is fastened to the other end of the secondary bolt that has passed through the bolt through hole. This completes the deck slab top surface connecting step and the deck slab top surface connecting step that constitute the deck slab top surface connecting device. One end of the secondary bolt is screwed into a primary female threaded portion that opens onto the underside of the edge of the primary deck slab, and one end of the secondary bolt is screwed into a secondary female threaded portion that opens onto the underside of the edge of the secondary deck slab.Then, the other end of the primary bolt is passed through the bolt through hole of the primary receiving member to install the primary receiving member on the underside of the edge of the primary deck slab, and the other end of the secondary bolt is passed through the bolt through hole of the secondary receiving member to install the secondary receiving member on the underside of the edge of the secondary deck slab.Then, the other end of the primary bolt is passed through a bolt through hole formed in the primary insertion portion of the connecting member, and the other end of the secondary bolt is passed through a bolt through hole formed in the secondary insertion portion of the connecting member.After that, a primary nut is fastened to the other end of the primary bolt that has passed through the bolt through hole, and a secondary nut is fastened to the other end of the secondary bolt that has passed through the bolt through hole, thereby comprising at least one of the deck slab underside connecting steps that constitute the deck slab underside connecting device. In addition, the third step involves screwing one end of the primary bolt into a primary female threaded portion that opens onto the upper surface of the edge side of the primary deck slab, and screwing one end of the secondary bolt into a secondary female threaded portion that opens onto the upper surface of the edge side of the secondary deck slab, and then passing the other end of the primary bolt through the bolt through hole of the primary support member and fastening a primary support member fixing nut to the other end of the primary bolt, thereby fixing the primary support member to the upper surface of the edge side of the primary deck slab, and passing the other end of the secondary bolt through the bolt through hole of the secondary support member and fastening a secondary support member to the other end of the secondary bolt. After the secondary-side receiving member is fixed to the upper surface of the edge side of the secondary deck slab by fastening the fixing nut, the other end of the primary-side bolt is passed through the bolt-through hole formed in the primary-side insertion part of the connecting member, and the other end of the secondary-side bolt is passed through the bolt-through hole formed in the secondary-side insertion part of the connecting member, and then the primary-side nut is fastened to the other end of the primary-side bolt that has passed through the bolt-through hole, and the secondary-side nut is fastened to the other end of the secondary-side bolt that has passed through the bolt-through hole. One end of the bolt is screwed into the primary female threaded portion that opens onto the underside of the edge of the primary deck slab, and one end of the secondary bolt is screwed into the secondary female threaded portion that opens onto the underside of the edge of the secondary deck slab. After that, the other end of the primary bolt is passed through the bolt through hole of the primary support member and a primary support member fixing nut is fastened to the other end of the primary bolt, thereby fixing the primary support member to the underside of the edge of the primary deck slab. At the same time, the other end of the secondary bolt is passed through the bolt through hole of the secondary support member and a secondary support member fixing nut is fastened to the other end of the secondary bolt, thereby fixing the primary support member to the underside of the edge of the primary deck slab. After fixing the secondary support member to the underside of the edge side of the next deck slab, the other end of the primary bolt is passed through a bolt through hole formed in the primary insertion portion of the connecting member, and the other end of the secondary bolt is passed through a bolt through hole formed in the secondary insertion portion of the connecting member, and then a primary nut is fastened to the other end of the primary bolt that has passed through the bolt through hole, and a secondary nut is fastened to the other end of the secondary bolt that has passed through the bolt through hole, thereby comprising at least one of the deck slab upper surface side connecting steps that constitute the deck slab upper surface side connecting device. In addition, the third step is to screw one end of the primary bolt into the primary female threaded portion that opens onto the top surface of the edge side of the primary deck slab, and to screw one end of the secondary bolt into the secondary female threaded portion that opens onto the top surface of the edge side of the secondary deck slab, and then pass the other end of the primary bolt through the bolt through hole of one flange of the H-shaped steel on the top surface of the edge side of the primary deck slab, and pass the other end of the secondary bolt through the bolt through hole of one flange of the H-shaped steel on the top surface of the edge side of the secondary deck slab, thereby installing one flange of the H-shaped steel across the top surface of the edge side of the primary deck slab and the top surface of the edge side of the secondary deck slab, and then fasten a primary nut to the other end of the primary bolt that has passed through the bolt through hole, and fasten a secondary nut to the other end of the secondary bolt that has passed through the bolt through hole, thereby forming a deck slab top side connecting step that constitutes a deck slab top side connecting device, and One end of the primary bolt is screwed into the primary female threaded portion opening onto the underside of the edge side of the primary deck slab, and one end of the secondary bolt is screwed into the secondary female threaded portion opening onto the underside of the edge side of the secondary deck slab.Then, the other end of the primary bolt is passed through the bolt through hole of one flange of the H-shaped steel on the underside of the edge side of the primary deck slab, and the other end of the secondary bolt is passed through the bolt through hole of one flange of the H-shaped steel on the underside of the edge side of the secondary deck slab, thereby installing one flange of the H-shaped steel across the underside of the edge side of the primary deck slab and the underside of the edge side of the secondary deck slab.Then, a primary nut is fastened to the other end of the primary bolt that has passed through the bolt through hole, and a secondary nut is fastened to the other end of the secondary bolt that has passed through the bolt through hole, thereby providing at least one of the deck slab underside connecting steps that constitute the deck slab underside connecting device. According to the present invention, it is possible to provide a displacement suppression connection device for deck slabs that can more firmly connect the primary and secondary deck slabs, further improve the effect of suppressing relative displacement between the primary and secondary deck slabs, and suppress the occurrence of cracks in the filler material filled in the vertical joints and opening of the vertical joints.In addition, by using this displacement suppression connection device for deck slabs, it is possible to realize a lane-specific deck slab replacement construction method with high construction quality. [Brief explanation of the drawings]

[0006] [Figure 1]FIG. 10 is a plan view showing the situation of lane-specific deck replacement work using a deck displacement suppression connection device (first embodiment). [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 (first embodiment). [Figure 3] 3 is an enlarged cross-sectional view of the displacement-restraining connection device for deck slabs shown in FIG. 2 (Embodiment 1). FIG. [Figure 4] FIG. 2 is an exploded perspective view showing the deck slab upper surface side connection device (first embodiment). [Figure 5] FIG. 2 is an exploded perspective view showing the deck slab underside connection device (first embodiment). [Figure 6] 1A and 1B show a deck slab joint device, in which FIG. 1A is an exploded perspective view and FIG. 1B is a perspective view (embodiment 1). [Figure 7] FIG. 10 is an enlarged cross-sectional view of a displacement suppression connection device for a deck slab (embodiment 2). [Figure 8] FIG. 10 is an enlarged cross-sectional view of the deck slab upper surface side connection device (embodiment 3). [Figure 9] FIG. 10 is an exploded perspective view showing the deck slab upper surface side connection device (Embodiment 3). [Figure 10] 10A and 10B are diagrams showing a displacement-restraining connection device for a deck slab, in which (a) is a plan view, (b) is a cross-sectional view taken along line AA in (a), and (c) is a cross-sectional view taken along line BB in (a) (Embodiment 4). DETAILED DESCRIPTION OF THE INVENTION

[0007] Embodiment 1 In road bridge deck replacement work, lane-specific deck replacement work is known, in which the deck is divided and installed perpendicular to the bridge axis of the bridge. In this lane-specific deck replacement work, as shown in Figure 1, a filler 17 such as non-shrinkage mortar is filled into the vertical joints 15 formed between the first deck 10P (10) installed first and the second deck 10S (10) installed later. In this case, since the lane formed by the previously installed primary deck slabs 10P, 10P... is already in use as a road, if the primary deck slab 10P and the secondary deck slab 10S are not connected and filler 17 is filled into the vertical joints 15, the primary deck slab 10P will vibrate when a vehicle passes through the lane formed by the primary deck slabs 10P, 10P..., causing relative displacement between the primary deck slab 10P and the secondary deck slab 10S, which could result in cracks in the filler 17 filled into the vertical joints 15 or openings in the vertical joints 15. Therefore, in embodiment 1, a displacement suppression connection device 1 for decks is provided that is configured to connect a primary deck 10P that has been installed first and put into use as a road with a secondary deck 10S that will be installed later, and is a temporary connection device that is removed after the filler material 17 filled in the vertical joints 15 formed in the primary deck 10P and the secondary deck 10S has hardened, and can more firmly connect the primary deck 10P and the secondary deck 10S. In other words, the displacement suppression connection device 1 for a deck slab functions as a temporary connection device for temporarily connecting the primary deck slab 10P and the secondary deck slab 10S until the filler material 17 filled in the vertical joints 15 formed between the primary deck slab 10P and the secondary deck slab 10S hardens, and the displacement suppression connection device 1 for a deck slab can more firmly connect the primary deck slab 10P and the secondary deck slab 10S, improve the relative displacement suppression effect between the primary deck slab 10P and the secondary deck slab 10S, and suppress cracks in the filler material 17 and openings in the vertical joints 15.

[0008] In lane-specific deck replacement work, for example, the work is carried out in two separate phases: a first phase in which multiple decks for the driving lanes are lined up and connected along the bridge axis (direction of vehicle travel), and a second phase in which multiple decks for the passing lanes are lined up and connected along the bridge axis (direction of vehicle travel). In other words, the existing deck that made up the passing lane before the second phase of construction will remain in use as a road, while the existing deck that made up the driving lane, which is the part of the first phase of construction, will be removed, and the first phase of construction will be carried out to install a new deck in the removed area, completing a new driving lane within the planned first phase of construction. After that, the completed deck that makes up the new driving lane will be put into service as a road, and the existing deck that made up the passing lane before the second phase of construction will be removed.The second phase of construction will then be carried out to install a new deck in the removed area, completing the new passing lane within the planned second phase of construction area. In this case, in order to form a new driving lane during the first phase of construction, the deck slabs that are installed adjacent to each other along the bridge axis direction via horizontal joints are connected and joined using the deck slab joint device 1X described below, thereby forming a new driving lane within the planned first phase of construction area and opening it to the public as a road. In this way, the multiple decks that will be installed first and put into service as a road are the primary decks 10P, 10P, ... shown in Figure 1. Next, in order to form a new passing lane in the second phase of construction, the secondary deck slab 10S is installed adjacent to the primary deck slab 10P via a vertical joint 15 along the direction perpendicular to the bridge axis Y, as shown in Figure 1. In this way, the primary deck 10P and secondary deck 10S, which are installed adjacent to each other via a vertical joint 15 along the direction Y perpendicular to the bridge axis, are temporarily connected using the deck displacement suppression connection device 1 of embodiment 1, and then the vertical joint 15 is filled with filler material 17.After the filler material 17 has hardened, the deck displacement suppression connection device 1 is detached and removed. As a result, the secondary deck 10S becomes an existing secondary deck joined to the primary deck 10P. Then, the next secondary deck 10P is installed adjacent to the existing secondary deck 10S along the bridge axis direction X via a horizontal joint 16, and the existing secondary deck 10S and the next secondary deck 10P are connected and joined using a deck joint device 1X. Furthermore, the adjacent primary deck slab 10P and the secondary deck slab 10S are temporarily connected via a vertical joint 15 along the direction Y perpendicular to the bridge axis using a deck displacement suppression connection device 1, and then a filler 17 is filled into the vertical joint 15 formed between the adjacent primary deck slab 10P and secondary deck slab 10S along the direction Y perpendicular to the bridge axis, and after the filler 17 has hardened, the deck displacement suppression connection device 1 is detached and removed. In the same way, by joining the new secondary deck slabs 10S one by one, the passing lane within the planned second phase of construction will be completed.

