JP4394703B2 - Expansion joint for road bridge and its construction method - Google Patents

Description

    The present invention relates to an expansion joint for a road bridge and a construction method thereof.

    As an expansion joint for a road bridge, a pair of corrugated plates arranged to bend and extend in the longitudinal direction of each joint at the joint of the road bridge so as to form a corrugated gap, and water leakage from the corrugated gap What is provided with the rubber-made sealing board which prevents this is generally known (refer patent document 1). In such an expansion joint, both sides of the seal plate are bonded to the corrugated plates on both sides by vulcanization adhesion. In addition, this seal plate is also bonded to the corrugated plate with an adhesive.

It is also known that both sides of the seal plate are fastened and fixed to the opposing inner surfaces of the corrugated vertical plate by a bolt via a press plate (see Patent Document 2).
Japanese Patent Publication No.57-25682 JP-A-6-41907

    However, in the case of the expansion joint described in Patent Document 1, even if the seal plate is vulcanized and bonded to a joint member such as the corrugated plate, the adhesive force decreases due to secular change. There is a concern that the plate may partially peel from the joint member to create a gap between the two, causing water leakage. This water leakage adversely affects concrete girders, steel girders, bridge shoes and the like.

    On the other hand, when the seal plate is coupled to the joint member using a presser plate and a bolt as in the expansion joint described in Patent Document 2, the problem of peeling of the seal plate due to secular change is solved. However, the gap between the joint members is reduced by the thickness of the presser plate, and the allowable expansion / contraction amount of the joint is reduced. Moreover, it is difficult to press the side part of the seal plate over the entire length to the inner surface of the joint member with an equal pressure, and there is a concern of water leakage.

    Then, this invention makes it a subject to improve the water leak prevention performance of the expansion joint for bridges.

    In the present invention, in order to solve such a problem, a seal plate is stretched over the top surfaces of the opposing joint members, and both side portions of the seal plate are turned to the back side of the joint members and fixed by a cover angle. did.

That is, the invention according to claim 1 is an expansion joint for a road bridge provided at a joint portion of the road bridge,
A pair of plate-like joint members that extend in the longitudinal direction of the seam portion and face each other with a gap allowing expansion and contraction of the road bridge;
A seal plate extending in the longitudinal direction of the seam portion;
A pair of cover angles extending in the longitudinal direction of the seam portion,
The sealing plate has a central portion has become a groove shape flexed so that Oite substantially V-shaped or substantially U-shaped in the Joint Gap, passed over the top surface of both coupling members, both sides part is provided by turning the said top face on the rear side of the two joint members,
The cover angle includes a vertical plate portion extending in a longitudinal direction of the joint portion, and a horizontal plate portion provided at an upper end of the vertical plate portion and extending in a longitudinal direction of the joint portion,
The horizontal plate portion of the cover angle covers a portion of the seal plate that is hung on the top surface of the joint member, and the vertical plate portion of the cover angle is overlapped from the outside on the side of the seal plate at the back of the joint member. And
Vertical plate portion is screwed from the back to the top Symbol joint member of the cover angle, the sides of the seal plate is held sandwiched between the vertical plate portion and the coupling member of the cover angle It is characterized by.

In such an expansion joint, since the seal plate is stretched over the top surfaces of both joint members and both side portions are turned to the back side of both joint members, there is water leakage between the seal plate and the joint member. There is no gap that can cause In this way, the portion of the seal plate that is hung on the top surface of the joint member is covered with the cover angle horizontal plate, so that the vehicle tire does not touch the seal plate, and damage to the seal plate is prevented. The In addition, since the vertical plate portion of the cover angle is screwed to the joint member, the side portion of the seal plate is sandwiched between the vertical plate portion of the cover angle and the joint member. Can be done at the construction site. That is, it is not necessary to attach the seal plate to the joint member in advance.

