Joining structure and joining method

Abstract

To provide a joint structure and a joint method capable of easily performing floor slab replacement work for a bridge accessory.SOLUTION: A joint structure 1 according to an embodiment being a joint structure 1 that joins a floor slab 10 and a precast wall balustrade 50 located at the top of the floor slab 10, comprises: a floor slab insertion hole 12 that penetrates the floor slab 10 in the thickness direction; a bridge accessory insertion hole 57h that opens in an upper surface 58b and a lower surface 57f formed in the precast wall balustrade 50; an anchor member 52 inserted through the floor slab insertion hole 12 and the bridge accessory insertion hole 57h; an upper fixing member 59 that fixes the anchor member 52 to the precast wall balustrade 50 at the upper end of the bridge accessory insertion hole 57h; and a lower fixing member 53 that fixes the anchor member 52 to the floor slab 10 at the lower end of the floor slab insertion hole 12.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a joint structure and a joint method for joining a bridge accessory to a deck slab. [Background technology]

[0002] JP 2015-71907 A describes a mounting structure for a concrete wall balustrade in which a concrete wall balustrade is joined onto a concrete floor slab. In this mounting structure for a concrete wall balustrade, a plurality of concrete wall balustrades are arranged on the concrete floor slab along the longitudinal direction of the roadway.

[0003] The concrete wall balustrade has a fixing attachment portion for attaching an anchor bolt fixed to the concrete slab formed in a recessed position inward from the side surface of the concrete wall balustrade. The fixing attachment portion has an insertion hole formed therein through which the anchor bolt, which is arranged to extend upward while being fixed to the concrete slab, is inserted. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-71907 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the joint structure where bridge accessories are joined to the deck, it is assumed that deck replacement work will be performed. In the above-mentioned concrete wall balustrade mounting structure, the lower end of the anchor bolt is fixed inside the concrete deck, and the upper end of the anchor bolt is fixed to the fixing mounting part of the concrete wall balustrade. Therefore, since the lower end of the anchor bolt is fixed inside the deck and the upper end of the anchor bolt is embedded in the precast wall balustrade block, there is a problem that the deck cannot be easily separated from the precast wall balustrade block.

[0006] In addition, even if the deck is separated from the precast wall balustrade block, the anchor bolts remain fixed to the deck and the precast wall balustrade block, so the work of removing the anchor bolts can be cumbersome. Furthermore, when installing new anchor bolts, insertion holes must be formed again in the deck and the precast wall balustrade block, so the work of installing the new deck can be cumbersome. Therefore, there is a problem that the deck replacement work for bridge accessories such as precast wall balustrade blocks cannot be performed efficiently.

[0007] The present disclosure aims to provide a joint structure and a joint method that can easily perform deck replacement work for bridge accessories. [Means for solving the problem]

[0008] The joining structure according to the present disclosure is a joining structure between a deck slab and a bridge accessory located on top of the deck slab, and comprises a deck insertion hole penetrating in the thickness direction of the deck slab, a bridge accessory insertion hole opening into the upper and lower surfaces formed on the bridge accessory, an anchor member inserted into the deck insertion hole and the bridge accessory insertion hole, an upper fixing member that fixes the anchor member to the bridge accessory at the upper end of the bridge accessory insertion hole, and a lower fixing member that fixes the anchor member to the deck slab at the lower end of the deck insertion hole.

[0009] In this joint structure, the deck insertion hole penetrates the deck in the thickness direction, and the bridge accessory located on the upper part of the deck has bridge accessory insertion holes that open to the upper and lower surfaces. The anchor member is inserted into the deck insertion hole and the bridge accessory insertion hole that penetrate the deck in the thickness direction. The upper part of the anchor member is fixed to the bridge accessory by the upper fixing member, and the lower part of the anchor member is fixed to the deck by the lower fixing member. Therefore, by cutting the bridge accessory together with the anchor member, the anchor member can be pulled out from the lower part of the deck, so that the anchor member can be easily removed. In addition, when the anchor member is cut together with the bridge accessory as described above, the deck can be replaced without damaging the deck. Furthermore, when a new anchor member is installed, the anchor member can be inserted again into the deck insertion hole of the deck, so there is no need to form an insertion hole in the deck again. In other words, the anchor member can be attached and detached to the existing deck insertion hole any number of times, so that the installation work of the new deck can be easily performed. Therefore, the replacement work of deck panels for bridge accessories can be carried out efficiently.

[0010] The above-mentioned joint structure may include a filler filled in the bridge accessory insertion hole and between the bridge accessory and the deck. In this case, by filling the bridge accessory insertion hole with the filler, it is possible to easily adjust the height of the bridge accessory relative to the deck and to improve the unity between the bridge accessory and the deck.

[0011] The above-mentioned joint structure may include a tubular member that is inserted through the bridge accessory insertion hole and the deck insertion hole and covers the outer periphery of the anchor member. In this case, by providing the tubular member between the bridge accessory insertion hole and the deck insertion hole and the anchor member, it is possible to protect the anchor member from water intrusion between the bridge accessory and the deck and to prevent corrosion of the anchor member. In addition, it is possible to make the anchor member easier to remove.

[0012] The bridge accessory may have a ground guard and a recessed portion recessed inwardly in the ground guard, and the upper end of the bridge accessory insertion hole may open in the recessed portion. In this case, the bridge accessory has a recessed portion recessed inwardly in the ground guard, and the upper end of the bridge accessory insertion hole opens in the recessed portion, so that the overall length of the bridge accessory insertion hole can be shortened. Therefore, when filling the bridge accessory insertion hole with a filling material, the amount of filling material can be reduced.

[0013] The bridge attachment is an expansion device provided at the end of the deck in the bridge axis direction, and the expansion device may be embedded in concrete at the top of the deck and equipped with a shear key protruding from the deck into the concrete. In this case, since the expansion device provided at the end of the deck in the bridge axis direction is embedded in concrete, the expansion device can be firmly joined. Also, since it is equipped with a shear key protruding from the deck into the concrete, the shear force can be further increased.

[0014] The joining method according to the present disclosure is a joining method for joining a deck slab and a bridge accessory located on top of the deck slab, and includes the steps of installing a deck slab having a deck insertion hole penetrating in the thickness direction, installing a bridge accessory having bridge accessory insertion holes opening on its top and bottom surfaces, inserting anchor members into the deck slab insertion holes and the bridge accessory insertion holes, fixing the anchor member to the bridge accessory at the upper end of the bridge accessory insertion hole with an upper fixing member, and fixing the anchor member to the deck slab at the lower end of the deck insertion hole with a lower fixing member.