[0009] First, the configuration of the above-mentioned deck slab joint device 1X will be described with reference to FIGS. As shown in FIG. 1, the deck joint device 1X is a connection device for connecting adjacent deck slabs 10P, 10P via horizontal joints 16 along the bridge axis direction X, or for connecting adjacent deck slabs 10S, 10S via horizontal joints 16 along the bridge axis direction X. In the following description of the deck slab joint device 1X, the primary deck slab 10P and the secondary deck slab 10S will be described as the deck slab 10. As shown in Figure 1, the deck joint device 1X is a connection device for connecting adjacent decks 10 and 10 via a horizontal joint 16 along the bridge axis direction X, and is composed of a support member 2 provided on one deck slab 10, a support member 2 provided on the other deck slab 10, and a connecting member 3 connecting these support members 2, 2. In other words, the deck joint device 1X is configured to include, for example, one support member 2 such as a C-shaped metal piece provided on one deck slab 10 arranged adjacent to each other on the bridge girder along the bridge axis direction X via a horizontal joint 16, another support member 2 such as a C-shaped metal piece provided on the other deck slab 10 arranged adjacent to each other on the bridge girder along the bridge axis direction X via a horizontal joint 16, and a connecting member 3 such as an H-shaped metal piece that connects the one support member 2 and the other support member 2, and is a joint device known as a cotter-type joint characterized by the wedge function provided by the pair of support members 2, 2 and the connecting member 3.

[0010] Hereinafter, the deck slab joint device 1X will be described in detail with reference to FIG. In the description of the deck slab joint device 1X, up, down, left, right, front, and rear will be defined as directions shown in FIG. As shown in Figure 6(a), the receiving member 2 has an engaged portion 5 having an engaging recess 4 with which the connecting member 3 engages, and an anchoring portion 6 that is anchored to the concrete of the deck slab 10 in order to anchor the engaged portion 5 to the concrete of the deck slab 10. The material of the receiving member 2 is not particularly limited, but for example, it is made of a one-piece molded product such as steel in which the engaged portion 5 and the fixed portion 6 are integrally molded by pouring cast iron into a mold not shown. As shown in Figure 6(a), the connecting member 3 has one engaging portion 7 that engages with the engaging recess 4 of one of the receiving members 2, the other engaging portion 7 that engages with the engaging recess 4 of the other receiving member 2, and a connecting portion 8 that connects the one engaging portion 7 and the other engaging portion 7. The material of the connecting member 3 is not particularly limited, but for example, it may be made of a one-piece molded product such as steel, in which cast iron is poured into a formwork not shown in the figure and one engaging portion 7, the other engaging portion 7, and the connecting portion 8 are molded as a single unit.

[0011] The engaged portion 5 comprises a front wall portion 52, a left wall portion 53L extending rearward from the left end of the front wall portion 52, a right wall portion 53R extending rearward from the right end of the front wall portion 52, a bottom portion 51 extending rearward from the lower end of the front wall portion 52, and a rear wall portion 54 extending from the rear ends of the bottom portion 51, the left wall portion 53L, and the right wall portion 53R, and is configured with an upper-opening engaging recess 4 surrounded by the front wall portion 52, the left wall portion 53L, the right wall portion 53R, the bottom 51, and the rear wall portion 54. In other words, the engaged portion 5 comprises a bottom 51, a rear wall portion 54 that rises from the rear edge side of the bottom 51, a left wall portion 53L and a right wall portion 53R that extend from both the left and right sides of the rear wall portion 54 and rise from the left and right edges of the bottom 51, and a front wall portion 52 that extends from the front ends of the left wall portion 53L and the right wall portion 53R and rises from the front edge side of the bottom 51.

[0012] The engaged portion 5 has an upper opening facing the bottom 51 and an engaging portion insertion opening 41 (upper opening of the engaging recess 4) which serves as an insertion port for inserting the engaging portion 7 of the connecting member 3 into the engaging recess 4, and the front wall portion 52 has a connecting portion insertion groove 42 which serves as an insertion groove of the upper opening for inserting the connecting portion 8 of the connecting member 3. The opening 41 for inserting the engagement portion is an upper opening surrounded by the upper end of the front wall portion 52, the upper end of the left wall portion 53L, the upper end of the right wall portion 53R, and the upper end of the rear wall portion 54, and is formed by an opening that allows the engagement portion 7 of the connecting member 3 to be inserted into the engagement recess 4 from above. The front wall portion 52 is a wall body having a front wall surface 52a that is exposed to the edge surface 11 when the receiving member 2 is installed on the edge surface 11 side of the deck slab 10, and has the above-mentioned connecting portion insertion groove 42 for inserting the connecting portion 8 of the connecting member 3. That is, the front wall portion 52 is configured to have a front wall surface 52 a as a wall surface positioned on the same plane as or parallel to the edge surface 11 of the deck slab 10 . The connecting portion insertion groove 42 is an upper-opening groove that extends continuously in the vertical direction from the upper end side of the front wall portion 52 to the bottom portion 51 side in the central portion between the left and right sides of the front wall portion 52, and is formed with a groove width that allows the connecting portion 8 of the connecting member 3 to be inserted from above. In addition, the left wall portion 53L, the right wall portion 53R, and the rear wall portion 54 are each configured with a convex portion 59 on their outer surfaces, and since these left wall portion 53L, the right wall portion 53R, and the rear wall portion 54 are configured with the convex portions 59, the receiving member 2 is configured to improve the adhesion between the engaged portion 5 and the concrete of the deck slab 10, and the punching shear resistance of the engaged portion 5.

[0013] Furthermore, the front wall surface 52a of the front wall portion 52 of the engaged portion 5 in one of the receiving members 2, or the front wall surface 52a of the front wall portion 52 of the engaged portion 5 in the other receiving member 2, is provided with a spacer 4A corresponding to the dimensions of the gap that will become, for example, the horizontal joint 16. For example, when a spacer 4A is provided on the front wall surface 52a of the other receiving member 2 located on the lower left side of Figure 6(a), the spacer 4A is configured to include 4AL provided on the front wall surface 52a located on the left side of the connecting portion insertion groove 42, and 4AR provided on the front wall surface 52a located on the right side of the connecting portion insertion groove 42.

[0014] The fixing portion 6 comprises a left fixing member 6L and a right fixing member 6R, the left fixing member 6L being arranged to extend rearward from the left end side of the rear wall portion 54, and the right fixing member 6L being arranged to extend rearward from the right end side of the rear wall portion 54. The left fixing member 6L is arranged so as to extend and curve from a base end located on the left end side of the rear wall portion 54 toward an extended end, and similarly, the right fixing member 6R is arranged so as to extend and curve from a base end located on the right end side of the rear wall portion 54 toward an extended end. That is, the left fixing member 6L and the right fixing member 6R are configured so that the extension ends thereof are bent and extend in directions away from each other. The fixing members 6L and 6R are formed, for example, in the shape of a rod having protrusions on the outer periphery thereof.

[0015] The engaging portion 7 of the connecting member 3 is configured, for example, to have an outer peripheral wall facing the inner peripheral wall of the engaging recess 4, and is provided with a fixing portion 72 having an outer wall surface 71 on the front surface of the rear wall portion 54 facing the rear inner wall surface of the engaging recess 4 and the left and right inner wall surfaces of the engaging recess 4 which are the inner surfaces of the left and right wall portions 53L, 53R, and a wall portion 74 having an engaging wall surface 73 facing the front inner wall surface 52b of the engaging recess 4 which is the rear surface of the front wall portion 52.

[0016] Furthermore, bolt holes for passing fixing bolts (not shown) are formed in the fixing portions 72 of the engaging portions 7. That is, the fixing portion 72 of one engaging portion 7 has a bolt hole 6A1 formed therein, and the fixing portion 72 of the other engaging portion 7 has a bolt hole 6A2 formed therein. Furthermore, bolt fastening holes for fastening fixing bolts (not shown) are formed in the bottom 51 of the engaged portion 5. That is, a bolt fastening hole 6A3 is formed in the bottom 51 of the engaged portion 5 of one of the receiving members 2, and a bolt fastening hole 6A4 is formed in the bottom 51 of the engaged portion 5 of the other receiving member 2. The bolt fastening holes 6A3 and 6A4 are formed, for example, by female threaded through holes.

[0017] The above-described deck slab joint device 1X connects adjacent deck slabs 10 to each other via horizontal joints 16 along the bridge axis direction X. That is, the receiving members 2, 2 provided so as to face each other on the opposing edge faces 11, 11 of the deck slabs 10, 10 installed adjacent to each other via horizontal joints 16 are connected by the connecting members 3. In other words, from above each engaging recess 4,4 of each engaged portion 5,5 of each opposing receiving member 2,2, each engaging portion 7,7 of the connecting member 3 is inserted into each engaging recess 4,4 through the engaging portion insertion opening 41 at the top of each engaging recess 4,4, and the connecting portion 8 of the connecting member 3 is inserted into the connecting portion insertion groove 42 of each engaging recess 4,4. At this time, the pair of engaging portions 7, 7 are fitted into the engaging recesses 4, 4 while the respective engaging wall surfaces 73, 73 of the pair of engaging portions 7, 7 are guided by the front inner wall surface (rear surface) 52b of the front wall portion 52 (see FIG. 6(b)), and the engaging portions 7, the engaging wall surfaces 73, and the front inner wall surface 52b of the front wall portion 52 are engaged with each other. In other words, the engaged portion 5 has the front wall portion 52 with which the connecting member 3 engages. Furthermore, for example, by inserting bolts (not shown) as fixing means into the bolt holes 6A1, 6A2 of the engaging portion 7 fitted into the engaging recess 4 and fastening the bolts into the bolt fastening holes 6A3, 6A4 formed in the bottom 51, the engaging portions 7, 7 of the connecting member 3 and the engaged portions 5, 5 of the receiving members 2, 2 are fixed, and adjacent deck slabs 10 and 10 are connected to each other via a horizontal joint 16 along the bridge axis direction X.

[0018] As described above, the front wall surface 52a of the front wall portion 52 of the engaged portion 5 of one receiving member 2 or the other receiving member 2 is provided with a spacer 4A (spacer 4AL, 4AR) corresponding to the dimensions of the gap that will become the horizontal joint 16. When the spacer 4A (spacer 4AL, 4AR) is provided, when the front and rear engaging wall surfaces 73, 73 of the connecting member 3 are guided by the front inner wall surfaces 52b, 52b of each engaged portion 5, 5 and the connecting member 3 is fitted into each engaging recess 4, 4 like a wedge, the spacer 4A functions as a reaction force device, thereby suppressing the attractive force acting in the direction of attracting the opposing deck slabs 10, 10 together via the horizontal joint 16, and preventing the deck slabs 10, 10 from getting too close to each other. In addition, at this time, an opposite force (reaction force) corresponding to the force acting in the direction of attracting each deck slab 10, 10 toward each other is applied from the spacer 4A to the front wall surfaces 52a, 52a of the engaged portions 5, 5 of each receiving member 2, 2, thereby increasing the adhesion force between the front and rear engaging wall surfaces 73, 73 of the connecting member 3 and the front inner wall surfaces 52b, 52b of each engaged portion 5, 5. Furthermore, by fastening bolts (not shown), the connecting member 3 is firmly fixed to the receiving member 2 provided on one deck slab 10 and the receiving member 2 provided on the other deck slab 10. In this way, the deck slabs 10, 10 adjacent to each other via the horizontal joints 16 along the bridge axis direction X are firmly connected by the deck slab joint device 1X.

[0019] As shown in Figures 1 to 5, the deck displacement suppression connection device 1 of embodiment 1 is configured to include a deck upper surface side connection device 1A and a deck lower surface side connection device 1B that are arranged symmetrically above and below and used. In the description of the deck slab displacement restraining connection device 1, up, down, left, right, primary side, and secondary side will be defined as directions shown in Figs. In Figure 1, the upper side in the direction perpendicular to the bridge axis Y corresponds to the primary side, the lower side in the direction perpendicular to the bridge axis Y corresponds to the secondary side, and the left and right correspond to the bridge axis direction X. Also, the top corresponds to the upper surface side of the deck slab, and the bottom corresponds to the lower surface side of the deck slab.

[0020] Figure 2 shows a state in which the lane formed by the previously installed primary deck slabs 10P, 10P... has already been put into use as a road, and the primary deck slab 10P and the secondary deck slab 10S have been connected by a deck slab displacement suppression connection device 1, and the vertical joints 15 have been filled with a filler 17 such as non-shrinkage mortar. In FIG. 2, F indicates the tires of vehicles passing through the lane formed by the primary decks 10P, 10P, . . . , and G indicates a barricade.