The invention according to claim 2 is the invention according to claim 1,
Each of the joint members extends linearly in the longitudinal direction of the seam portion,
A vertical plate portion of each of the pair of cover angles is screwed to each of the joint members.
The horizontal plate portions of both the cover angles are provided with a plurality of convex portions projecting toward each other at intervals in the longitudinal direction of the seam portion, and the respective convex portions are adjacent to the counterpart lateral plate portion. It is characterized by facing a relatively concave portion between the convex portions.

    That is, it is generally known that if a wave play is formed in the seam portion of the road bridge so as to be bent in a wave shape and extend in the longitudinal direction of the seam portion, the vehicle traveling performance is improved. Such a corrugated clearance can be formed by adopting a corrugated plate as the joint member. In this case, the vertical plate portion of the cover angle also needs to be corrugated.

    On the other hand, according to the invention according to claim 2, the corrugated clearance is formed by the horizontal plate portions of both cover angles, and it is necessary to corrugate the joint member and the vertical plate portion of the cover angle. This is advantageous for cost reduction.

The invention according to claim 3 is the invention according to claim 1,
Each of the joint members extends linearly in the longitudinal direction of the seam portion,
A vertical plate portion of each of the pair of cover angles is screwed to each of the joint members.
The horizontal plate portions of each of the cover angles extend from the vertical plate portions to the mating side of the vertical plate portions, and cover the portion of the seal plate that is hung on the joint member top surface. An outer projecting part projecting from the plate part to the back side,
The outer overhanging portion is formed in a wave shape in which convex portions projecting toward the back portion side and concave portions relatively recessed are provided alternately in the longitudinal direction of the joint portion.

    Therefore, the boundary between the expansion joint and the post-cast concrete placed on the back portion thereof is formed in a wave shape by the outer overhanging portion of the cover angle horizontal plate portion. For this reason, even if the surface of the post-cast concrete (road surface) is worn and a step is formed at the boundary with the horizontal plate portion, the boundary is wavy, so that the vehicle running performance is not greatly deteriorated. It is done.

According to a fourth aspect of the present invention, in any one of the first to third aspects,
Bolts project from the back of the joint member,
Holes through which the bolts are passed are formed in both side portions of the seal plate and the vertical plate portions of the cover angle,
A nut is applied to the bolt protruding from the vertical plate portion of the cover angle to the back portion, and the vertical plate portion is fastened to the joint member via a side portion of the seal plate.

    Accordingly, by passing the bolts of both joint members through the holes on both sides of the seal plate, the seal plate can be temporarily held on both joint members. If the cover angle is fitted to the bolt by the hole of the vertical plate portion in that state, the seal plate and the cover angle can be easily and reliably fixed to the joint member by the nut.

The invention according to claim 5 is a construction method of an expansion joint for a road bridge,
In the seam portion of the road bridge, a plurality of pairs of plate-like joint members each extending in the longitudinal direction of the seam portion and allowing the expansion and contraction of the road bridge to face each other are connected to each other. Arrange them in the longitudinal direction,
A seal plate extending continuously in the longitudinal direction of the joint portion over the plurality of sets of joint members, such that the center portion is disposed between the play portions and both side portions thereof are disposed on the back side of the joint member. Hang over the top surfaces of the joint members on both sides of the gap,
A cover angle provided with a horizontal plate portion at the upper end of a vertical plate portion extending in the longitudinal direction of the joint portion, and a portion where the horizontal plate portion is hung on the top surface of the joint member of the seal plate are covered. Provided so that the plate portion is located on the back of the side of the seal plate,
The vertical plate portion of the cover angle is screwed to the joint member from the back with the side portion of the seal plate interposed therebetween.

    Accordingly, since the seal plates are continuous over a plurality of sets of joint members in the longitudinal direction of the joint portion, there is no need to connect the seal plates in the longitudinal direction of the joint portion. Therefore, it is advantageous in reliably preventing water leakage at the road bridge joint.

