KR100493447B1 - Expansion joint for a bridge - Google Patents

Abstract

The present invention relates to a bridge expansion joint device having a joint portion so as to continuously connect the sidewalk and the driveway, the bridge expansion joint device 300 of the present invention, the sidewalk monocell joint 310 is located in the sidewalk In addition, the driveway monocell joint 320 is located in the driveway, and sidewall monocell joint 330 is disposed on the side wall of the guideway and the driveway monocell joint continuously connected. The guide and driveway monocell joint is configured in the same manner as a conventional monocell joint, and the sidewall monocell joint has a first cutout 334 cut from the lower surface toward the upper surface at a portion where the driveway and the sidewall wall contact each other, The second cutout portion 337 cut from the lower surface toward the upper surface and the first cutout portion are bent and fixed in the upper surface direction according to the inclination angle of the roadway and the sidewall of the first cutout portion. And first and second reinforcement brackets 335 and 338 that are bent and fixed in a lower surface direction according to the inclination angle of the side wall and the sidewalk. The present invention has the effect of ensuring the stability of the bridge by preventing the inflow of rainwater and the like by continuously connecting the sidewalk and the driveway.

Description

Expansion joint for a bridge

The present invention relates to an expansion joint device for a bridge, and more particularly, to an expansion joint device for a bridge having a joint portion so as to continuously connect the sidewalk and the driveway.

The bridge structure is composed of steel or concrete with a long shape in the longitudinal direction, so it is unable to cope with the tremendous stress caused by the deformation of the bridge. The deformation of the bridge is due to temperature, creep, shrinkage, and point rotation due to vehicle loads. These factors are mostly related to the external environment such as the material, geographic characteristics, and climate of the materials that make up the bridge. While steel and concrete are used as materials for bridge structures, the bridge deck can be cut to an appropriate length, and a non-slip attachment between the superstructure and the substructure can be used to absorb such stresses. none. In addition, there is a discontinuity in the bridge deck to accommodate such a sliding, which is a major obstacle to the main function of the bridge, the running of the vehicle. These discontinuities are spreading as a problem about the vehicle's runability or water resistance, and use expansion joints to minimize such problems.

Thus, expansion joints are used to accommodate the movement and rotation of the upper part of the bridge due to temperature expansion, creep, dry shrinkage, displacement due to live loads, or unexpected displacements such as point settlements or earthquakes. It is a device that secures the reliability and further promotes the functional and structural stability of the bridge.

These expansion joints can be categorized into a self-supporting butt-bearing type and a load-supporting (or bearing) type. Currently, most bridges are supported except for small bridges. .

Figure 1 shows the configuration of the butt-type monocell joint expansion joint device. As shown in FIG. 1, the monocell joint type expansion joint device 100 according to the related art has a “V” shaped groove 111 and a first elastic member having insertion grooves 112 formed on both bottom surfaces thereof, respectively. 110 and a pair of support side plates 120 inserted into the insertion grooves 112 and supported by each other by compression bolts and nuts (not shown) so as to support the first elastic member 110, A second elastic member 130 inserted into the lower inner side of the pair of support side plates 120 and having a gentle "V" -shaped groove 131 and inserted into an inner surface of the pair of support side plates 120. The sound absorbing material 140 and a plurality of anchor bars 150 or the like welded or screwed with a predetermined distance on the outer surface of the pair of support side plates 120 and the like.

The first and second elastic members 110 and 130 have “V” shaped grooves 111 and 131, respectively, to smoothly accommodate the movement and rotation of the upper portion of the bridge caused by driving of the vehicle. In addition, the first and second elastic members 110 and 130 are made of synthetic rubber and the like for smooth stretching.

The monocell joint type expansion joint device 100 according to the related art configured as described above is installed and used in a bridge as shown in FIG. 2. FIG. 2 is an installation sectional view showing a state in which the monocell joint type expansion joint shown in FIG. 1 is installed in a bridge.

As shown in Figure 2, the monocell joint type expansion joint 100 is disposed on the joint portion of the upper plate concrete (C) of the bridge spaced apart from each other, welding the anchor bar 250 to the reinforcement (S), etc. And, by placing the anchor bar 250, the installation portion is connected to each other the top plate of the bridge.