[0021] As shown in Figures 3 and 4, the deck slab upper surface connection device 1A is composed of a primary side female threaded portion 2A1 provided on the primary deck slab 10P, a secondary side female threaded portion 2A2 provided on the secondary deck slab 10S, a primary side receiving member 5A1, a secondary side receiving member 5A2, a spacer 4A, a connecting member 3A, a primary side fastening bolt 8A1, and a secondary side fastening bolt 8A2. That is, the deck top surface connection device 1A comprises a primary side female thread portion 2A1 provided on the primary deck 10P so as to open to the top surface 10A on the edge 11A side of the primary deck 10P, a secondary side female thread portion 2A2 provided on the secondary deck 10S so as to open to the top surface 10A on the edge 11S side of the secondary deck 10S, a primary side support member 5A1 installed on the top surface 10A on the edge 11S side of the primary deck 10P, a secondary side support member 5A2 installed on the top surface 10A on the edge 11S side of the secondary deck 10S, a spacer 4A provided on the primary side support member 5A1 or the secondary side support member 5A2 so as to be positioned sandwiched between the primary side support member 5A1 and the secondary side support member 5A2, and a connecting member 3A connecting the primary side support member 5A1 and the secondary side support member 5A2. Furthermore, it is provided with a primary side fastening bolt 8A1 which is passed through a bolt through hole 6A1 formed in the primary side insertion portion 7A1 of the connecting member 3A and a bolt through hole 6A3 formed in the primary side receiving member 5A1 and fastened to the primary side female thread portion 2A1, and a secondary side fastening bolt 8A2 which is passed through a bolt through hole 6A2 formed in the secondary side insertion portion 7A2 of the connecting member 3A and a bolt through hole 6A4 formed in the secondary side receiving member 5A2 and fastened to the secondary side female thread portion 2A2.

[0022] Also, as shown in Figures 3 and 5, the deck slab underside connection device 1B is configured to include a primary side female thread portion 2B1 provided on the primary deck slab 10P, a secondary side female thread portion 2B2 provided on the secondary deck slab 10S, a primary side receiving member 5B1, a secondary side receiving member 5B2, a spacer 4B, a connecting member 3B, a primary side fastening bolt 8B1, and a secondary side fastening bolt 8B2. That is, the deck underside connection device 1B comprises a primary side female threaded portion 2B1 provided on the primary deck 10P so as to open to the underside 10B on the edge 11A side of the primary deck 10P, a secondary side female threaded portion 2B2 provided on the secondary deck 10S so as to open to the underside 10B on the edge 11S side of the secondary deck 10S, a primary side support member 5B1 installed on the underside 10B on the edge 11A side of the primary deck 10P, a secondary side support member 5B2 installed on the underside 10B on the edge 11S side of the secondary deck 10S, a spacer 4B provided on the primary side support member 5B1 or the secondary side support member 5B2 so as to be positioned sandwiched between the primary side support member 5B1 and the secondary side support member 5B2, and a connecting member 3B connecting the primary side support member 5B1 and the secondary side support member 5B2. Furthermore, it is provided with a primary-side fastening bolt 8B1 which is passed through a bolt-through hole 6B1 formed in the primary-side insertion portion 7B1 of the connecting member 3B and a bolt-through hole 6B3 formed in the primary-side receiving member 5B1 and fastened to the primary-side female thread portion 2B1, and a secondary-side fastening bolt 8B2 which is passed through a bolt-through hole 6B2 formed in the secondary-side insertion portion 7B2 of the connecting member 3B and a bolt-through hole 6B4 formed in the secondary-side receiving member 5B2 and fastened to the secondary-side female thread portion 2B2.

[0023] In embodiment 1, a member composed of a primary side support member 5A1, a secondary side support member 5A2, and a connecting member 3A functions as a connecting member installed across the upper surface 10A on the edge 11A side of the primary deck slab 10P and the upper surface 10A on the edge 11S side of the secondary deck slab 10S, and a member composed of a primary side support member 5B1, a secondary side support member 5B2, and a connecting member 3B functions as a connecting member installed across the lower surface 10B on the edge 11A side of the primary deck slab 10P and the lower surface 10B on the edge 11S side of the secondary deck slab 10S. Furthermore, the edge 11A of the primary deck 10P is one of the edges located at both ends in the direction Y perpendicular to the bridge axis, and the edge 11S of the secondary deck 10S is one of the edges located at both ends in the direction Y perpendicular to the bridge axis, and the primary deck 10P and the secondary deck 10S are installed so that the edge 11A of the primary deck 10P and the edge 11S of the secondary deck 10S face each other via a vertical joint 15.

[0024] Furthermore, the primary side female thread portions 2A1, 2B1 and the secondary side female thread portions 2A2, 2B2 are configured by female thread inserts embedded in the concrete of the deck, for example.

[0025] As can be seen from Figures 4 to 6, in embodiment 1, the deck slab upper surface side connection device 1A and the deck slab lower surface side connection device 1B that constitute the deck slab displacement suppression connection device 1 have the same configuration as, for example, the above-mentioned deck slab joint device 1X except for the fixing portion 6. In the exploded perspective view of the deck slab upper surface side connecting device 1A shown in FIG. 4, the same parts as those of the deck slab joint device 1X shown in FIG. 6 are given the same reference numerals. That is, a component is manufactured from the receiving member 2 constituting the above-mentioned deck slab joint device 1X, with the fixed portion 6 removed and only the engaged portion 5 remaining, and this component with only the engaged portion 5 remaining is used as the primary side receiving member 5A1 and secondary side receiving member 5A2 of the deck slab upper surface side connecting device 1A, and the primary side receiving member 5B1 and secondary side receiving member 5B2 of the deck slab lower surface side connecting device 1B. Furthermore, the connecting member 3 constituting the above-described deck slab joint device 1X was used as it was as the connecting member 3A of the deck slab upper surface side connecting device 1A and the connecting member 3B of the deck slab lower surface side connecting device 1B. Furthermore, the spacer 4A constituting the above-described deck slab joint device 1X was used as it was as the spacer 4A of the deck slab upper surface side connecting device 1A and the spacer 4B of the deck slab lower surface side connecting device 1B. Furthermore, the bolt fastening holes 6A3, 6A4 of the deck slab joint device 1X formed by female threaded through holes were used as the bolt through holes 6A3, 6A4, 6B3, 6B4 of the deck slab displacement restraining connection device 1 as they were. The primary receiving member 5A1, the secondary receiving member 5A2, the primary receiving member 5B1, and the secondary receiving member 5B2 have the same configuration, and the connecting member 3A and the connecting member 3B also have the same configuration.

[0026] As shown in Figure 1, the deck 10P (10) is a rectangular plate-shaped deck made of reinforced concrete, and is equipped with a receiving member 2 of the above-mentioned deck joint device 1X on the edge surface 11 side in the direction along the bridge axis X, and is configured with a primary side female thread portion 2A1 that opens on the upper surface 10A on one edge 11A side in the direction perpendicular to the bridge axis Y, and a primary side female thread portion 2B1 that opens on the lower surface 10B on one edge 11A side in the direction perpendicular to the bridge axis Y. Similarly, the deck 10S (10) is a rectangular plate-shaped deck made of reinforced concrete, and is provided with a receiving member 2 of the above-mentioned deck joint device 1X on the edge surface 11 side in the direction along the bridge axis X, and is also provided with a primary side female thread portion 2A2 opening on the upper surface 10A on one edge 11S side in the direction perpendicular to the bridge axis Y, and a primary side female thread portion 2B2 opening on the lower surface 10B on one edge 11S side in the direction perpendicular to the bridge axis Y. In addition, a reinforced concrete deck refers to a deck that incorporates, for example, reinforcing bars, or PC steel wires, or steel material, or two or more of these reinforcing bars, steel material, and PC steel wires.

[0027] The deck slabs 10P and 10S are manufactured, for example, as follows. Reinforcing bars and the like to be embedded in the deck are placed in a deck forming formwork not shown in the figure, and multiple receiving members 2, 2..., as well as female thread inserts for forming female thread portions 2A1, 2B1 and female thread portions 2A2, 2B2 are placed in predetermined positions in the deck forming formwork so that the front wall surface 52a of the front wall portion 52 of the engaged portion 5 and the edge surface 11 of the deck slab 10 are positioned, for example, on the same plane, and the connecting portion insertion groove 42 and the engaging portion insertion opening 41 of the engaging recess 4 are exposed to the outside of the deck slabs 10P, 10S. Concrete is then poured into the deck forming formwork and allowed to harden, completing deck 10P and deck 10S. Furthermore, after the concrete of the deck slab has hardened, deck slab 10P and deck slab 10S may be manufactured by forming a hole that opens into the upper surface on the edge side and attaching a female thread insert into the hole to form a female thread portion, and by forming a hole that opens into the lower surface on the edge side and attaching a female thread insert into the hole to form a female thread portion.

[0028] The outline of the lane-specific deck slab replacement method according to the embodiment using the deck slab joint device 1X and the deck slab displacement suppression connection device 1 is as follows. First, in the first phase of construction, the deck slabs 10P, 10P installed adjacent to each other via horizontal joints 16 along the bridge axis direction X are connected to each other using the above-described deck slab joint device 1X. After adjacent deck slabs 10P, 10P are connected to each other by the deck slab joint device 1X, the joining of adjacent deck slabs 10P, 10P is completed by filling the horizontal joints 16 and the connecting members 3 and the engaged portions 5 with a filler 17 such as non-shrinkage mortar. Then, by sequentially joining the deck slabs 10P, 10P that are installed adjacent to each other along the bridge axis direction X via horizontal joints 16 within the planned first-phase construction area as described above, the deck replacement within the planned first-phase construction area will be completed, and the lanes formed on the deck slabs 10P, 10, ... replaced during the first-phase construction will be opened to traffic as a road. Next, in the second phase of construction, within the planned second phase of construction area, the secondary deck slabs 10S, 10S, ... are installed sequentially so that they are adjacent to each other along the bridge axis direction X via horizontal joints 16, and adjacent deck slabs 10S, 10S are connected using deck slab joint devices 1X, and the primary deck slabs 10P, 10P, ... that were installed earlier and put into use as a road are connected to adjacent secondary deck slabs 10S, 10S, ... along the direction perpendicular to the bridge axis Y via vertical joints 15 using deck slab displacement suppression connection devices 1. Then, filler 17 such as non-shrinkage mortar is filled into the horizontal joints 16 between adjacent secondary deck slabs 10S, 10S along the bridge axis direction X and above the connecting member 3 and the engaged portion 5, and filler 17 such as non-shrinkage mortar is filled into the vertical joints 15 between adjacent primary deck slabs 10P and secondary deck slabs 10S along the direction perpendicular to the bridge axis Y. Thereafter, after the filling material 17 has hardened, the deck displacement suppression connection device 1 is removed, thereby completing the replacement of the deck within the planned second phase construction scope.

[0029] Furthermore, in the second phase construction, it is preferable to install all secondary deck slabs 10S, 10S, ... within the planned second phase construction range and connect them using deck slab joint devices 1X and deck slab displacement suppression connection devices 1, and then fill all horizontal joints 16 and above the connecting members 3 and the engaged portions 5 with filler 17 such as non-shrinkage mortar, and then fill the vertical joints 15 over the entire length of the bridge within the planned second phase construction range with filler 17 such as non-shrinkage mortar. In addition, in the second phase of construction, each time a secondary deck slab 10S is installed and connected using a deck slab joint device 1X and a deck slab displacement suppression connection device 1, filler material 17 may be filled above the horizontal joints 16 and the connecting members 3 and the engaged portions 5, and into the vertical joints 15. Alternatively, each time multiple secondary deck slabs 10S, 10S, ... are installed and connected using the deck slab joint device 1X and the deck slab displacement suppression connection device 1, filler material 17 may be filled into the horizontal joints 16, above the connecting member 3 and the engaged portion 5, and into the vertical joints 15.