As described above, according to the first aspect of the present invention, the seal plate is stretched over the top surfaces of the two joint members, both sides thereof are turned to the back side of the two joint members, and the vertical plate portion of the cover angle is connected to the joint member. The side part of the seal plate is sandwiched between the vertical plate part of the cover angle and the joint member by screwing to the cover plate, and the part hung on the top surface of the joint member of the seal plate is covered by the horizontal plate part of the cover angle. Therefore, there is no gap between the seal plate and the joint member that causes water leakage, water leakage at the road bridge joint is prevented, and the vehicle tire does not touch the seal plate. Damage to the plate is prevented, and the seal plate can be easily attached to the joint member at the construction site.

    According to the invention according to claim 2, since the corrugated play is formed in the road bridge joint portion by the horizontal plate portions of both cover angles, it is possible to obtain good vehicle running performance, and the joint member and the cover Since there is no need to corrugate the vertical plate portion of the angle, it is advantageous for cost reduction.

    According to the invention according to claim 3, since the corrugated outer overhanging portion is provided in the horizontal plate portion of the cover angle, the boundary between the expansion joint and the post-cast concrete to be placed on the back portion is the cover angle horizontal plate portion. Thus, even if a step is produced at the boundary due to wear of the surface (road surface) of the post-cast concrete, it is possible to avoid a significant deterioration in vehicle running performance.

    According to a fourth aspect of the present invention, a bolt is projected from the back surface of the joint member, and a hole through which the bolt is passed is formed in both side portions of the seal plate and the vertical plate portion of the cover angle. Since the vertical plate part of the cover angle is tightened to the joint member by applying the above, the seal plate can be temporarily held on the joint member by using the bolt, and the cover angle is fitted to the bolt and the nut is fitted. By simply screwing together, the seal plate and the cover angle can be easily and reliably fixed to the joint member.

    According to the invention which concerns on Claim 5, in the joint part of a road bridge, it arrange | positions so that several sets of a pair of plate-shaped joint member may be located in a line with a joint longitudinal direction, and this joint part of the said joint part is extended over this multiple set joint member. A seal plate extending continuously in the longitudinal direction is stretched over the top surfaces of the joint members on both sides of the gap so that the central portion is disposed between the gaps and the both side portions are disposed on the back side of the joint members. The cover angle is provided so that the horizontal plate portion covers a portion of the seal plate that is hung on the top surface of the joint member. The vertical plate portion of the cover angle is connected to the joint member from the outside of the side portion of the seal plate. Since it is screwed, there is no need to connect the seal plates in the longitudinal direction of the joint portion, which is advantageous in reliably preventing water leakage at the road bridge joint portion.

    Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

Embodiment 1
(Expansion joint and the structure of the road bridge joint where it is installed)
FIG. 1 shows a road bridge joint where an expansion joint 1 according to the present invention is installed. In the figure, 2 is a road bridge body (concrete slab or concrete girder), and 3 is pavement. The expansion joint 1 includes a pair of steel plate-like joint members 4, 4, a flexible seal plate 5 made of rubber or the like, and a pair of steel cover angles 6, 6. The expansion joint 1 is fixed to the road bridge main bodies 2 and 2 by placing post-cast concrete 10 in notched step portions 9 formed at the ends of the road bridge main body 2 on both sides thereof.

    The joint member 4 is constituted by a corrugated plate that is bent in a wave shape and extends in the longitudinal direction (road bridge width direction) of the road bridge joint portion, as schematically shown by a broken line in FIG. The pair of joint members 4 are disposed with their concave and convex surfaces facing each other so that a corrugated clearance 7 that allows expansion and contraction of the road bridge is formed. A trapezoidal bottom plate 8 is joined to the lower ends of the protrusions protruding to the mating side of each of the pair of joint members 4 and 4.

    An anchor 11 for fixing the joint member 4 to the road bridge body 2 is projected from the back surface of each joint member 4. Further, a bolt 12 is protruded from the upper back of each joint member 4 as a screw member for fixing the seal plate 5 and the cover angle 6 to the joint member 4. A plurality of anchors 11 and bolts 12 are provided at intervals in the longitudinal direction of the joint portion.