[0015] In this joining method, an anchor member is inserted into the deck insertion hole penetrating in the thickness direction and the bridge accessory insertion hole having openings on the upper and lower surfaces, and the upper end of the anchor member is fixed to the bridge accessory by the upper fixing member, and the lower end of the anchor member is fixed to the deck by the lower fixing member. Therefore, by cutting the bridge accessory together with the anchor member, the anchor member can be pulled out from the lower part of the deck, so that the anchor member can be easily removed and the deck can be replaced without damaging it. Furthermore, when a new anchor member is installed, a new anchor member can be inserted into the deck insertion hole through which the previous anchor member was inserted, so there is no need to form a new insertion hole in the deck, as in the above-mentioned joining structure. Therefore, the anchor member can be attached and detached from the existing deck insertion hole any number of times, so that the installation work of a new bridge accessory can be easily performed and the replacement work of the bridge accessory to the deck can be efficiently performed.

[0016] The bridge accessory includes a wall parapet, and the step of installing the bridge accessory may include a step of adjusting the height of the wall parapet, and may further include a step of filling the bridge accessory insertion holes and the space between the bridge accessory and the deck slab with a filler after the steps of fixing the anchor member to the bridge accessory and fixing the anchor member to the deck slab. In this case, by filling the bridge accessory insertion holes with a filler after adjusting the height of the wall parapet, the integrity of the wall parapet and the deck slab can be improved.

[0017] The bridge accessory includes an expansion device provided at the end of the deck in the bridge axis direction, the step of inserting the anchor member is performed before the step of installing the bridge accessory, the step of installing the bridge accessory includes a step of fixing the expansion device and the anchor member to each other, and the step of fixing the anchor member to the bridge accessory by the upper fixing member may include filling the anchor member and the expansion device with concrete to embed the anchor member and the expansion device in the concrete. In this case, since the expansion device and the anchor member are embedded in the concrete after being fixed to each other, the expansion device and the anchor member can be firmly joined. Effect of the Invention

[0018] According to the present disclosure, replacement work of decks for bridge accessories can be easily carried out. [Brief description of the drawings]

[0019] [Figure 1] 1 is a plan view showing a schematic diagram of a site where deck replacement is carried out to which a joining structure and joining method according to an embodiment are applied. [Diagram 2] FIG. 2 is a side view showing the deck, wall parapet, and median strip at the site of FIG. 1. [Diagram 3] FIG. 3 is a vertical cross-sectional view showing the deck and wall balustrade of FIG. 2. [Figure 4] FIG. 4 is a side view of the wall balustrade of FIG. 3 as viewed from the width direction. [Diagram 5] FIG. 4 is a vertical cross-sectional view showing a mortar injection hole in the wall parapet of FIG. 3. [Figure 6] FIG. 3 is a vertical cross-sectional view showing the median strip in FIG. 2. [Figure 7] FIG. 2 is a longitudinal sectional view showing the expansion device at the site of FIG. 1. [Figure 8] FIG. 1 is a diagram showing a procedure for constructing a deck and a wall balustrade according to an embodiment. [Figure 9] FIG. 9 is a vertical cross-sectional view showing a state in which a wall parapet is installed on the deck of FIG. 8. [Figure 10] FIG. 4 is a vertical cross-sectional view showing the procedure for constructing the deck and the expansion joint according to the embodiment. [Figure 11] 11 is a vertical cross-sectional view showing a continuation of the construction procedure of FIG. 10. [Figure 12] 12 is a vertical cross-sectional view showing a continuation of the construction procedure of FIG. 11. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of a joining structure and a joining method according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated descriptions are omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated for ease of understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

[0021] Fig. 1 is a plan view showing a typical example of a site A where a joint structure and a joint method according to an embodiment are applied. Fig. 2 is a view of the site A viewed along a bridge axis direction D1. As shown in Figs. 1 and 2, the site A where the joint structure 1 and the joint structure 2 are provided is a site where deck slabs of a road D are replaced, and for example, deck slabs 10 and 20 are arranged along the width direction D2 (perpendicular to the bridge axis).

[0022] At least one of the deck 10 and the deck 20 may be made of ultra-high strength fiber-reinforced concrete (UFC). For example, at the site A, replacement work is carried out to replace the existing reinforced concrete deck with the decks 10 and 20, which are UFC decks. The decks 10 and 20, which are UFC decks, are thinner than the existing reinforced concrete decks, for example. As an example, the thickness of the decks 10 and 20 is 140 mm.

[0023] The deck slabs 10 and 20 constitute a road surface portion extending in the bridge axis direction D1 and the width direction D2. That is, the upper surface 11 of the deck slab 10 and the upper surface 21 of the deck slab 20 constitute the road surface of the road D and receive the load of automobiles. The upper surfaces 11 and 21 are, for example, rectangular. The deck slabs 10 and 20 may be, for example, precast decks manufactured in advance at a factory. The deck slabs 10 and 20 have a thickness in the height direction D3.

[0024] The height direction D3 is a direction perpendicular to both the bridge axis direction D1 and the width direction D2, and the bridge axis direction D1 and the width direction D2 are perpendicular to each other. The shapes of the upper surfaces 11 and 21 are not limited to a rectangular shape, and may be, for example, a trapezoid or a sector shape, and can be changed as appropriate. A waterproof layer or an asphalt layer may be provided on the upper surfaces 11 and 21.

[0025] The deck 10 and the deck 20 are supported by a plurality of girder members 30 aligned in the width direction D2 and extending in the height direction D3, and by spacers 40 provided between each girder member 30 and the deck 10 or the deck 20. The girder members 30 are steel members extending in the bridge axis direction D1. For example, the spacers 40 are also interposed between the deck 10 and the deck 20. The spacers 40 are made of, for example, UFC.

[0026] Bridge accessories are provided on the deck 10 and the deck 20. The bridge accessories include, for example, a precast wall parapet, a precast median strip, an expansion device, a sound barrier, and a drainage device. In the example of Fig. 1 and Fig. 2, a pair of precast wall parapets 50 (wall parapets) are provided on each of the ends in the width direction D2 on the deck 10 and the deck 20, and a precast median strip 60 is provided between the deck 10 and the deck 20. Furthermore, an expansion device 70 is provided at the ends of the deck 10 and the deck 20 in the bridge axis direction D1.