[0030] Next, a deck slab joining method using the deck slab displacement suppression connection device 1 in the lane-specific deck slab replacement construction method will be described in detail. The lane-specific deck replacement method using the deck displacement suppression connection device 1 is a construction method including the following first to fifth steps. That is, the method includes the following steps: a first step of fabricating primary deck slabs 10P having primary side female thread portions 2A1, 2B1, installing these primary deck slabs 10P in a line along the bridge axis direction X, and joining adjacent primary deck slabs 10P along the bridge axis direction X using a deck joint device 1X to complete the primary side lane; a second step of fabricating secondary deck slabs 10S having secondary side female thread portions 2A2, 2B2, and installing the secondary deck slab 10S in a line with the existing primary deck slab 10P via vertical joints 15 along the direction Y perpendicular to the bridge axis; a third step of connecting the secondary deck slab 10S and the existing primary deck slab 10P using a deck displacement suppression connection device 1; a fourth step of filling the vertical joints 15 between the secondary deck slab 10S and the existing primary deck slab 10P with a filler material 17 after the third step; and a fifth step of removing the deck displacement suppression connection device 1 after the filler material 17 has hardened after the fourth step.

[0031] The above-mentioned third step includes a deck slab upper surface side connection device configuring step and a deck slab lower surface side connection device configuring step. The deck top surface connection device construction step involves installing a primary side support member 5A1 on the top surface 10A on the edge 11A side of the primary deck slab 10P, which is arranged along the direction Y perpendicular to the bridge axis via a vertical joint 15, and installing a secondary side support member 5A2 on the top surface 10A on the edge 11S side of the secondary deck slab 10S, and installing a connecting member 3A connecting the primary side support member 5A1 and the secondary side support member 5A2. Then, the primary side fastening bolt 8A1 is passed through the bolt through holes 6A1 and 6A3 formed in the primary side insertion portion 7A1 of the connecting member 3A and the primary side receiving member 5A1 and fastened to the primary side female thread portion 2A1, and the secondary side fastening bolt 8A2 is passed through the bolt through holes 6A2 and 6A4 formed in the secondary side insertion portion 7A2 of the connecting member 3A and the secondary side receiving member 5A2 and fastened to the secondary side female thread portion 2A2, thereby forming the deck slab upper surface connection device 1A. In addition, the deck underside connection device configuration step involves installing a primary side support member 5B1 on the underside 10B on the edge 11A side of the primary deck 10P, which is arranged along the direction Y perpendicular to the bridge axis via a vertical joint 15, and installing a secondary side support member 5B2 on the underside 10B on the edge 11S side of the secondary deck 10S, and installing a connecting member 3B that connects the primary side support member 5B1 and the secondary side support member 5B2. Then, the primary side fastening bolt 8B1 is passed through the bolt through holes 6B1, 6B3 formed in the primary side insertion portion 7B1 of the connecting member 3B and the primary side receiving member 5B1 and fastened to the primary side female thread portion 2B1, and the secondary side fastening bolt 8B2 is passed through the bolt through holes 6B2, 6B4 formed in the secondary side insertion portion 7B2 of the connecting member 3B and the secondary side receiving member 5B2 and fastened to the secondary side female thread portion 2B2, thereby forming the deck slab underside connection device 1B.

[0032] According to the displacement suppression connection device 1 for deck slabs of embodiment 1, the bolts 8A1, 8A2, 8B1, 8B2 are screwed into the female threaded portions 2A1, 2A2, 2B1, 2B2 and fixed to the deck slabs 10P, 10S, making the bolts less likely to loosen and allowing the receiving members 5A1, 5A2, 5B1, 5B2 and the connecting members 3A, 3B to be more firmly fixed to the deck slabs 10P, 10S. In other words, the primary side fastening bolt 8A1 passes through the bolt through hole 6A1 and the bolt through hole 6A3 and is fastened to the primary side female thread portion 2A1, and the secondary side fastening bolt 8A2 passes through the bolt through hole 6A2 and the bolt through hole 6A3 and is fastened to the secondary side female thread portion 2A2, making the primary side fastening bolt 8A1 and the secondary side fastening bolt 8A2 less likely to loosen, and the fastening force of the primary side fastening bolt 8A1 and the secondary side fastening bolt 8A2 can more firmly fix the primary side support member 5A1, the secondary side support member 5A2, and the connecting member 3A to the deck slabs 10P, 10S. Therefore, the primary deck 10P and the secondary deck 10S can be connected more firmly, and the effect of suppressing relative displacement between the primary deck 10P and the secondary deck 10S can be further improved, making it possible to suppress cracks in the filler material 17 filled in the vertical joints 15 and the occurrence of openings in the vertical joints 15.

[0033] Furthermore, the deck displacement suppression connection device 1 of embodiment 1 is configured with a pair of receiving members and connecting members, which are similar in configuration to the pair of engaged portions 5 and connecting members 3 of the above-mentioned deck joint device 1X, and therefore can achieve a connection structure as strong as the connection structure using the deck joint device 1X. In other words, by using the deck slab upper surface connection device 1A, the front inner wall surfaces 52b, 52b of the primary side support member 5A1 and the secondary side support member 5A2 and the engaging wall surfaces 73, 73 of the connecting member 3A are fitted together like wedges, and the primary side fastening bolts 8A1 and secondary side fastening bolts 8A2 fasten and fix the primary side support member 5A1 and the secondary side support member 5A and the connecting member 3A to the primary deck slab 10P and the secondary deck slab 10S, thereby making it possible to more firmly connect the primary deck slab 10P and the secondary deck slab 10S. In other words, since the connecting member 3A and the primary side support member 5A1 and the secondary side support member 5A2 are configured to have a wedge function, it is possible to realize a connection structure that is the same as the strong connection structure achieved by the deck slab joint device 1X, which is called a cotter-type joint and is characterized by the wedge function described above, thereby making it possible to more firmly connect the primary deck slab 10P and the secondary deck slab 10S. In particular, since the primary side receiving member 5A1 or the secondary side receiving member 5A2 is configured with a spacer 4A on the front wall surface 52a, when the connecting member 3A is fitted into each engaging recess 4, 4 while the engaging wall surfaces 73, 73 of the connecting member 3A are guided by the front inner wall surfaces 52b, 52b of the primary side receiving member 5A1 and the secondary side receiving member 5A2, the spacer 4A functions as a reaction force device, thereby suppressing the attractive force acting in the direction of attracting the opposing deck slabs 10P, 10S together via the vertical joint 15, and preventing the deck slabs 10, 10 from getting too close to each other. Furthermore, at this time, an opposite force (reaction force) corresponding to the force acting in the direction of attracting each deck slab 10P, 10S toward each other is applied from the spacer 4A to the front wall surfaces 52a, 52a of the primary side support member 5A1 and the secondary side support member 5A2, thereby increasing the adhesion force between the engaging wall surfaces 73, 73 of the connecting member 3A and the front inner wall surfaces 52b, 52b of the primary side support member 5A1 and the secondary side support member 5A2. The wedge function, spacer function, and bolt fastening structure described above allow the connecting member 3A and the primary and secondary bearing members 5A1 and 5A2 to be more firmly fixed to the upper surfaces 10A, 10A of the deck slabs 10P, 10S. In addition, by using the deck slab underside connection device 1B, the connecting member 3B and the primary side support member 5B1 and secondary side support member 5B2 are similarly more firmly fixed to the underside 10B, 10B side of the deck slabs 10P, 10S. That is, according to the displacement suppression connection device 1 for deck slabs of embodiment 1, since it is configured with a deck slab upper surface side connection device 1A and a deck slab lower surface side connection device 1B, it is possible to more firmly connect the primary deck slab 10P and the secondary deck slab 10S on both the upper surface 10A side and the lower surface 10B side. Furthermore, according to the deck displacement suppression connection device 1 of embodiment 1, it is possible to produce the above-mentioned deck slab joint device 1X using a molding device that is slightly modified from the molding device used to produce the same, thereby reducing the design and manufacturing costs of the molding device.

[0034] As described above, in embodiment 1, by using a deck displacement suppression connection device 1 composed of a deck top surface side connection device 1A and a deck bottom surface side connection device 1B, the primary deck 10P and the secondary deck 10S can be connected more firmly, and the relative displacement suppression effect between the primary deck 10P and the secondary deck 10S can be further improved, making it possible to suppress cracks in the filler material 17 filled in the vertical joints 15 and the occurrence of openings in the vertical joints 15. In addition, the deck displacement suppression connection device 1 can also accommodate positional deviations between the primary deck 10P and the secondary deck 10S (the step Z between the top surface of the primary deck 10P and the top surface of the secondary deck 10S, deviation in the bridge axis direction X, and deviation in the direction perpendicular to the bridge axis Y). Furthermore, in the displacement restraint connection device for deck slabs described in Patent Document 1, the upper and lower connecting flat plates must be installed on the upper and lower surfaces of the deck slab, and bolts must be passed through through holes formed in the upper and lower connecting flat plates and the deck slab, after which nuts must be fastened to the upper and lower ends of the bolts.As this requires work to be done on both the top and bottom sides of the deck slab, the installation work for the displacement restraint connection device for deck slabs is complicated, posing issues in terms of workability. On the other hand, according to embodiment 1, the work of connecting the upper surface 10A of the deck slabs 10P, 10S using the deck slab upper surface connection device 1A can be performed on the upper surface 10A of the deck slabs 10P, 10S, and the work of connecting the lower surface 10B of the deck slabs 10P, 10S using the deck slab lower surface connection device 1B can be performed on the lower surface 10B of the deck slabs 10P, 10S, making construction easier and making it possible to provide a deck slab displacement suppression connection device 1 with excellent construction properties. Furthermore, the installation work of the deck slab underside connection device 1B can be performed on the underside of the deck, and does not impede road traffic, so the work can be done at any time of the day. In other words, by using the deck displacement suppression connection device 1 according to embodiment 1, the construction of the lane-specific deck replacement method has become easier, and it has become possible to realize a lane-specific deck replacement method with high construction quality.

[0035] In the above, an example is shown in which the bolt fastening holes 6A3, 6A4 of the deck slab joint device 1X formed by female threaded through holes are used as the bolt through holes 6A3, 6A4, 6B3, 6B4 of the deck slab displacement restraint connection device 1, but the bolt through holes 6A3, 6A4, 6B3, 6B4 provided in the receiving members 5A1, 5A2, 5B1, 5B2 of the deck slab displacement restraint connection device 1 may also be through holes without female threads.

[0036] Embodiment 2 In the displacement-restraining connection device 1 for a deck slab according to embodiment 1, a configuration has been exemplified in which bolts 8A1, 8A2, 8B1, 8B2 are fastened to the female threaded portions 2A1, 2A2, 2B1, 2B2, but the displacement-restraining connection device 1 for a deck slab may also be configured in such a way that one end of the bolt is screwed into the female threaded portions 2A1, 2A2, 2B1, 2B2, and a nut is fastened to the other end of the bolt that has passed through a bolt-through hole formed in the receiving members 5A1, 5A2 and the connecting member 3A, or the receiving members 5B1, 5B2 and the connecting member 3B. As shown in Figure 7, the deck displacement suppression connection device 1 of embodiment 2 is configured to include a deck upper surface side connection device 1A and a deck lower surface side connection device 1B, similar to the deck displacement suppression connection device 1 of embodiment 1. In FIG. 7, the same parts as those shown in FIG. 3 of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In addition, an exploded oblique view of the deck slab upper surface connection device 1A of the deck slab displacement suppression connection device 1 of embodiment 2 is not shown, but this exploded oblique view corresponds to an exploded oblique view of the configuration excluding the primary side receiving member fixing nut 82A1 and the secondary side receiving member fixing nut 82A2 shown in Figure 9, which is an exploded oblique view of the deck slab upper surface connection device 1A of the deck slab displacement suppression connection device 1 of embodiment 3 described later.