    In the road bridge joint, as shown in FIG. 2, a plurality of pairs of a pair of joint members 4, 4 are arranged in the longitudinal direction of the joint, and are arranged with their end faces abutting each other.

    The seal plate 5 extends in the longitudinal direction of the road bridge joint, spans the top surfaces of the joint members 4, 4, the central portion thereof is provided in the corrugated play 7, and the both side portions 5 a, 5 a are both It is provided on the back side of the joint members 4, 4. The central portion of the seal plate 5 is bent into a substantially V shape or a substantially U shape in the wave gap 7 and has a groove shape. As shown in FIG. 3, a hole 13 through which the bolt 12 on the back surface of the joint member 4 is passed is formed in both side portions 5a, 5a of the seal plate 5, and further, the lower portion of the side portion 5a does not interfere with the anchor 11. Thus, a notch 14 opened downward is formed. A plurality of holes 13 and notches 14 are formed at intervals in the longitudinal direction of the seam portion corresponding to the bolts 12 and the anchors 11.

    As shown in FIG. 2, the seal plate 5 continuously extends in the longitudinal direction over a plurality of sets of joint members 4, 4 aligned in the longitudinal direction of the joint portion. The seal plate 5 is preferably continuous over the entire length in the longitudinal direction of the joint portion of the road bridge. At the end of the seal plate 5, a bag path portion 15 is formed so that the groove at the center of the seal plate is a dead end.

    That is, FIG. 4 is a developed view of the end portion of the seal plate 5, by making the dotted lines 21 and 22 mountain folds and the solid lines 23, 24, 25 are valley folds, the triangular parts 26, 27 are aligned on the back, The triangular portions 28 and 29 are also aligned on the back, and the triangular portions 30 and 31 are aligned with the triangular portions 26 and 28 on the front. Thereby, the bag path part 15 shown in FIG. 5 is formed. The triangular portions 26, 27, and 30 and the triangular portions 28, 29, and 31 that are overlapped with each other are joined by stoppers 32 and 32.

    As shown in FIG. 3, the cover angle 6 has a lateral plate portion 36 projecting laterally from the upper end of the vertical plate portion 35, and, like the joint member 4, bends in a wave shape in the longitudinal direction of the road bridge joint portion. It extends. A hole 37 through which the bolt 12 on the back surface of the joint member 4 is passed is formed in the vertical plate portion 35, and a notch 38 that opens downward is formed in the lower portion of the vertical plate portion 35 so as not to interfere with the anchor 11. . A plurality of holes 37 and notches 38 are formed at intervals in the longitudinal direction of the seam portion corresponding to the bolts 12 and the anchors 11. The surface of the cover angle 6 is subjected to anti-slip processing and anti-corrosion processing.

    Then, the seal plate 5 is fitted into the bolt 12 of the joint member 4 through the hole 13, and the cover angle 6 is fitted into the bolt 12 through the hole 37 of the vertical plate portion 35, and the nut 39 is applied to the bolt 12. Thus, the seal plate 5 and the cover angle 6 can be fixed to the joint member 4. By tightening the nut 39, the side portion 5 a of the seal plate 5 is held between the joint member 4 and the vertical plate portion 35 of the cover angle 6. The horizontal plate portion 36 of the cover angle 6 is in a state of covering the portion hung on the joint member top surface of the seal plate 5 from above. In the present embodiment, the lateral plate portion 36 protrudes toward the corrugated gap 7 side from the joint member 4. The protrusion amount is preferably 3 mm or more and 15 mm or less, for example. Thus, a corrugated play is formed in the road bridge joint portion by the horizontal plate portions 36 of the cover angle 6 facing each other.

    As shown in FIG. 2, similarly to the joint member 4, the cover angle 6 is also arranged in such a manner that a plurality of cover angles 6 are arranged in the longitudinal direction of the joint portion, and end surfaces thereof are abutted with each other.