[0027] Fig. 3 shows a cross-sectional view of the precast wall parapet 50 and the floor slab 10 cut along a plane extending in the width direction D2 and the height direction D3. As shown in Fig. 3, the joint structure 1 is a joint structure between the floor slab 10 and the precast wall parapet 50 located on the upper part of the floor slab 10. The floor slab 10 has a floor slab insertion hole 12 penetrating in the height direction D3.

[0028] The cross section of the deck slab insertion hole 12 when cut on a plane extending in the bridge axis direction D1 and width direction D2 is, for example, circular. For example, a cylindrical member 51 and an anchor member 52 passing through the inside of the cylindrical member 51 are inserted into the deck slab insertion hole 12. As an example, the cylindrical member 51 is a CD pipe (or a PVC pipe), and the anchor member 52 is an anchor bolt.

[0029] The outer diameter of the tubular member 51 is, for example, smaller than the inner diameter of the deck slab insertion hole 12. The inner diameter of the tubular member 51 is, for example, larger than the outer diameter of the anchor member 52. A lower fixing member 53 that fixes a lower portion of the anchor member 52 is provided at the lower end of the deck slab insertion hole 12. The lower fixing member 53 fixes the anchor member 52 to the deck slab 10 at the lower end of the deck slab insertion hole 12.

[0030] The lower fixing member 53 has, for example, an anchor plate 53c having a through hole 53b through which the anchor member 52 is inserted and which is in face contact with the underside 13 of the deck slab 10, a lower nut 53d into which the anchor member 52 is screwed on the underside of the anchor plate 53c, and a bolt 53f which is screwed into the deck slab 10 from below via the anchor plate 53c.

[0031] The lower fixing member 53 includes, for example, a plurality of bolts 53f. The anchor plate 53c has, in addition to the through holes 53b described above, a plurality of insertion holes 53g through which the bolts 53f are inserted. Further, the inserts 14 are embedded in the lower surface 13 of the deck slab 10 in portions corresponding to the insertion holes 53g.

[0032] The anchor plate 53c is fixed to the lower surface 13 by passing each of the multiple bolts 53f through each insertion hole 53g from below and screwing it into each insert 14. The bolts 53f are, for example, hexagonal bolts, and a washer (for example, a round washer) may be interposed between the bolts 53f and the anchor plate 53c.

[0033] A sealing member 54 and a filler 55 are interposed between the deck 10 and the precast wall balustrade 50. The sealing member 54 is provided, for example, at the lower part of the precast wall balustrade 50 and at each end in the width direction D2. The sealing member 54 is, for example, a packing. The material of the sealing member 54 is, for example, EPDM (ethylene propylene diene rubber).

[0034] For example, of the pair of sealing members 54, the height of the sealing member 54 located at the end side of the floor slab 10 in the width direction D2 is (slightly) higher than the height of the sealing member 54 located at the center side of the floor slab 10 in the width direction D2. The filler material 55 is filled in the space S1 formed between the pair of sealing members 54 interposed between the floor slab 10 and the precast wall balustrade 50. The filler material 55 is, for example, mortar (non-shrink mortar as an example).

[0035] The precast balustrade 50 has, for example, a ground covering portion 56 (ground covering) and a balustrade portion 57 extending vertically upward from the ground covering portion 56. The ground covering portion 56 protrudes toward the center in the width direction D2 at the lower end of the balustrade portion 57. The ground covering portion 56 has, for example, an inclined surface 56b facing diagonally upward, and a vertical surface 56c extending vertically downward from the lower end of the inclined surface 56b.

[0036] The wall balustrade portion 57 has an inner surface 57b facing the center in the width direction D2, a top surface 57c, an outer surface 57d facing the end side in the width direction D2, and a bottom surface 57f. A space S1 is defined by the bottom surface 57f, the pair of sealing members 54, and the top surface 11 of the deck 10. The inner surface 57b extends from the upper end of the ground covering portion 56 in the height direction D3.

[0037] Top surface portion 57c extends from the upper end of inner surface 57b to the upper end of outer surface 57d. Top surface portion 57c may have, for example, an inclined surface that becomes higher from inner surface 57b toward outer surface 57d. Chamfers may be formed on the end of top surface portion 57c on the inner surface 57b side and the end of top surface portion 57c on the outer surface 57d side.

[0038] Fig. 4 is a side view showing the inner surface 57b of the wall balustrade portion 57 and the ground covering portion 56. As shown in Fig. 3 and Fig. 4, for example, an insert 57g is provided on the top surface portion 57c of the wall balustrade portion 57. The wall balustrade portion 57 includes, for example, a plurality of inserts 57g (two, for example) aligned along the bridge axis direction D1.

[0039] The precast wall balustrade 50 has a recessed portion 58 recessed inward from an inner surface 57b of the wall balustrade portion 57 and an inclined surface 56b of the ground cover portion 56. The wall balustrade portion 57 has a plurality of recessed portions 58 aligned along the bridge axis direction D1. The recessed portion 58 is defined by an upper surface 58b in which a bridge accessory insertion hole 57h described later is formed, an inner surface 58c extending in the height direction D3 at the end of the inner surface 58 on the far side, and a ceiling surface 58d extending from the upper end of the inner surface 58c to the inner surface 57b. The upper surface 58b extends, for example, in the bridge axis direction D1 and the width direction D2, and the ceiling surface 58d may be inclined upward as it moves away from the inner surface 58c.

[0040] A bridge accessory insertion hole 57h opens in an upper surface 58b of the recessed portion 58. The bridge accessory insertion hole 57h has, for example, a cylindrical shape. The inner diameter of the bridge accessory insertion hole 57h is larger than the inner diameter of the deck slab insertion hole 12 of the deck slab 10 described above. As an example, the inner diameter of the bridge accessory insertion hole 57h may gradually increase from the upper surface 58b downward.

[0041] A cylindrical member 51 extending upward from the deck slab insertion hole 12 and an anchor member 52 passing through the inside of the cylindrical member 51 are inserted into the bridge accessory insertion hole 57h. An upper fixing member 59 that fixes the upper part of the anchor member 52 is provided at the upper end of the bridge accessory insertion hole 57h. The upper fixing member 59 fixes the anchor member 52 to the precast wall parapet 50 at the upper end of the bridge accessory insertion hole 57h.

[0042] The upper fixing member 59 includes, for example, an anchor plate 59c having a through hole 59b through which the anchor member 52 is inserted and in face contact with the upper surface 58b of the precast wall balustrade 50, and an upper nut 59d into which the anchor member 52 is screwed onto the upper surface of the anchor plate 59c.