[0037] That is, as shown in Figure 7, the deck slab upper surface connection device 1A of the deck slab displacement suppression connection device 1 of embodiment 2 comprises a primary side female thread portion 2A1 provided on the primary deck slab 10P so as to open to the upper surface 10A on the edge 11A side of the primary deck slab 10P, a secondary side female thread portion 2A2 provided on the secondary deck slab 10S so as to open to the upper surface 10A on the edge 11S side of the secondary deck slab 10S, a primary side support member 5A1 installed on the upper surface 10A on the edge 11A side of the primary deck slab 10P, a secondary side support member 5A2 installed on the upper surface 10A on the edge 11S side of the secondary deck slab 10S, a spacer 4A provided on the primary side support member 5A1 or the secondary side support member 5A2 so as to be positioned sandwiched between the primary side support member 5A1 and the secondary side support member 5A2, and a connecting member 3A connecting the primary side support member 5A1 and the secondary side support member 5A2. Furthermore, it is equipped with a primary bolt 80A1 having one end threaded into the primary female threaded portion 2A1 and the other end passed through bolt through holes 6A3, 6A1 formed in the primary receiving member 5A1 and the primary insertion portion 7A1 of the connecting member 3A, a primary nut 81A1 fastened to the other end of the primary bolt that has passed through the bolt through holes 6A3, 6A1, a secondary bolt 80A2 having one end threaded into the secondary female threaded portion 2A2 and the other end passed through bolt through holes 6A4, 6A2 formed in the secondary receiving member 5A2 and the secondary insertion portion 7A2 of the connecting member 3A, and a secondary nut 81A2 fastened to the other end of the secondary bolt that has passed through the bolt through holes 6A4, 6A2. Also, as shown in Figure 7, the deck underside connection device 1B of the deck displacement suppression connection device 1 of embodiment 2, like embodiment 1 shown in Figure 3, is equipped with a primary side female thread portion 2B1 provided on the primary deck 10P so as to open to the underside 10B on the edge 11A side of the primary deck 10P, a secondary side female thread portion 2B2 provided on the secondary deck 10S so as to open to the underside 10B on the edge 11S side of the secondary deck 10S, a primary side support member 5B1 installed on the underside 10B on the edge 11A side of the primary deck 10P, a secondary side support member 5B2 installed on the underside 10B on the edge 11S side of the secondary deck 10S, a spacer 4B provided on the primary side support member 5B1 or the secondary side support member 5B2 so as to be positioned between the primary side support member 5B1 and the secondary side support member 5B2, and a connecting member 3B connecting the primary side support member 5B1 and the secondary side support member 5B2. Furthermore, it is equipped with a primary bolt 80B1 having one end threaded into the primary female threaded portion 2B1 and the other end passed through bolt through holes 6B3, 6B1 formed in the primary receiving member 5B1 and the primary insertion portion 7B1 of the connecting member 3A, a primary nut 81B1 fastened to the other end of the primary bolt 80B1 that has passed through the bolt through holes 6B3, 6B1, a secondary bolt 80B2 having one end threaded into the secondary female threaded portion 2B2 and the other end passed through bolt through holes 6B4, 6B2 formed in the secondary receiving member 5B2 and the secondary insertion portion 7B2 of the connecting member 3B, and a secondary nut 81B2 fastened to the other end of the secondary bolt 80B2 that has passed through the bolt through holes 6B4, 6B2. The primary side bolts 80A1, 80B1 and the secondary side bolts 80A2, 80B2 may be, for example, fully threaded bolts (threaded bolts). Furthermore, in the deck slab displacement-restraining connecting device according to the second embodiment, the bolt-through holes 6A3, 6A4, 6B3, 6B4 are preferably through-holes without female threads, but may also be female-threaded through-holes.

[0038] In addition, the lane-specific deck replacement method using the deck displacement suppression connection device 1 according to the second embodiment includes the following steps: a first step of manufacturing primary decks 10P equipped with primary side female thread portions 2A1 and 2B1, installing these primary decks 10P in a line along the bridge axis direction X, and joining adjacent primary decks 10P along the bridge axis direction X using a deck joint device 1X to complete the primary side lane; and a second step of manufacturing secondary decks 10S equipped with secondary side female thread portions 2A2 and 2B2, and joining adjacent primary decks 10P along the bridge axis perpendicular direction Y. The method includes a second step of installing the secondary deck slab 10S so that it is aligned with the existing primary deck slab 10P via a vertical joint 15; a third step of connecting the secondary deck slab 10S and the existing primary deck slab 10P using a deck slab displacement suppression connection device 1; a fourth step after the third step of filling the vertical joint 15 between the secondary deck slab 10S and the existing primary deck slab 10P with a filler material 17; and a fifth step after the fourth step of removing the deck slab displacement suppression connection device 1 after the filler material 17 has hardened. In this case, in the third step, the connecting step on the upper surface of the deck slab, one end of the primary side bolt is screwed into the primary side female threaded portion 2A1 opening on the upper surface 10A on the edge 11A side of the primary deck slab 10P, and one end of the secondary side bolt is screwed into the secondary side female threaded portion 2A2 opening on the upper surface 10A on the edge 11S side of the secondary deck slab 10S.Then, the other end of the primary side bolt is passed through the bolt through hole 6A3 of the primary side support member 5A1 to install the primary side support member 5A1 on the upper surface 10A on the edge 11A side of the primary deck slab 10P, and the other end of the secondary side bolt is passed through the bolt through hole 6A4 of the secondary side support member 5A2 to install the secondary side support member 5A2 on the upper surface 10A on the edge 11S side of the secondary deck slab 10S. Then, the other end of the primary bolt is passed through the bolt through hole 6A1 formed in the primary insertion portion 7A1 of the connecting member 3A, and the other end of the secondary bolt is passed through the bolt through hole 6A2 formed in the secondary insertion portion 7A2 of the connecting member 3A, and then a primary nut is fastened to the other end of the primary bolt that has passed through the bolt through holes 6A3 and 6A1, and a secondary nut is fastened to the other end of the secondary bolt that has passed through the bolt through holes 6A4 and 6A2, thereby forming the deck slab upper surface connection device 1A. Furthermore, in the third step, the connecting step on the underside of the deck slab, one end of the primary side bolt is screwed into the primary side female threaded portion 2B1 opening on the underside 10B on the edge 11A side of the primary deck slab 10P, and one end of the secondary side bolt is screwed into the secondary side female threaded portion 2B2 opening on the underside 10B on the edge 11S side of the secondary deck slab 10S.Then, the other end of the primary side bolt is passed through the bolt through hole 6B3 of the primary side support member 5B1 to install the primary side support member 5B1 on the underside 10B on the edge 11A side of the primary deck slab 10P, and the other end of the secondary side bolt is passed through the bolt through hole 6B4 of the secondary side support member 5B2 to install the secondary side support member 5B2 on the underside 10B on the edge 11S side of the secondary deck slab 10S. Then, the other end of the primary bolt is passed through the bolt through hole 6B1 formed in the primary insertion portion 7B1 of the connecting member 3B, and the other end of the secondary bolt is passed through the bolt through hole 6B2 formed in the secondary insertion portion 7B2 of the connecting member 3B, and then a primary nut is fastened to the other end of the primary bolt that has passed through the bolt through holes 6B3 and 6B1, and a secondary nut is fastened to the other end of the secondary bolt that has passed through the bolt through holes 6B4 and 6B2, thereby forming the deck slab underside connection device 1B.

[0039] According to the deck slab displacement suppression connection device and lane-specific deck slab replacement construction method of the second embodiment, the same effects as those of the first embodiment can be obtained. Furthermore, according to the displacement suppression connection device for deck slabs of embodiment 2, the bolts 80A1, 80A2, 80B1, 80B2 are configured to be screwed into the female threaded portions 2A1, 2A2, 2B1, 2B2 and fixed to the deck slabs 10P, 10S, making the bolts less likely to loosen, and the fastening force of the nuts 81A1, 81A2, 81B1, 81B2 allows the receiving members 5A1, 5A2, 5B1, 5B2 and the connecting members 3A, 3B to be more firmly fixed to the deck slabs 10P, 10S.

[0040] Embodiment 3 The displacement-restraining connection device 1 for a deck slab according to the third embodiment has the same configuration as the displacement-restraining connection device 1 for a deck slab according to the second embodiment, and further has a receiving member fixing nut for fixing the receiving member to the bolt. In other words, in order to improve the ease of installation of the deck displacement suppression connection device 1, the device is configured to have separate fixing nuts for fixing the receiving member to the bolt and for fixing the connecting member to the bolt. The deck slab displacement-restraining connection device 1 according to the third embodiment is configured to include a deck slab upper surface side connection device 1A and a deck slab lower surface side connection device 1B, similar to the deck slab displacement-restraining connection device 1 according to the second embodiment. That is, as shown in Figures 8 and 9, the deck slab upper surface connection device 1A of the deck slab displacement suppression connection device 1 of embodiment 3 is provided with a primary side support member fixing nut 82A1 for fixing the primary side support member 5A1 to the primary side bolt 80A1, and a secondary side support member fixing nut 82A2 for fixing the primary side support member 5A2 to the primary side bolt 80A1. 8 and 9, the same parts as those shown in FIG. 7 of the second embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Also, although not shown, the deck underside connection device of the deck displacement suppression connection device 1 of embodiment 3 is similarly configured to include a primary side support member fixing nut for fixing the primary side support member to the primary side bolt, and a primary side support member fixing nut for fixing the secondary side support member to the secondary side bolt.

[0041] As shown in FIGS. 8 and 9, the deck slab upper surface side connection device 1A of the deck slab displacement suppression connection device 1 according to the third embodiment is similar to the deck slab upper surface side connection device 1A described in the second embodiment, and includes a primary side female threaded portion 2A1, a secondary side female threaded portion 2A2, a primary side receiving member 5A1, a secondary side receiving member 5A2, a connecting member 3A, a primary side bolt 80A1, and a secondary side bolt 80A2, and also includes a primary side receiving member fixing nut fastened to the other end of the primary side bolt 80A1 passed through a bolt through hole 6A3 formed in the primary side receiving member 5A1 to fix the primary side receiving member 5A1 to the primary side bolt 80A1 and the upper surface 10A of the primary deck slab 10P. The connecting member 3A is configured with a bolt 82A1, a secondary receiving member fixing nut 82A2 fastened to the other end of the secondary bolt 80A2 passed through a bolt through hole 6A4 formed in the secondary receiving member 5A2 to fix the secondary receiving member 5A2 to the secondary bolt 80A2 and the upper surface 10A of the secondary deck slab 10S, a primary nut 81A1 fastened to the other end of the primary bolt 80A1 passed through a bolt through hole 6A1 formed in the primary insertion portion 7A1 of the connecting member 3A, and a secondary nut 81A2 fastened to the other end of the secondary bolt 80A2 passed through a bolt through hole 6A2 formed in the secondary insertion portion 7A2 of the connecting member 3A. Although not shown, the deck slab underside connection device of the deck slab displacement suppression connection device 1 according to the third embodiment is similar to the deck slab underside connection device 1B described in FIG. 7 of the second embodiment, and includes a primary side female threaded portion 2B1, a secondary side female threaded portion 2B2, a primary side receiving member 5B1, a secondary side receiving member 5B2, a connecting member 3B, a primary side bolt 80B1, and a secondary side bolt 80B2. The primary side receiving member fixing member fastens the primary side receiving member 5B1 to the other end of the primary side bolt 80B1 passed through a bolt through hole 6B3 formed in the primary side receiving member 5B1, and fixes the primary side receiving member 5B1 to the primary side bolt 80B1 and the underside 10B of the primary deck slab 10P. The connecting member 3B is provided with a fixing nut, a secondary receiving member fixing nut fastened to the other end of the secondary bolt 80B2 passed through a bolt through hole 6A4 formed in the secondary receiving member 5B2 to fix the secondary receiving member 5B2 to the secondary bolt 80B2 and the underside 10B of the secondary deck slab 10S, a primary side nut 81B1 fastened to the other end of the primary side bolt 80B1 passed through a bolt through hole 6B1 formed in the primary side insertion portion 7B1 of the connecting member 3B, and a secondary side nut 81B2 fastened to the other end of the secondary side bolt 80B2 passed through a bolt through hole 6B2 formed in the secondary side insertion portion 7B2 of the connecting member 3B. That is, similarly to the first and second embodiments, the deck slab underside connection device 1B has a configuration that is vertically symmetrical to the above-mentioned deck slab upper side connection device 1A.