(Expansion joint construction method)
Notched step portions 9 and 9 that are lower than the road surface are formed at the ends of the road bridge main bodies 2 and 2. In the road bridge joint portion where the notched step portions 9 and 9 are formed, the pair of joint members 4 and 4 are arranged so that the plate surfaces face each other with the wave gap 7 therebetween. A plurality of pairs of such a pair of joint members 4 and 4 are arranged in the longitudinal direction of the joint, and the joint members 4 and 4 adjacent to each other in the longitudinal direction are in a state in which their end faces are abutted with each other. A concrete leakage prevention plate 41 is provided at the lower end of the back portion of the joint member 1.

    One side of the seal plate 5 is fitted to one bolt 12 of the opposing joint members 4 and 4 by the hole 13, and the opposite side of the seal plate 5 is similarly fitted to the bolt 12 of the other joint member 4. . Then, the central portion of the seal plate 5 is bent downward by the corrugated clearance 7 so that the seal plate 5 is stretched over the top surfaces of the joint members 4 and 4 on both sides.

    The cover angle 6 is fitted to the bolt 12 of each joint member 4, the vertical plate portion 35 of the cover angle 6 overlaps the side portion 5 a of the seal plate 5, and the portion hung on the top surface of the joint member 4 of the seal plate 5 is lateral. The plate portion 36 is covered. Then, by applying a nut 39 to each bolt 12 of the joint member 4, the cover angle 6 is fastened to the joint member 4 from the back with the side portion 5 a of the seal plate 5 interposed therebetween, and the seal plate 5 is attached to the joint member 4. Hold. After that, concrete is cast to the notch step portions 9 and 9 on both sides of the expansion joint 1 to the road surface height.

(Function and effect)
Therefore, in the road bridge joint portion where the expansion joint 1 is constructed, the seal plate 5 is stretched over the top surfaces of the opposing joint members 4 and 4, and both side portions 5 a and 5 a are the back surfaces of the joint members 4 and 4. Since it is rotated to the side, there is no gap between the seal plate 5 and the joint member 4 that causes water leakage. In addition, since the seal plate 5 is continuous over the plurality of sets of joint members 4 in the longitudinal direction of the joint portion, there is no connection between the seal plates, which is advantageous in preventing water leakage.

    Moreover, since the part hung on the top surface of the joint member 4 of the seal plate 5 is covered by the horizontal plate portion 36 of the cover angle 6, the tire of the vehicle does not touch the seal plate. Therefore, damage to the seal plate 5 is prevented. In particular, since the tip of the lateral plate portion 36 is protruded to the corrugated clearance 7 side from the joint member 4, it is possible to reliably prevent the tire from touching the seal plate, and at the time of snowfall, pressure snow (consolidated snow) ), The wheel load acting on the central portion of the seal plate 5 (the portion existing in the corrugated clearance 7) is also reduced, which is advantageous for improving the durability of the seal plate.

    In the construction method, the seal plate 5 can be temporarily held on the joint members 4 and 4 on both sides by passing the bolts 12 of the joint member 4 through the holes 13 on both sides 5a and 5a of the seal plate 5. it can. Therefore, even if the seal plate 5 is a long continuous member extending over a plurality of sets of joint members 4, it is easy to attach the seal plate 5 to the joint member 4. Moreover, the temporary holding facilitates the operation of fitting the cover angle 6 into the bolt 12 and screwing the nut 39. Then, the sealing plate 5 and the cover angle 6 can be easily and reliably fixed to the joint member 4 by tightening the nut 39 to the bolt 12.

    When constructing the expansion joint 1 at the joint between the road bridge and the abutment, a notch step is formed at the end of the road bridge body 2 and the abutment, and the same as in the case of the joint between the above-mentioned road bridges. You can do this.

    Further, the joint member 4 is constituted by the corrugated plate described above, and adopts a flat plate (vertical plate) that extends linearly in the longitudinal direction of the joint portion so as to form a gap extending linearly over the entire length of the joint portion. May be.