[0043] For example, the upper end of the cylindrical member 51 faces the lower surface of the anchor plate 59c. That is, the upper end of the cylindrical member 51 reaches the vicinity of the anchor plate 59c. Note that the upper end of the cylindrical member 51 may be provided with a caulking 51b for sealing the cylindrical member 51. The caulking 51b is, for example, an elastic sealing material. As an example, the upper nut 59d is a hexagonal nut, and a washer (for example, a round washer) may be interposed between the upper nut 59d and the anchor plate 59c.

[0044] The above-mentioned space S1, recessed portion 58, and bridge accessory insertion hole 57h are filled with filler 55. The bridge accessory insertion hole 57h forms a filling area for the filler 55 on the radial outside of the anchor member 52 and on the radial outside of the tubular member 51. As shown in Figures 3, 4, and 5, the precast wall balustrade 50 has, for example, injection holes 50b through which the filler 55 is injected into the space S1, the bridge accessory insertion hole 57h, and the recessed portion 58.

[0045] The injection hole 50b is provided, for example, at a location different from the recessed portion 58, and as one example, is provided at a position adjacent to the recessed portion 58 in the bridge axis direction D1. The precast wall balustrade 50 has multiple injection holes 50b, and for example, the multiple injection holes 50b are lined up along the bridge axis direction D1. The injection holes 50b extend obliquely downward from the inclined surface 56b of the ground covering portion 56, and the lower end of the injection hole 50b communicates with the space S1.

[0046] The filler 55 injected into the space S1 through the injection hole 50b enters the bridge accessory insertion hole 57h from the space S1, rises in the bridge accessory insertion hole 57h, and reaches each of the multiple recesses 58. Then, the filler 55 is formed by embedding the anchor members 52 and the upper fixing members 59 and leveling the surface to the inclined surface 56b and the inner surface 57b.

[0047] Next, a joint structure 2 between a precast median strip 60 and a deck 10 will be described with reference to Fig. 6. Fig. 6 shows an example in which the bridge accessory is a precast median strip 60. The joint structure 2 is a joint structure between the deck 10 and the precast median strip 60 located on top of the deck 10. A portion of the configuration of the joint structure 2 is the same as a portion of the configuration of the joint structure 1 described above, and therefore a description that overlaps with the joint structure 1 will be omitted as appropriate.

[0048] The deck 10 has a plurality of deck insertion holes 12 aligned along the width direction D2, and a cylindrical member 61 and an anchor member 62 passing through the inside of the cylindrical member 61 are inserted into each deck insertion hole 12. The cylindrical member 61 and the anchor member 62 may be the same as the cylindrical member 51 and the anchor member 52 described above, for example.

[0049] The joint structure 2 includes a pair of tubular members 61 and a pair of anchor members 62 aligned along the width direction D2. A lower fixing member 63 that fixes a lower portion of the anchor member 62 is provided at the lower end of each deck slab insertion hole 12. The lower fixing member 63 fixes the anchor member 62 to the deck slab 10 at the lower end of the deck slab insertion hole 12.

[0050] The lower fixing member 63, like the lower fixing member 53 described above, has an anchor plate 63c having a through hole 63b through which the anchor member 62 is inserted and in surface contact with the underside 13 of the deck 10, a lower nut 63d into which the anchor member 62 is screwed on the underside of the anchor plate 63c, and a bolt 63f screwed into the deck 10 from below via the anchor plate 63c. In addition to the through hole 63b described above, the anchor plate 63c has a plurality of insertion holes through which the bolts 63f are inserted. Also, inserts similar to the inserts 14 described above are embedded in the portions of the underside 13 of the deck 10 corresponding to each bolt 63f.

[0051] Similar to the sealing member 54 and the filler 55 described above, a sealing member 64 and a filler 65 are interposed between the deck 10 and the precast central median strip 60. The filler 65 is filled in a space S2 formed between a pair of sealing members 64 interposed between the deck 10 and the precast central median strip 60.

[0052] The precast median strip 60 has, for example, a pair of guardrail portions 66 (guardrails) aligned in the width direction D2, and a balustrade portion 67 extending upward from the upper ends of the pair of guardrail portions 66. The guardrail portions 66 protrude in the width direction D2 at the lower ends of the balustrade portions 67. The guardrail portions 66 have, for example, an inclined surface 66b facing diagonally upward, and a vertical surface 66c extending vertically downward from the lower end of the inclined surface 66b.

[0053] The balustrade portion 67 has a pair of side surfaces 67b facing the width direction D2, a top surface portion 67c, and a bottom surface 67f. For example, the pair of side surfaces 67b extend obliquely upward so that the width of the balustrade portion 67 narrows from the ground covering portion 66 toward the top surface portion 67c. The top surface portion 67c connects the pair of side surfaces 67b to each other, and extends, for example, along the bridge axis direction D1 and the width direction D2.

[0054] The precast median strip 60 includes, for example, tendons 60b that pass through the through holes 67d of the parapet 67 along the bridge axis direction D1. The tendons 60b are provided to tension the multiple precast median strips 60 that are lined up along the bridge axis direction D1. The tendons 60b are, for example, PC steel materials such as PC steel wires, PC steel bars, or PC steel strands. As an example, the tendons 60b are after-bond PC steel strands.

[0055] The precast median strip 60 has a recessed portion 68 recessed inward from the inclined surface 66b of the ground cover portion 66. The parapet portion 67 has a pair of recessed portions 68 aligned along the width direction D2. Like the recessed portion 58 described above, each recessed portion 68 is defined by an upper surface 68b in which a bridge accessory insertion hole 67h is formed, an inner surface 68c extending in the height direction D3 at the rear end of the recessed portion 68, and a ceiling surface 68d extending from the upper end of the inner surface 68c to the side surface 67b.

[0056] A cylindrical member 61 and an anchor member 62 are inserted into each of a pair of bridge accessory insertion holes 67h aligned along the width direction D2. An upper fixing member 69 that fixes an upper portion of the anchor member 62 is provided at the upper end of the bridge accessory insertion hole 67h. The upper fixing member 69 includes an anchor plate 69c having a through hole through which the anchor member 62 is inserted, and an upper nut 69d, similar to the above-mentioned upper fixing member 59, for example. For example, a caulking similar to the caulking 51b that seals the cylindrical member 61 is provided between the upper end of the cylindrical member 61 and the anchor plate 69c.