[0042] Moreover, the lane-specific deck slab replacement construction method using the deck slab displacement suppressing connection device 1 according to the third embodiment is a construction method including the first to fifth steps, similar to the first and second embodiments. In the third embodiment, the third step includes a deck slab upper surface side connecting step and a deck slab lower surface side connecting step, similar to the first and second embodiments. As shown in FIGS. 8 and 9, in the deck top surface connecting step, one end of the primary bolt 80A1 is screwed into the primary female threaded portion 2A1 that opens on the top surface 10A on the edge 11A side of the primary deck 10P, and one end of the secondary bolt 80A2 is screwed into the secondary female threaded portion 2A2 that opens on the top surface 10A on the edge 11S side of the secondary deck 10S. Then, the other end of the primary bolt 80A1 is passed through the bolt through hole 6A3 of the primary side receiving member 5A1, and a primary side receiving member fixing nut 82A1 is fastened to the other end of the primary side bolt 80A1, thereby fixing the primary side receiving member 5A1 to the top surface 10A on the edge 11A side of the primary deck 10P, and the other end of the secondary bolt 80A2 is passed through the bolt through hole 6A4 of the secondary side receiving member 5A2. After that, the secondary side receiving member 5A2 is fixed to the upper surface 10A on the edge 11S side of the secondary deck 10S by fastening a secondary side receiving member fixing nut 82A2 to the other end side of the secondary side bolt 80A2, the other end side of the primary side bolt 80A1 is passed through the bolt through hole 6A1 formed in the primary side insertion portion 7A1 of the connecting member 3A, and the other end side of the secondary side bolt 80A2 is passed through the bolt through hole 6A2 formed in the secondary side insertion portion 7A2 of the connecting member 3A, and then a primary side nut 81A is fastened to the other end side of the primary side bolt 80A1 that has passed through the bolt through hole 6A1, and a secondary side nut 81A2 is fastened to the other end side of the secondary side bolt 80A2 that has passed through the bolt through hole 6A2, thereby forming the deck slab upper surface connection device 1A. Although not shown, the deck underside connection step involves screwing one end of the primary bolt into a primary female threaded portion that opens onto the underside of the edge of the primary deck, and screwing one end of the secondary bolt into a secondary female threaded portion that opens onto the underside of the edge of the secondary deck, and then passing the other end of the primary bolt through the bolt through hole of the primary support member and fastening a primary support member fixing nut to the other end of the primary bolt, thereby fixing the primary support member to the underside of the edge of the primary deck, and passing the other end of the secondary bolt through the bolt through hole of the secondary support member and fastening the secondary support member to the other end of the primary bolt. The secondary support member is fixed to the underside of the edge of the secondary deck slab by fastening a secondary support member fixing nut to the other end of the secondary bolt, and then the other end of the primary bolt is passed through a bolt through hole formed in the primary insertion portion of the connecting member, and the other end of the secondary bolt is passed through a bolt through hole formed in the secondary insertion portion of the connecting member, and then a primary nut is fastened to the other end of the primary bolt that has passed through the bolt through hole, and a secondary nut is fastened to the other end of the secondary bolt that has passed through the bolt through hole, thereby forming a deck slab upper surface connection device. That is, the deck slab underside connection step constitutes a deck slab underside connection device on the underside 10B side of the primary deck slab 10P and the secondary deck slab 10S, similar to the deck slab upper side connection step.

[0043] According to the deck displacement suppression connection device 1 and lane-specific deck replacement construction method of embodiment 3, the same effects as embodiment 2 can be obtained, and in addition, since the receiving member can be fixed to the bolt and deck slab using the receiving member fixing nut, it is no longer necessary to support the receiving member when installing the connecting member, and the workability of installing the deck displacement suppression connection device 1 is significantly improved. In particular, the work of configuring the deck slab underside connection device becomes easier. Furthermore, since the support member and the connecting member are fixed to the bolt and the deck slab using separate nuts, the support member and the connecting member can be fixed to the deck slab more firmly.

[0044] Embodiment 4 Instead of the primary-side bearing members, secondary-side bearing members, and connecting members shown in the first to third embodiments, H-shaped steel may be used as structural steel. As shown in FIG. 10, the deck slab displacement-restraining connection device 1 according to the fourth embodiment is configured to include a deck slab upper surface side connection device 1A and a deck slab lower surface side connection device 1B, similar to the first to third embodiments. In FIG. 10, the same parts as those shown in FIG. 7 of the second embodiment are denoted by the same reference numerals, and the description thereof will be omitted. As shown in FIG. 10, the deck slab upper surface side connection device 1A of the deck slab displacement suppression connection device 1 according to the fourth embodiment includes a primary-side female threaded portion 2A1 provided on the primary deck slab 10P so as to open on the upper surface 10A on the edge 11A side of the primary deck slab 10P, a secondary-side female threaded portion 2A2 provided on the secondary deck slab 10S so as to open on the upper surface 10A on the edge 11S side of the secondary deck slab 10S, an H-shaped steel 9 installed across the upper surface 10A on the edge 11A side of the primary deck slab 10P and the upper surface 10A on the edge 11S side of the secondary deck slab 10S, and a steel member 9 having one end threaded into the primary-side female threaded portion 2A1. the primary side bolt 80A1 having one end threaded into the secondary side female threaded portion 2A2 and the other end passed through a bolt-through hole 91 formed in one flange 90a of the H-shaped steel 9; a primary side nut 81A1 fastened to the other end of the primary side bolt 80A1 that has passed through the bolt-through hole 91; a secondary side bolt 80A2 having one end threaded into the secondary side female threaded portion 2A2 and the other end passed through a bolt-through hole 91 formed in one flange 90a of the H-shaped steel 9; and a secondary side nut 81A2 fastened to the other end of the secondary side bolt 80A2 that has passed through the bolt-through hole 91. The deck underside connection device 1B includes a primary-side female screw portion 2A2 provided on the primary deck 10P so as to open onto the underside 10B on the edge 11A side of the primary deck 10P, a secondary-side female screw portion 2B2 provided on the secondary deck 10S so as to open onto the underside 10B on the edge 11S side of the secondary deck 10S, an H-shaped steel 9 installed across the underside 10B on the edge 11A side of the primary deck 10P and the underside 10B on the edge 11S side of the secondary deck 10S, and a bolt 911 having one end threaded into the primary-side female screw portion 2A2 and the other end threaded into one of the H-shaped steel 911. the primary side bolt 80B1 passed through a bolt-through hole 91 formed in one flange 90a of the H-shaped steel 9; a primary side nut 81B1 fastened to the other end of the primary side bolt 80B1 that has passed through the bolt-through hole 91; a secondary side bolt 80B2 having one end threaded into the secondary side female threaded portion 2B2 and the other end passed through a bolt-through hole 91 formed in one flange 90a of the H-shaped steel 9; and a secondary side nut 81B2 fastened to the other end of the secondary side bolt 80B2 that has passed through the bolt-through hole 91.

[0045] That is, in the deck slab upper surface connection device 1A of the deck slab displacement suppression connection device 1 of embodiment 3, as shown in Figure 10(a), the H-shaped steel 9 is arranged so that the lateral extension direction of the web 90c of the H-shaped steel 9 extends in a direction perpendicular to the vertical joint 15 (direction Y perpendicular to the bridge axis), and as shown in Figures 10(b) and (c), the outer surface 90f of one flange 90a of the H-shaped steel 9 extends across the upper surface 10A of the adjacent primary deck slab 10P and the upper surface 10A of the secondary deck slab 10S via the vertical joint 15. Similarly, in the deck underside connection device 1B, the H-shaped steel 9 is arranged so that the horizontal extension direction of the web 90c of the H-shaped steel 9 extends in a direction perpendicular to the vertical joint 15 (direction Y perpendicular to the bridge axis), and so that the outer surface 90f of one flange 90a of the H-shaped steel 9 extends across the underside 10B of the adjacent primary deck slab 10P and the underside 10B of the secondary deck slab 10S via the vertical joint 15.

[0046] That is, left and right primary side female threaded portions 2A1, 2A1 are provided on the upper surface 10A of the primary deck slab 10 on both sides of the web 90c of the H-shaped steel 9, and one end of the primary side bolts 80A1, 80A1 is screwed into the left and right primary side female threaded portions 2A1, 2A1, respectively, as shown in Figures 10(a) and (b). Corresponding to these primary side bolts 80A1, 80A1, bolt through holes 91, 91 are provided on one flange 90a of the H-shaped steel 9 at positions on both sides of the web 90c, and the other ends of the primary side bolts 80A1, 80A1 are passed through the bolt through holes 91, 91, and secondary side nuts 81B1, 81B1 are fastened to the other ends of the primary side bolts 80A1, 80A1 that have passed through the bolt through holes 91, 91, respectively. Similarly, bolt-through holes 91, 91 are provided on one flange 90a of the H-shaped steel 9 at positions on both sides of the web 90c to correspond to the secondary bolts 80A2, 80A2, and the other ends of the secondary bolts 80A2, 80A2 are passed through the bolt-through holes 91, 91, and secondary nuts 81A2, 81A2 are fastened to the other ends of the secondary bolts 80A2, 80A2 that have passed through the bolt-through holes 91, 91, respectively. That is, one flange of the H-shaped steel 9 is positioned so as to straddle the upper surface 10A of the primary deck slab 10 and the upper surface 10A of the secondary deck slab, and one flange of the H-shaped steel 9 is fixed to the primary deck slab at two points, and one flange of the H-shaped steel 9 is fixed to the secondary deck slab at two points. Similarly, one flange of the H-shaped steel 9 is positioned to straddle the underside 10B of the primary deck slab 10 and the underside 10B of the secondary deck slab, and one flange of the H-shaped steel 9 is fixed to the primary deck slab at two points, and one flange of the H-shaped steel 9 is fixed to the secondary deck slab at two points. In other words, one flange of the H-shaped steel 9 is fixed to the deck slab at four points, so that the H-shaped steel 9 can be fixed to the deck slab more firmly.

[0047] The lane-specific deck slab replacement method using the deck slab displacement suppressing connection device 1 according to the fourth embodiment is a construction method including the first to fifth steps, similar to the first to third embodiments. In embodiment 4, in the third step, the connecting step on the upper surface of the deck slab, one end of the primary bolt 80A1 is screwed into the primary female threaded portion 2A1 opening onto the upper surface 10A on the edge 11A side of the primary deck slab 10P, and one end of the secondary bolt 80A2 is screwed into the secondary female threaded portion 2A2 opening onto the upper surface 10A on the edge 11S side of the secondary deck slab 10S. Then, the other end of the primary bolt 80A1 is passed through the bolt hole 91 of one flange 90a of the H-shaped steel 9 on the upper surface 10A side of the edge 11A of the primary deck 10P, and the other end of the secondary bolt 80A2 is passed through the bolt hole 91 of one flange 9a of the H-shaped steel 9 on the upper surface 10A side of the edge 11S of the secondary deck 10S, thereby installing one flange 9a of the H-shaped steel 9 across the upper surface 10A on the edge 11A side of the primary deck 10P and the upper surface 10A on the edge 11S side of the secondary deck 10S. Then, a primary nut 81A is fastened to the other end of the primary bolt 80A1 that has passed through the bolt-through hole 91, and a secondary nut 81A2 is fastened to the other end of the secondary bolt 80A2 that has passed through the bolt-through hole 91, thereby forming the deck slab upper surface connection device 1A. In addition, in the deck underside connection step, one end of the primary side bolt 80B1 is screwed into the primary side female threaded portion 2B1 opening onto the underside 10B on the edge 11S side of the primary deck 10P, and one end of the secondary side bolt 80B2 is screwed into the secondary side female threaded portion 2B2 opening onto the underside 10B on the edge 11S side of the secondary deck 10S. Then, the other end of the primary bolt 2B1 is passed through the bolt hole 91 of one flange 9a of the H-shaped steel 9 on the underside 10B of the edge 11S side of the primary deck 10P, and the other end of the secondary bolt 80B2 is passed through the bolt hole 91 of one flange 9a of the H-shaped steel 9 on the underside 10B of the edge 11S side of the secondary deck 10S, thereby installing one flange 9a of the H-shaped steel 9 across the underside 10B of the edge 11A side of the primary deck 10P and the underside 10B of the edge 11S side of the secondary deck 10S. Then, a primary nut 81B1 is fastened to the other end of the primary bolt 80B1 that has passed through the bolt-through hole 91, and a secondary nut 81B2 is fastened to the other end of the secondary bolt 80B2 that has passed through the bolt-through hole 91, thereby forming the deck slab underside connection device 1B.