    Further, the joint member 4 may be provided with a female screw, and the cover angle 6 may be fastened to the joint member 4 with the male screw with the seal plate 5 interposed therebetween.

Embodiment 2
This embodiment is shown in FIG. 6 and FIG. As the joint member 4, the corrugated plate is used in the first embodiment, but in this embodiment, a flat plate that extends linearly in the longitudinal direction of the joint portion is used, and the vertical plate portion 35 of the cover angle 6 has a similar flat plate shape. The corrugated play 45 is formed by the horizontal plate portion 36. That is, a plurality of convex portions 46 projecting toward each other are provided on the horizontal plate portion 36 of each of the cover angles 6 at intervals in the joint portion longitudinal direction. Thus, the corrugated play 45 is formed such that the convex portions 46 of the both lateral plate portions 36 face the portions that are relatively concave between adjacent convex portions of the counterpart lateral plate portion 36. ing. Other configurations are basically the same as those of the first embodiment.

    Therefore, according to the present embodiment, since the corrugated clearance 45 is formed by the horizontal plate portion 36 while the vertical plate portion 35 of the joint member 4 and the cover angle 6 is formed in a flat plate shape, while reducing the cost of the expansion joint, Good vehicle running performance can be obtained.

Embodiment 3
This embodiment is shown in FIG. 8 and FIG. 9 and is characterized in that an inner overhanging portion 36a and an outer overhanging portion 36b are provided on the horizontal plate portion 36 of the cover angle 6, and the others are the same as in the second embodiment. .

    That is, the horizontal plate portion 36 of each of the cover angles 6 has an inner overhang portion 36a that protrudes from the vertical plate portion 35 toward the other side and covers a portion of the seal plate 5 that is hung on the top surface of the joint member 4; Outer projecting portions 36b projecting from the vertical plate portions 35 to the back side are provided.

    As in the second embodiment, the inner overhanging portion 36a is provided with a plurality of convex portions 46 protruding toward the mating lateral plate portion 36 at intervals in the joint portion longitudinal direction. Thus, the corrugated clearance 45 is formed so that the convex portions 46 of the inner projecting portions 36a on both sides are opposed to the relatively concave portions between the adjacent convex portions on the opposite side. On the other hand, the outer projecting portion 36b is formed in a wave shape in which convex portions 47 projecting to the back side of the vertical plate portion 35 and concave portions that are relatively recessed are provided alternately in the longitudinal direction of the joint portion.

    Therefore, according to this embodiment, the boundary between the expansion joint and the post-cast concrete 10 is formed in a wave shape by the outer overhanging portion 36 b of the horizontal plate portion 36 of the cover angle 6. For this reason, even if the surface (road surface) of the post-cast concrete 10 is worn and a step is generated at the boundary with the horizontal plate portion 36, the vehicle travelability is greatly deteriorated because the boundary is wavy. Can be avoided.

    In addition, about the inner side overhang | projection part 36a of the horizontal plate part 36, the front end surface may not be formed in uneven | corrugated shape, but you may make it extend linearly in the joint part longitudinal direction.

It is sectional drawing of the road bridge joint part which installed the expansion joint which concerns on Embodiment 1 of this invention. It is a top view of the expansion joint. It is sectional drawing which shows the state which attaches a seal board and a cover angle to the joint member of the expansion joint. It is an expansion part figure of a seal board. It is a perspective view which shows the edge part structure of a sealing plate. It is sectional drawing of the road bridge joint part which installed the expansion joint which concerns on Embodiment 2 of this invention. It is a top view of the road bridge joint part. It is sectional drawing of the road bridge joint part which installed the expansion joint which concerns on Embodiment 3 of this invention. It is a top view of the road bridge joint part.