[0057] The space S2, the recessed portion 68, and the bridge accessory insertion hole 67h are filled with a filler material 65. The precast median strip 60 has an injection hole for injecting the filler material 65 into the space S2, the recessed portion 68, and the bridge accessory insertion hole 67h, similar to the injection hole 50b of the precast wall parapet 50. The filler material 65 is injected into the space S2 through the injection hole, and the filler material 65 enters the bridge accessory insertion hole 67h from the space S2, rises in the bridge accessory insertion hole 67h, and reaches each of the recessed portions 68. The filler material 65 is formed by burying the anchor members 62 and the upper fixing members 69 and leveling the surface to the inclined surface 66b.

[0058] Next, a joint structure 3 between an expansion device 70 and a deck slab 10 will be described with reference to Fig. 7. For example, the expansion device 70 is provided at the end of the deck slab 10 in the bridge axis direction D1. The joint structure 3 includes the expansion device 70 and concrete 71. Fig. 7 shows an example in which the deck slab 10 is a newly constructed UFC deck, and is joined to a deck F which is an existing RC deck.

[0059] The joint structure 3 comprises a deck 10, an expansion device 70 located on the upper part of the deck 10, and concrete 71. The concrete 71 has a function of fixing, for example, an anchor member 82 described below. For example, the expansion device 70 and the concrete 71 are provided in a step portion 15 provided at the end of the deck 10 in the bridge axis direction D1. The step portion 15 has a recessed portion 15b recessed from the end of the upper surface 11 of the deck 10 in the bridge axis direction D1, and the expansion device 70 is provided in the recessed portion 15b.

[0060] As an example, the expansion device 70 is interposed between the deck 10 and the deck F. The expansion device 70 includes, for example, a joint portion 72 interposed between the deck 10 and the deck F, a plurality of first reinforcing bars 73 extending from the joint portion 72 in the bridge axis direction D1, and a plurality of second reinforcing bars 74 extending in the bridge width direction D2.

[0061] The joint portion 72 is provided, for example, so as to meander in a plan view, and may be provided with elastic rubber. For example, a plurality of first reinforcing bars 73 are arranged in line along the width direction D2, and a plurality of second reinforcing bars 74 are arranged in line along the bridge axis direction D1. As an example, the first reinforcing bars 73 are main reinforcing bars of the expansion device 70, and the second reinforcing bars 74 are reinforcing bars of the expansion device 70.

[0062] For example, the existing deck F has a step portion F1 in which a recessed portion F2 is formed, similar to the deck 10, and a concrete anchor F3 is embedded in the bottom surface of the recessed portion F2. The concrete anchor F3 is, for example, a metal expansion anchor (post-installed anchor). In the concrete anchor F3, an anchor bolt F4 protruding from the bottom surface of the recessed portion F2, a first reinforcing bar 73, and a second reinforcing bar 74 are fixed to each other. For example, the anchor bolt F4, the first reinforcing bar 73, and the second reinforcing bar 74 are embedded in the concrete 71 while being fixed to each other by welding.

[0063] The deck 10 has a deck insertion hole 12 penetrating in the height direction D3 in the recessed portion 15b of the step portion 15. The deck 10 has, for example, a plurality of deck insertion holes 12, which are aligned along the bridge axis direction D1. For example, a cylindrical member 81 and an anchor member 82 passing through the inside of the cylindrical member 81 are inserted into the deck insertion hole 12. The respective configurations of the cylindrical member 81 and the anchor member 82 are the same as, for example, the respective configurations of the cylindrical member 51 and the anchor member 52 described above.

[0064] A lower fixing member 83 that fixes a lower portion of the anchor member 82 is provided at the lower end of the deck slab insertion hole 12. The lower fixing member 83 has, for example, a through hole 83b through which the anchor member 82 is inserted and a washer 83c that is in surface contact with the underside 13 of the deck slab 10, and a lower nut 83d into which the anchor member 82 is screwed onto the underside of the washer 83c.

[0065] The cylindrical member 81 protrudes upward from the bottom surface of the recessed portion 15b. For example, a caulking 81b for sealing the cylindrical member 81 to prevent water from entering is provided at the upper end of the cylindrical member 81. The caulking 81b is, for example, an elastic sealing material. An upper portion of the anchor member 82 protrudes upward beyond the cylindrical member 81.

[0066] An upper nut 84 is screwed onto the upper part of the anchor member 82, and for example, the upper nut 84 is spaced apart from the upper end of the tubular member 81. The upper nut 84 has a function of preventing the expansion device 70 from falling. Specifically, the upper nut 84 supports the first reinforcing bar 73 extending from the joint part 72 in the bridge axis direction D1 so as not to fall. In other words, the first reinforcing bar 73 is placed on the upper nut 84.

[0067] For example, the first reinforcing bars 73 and the second reinforcing bars 74 are arranged in a lattice pattern in a plan view, and the anchor member 82 is fixed (or temporarily fixed) to the portion where the first reinforcing bars 73 and the second reinforcing bars 74 intersect. As an example, the anchor member 82 is fixed to both the first reinforcing bars 73 and the second reinforcing bars 74 by welding. However, the means for fixing the anchor member 82 to the expansion device 70 is not limited to welding. For example, the anchor member 82 may be fixed to the first reinforcing bars 73 and the second reinforcing bars 74 by a cable tie.

[0068] A shear key 90 protruding from the deck 10 into the concrete 71 is provided in the recessed portion 15b of the deck 10. For example, the shear key 90 includes an insert 91 embedded in a location in the recessed portion 15b of the deck 10 different from the deck insertion hole 12, and a bolt 92 screwed into the insert 91.

[0069] As an example, the insert 91 is a ceramic insert, and the bolt 92 is a hexagonal bolt. The bolt 92 has a head 92b that protrudes upward in the recessed portion 15b, and for example, a washer may be interposed between the head 92b and the bottom surface of the recessed portion 15b. In this case, the protruding height of the shear key 90 can be adjusted by adjusting the number of washers.

[0070] Next, an example of a construction method for each part at the site A will be described. First, an example of a joining method for joining a precast wall parapet 50 and a deck 10 will be described. As shown in Fig. 8, for example, a deck 10 is prepared in which a deck insertion hole 12 and an insert 14 are formed and a cylindrical member 51 is fixed to the deck insertion hole 12. Then, the deck 10 is hoisted by a lifting machine such as a crane, and the deck 10 is placed on the girder material 30 via the filler material 40 (step of installing the deck).