[0048] According to the deck displacement suppression connection device 1 and lane-specific deck replacement construction method of embodiment 4, the bolts are configured to be screwed into the female thread portions and fixed to the deck, making the bolts less likely to loosen and allowing the fastening force of the nuts to more firmly fix the H-shaped steel 9 to the deck slabs 10P, 10S, thereby achieving the same effects as embodiments 1 to 3. Furthermore, as shown in Figure 10(a), the configuration is such that one flange 90a of the H-shaped steel 9 is fixed at four points and the weight of the H-shaped steel 9 is utilized, thereby making it possible to more firmly fix the H-shaped steel 9 to the deck slab and more firmly connect the primary deck slab 10P and the secondary deck slab 10S. In other words, as in embodiments 1 to 3, the effect of suppressing relative displacement between the primary deck slab 10P and the secondary deck slab 10S can be further improved, and cracks in the filler material 17 filled in the vertical joints 15 and openings in the vertical joints 15 can be suppressed.

[0049] Embodiment 5 In the displacement-restraining connection device 1 for a deck slab according to embodiment 4, a configuration in which the H-shaped steel 9 is fixed to the deck slabs 10P, 10S using bolts and nuts has been exemplified, but similar to the displacement-restraining connection device 1 for a deck slab according to embodiment 1, the displacement-restraining connection device for a deck slab may also be configured to fix the H-shaped steel 9 to the deck slabs 10P, 10S using a primary side fastening bolt 8A1 and a secondary side fastening bolt 8A2.

[0050] Embodiment 6 In the displacement restraint connection device for deck slabs according to embodiments 4 and 5, an example has been shown in which an H-shaped steel 9 is used as the structural steel, but structural steel other than the H-shaped steel 9, such as a channel steel or an angle steel, may also be used instead of the H-shaped steel 9.

[0051] Embodiment 7 Furthermore, deck slabs that are formed into a rectangular plate shape with a parallelogram-shaped plate surface when viewed from above, that is, deck slabs made of reinforced concrete and formed into a rectangular plate surface with a parallelogram-shaped plate surface, are known, but the deck slab displacement suppression connection device of the present invention can also be applied to lane-specific deck slab replacement construction methods that use such rectangular plate-shaped deck slabs formed into a parallelogram-shaped plate surface.

[0052] In each of the above-described embodiments, it is preferable to introduce prestress into the primary deck slab 10P and the secondary deck slab 10S before removing the deck slab upper surface side connection device and the deck slab lower surface side connection device.

[0053] Furthermore, in the deck displacement restraining connection devices according to embodiments 1 to 3, configurations including spacers 4A and 4B have been exemplified, but the deck displacement restraining connection device according to the present invention may also be configured without including spacers 4A and 4B.

[0054] Furthermore, in each of the above-described embodiments, an example has been given of a displacement-restraining connection device for a deck slab configured using a deck slab upper surface side connection device and a deck slab underside connection device, but the deck slab displacement-restraining connection device may be configured only with a deck slab upper surface side connection device, or may be configured only with a deck slab underside connection device.

[0055] Furthermore, in the present invention, the displacement suppression connection device for deck slabs, which is configured with the above-mentioned connecting member and primary side support member and secondary side support member, only needs to have the above-mentioned wedge function provided by the connecting member and primary side support member and secondary side support member, and there are no particular restrictions on the configurations, shapes, etc. of the primary side support member, secondary side support member, and connecting member.

[0056] Furthermore, in each of the above-described embodiments, examples have been given of a displacement-restraining connection device for deck slabs that uses a component comprising a connecting member, a primary side support member, and a secondary side support member as a connecting member, and a displacement-restraining connection device for deck slabs that uses structural steel such as H-shaped steel as a connecting member, but in the present invention, components of other configurations may also be used as connecting members. That is, the displacement-restraining connecting device for a deck slab according to the present invention may be a displacement-restraining connecting device for a deck slab configured to use, for example, a flat plate-like connecting member such as a flat steel plate as a connecting member. [Explanation of symbols]

[0057] 1 Deck displacement control connection device, 1A Deck top surface connection device, 1B Deck underside connection device, 1X Deck joint device, 2A1, 2B1 Primary side female thread, 2A2, 2B2 Secondary side female thread, 3A, 3B: connecting members; 4A, 4B: spacers; 5A1,5B1 Primary side receiving member, 5A2,5B2 Secondary side receiving member, 6A1~6A4,6B1~6B4 Bolt holes, 7A1,7B1 Primary insertion part, 7A2, 7B2 Secondary side insertion part, 8A1, 8B1 Primary side fastening bolt, 8A2, 8B2 Secondary fastening bolt, 9 H-shaped steel (shaped steel), 10P Primary deck, 10S Secondary deck slab, 10A Upper surface of deck slab, 10B Lower surface of deck slab, 15 Vertical joint, 17 Filler, 80A1, 80B1 Primary bolt, 80A2, 80B2 Secondary bolt, 81A1, 81B1 Primary side nut, 81A2, 81B2 Secondary side nut, 82A1, 82B1 Primary side receiving member fixing nut, 82A2, 82B2 Secondary support member fixing nuts, X bridge axis direction, Y bridge axis perpendicular direction.

Claims

1. In a lane-specific deck replacement method in which the deck is divided and installed in the direction perpendicular to the bridge axis of the bridge, a deck displacement suppression connection device is provided that connects the primary deck and the secondary deck until the filler filled in the vertical joint formed between the first deck installed first and the second deck installed later hardens. The deck displacement suppression connection device is composed of at least one of a deck upper surface side connection device and a deck lower surface side connection device, The deck top surface connection device is configured to include a primary side female threaded portion provided on the primary deck so as to open onto the upper surface of the edge side of the primary deck, a secondary side female threaded portion provided on the secondary deck so as to open onto the upper surface of the edge side of the secondary deck, a connection member installed across the upper surface of the edge side of the primary deck and the upper surface of the edge side of the secondary deck, a primary side fastening bolt passed through a bolt through hole formed in the connection member and fastened to the primary side female threaded portion, and a secondary side fastening bolt passed through a bolt through hole formed in the connection member and fastened to the secondary side female threaded portion. A deck slab underside connection device is characterized in that it is configured with a primary side female threaded portion provided on the primary deck slab so as to open onto the underside of the edge side of the primary deck slab, a secondary side female threaded portion provided on the secondary deck slab so as to open onto the underside of the edge side of the secondary deck slab, a connection member installed across the underside of the edge side of the primary deck slab and the underside of the edge side of the secondary deck slab, a primary side fastening bolt passed through a bolt through hole formed in the connection member and fastened to the primary side female threaded portion, and a secondary side fastening bolt passed through a bolt through hole formed in the connection member and fastened to the secondary side female threaded portion.

2. In a lane-specific deck replacement method in which the deck is divided and installed in the direction perpendicular to the bridge axis of the bridge, a deck displacement suppression connection device is provided that connects the primary deck and the secondary deck until the filler filled in the vertical joint formed between the first deck installed first and the second deck installed later hardens. The deck displacement suppression connection device is composed of at least one of a deck upper surface side connection device and a deck lower surface side connection device, The deck top surface connection device is configured to include a primary side female threaded portion provided on the primary deck so as to open onto the upper surface of the edge side of the primary deck, a secondary side female threaded portion provided on the secondary deck so as to open onto the upper surface of the edge side of the secondary deck, a connection member installed across the upper surface of the edge side of the primary deck and the upper surface of the edge side of the secondary deck, a primary side bolt having one end threaded into the primary side female threaded portion and the other end passed through a bolt through hole formed in the connection member, a primary side nut fastened to the other end side of the primary side bolt that has passed through the bolt through hole, a secondary side bolt having one end threaded into the secondary side female threaded portion and the other end passed through a bolt through hole formed in the connection member, and a secondary side nut fastened to the other end side of the secondary side bolt that has passed through the bolt through hole. A deck slab underside connection device is characterized in that it is configured with: a primary side female threaded portion provided on the primary deck slab so as to open onto the underside of the edge side of the primary deck slab; a secondary side female threaded portion provided on the secondary deck slab so as to open onto the underside of the edge side of the secondary deck slab; a connection member installed across the underside of the edge side of the primary deck slab and the underside of the edge side of the secondary deck slab; a primary side bolt having one end threaded into the primary side female threaded portion and the other end passed through a bolt through hole formed in the connection member; a primary side nut fastened to the other end side of the primary side bolt that has passed through the bolt through hole; a secondary side bolt having one end threaded into the secondary side female threaded portion and the other end passed through a bolt through hole formed in the connection member; and a secondary side nut fastened to the other end side of the secondary side bolt that has passed through the bolt through hole.

3. The connecting member of the deck slab upper surface side connecting device is configured to include a primary side support member installed on the upper surface of the edge side of the primary deck slab, a secondary side support member installed on the upper surface of the edge side of the secondary deck slab, and a connecting member connecting the primary side support member and the secondary side support member, The connecting member of the deck underside connection device is configured to include a primary-side support member installed on the underside of the edge of the primary deck, a secondary-side support member installed on the underside of the edge of the secondary deck, and a connecting member connecting the primary-side support member and the secondary-side support member, The primary-side fastening bolt is passed through a bolt-through hole formed in the primary-side insertion portion of the connecting member and the primary-side receiving member and fastened to the primary-side female thread portion, A displacement suppression connection device for a deck slab as described in claim 1, characterized in that the secondary fastening bolt is passed through a bolt-through hole formed in the secondary insertion portion of the connecting member and the secondary support member and fastened to the secondary female thread portion.

4. The connecting member of the deck slab upper surface side connecting device is configured to include a primary side support member installed on the upper surface of the edge side of the primary deck slab, a secondary side support member installed on the upper surface of the edge side of the secondary deck slab, and a connecting member connecting the primary side support member and the secondary side support member, The connecting member of the deck underside connection device is configured to include a primary-side support member installed on the underside of the edge of the primary deck, a secondary-side support member installed on the underside of the edge of the secondary deck, and a connecting member connecting the primary-side support member and the secondary-side support member, One end of the primary bolt is threaded into the primary female thread portion, and the other end is passed through a bolt-through hole formed in the primary receiving member and the primary insertion portion of the connecting member, and a primary nut is fastened to the other end of the primary bolt that has passed through the bolt-through hole, A displacement suppression connection device for a deck slab as described in claim 2, characterized in that one end of the secondary bolt is threaded into the secondary female thread portion and the other end is passed through a bolt-through hole formed in the secondary receiving member and the secondary insertion portion of the connecting member, and a secondary nut is tightened to the other end of the secondary bolt that has passed through the bolt-through hole.

5. The connecting member of the deck slab upper surface side connecting device is configured to include a primary side support member installed on the upper surface of the edge side of the primary deck slab, a secondary side support member installed on the upper surface of the edge side of the secondary deck slab, and a connecting member connecting the primary side support member and the secondary side support member, The connecting member of the deck underside connection device is configured to include a primary-side support member installed on the underside of the edge of the primary deck, a secondary-side support member installed on the underside of the edge of the secondary deck, and a connecting member connecting the primary-side support member and the secondary-side support member, a primary-side receiving member fixing nut that is fastened to the other end of the primary-side bolt that is passed through a bolt-through hole formed in the primary-side receiving member and fixes the primary-side receiving member to the primary-side bolt; a secondary-side receiving member fixing nut that is fastened to the other end of the secondary-side bolt that is passed through a bolt-through hole formed in the secondary-side receiving member to fix the secondary-side receiving member to the secondary-side bolt, The primary nut is fastened to the other end of the primary bolt that is passed through a bolt-through hole formed in the primary insertion portion of the connecting member, A displacement suppression connection device for a deck slab as described in claim 2, characterized in that the secondary nut is fastened to the other end side of the secondary bolt passed through a bolt-through hole formed in the secondary insertion portion of the connecting member.