Figure 3 shows the configuration of the supportive joint type expansion joint device. As shown in FIG. 3, the NV joint type expansion joint 200 according to the related art has two “V” shaped grooves 211 formed on the surface at regular intervals in the width direction and inserted grooves on both bottom surfaces thereof. 2 and 2, respectively, an elastic member 210 and a pair of supporting side plates 220 respectively inserted into the insertion grooves 212 and surrounding the outer surface of the elastic member 210, and the pair of support members. The outer surface of the side plate 220 is composed of a plurality of anchor bar 230 and the like welded or screwed at a predetermined interval.

The stretchable member 210 has a flat plate 213 therein, and a groove 214 is formed in the lower center thereof in the longitudinal direction thereof. In addition, the expansion and contraction member 210 has a "V" -shaped groove 211, in order to be able to smoothly accommodate the movement and rotation of the upper portion of the bridge due to the running of the vehicle. In addition, the elastic member 210 is composed of synthetic rubber and the like for smooth stretching.

The NV joint type expansion joint device 200 according to the related art configured as described above is installed and used in a bridge as shown in FIG. 4. 4 is an installation sectional view showing a state in which the NV joint type expansion joint shown in FIG. 3 is installed in a bridge.

As shown in FIG. 4, the NB joint expansion and contraction device 200 is disposed in the joint portion of the upper concrete plate C of the bridges spaced apart from each other, and the sound absorbing material 240 is disposed in the groove 214. And, welding the anchor bar 230 to the reinforcement (S) or the like, by connecting the upper plate of the bridge by placing the anchor bar 230 installation portion concrete.

In order to install the expansion joint devices 100 and 200 according to the related art, which are configured as described above, in the roadway and the sidewalk, the construction is cut and connected to the size of the roadway and the sidewalk, respectively, and then the connection part is sealed and finished. It was. However, in the case of such a finish treatment, a phenomenon occurs in which the sealed portion is opened by minute vibrations or impacts and a gap is generated. As a result, rainwater flows through the gaps, and the reinforcing bars are corroded and aged, thereby adversely affecting the bridge.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, to provide an expansion joint device for a bridge to secure the stability of the bridge by continuously connecting the sidewalk and the driveway having a joint portion. There is a purpose.

Bridge expansion joint device of the present invention for achieving the above object, India side expansion joint means located in the sidewalk, driveway expansion joint means located in the driveway, and sidewalk side wall while connecting the sidewalk and driveway expansion joint means continuously It includes a side wall expansion joint means located in. The guide and driveway expansion joint means a plurality of expansion and contraction members that can be stretched according to the behavior of the bridge, the support side plate consisting of a steel plate to support the elastic member, and a plurality of coupled to the outer surface of the support side plate at regular intervals An anchor bar, wherein the side wall expansion joint means is composed of an elastic member that can be expanded and contracted according to the behavior of the support plate and the bridge, the first incision cut in the lower surface toward the upper surface in the contact portion between the driveway and the side wall, A second incision portion cut from the lower surface toward the upper surface at a portion where the side wall is in contact with the side wall; and the first incision portion is bent in the upper surface direction according to the inclination angle of the roadway and the side wall to reinforce and fix the second incision portion. Regarding the side wall and the inclination angle of the side wall is characterized in that it comprises a reinforcing bracket which is bent and fixed in the lower direction.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the expansion joint device for a bridge according to the present invention will be described in detail.

Figure 5 is a side view showing the configuration of the monocell joint expansion joint device used in the bridge according to an embodiment of the present invention, Figure 6 is a mono constituting the monocell joint expansion joint shown in Figure 5 7A and 7B are cross-sectional views cut along the line AA and the line BB of the monocell joint shown in FIG. 6, respectively.

As shown in FIG. 5, the monocell joint type expansion joint device 300 according to the present invention includes an indo monocell joint 310 located in a sidewalk, a driveway monocell joint 320 located in a driveway, and these It is composed of a side wall monocell joint 330 which is continuously connected to the joint (310, 320) and located on the side wall.