DESCRIPTION OF SYMBOLS 1 Expansion joint 2 Road bridge body 3 Pavement 4 Joint member 5 Seal plate 5a Side part 6 Cover angle 7 Spacing 12 Bolt (screw member)
13 hole 35 vertical plate portion 36 horizontal plate portion 36a inner overhang portion 36b outer overhang portion 37 hole 39 nut (screw member)
45 Wave play 46 Projection 47 Projection

Claims (5)

An expansion joint for a road bridge provided at the joint of a road bridge,
A pair of plate-like joint members that extend in the longitudinal direction of the seam portion and face each other with a gap allowing expansion and contraction of the road bridge;
A seal plate extending in the longitudinal direction of the seam portion;
A pair of cover angles extending in the longitudinal direction of the seam portion,
The sealing plate has a central portion has become a groove shape flexed so that Oite substantially V-shaped or substantially U-shaped in the Joint Gap, passed over the top surface of both coupling members, both sides part is provided by turning the said top face on the rear side of the two joint members,
The cover angle includes a vertical plate portion extending in a longitudinal direction of the joint portion, and a horizontal plate portion provided at an upper end of the vertical plate portion and extending in a longitudinal direction of the joint portion,
The horizontal plate portion of the cover angle covers a portion of the seal plate that is hung on the top surface of the joint member, and the vertical plate portion of the cover angle is overlapped from the outside on the side of the seal plate at the back of the joint member. And
Vertical plate portion is screwed from the back to the top Symbol joint member of the cover angle, the sides of the seal plate is held sandwiched between the vertical plate portion and the coupling member of the cover angle An expansion joint for road bridges. In claim 1,
Each of the joint members extends linearly in the longitudinal direction of the seam portion,
A vertical plate portion of each of the pair of cover angles is screwed to each of the joint members.
The horizontal plate portions of both the cover angles are provided with a plurality of convex portions projecting toward each other at intervals in the longitudinal direction of the seam portion, and the respective convex portions are adjacent to the counterpart lateral plate portion. An expansion joint for a road bridge, characterized by facing a relatively concave portion between the convex portions. In claim 1,
Each of the joint members extends linearly in the longitudinal direction of the seam portion,
A vertical plate portion of each of the pair of cover angles is screwed to each of the joint members.
The horizontal plate portions of each of the cover angles extend from the vertical plate portions to the mating side of the vertical plate portions, and cover the portion of the seal plate that is hung on the joint member top surface. An outer projecting part projecting from the plate part to the back side,
The outer overhanging portion is formed in a wave shape in which convex portions projecting to the back portion side and relatively concave concave portions are alternately provided in the longitudinal direction of the joint portion. Expansion joint. In any one of Claim 1 thru | or 3,
Bolts project from the back of the joint member,
Holes through which the bolts are passed are formed in both side portions of the seal plate and the vertical plate portions of the cover angle,
A nut is applied to the bolt protruding from the vertical plate portion of the cover angle to the back thereof, and the vertical plate portion is fastened to the joint member via the side portion of the seal plate. Expansion joints. In the seam portion of the road bridge, a plurality of pairs of plate-like joint members each extending in the longitudinal direction of the seam portion and allowing the expansion and contraction of the road bridge to face each other are connected to each other. Arrange them in the longitudinal direction,
The seal plate continuously extending in the longitudinal direction of the joint portion over the plurality of sets of joint members is formed into a groove shape which is bent so that the central portion is substantially V-shaped or substantially U-shaped. disposed joint Gap passes so both sides are arranged toward the back side of the two joint members from the top surfaces of both joint members, over the top surface of the joint Gap either side of the joint member,
A cover angle in which a horizontal plate portion extending in the longitudinal direction of the joint portion is provided at the upper end of a vertical plate portion extending in the longitudinal direction of the joint portion is hung on the top surface of the joint member of the seal plate. The vertical plate portion is provided on the joint member so as to overlap the side portion of the seal plate from the outside at the back portion,
The vertical plate portion of the cover angle, by screwing from the back to the top Symbol joint member, is, the side of the seal plate held sandwiched between the vertical plate portion and the coupling member of the cover angle The construction method of the expansion joint for road bridges characterized by this.

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