6. A displacement suppression connection device for a deck slab as described in any one of claims 3 to 5, characterized in that it is provided with a spacer provided on the primary side support member or the secondary side support member so as to be positioned sandwiched between the primary side support member and the secondary side support member.

7. 3. The displacement-restraining connection device for a deck slab according to claim 1 or 2, wherein the connection member of the deck slab upper surface side connection device and the connection member of the deck slab lower surface side connection device are made of structural steel.

8. 8. The displacement-restraining connection device for deck slabs according to claim 7, wherein the structural steel is an H-shaped steel, and a bolt-through hole is formed in one flange of the H-shaped steel.

9. The displacement-restraining connection device for a deck slab according to claim 1 or 2, characterized in that the displacement-restraining connection device for a deck slab is configured to include a deck slab upper surface side connection device and a deck slab lower surface side connection device.

10. A lane-specific deck replacement method using the deck displacement suppression connection device according to claim 3, A first step involves fabricating primary deck slabs equipped with primary side female threads, installing these primary deck slabs in a line along the bridge axis direction, and joining adjacent primary deck slabs along the bridge axis direction using a deck slab joint device to complete the primary side lane; A second step of fabricating a secondary deck slab equipped with a secondary-side female thread portion and installing the secondary deck slab alongside the existing primary deck slab via a vertical joint along the direction perpendicular to the bridge axis; a third step of connecting the secondary deck and the existing primary deck using a deck displacement suppression connection device; After the third step, a fourth step of filling a filler into the vertical joint between the secondary deck and the existing primary deck; and a fifth step of removing the deck displacement suppression connection device after the fourth step and after the filling material has hardened, The third step is a deck slab upper surface connecting step in which primary-side support members are installed on the upper surfaces of the edge sides of the primary deck slabs that are lined up via vertical joints along the direction perpendicular to the bridge axis, secondary-side support members are installed on the upper surfaces of the edge sides of the secondary deck slabs, and connecting members that connect the primary-side support members and the secondary-side support members are installed, and then primary-side fastening bolts are passed through bolt-through holes formed in the primary-side insertion portions of the connecting members and the primary-side support members and fastened to the primary-side female threaded portions, and secondary-side fastening bolts are passed through bolt-through holes formed in the secondary-side insertion portions of the connecting members and the secondary-side support members and fastened to the secondary-side female threaded portions, thereby forming a deck slab upper surface connecting device; and A lane-specific deck replacement method characterized in that primary side support members are installed on the underside of the edge sides of the primary deck slabs that are lined up via vertical joints along the direction perpendicular to the bridge axis, secondary side support members are installed on the underside of the edge sides of the secondary deck slab, connecting members are installed to connect the primary side support members and the secondary side support members, and then primary side fastening bolts are passed through bolt through holes formed in the primary side insertion portion of the connecting member and the primary side support member and fastened to the primary side female threaded portion, and secondary side fastening bolts are passed through bolt through holes formed in the secondary side insertion portion of the connecting member and the secondary side support member and fastened to the secondary side female threaded portion, thereby comprising at least one step of the deck underside connecting steps that constitute the deck underside connecting device.

11. A lane-specific deck replacement method using the deck displacement suppression connection device according to claim 4, A first step involves fabricating primary deck slabs equipped with primary side female threads, installing these primary deck slabs in a line along the bridge axis direction, and joining adjacent primary deck slabs along the bridge axis direction using a deck slab joint device to complete the primary side lane; A second step of fabricating a secondary deck slab equipped with a secondary-side female thread portion and installing the secondary deck slab alongside the existing primary deck slab via a vertical joint along the direction perpendicular to the bridge axis; a third step of connecting the secondary deck and the existing primary deck using a deck displacement suppression connection device; After the third step, a fourth step of filling a filler into the vertical joint between the secondary deck and the existing primary deck; and a fifth step of removing the deck displacement suppression connection device after the fourth step and after the filling material has hardened, The third step is a deck slab upper surface connecting step in which one end of the primary bolt is screwed into a primary side female threaded portion opening onto the upper surface of the edge side of the primary deck slab, and one end of the secondary bolt is screwed into a secondary side female threaded portion opening onto the upper surface of the edge side of the secondary deck slab, and then the other end of the primary bolt is passed through the bolt through hole of the primary side receiving member to install the primary side receiving member on the upper surface of the edge side of the primary deck slab, and the other end of the secondary bolt is passed through the bolt through hole of the secondary side receiving member to install the secondary side receiving member on the upper surface of the edge side of the secondary deck slab, and then the other end of the primary bolt is passed through a bolt through hole formed in the primary side insertion portion of the connecting member, and the other end of the secondary bolt is passed through a bolt through hole formed in the secondary side insertion portion of the connecting member, and then a primary side nut is fastened to the other end of the primary side bolt that has passed through the bolt through hole, and a secondary side nut is fastened to the other end of the secondary side bolt that has passed through the bolt through hole, thereby forming a deck slab upper surface connecting device; One end of the primary bolt is screwed into the primary female threaded portion that opens onto the underside of the edge of the primary deck slab, and one end of the secondary bolt is screwed into the secondary female threaded portion that opens onto the underside of the edge of the secondary deck slab. Then, the other end of the primary bolt is passed through the bolt through hole of the primary support member, and the primary support member is installed on the underside of the edge of the primary deck slab. The other end of the secondary bolt is passed through the bolt through hole of the secondary support member, and the secondary support member is installed on the underside of the edge of the secondary deck slab. Then, the connecting member is inserted into the primary insertion portion. A lane-specific deck replacement method characterized by including at least one step of the deck underside connection steps that constitute a deck underside connection device, by passing the other end of the primary bolt through a formed bolt through hole, passing the other end of the secondary bolt through a bolt through hole formed in the secondary insertion portion of the connecting member, and then fastening a primary nut to the other end of the primary bolt that has passed through the bolt through hole, and fastening a secondary nut to the other end of the secondary bolt that has passed through the bolt through hole.

12. A lane-specific deck replacement method using the deck displacement suppression connection device according to claim 5, A first step involves fabricating primary deck slabs equipped with primary side female threads, installing these primary deck slabs in a line along the bridge axis direction, and joining adjacent primary deck slabs along the bridge axis direction using a deck slab joint device to complete the primary side lane; A second step of fabricating a secondary deck slab equipped with a secondary-side female thread portion and installing the secondary deck slab alongside the existing primary deck slab via a vertical joint along the direction perpendicular to the bridge axis; a third step of connecting the secondary deck and the existing primary deck using a deck displacement suppression connection device; After the third step, a fourth step of filling a filler into the vertical joint between the secondary deck and the existing primary deck; and a fifth step of removing the deck displacement suppression connection device after the fourth step and after the filling material has hardened, The third step is One end of the primary bolt is screwed into the primary female threaded portion that opens onto the upper surface of the edge side of the primary deck slab, and one end of the secondary bolt is screwed into the secondary female threaded portion that opens onto the upper surface of the edge side of the secondary deck slab. After that, the other end of the primary bolt is passed through the bolt through hole of the primary support member, and a primary support member fixing nut is fastened to the other end of the primary bolt, thereby fixing the primary support member to the upper surface of the edge side of the primary deck slab, and the other end of the secondary bolt is passed through the bolt through hole of the secondary support member, and the secondary support member is fixed to the other end of the secondary bolt. a deck slab upper surface connecting step in which the secondary-side receiving member is fixed to the upper surface of the edge side of the secondary deck slab by tightening a nut, and then the other end of the primary-side bolt is passed through a bolt-through hole formed in the primary-side insertion portion of the connecting member, and the other end of the secondary-side bolt is passed through a bolt-through hole formed in the secondary-side insertion portion of the connecting member, and then a primary-side nut is tightened to the other end of the primary-side bolt that has passed through the bolt-through hole, and a secondary-side nut is tightened to the other end of the secondary-side bolt that has passed through the bolt-through hole, thereby forming a deck slab upper surface connecting device; One end of the primary bolt is screwed into the primary female threaded portion that opens onto the underside of the edge of the primary deck slab, and one end of the secondary bolt is screwed into the secondary female threaded portion that opens onto the underside of the edge of the secondary deck slab. Then, the other end of the primary bolt is passed through the bolt through hole of the primary support member and a primary support member fixing nut is fastened to the other end of the primary bolt, thereby fixing the primary support member to the underside of the edge of the primary deck slab. The other end of the secondary bolt is passed through the bolt through hole of the secondary support member and a secondary support member fixing nut is fastened to the other end of the secondary bolt, thereby fixing the secondary support member to the underside of the edge of the primary deck slab. A lane-specific deck replacement method characterized by including at least one step of the deck top surface connection steps that constitute a deck top surface connection device, by fixing a secondary support member to the underside of the edge side of the deck, passing the other end of the primary bolt through a bolt through hole formed in the primary insertion portion of the connecting member, passing the other end of the secondary bolt through a bolt through hole formed in the secondary insertion portion of the connecting member, and then tightening a primary nut to the other end of the primary bolt that has passed through the bolt through hole, and tightening a secondary nut to the other end of the secondary bolt that has passed through the bolt through hole.

13. A lane-specific deck replacement method using the deck displacement suppression connection device according to claim 8, A first step involves fabricating primary deck slabs equipped with primary side female threads, installing these primary deck slabs in a line along the bridge axis direction, and joining adjacent primary deck slabs along the bridge axis direction using a deck slab joint device to complete the primary side lane; A second step of fabricating a secondary deck slab equipped with a secondary-side female thread portion and installing the secondary deck slab alongside the existing primary deck slab via a vertical joint along the direction perpendicular to the bridge axis; a third step of connecting the secondary deck and the existing primary deck using a deck displacement suppression connection device; After the third step, a fourth step of filling a filler into the vertical joint between the secondary deck and the existing primary deck; and a fifth step of removing the deck displacement suppression connection device after the fourth step and after the filling material has hardened, The third step is a slab upper surface connecting step in which one end of the primary bolt is screwed into the primary female threaded portion opening onto the upper surface of the edge side of the primary deck slab, and one end of the secondary bolt is screwed into the secondary female threaded portion opening onto the upper surface of the edge side of the secondary deck slab, and then the other end of the primary bolt is passed through the bolt through hole of one flange of the H-shaped steel on the upper surface of the edge side of the primary deck slab, and the other end of the secondary bolt is passed through the bolt through hole of one flange of the H-shaped steel on the upper surface of the edge side of the secondary deck slab, thereby installing one flange of the H-shaped steel across the upper surface of the edge side of the primary deck slab and the upper surface of the edge side of the secondary deck slab, and then a primary nut is fastened onto the other end of the primary bolt that has passed through the bolt through hole, and a secondary nut is fastened onto the other end of the secondary bolt that has passed through the bolt through hole, thereby forming a slab upper surface connecting device; One end of the primary bolt is threaded into a primary female threaded portion opening onto the underside of the edge of the primary deck slab, and one end of the secondary bolt is threaded into a secondary female threaded portion opening onto the underside of the edge of the secondary deck slab. Then, the other end of the primary bolt is passed through a bolt through hole in one flange of an H-shaped steel on the underside of the edge of the primary deck slab, and the other end of the secondary bolt is passed through a bolt through hole in one flange of the H-shaped steel on the underside of the edge of the secondary deck slab, thereby installing one flange of the H-shaped steel across the underside of the edge of the primary deck slab and the underside of the edge of the secondary deck slab. Then, a primary nut is fastened to the other end of the primary bolt that has passed through the bolt through hole, and a secondary nut is fastened to the other end of the secondary bolt that has passed through the bolt through hole, thereby providing at least one of the deck underside connecting steps that constitute the deck underside connecting device.

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