[0071] Then, as shown in Figure 9, a pair of sealing members 54 are positioned, and the planar position of the bridge accessory insertion hole 57h of the precast wall parapet 50 is aligned with the planar position of the deck insertion hole 12 of the deck slab 10, and with the planar positions aligned, the precast wall parapet 50 is placed on the upper surface 11 of the deck slab 10 (process of installing the bridge accessory).

[0072] Also, the tubular member 51 and the anchor member 52 are inserted from below into the deck slab insertion hole 12 and the bridge accessory insertion hole 57h (step of inserting the anchor member). Then, the height of the precast wall balustrade 50 is adjusted. Specifically, the height of the top surface 57c of the wall balustrade portion 57 of the precast wall balustrade 50 is adjusted to a predetermined height (step of adjusting the height of the wall balustrade). After that, the lower part of the anchor member 52 is fixed to the deck slab 10 with the lower fixing member 53 (step of fixing the anchor member to the deck). Then, the upper part of the anchor member 52 is fixed to the precast wall balustrade 50 with the upper fixing member 59 (step of fixing the anchor member to the bridge accessory).

[0073] Specifically, the process of fixing the anchor member to the deck is performed by aligning the planar position of the insertion hole 53g of the lower fixing member 53 with the planar position of the insert 14, passing the lower part of the anchor member 52 through the through hole 53b of the anchor plate 53c, and screwing the lower nut 53d into the underside of the anchor plate 53c.

[0074] Then, bolts 53f are screwed into the insertion holes 53g and the inserts 14, respectively, to fix the anchor plate 53c to the underside 13 of the deck 10. Specifically, the process of fixing the anchor member to the bridge attachment involves passing the upper part of the anchor member 52 through the through hole 59b of the anchor plate 59c, and screwing an upper nut 59d into the upper side of the anchor plate 59c.

[0075] As described above, after the lower part of the anchor member 52 is fixed to the deck 10 and the upper part of the anchor member 52 is fixed to the precast wall parapet 50, the filler 55 is filled (step of filling with filler). Specifically, after the formwork is installed, the filler 55 is injected into the injection hole 50b before hardening to fill the space S1 with the filler 55, and the filling is continued until it is about to overflow from the recessed portion 58. Thereafter, the surface of the filler 55 is leveled and the filler 55 is allowed to harden over time, after which the formwork is removed, and the joint structure 1 shown in, for example, FIG. 3 is completed.

[0076] The joining method for joining the precast median strip 60 and the deck 10 may be, for example, the same as the joining method for the precast wall parapet 50 and the deck 10. The joining method for the precast median strip 60 and the deck 10 differs from the joining method for the precast wall parapet 50 and the deck 10 in that, as shown in Fig. 6, for example, a tendon 60b is provided.

[0077] The tensioning of the precast median strip 60 by the tendons 60b is performed, for example, before the fastening of the anchor members 62 (fixing of the lower part of the anchor member 62 by the lower fixing member 63, and fixing of the anchor member 62 by the upper fixing member 69). Specifically, the tendons 60b are passed through the through holes 67d of the parapet 67 to tension the precast median strip 60 in the bridge axis direction D1. Note that the timing of tensioning the precast median strip 60 is not limited to before the fastening of the anchor members 62, and may be after the anchor members 62 are fastened.

[0078] Next, an example of a joining method for joining the expansion device 70 and the deck 10 will be described. Below, a method for updating the expansion device 70 to a new expansion device 70 together with updating the deck 10 will be described with reference to Fig. 10 to Fig. 12. First, as shown in Fig. 10, for example, concrete 71 is cut along a cutting line L along the inner surface and bottom surface of the recessed portion 15b of the deck 10 and the inner surface and bottom surface of the recessed portion F2 of the deck F.

[0079] The concrete 71 is cut by, for example, a wire saw. This cutting of the concrete 71 is performed at a position higher than the upper end of the tubular member 81, and the anchor member 82 and the anchor bolt F4 are cut while avoiding cutting the tubular member 81. At this time, the anchor member 82 can be pulled out from below the deck slab 10, but the anchor bolt F4 cannot be pulled out from below.

[0080] 10 and 11, the cut expansion device 70, concrete 71, anchor member 82, and anchor bolt F4 are removed, and the concrete 71 remaining on the bottom surface of the recessed portion 15b is chipped away to cause the tubular member 81 and shear key 90 to protrude from the bottom surface of the recessed portion 15b. At this time, the concrete anchor F3 is left behind on the deck F.

[0081] Thereafter, as shown in FIG. 12, a new insertion hole is formed in the bottom surface of the recessed portion F2 of the deck F, a new concrete anchor F3 is installed in the insertion hole, and the anchor bolt F4 of the concrete anchor F3 is fixed to the first reinforcing bar 73 and the second reinforcing bar 74 of the new expansion device 70 by welding or the like.

[0082] Meanwhile, for the deck 10, a new anchor member 82 is inserted into the existing tubular member 81 (anchor member insertion step). Then, the lower part of the anchor member 82 is fixed with a lower fixing member 83, and the expansion device 70 is installed (bridge accessory installation step). After the expansion device 70 is installed, the anchor member 82 is fixed to the first reinforcing bar 73 and the second reinforcing bar 74 via an upper nut 84 by welding or the like (step of fixing the expansion device and anchor member to each other). Note that anti-rust treatment may be applied to the portion of the anchor member 82 exposed from the tubular member 81, etc.

[0083] As described above, in the deck 10, the existing tubular member 81 inserted into the deck insertion hole 12 can be used, so the anchor member 82 can be easily and smoothly installed. Furthermore, since there is no need to form a new insertion hole for inserting the anchor, it is possible to prevent the deck 10 from being damaged.

[0084] Then, a formwork is installed and concrete 71 is poured into the recessed portion 15b and the recessed portion F2, and the expansion device 70, the tubular member 81, the anchor member 82, and the anchor bolt F4 are embedded in the concrete 71 and the concrete 71 is hardened (a process of fixing the anchor member to the expansion device by the upper fixing member) as shown in Fig. 7. After that, the formwork is removed and the joint structure 3 between the deck slab 10 and the expansion device 70 is completed.

[0085] Next, the effects obtained from the joint structure 1 and the joint method according to this embodiment will be described. As shown in Fig. 3, in the joint structure 1 and the joint method according to this embodiment, the deck insertion hole 12 penetrates the deck 10 in the thickness direction (height direction D3), and the precast wall balustrade 50 located at the upper part of the deck 10 has the bridge accessory insertion hole 57h having openings on the upper surface 58b and the lower surface 57f.

[0086] The anchor member 52 is inserted through the deck 10 insertion hole 12 and the bridge accessory insertion hole 57h that penetrate the deck 10 in the thickness direction. The upper end of the anchor member 52 is fixed to the precast wall balustrade 50 by an upper fixing member 59, and the lower end of the anchor member 52 is fixed to the deck 10 by a lower fixing member 53. Therefore, by cutting the precast wall balustrade 50 together with the anchor member 52 (for example, cutting along the horizontal plane at the height of the inclined surface 56b), the anchor member 52 can be pulled out from the lower part of the deck 10, and the anchor member 52 can be easily removed.

[0087] Also, when the anchor members 52 are cut together with the precast wall balustrade 50 as described above, the deck slab 10 can be replaced without damaging the deck slab 10. Furthermore, when installing new anchor members 52, the anchor members 52 can be inserted again into the deck slab insertion holes 12 of the deck slab 10, so there is no need to form insertion holes in the deck slab 10 again.

[0088] That is, since the anchor members 52 can be attached and detached any number of times to the existing deck insertion holes 12, there is no need to form insertion holes, and therefore the installation work of the new deck 10 can be performed easily and efficiently. Therefore, the replacement work of the deck 10 with the precast wall parapet 50 can be performed efficiently.

[0089] The joint structure 1 includes a filler 55 filled in the bridge accessory insertion hole 57h and between the precast wall balustrade 50 and the deck 10. Thus, by filling the bridge accessory insertion hole 57h with the filler 55, it is possible to easily adjust the height of the precast wall balustrade 50 relative to the deck 10, and also to improve the unity between the precast wall balustrade 50 and the deck 10.

[0090] The joint structure 1 is provided with a tubular member 51 that is passed through the bridge accessory insertion hole 57h and the deck slab insertion hole 12 and covers the outer periphery of the anchor member 52. Therefore, by providing the tubular member 51 between the bridge accessory insertion hole 57h and the deck slab insertion hole 12 and the anchor member 52, the anchor member 52 can be protected from water seeping between the precast wall balustrade 50 and the deck slab 10, and corrosion of the anchor member 52 can be prevented. In addition, the anchor member 52 can be made easier to remove. The above-mentioned effects can also be obtained from the joint structure 2 between the precast central median strip 60 and the deck slab 10, and the joint structure 3 between the expansion device 70 and the deck slab 10.

[0091] The precast wall parapet 50 has a ground cover portion 56 and a recessed portion 58 recessed inwardly at the ground cover portion 56, and the upper end of the bridge accessory insertion hole 57h opens at the recessed portion 58. Therefore, since the precast wall parapet 50 has the recessed portion 58 recessed inwardly at the ground cover portion 56, and the upper end of the bridge accessory insertion hole 57h opens at the recessed portion 58, the overall length of the bridge accessory insertion hole 57h can be shortened. Therefore, when filling the bridge accessory insertion hole 57h with the filler material 55, the amount of the filler material 55 can be reduced. This effect can also be obtained from the joint structure 2 between the precast median strip 60 and the deck 10.

[0092] As shown in Fig. 7, the bridge attachment is, for example, an expansion device 70 provided at the end of the deck 10 in the bridge axis direction D1, and the expansion device 70 is embedded in concrete 71 at the top of the deck 10 and has a shear key 90 protruding from the deck 10 into the concrete 71. Therefore, since the expansion device 70 provided at the end of the deck 10 in the bridge axis direction D1 is embedded in the concrete 71, the expansion device 70 can be firmly joined. In addition, since the shear key 90 protruding from the deck 10 into the concrete 71 is provided, the shear force can be further increased.

[0093] In the joining method according to the present embodiment, the bridge accessory includes a precast wall parapet 50 as shown in Fig. 3, and the step of installing the bridge accessory includes a step of adjusting the height of the wall parapet 57, a step of fixing the anchor member 52 to the precast wall parapet 50, and a step of filling the filler 55 into the bridge accessory insertion hole 57h and between the precast wall parapet 50 and the deck 10 after the step of fixing the anchor member 52 to the deck 10. Therefore, by filling the filler 55 into the bridge accessory insertion hole 57h after adjusting the height of the precast wall parapet 50, the unity between the precast wall parapet 50 and the deck 10 can be improved. The above-mentioned effects can also be obtained from the precast median strip 60.

[0094] 7, the bridge attachment includes an expansion device 70 provided at the end of the deck 10 in the bridge axis direction D1, and a step of inserting an anchor member 82 is performed before a step of installing the expansion device 70, and the step of installing the expansion device 70 includes a step of fixing the expansion device 70 and the anchor member 82 to each other, and in the step of fixing the anchor member 82 to the expansion device 70 with concrete 71, the anchor member 82 and the expansion device 70 are filled with concrete 71 to embed the anchor member 82 and the expansion device 70 in the concrete 71. Therefore, since the expansion device 70 and the anchor member 82 are embedded in the concrete 71 after the expansion device 70 and the anchor member 82 are fixed to each other, the expansion device 70 and the anchor member 82 can be firmly joined to each other.

[0095] The above describes the embodiments of the joining structure and joining method according to the present disclosure. However, the joining structure and joining method according to the present disclosure are not limited to the above-mentioned embodiments, and can be modified as appropriate within the scope of the gist described in the claims. In other words, the shape, size, number, material, and arrangement of each part of the joining structure, as well as the content and order of each step of the joining method, may be modified as appropriate within the scope of the gist described above.

[0096] For example, in the above embodiment, the joint structure 3 provided with the shear key 90 has been described. However, the configuration of the shear key 90 is not limited to the configuration including the insert 91 and the bolt 92 described above and can be appropriately changed. In addition, the joint structure of the expansion device 70 may not include the shear key 90.

[0097] In the above-described embodiment, the deck 10 in which the deck insertion hole 12 and the insert 14 are formed has been described. However, the shape, size, number and arrangement of the deck insertion hole and the insert are not limited to the above-described embodiment and can be appropriately changed. In addition, the deck may not have the insert 14.

[0098] In the above embodiment, the joint structure 1 is filled with the filler 55, which is non-shrink mortar. However, the material of the filler is not limited to non-shrink mortar and can be changed as appropriate. Furthermore, the joint structure according to the present disclosure may be a joint structure that is not filled with a filler.

[0099] In the above embodiment, an example has been described in which the anchor member 52 is an anchor bolt. However, the anchor member may be something other than an anchor bolt. For example, the anchor member may be a PC steel bar, a tendon, a tension member, a cable-like member, or the like, and may be modified as appropriate.

[0100] In the above embodiment, a description has been given of a site A of a road D equipped with a joint structure 1 that joins the deck 10 and a precast wall parapet 50, a joint structure 2 that joins the deck 10 and a precast median strip 60, and a joint structure 3 that joins the deck 10 and an expansion device 70. However, the joint structure and the joint method according to the present disclosure can be applied to various sites other than the site A of the road D, and the type of the site is not particularly limited. [Explanation of symbols]

[0101] 1,2,3... Joint structure, 10,20... Deck, 11,21... Upper surface, 12... Deck insertion hole, 13... Lower surface, 14... Insert, 15... Step, 15b... Concave portion, 30... Beam, 40... Filling material, 50... Precast wall railing (bridge attachment, wall railing), 50b... Injection hole, 51... Cylindrical member, 51b... Caulking, 52... Anchor member, 53... Lower fixing member, 53b... Through hole, 53c... Anchor plate, 53d... Lower nut, 53f... Bolt, 53g... Insertion hole, 54... Sealing member, 55... Filler, 56...ground cover part (ground cover), 56b...inclined surface, 56c...vertical surface, 57...wall balustrade part, 57b...inner surface, 57c...top surface, 57d...outer surface, 57f...lower surface, 57g...insert, 57h...bridge accessory insertion hole, 58...recessed part, 58b...upper surface, 58c...inner surface, 58d...ceiling surface, 59...upper fixing member, 59b...through hole, 59c...anchor plate, 59d...upper nut, 60...precast median strip (bridge accessory), 60b...tension member, 61...tubular member, 62...anchor member, 63...lower fixing member fixing member, 63b...through hole, 63c...anchor plate, 63d...lower nut, 63f...bolt, 64...sealing member, 65...filler, 66...ground cover part (ground cover), 66b...inclined surface, 66c...vertical surface, 67...parapet part, 67b...side surface, 67c...top surface, 67d...through hole, 67f...bottom surface, 67h...bridge accessory insertion hole, 68...recessed part, 68b...top surface, 68c...inner surface, 68d...ceiling surface, 69...upper fixing member, 69b...through hole, 69c...anchor plate, 69d...nut, 70...expansion device (bridge accessories), 71...concrete (upper fixing member), 72...joint, 73...first reinforcing bar, 74...second reinforcing bar, 81...tubular member, 81b...caulking, 82...anchor member, 83...lower fixing member, 83b...through hole, 83c...washer, 83d...lower nut, 84...upper nut, 90...shear key, 91...insert, 92...bolt, 92b...head, A...site, D...road, D1...bridge axis direction, D2...width direction (perpendicular to the bridge axis), D3...height direction, L...cutting line, S1,S2...space.

Claims

1. A joint structure between a deck and a bridge attachment located on top of the deck, A deck insertion hole penetrating in the thickness direction of the deck; A bridge accessory insertion hole opening on an upper surface and a lower surface formed in the bridge accessory; An anchor member inserted into the deck insertion hole and the bridge accessory insertion hole; An upper fixing member that fixes the anchor member to the bridge accessory at an upper end of the bridge accessory insertion hole; A lower fixing member that fixes the anchor member to the deck at a lower end of the deck insertion hole; Equipped with The lower fixing member has an anchor plate having a through hole through which the anchor member is inserted and in surface contact with the underside of the deck, a lower nut into which the anchor member is screwed on the underside of the anchor plate, and a plurality of bolts screwed into the deck from below via the anchor plate, The anchor plate has a plurality of insertion holes through which the bolts are inserted, and inserts are embedded in the lower surface of the deck corresponding to the insertion holes, The anchor plate is fixed to the underside of the deck by passing each of the bolts through each of the insertion holes from below and screwing them into each of the inserts. Joint structure.

2. A filler is provided in the bridge attachment insertion hole and between the bridge attachment and the deck. The joint structure according to claim 1 .

3. A cylindrical member is provided which is passed through the bridge accessory insertion hole and the deck insertion hole and covers an outer periphery of the anchor member. The joint structure according to claim 1 or 2.

4. The bridge attachment includes a ground guard and a recessed portion recessed inwardly in the ground guard, The upper end of the bridge accessory insertion hole is open in the recessed portion. The joint structure according to any one of claims 1 to 3.

5. Further comprising an expansion device provided at the end of the deck in the bridge axis direction, The expansion joint is embedded in concrete at the top of the deck, a shear key protruding from the deck into the concrete; The joint structure according to any one of claims 1 to 4.

6. A joining method for joining a deck and a bridge attachment located on an upper portion of the deck, comprising: A step of installing the deck having a deck insertion hole penetrating in a thickness direction; a step of installing the bridge accessory having a bridge accessory insertion hole opening on an upper surface and a lower surface; A step of inserting an anchor member into the deck insertion hole and the bridge accessory insertion hole; Fixing the anchor member to the bridge attachment by an upper fixing member at an upper end of the bridge attachment insertion hole; Fixing the anchor member to the deck by a lower fixing member at a lower end of the deck insertion hole; Equipped with The lower fixing member has an anchor plate having a through hole through which the anchor member is inserted and in surface contact with the underside of the deck, a lower nut into which the anchor member is screwed on the underside of the anchor plate, and a plurality of bolts screwed into the deck from below via the anchor plate, The anchor plate has a plurality of insertion holes through which the bolts are inserted, and inserts are embedded in the lower surface of the deck corresponding to the insertion holes, The bolts are passed through the insertion holes from below and screwed into the inserts, thereby fixing the anchor plate to the underside of the deck. In the step of installing the deck, the existing reinforced concrete deck is replaced with the deck, and in the step of inserting the anchor members, the anchor members are attached and detached to the existing deck insertion holes, and new bridge accessories are installed. Joining method.

7. The bridge attachment includes a wall parapet; The step of installing the bridge attachment includes a step of adjusting the height of the wall parapet, The method includes a step of filling a filler material into the bridge accessory insertion hole and between the bridge accessory and the deck after the step of fixing the anchor member to the bridge accessory and the step of fixing the anchor member to the deck. The joining method according to claim 6.

8. Further comprising an expansion device provided at the end of the deck in the bridge axis direction, The step of inserting the anchor member is carried out before the step of installing the bridge attachment; The step of installing the bridge attachment includes a step of fixing the expansion device and the anchor member to each other, In the step of fixing the anchor member to the bridge attachment by the upper fixing member, the anchor member and the expansion device are filled with concrete to embed the anchor member and the expansion device in the concrete. The joining method according to claim 6.

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