The guide and driveway monocell joints 310 and 320 are configured in the same manner as the monocell joint type expansion joint device 100 configured as shown in FIG. 1. That is, the guide and driveway monocell joints 310 and 320 have a “V” shaped groove 321a and a first elastic member 321 having insertion grooves 321b formed on both lower surfaces thereof, respectively, and the insertion grooves 321b. A pair of support side plates 322 inserted into and respectively supported by a compression bolt and a nut (not shown) so as to support the first elastic member 321, and the pair of support side plates 322. A second expansion and contraction member 323 inserted into the lower inner side of the lower portion and having a gentle "V" -shaped groove 323a, a sound absorbing material 324 inserted into an inner surface of the pair of support side plates 322, and the pair It consists of a plurality of anchor bar 325 or the like welded or screwed to a certain interval on the outer surface of the support side plate 322 (see Fig. 7b).

As shown in Figure 6 and 7b, the pair of support side plate 322 is composed of a steel plate having a certain strength, the first and second elastic members 321, 323 are synthetic rubber for smooth stretching And the like.

The side wall monocell joint 330 is a sidewalk and driveway mono, except that the pair of supporting side plates are made of the same kind of synthetic rubber as the first and second elastic members 331 and 333 instead of the steel plate. It is configured in the same manner as the cell joints 310 and 320 (see FIGS. 6 and 7A).

FIG. 8 is a side view illustrating a state in which a portion of the monocell joint illustrated in FIG. 6 is in contact with a roadway and a side wall of the lead. As shown in FIG. 8, the sidewall monocell joint 330 of the present invention configured as described above has a first cutout 334 partially cut in a portion where the driveway and the sidewall contact each other. The first cutout 334 is cut from the lower surface of the sidewall monocell joint 330 toward the upper surface, and has a shape in which only a portion of the first elastic member 331 is cut off. That is, as shown in FIG. 9, the first cutout 334 is cut in a state in which the thickness t of the first elastic member 331 is maintained at least 10 mm or more. Since the first cutout 334 forms a joint portion that can be folded in the upper surface direction of the sidewall monocell joint 330, the first cutout 334 may be formed by cutting at a narrow angle along the width direction of the sidewall monocell joint 330. . FIG. 9 is a cross-sectional view taken along the line C-C of the monocell joint shown in FIG. 8.

FIG. 10 is a side view illustrating a state in which the monocell joint illustrated in FIG. 8 is bent by 90 °. As illustrated in FIG. 10, the sidewall monocell joint 330 having the first cutout 334 may be folded at a desired angle in an upper direction thereof. Although FIG. 10 shows the side wall monocell joint 330 bent at 90 °, the angle may be adjusted according to the inclination angle of the roadway and the side wall of the delivery.

FIG. 11 is a side view illustrating a state in which a bent portion of the monocell joint illustrated in FIG. 10 is reinforced. As shown in FIG. 10, when the sidewall monocell joint 330 is bent at a desired angle through the first cutout 334, the bent joint part is reinforced with the first reinforcing bracket 335 as shown in FIG. 11. The first reinforcing bracket 335 may have a different shape according to the bending angle. When the first reinforcing bracket 335 is bent at 90 ° as shown in FIG. At this time, both ends of the first reinforcing bracket 335 may be fitted and fixed to the anchor bar 325 of the driveway monocell joint 320 and the fixing bar 336 to be formed on the side wall monocell joint 330. Fixing grooves 335a are formed, respectively.

FIG. 12 is a side view illustrating a state in which a portion of a sidewall contacting the sidewall of the monocell joint illustrated in FIG. 11 is partially cut away. As shown in FIG. 12, the sidewall monocell joint 330 of the present invention configured as described above has a second cutout portion 337 partially cut at a portion where the sidewall and the sidewall contact each other. The second cutout 337 is cut in the same manner as the first cutout 334 except that the cut angle is larger than that of the first cutout 334. That is, the second cutout 337 is cut in a state in which the thickness t of the first elastic member 331 is maintained at least 10 mm or more, as shown in FIG. 13. Since the second cutout 337 forms a joint portion that can be folded in the lower surface direction of the sidewall monocell joint 330, the second cutout 337 is 90 °, more than or less along the width direction of the sidewall monocell joint 330. What is necessary is just to cut and form at the angle of. FIG. 13 is a cross-sectional view taken along the line D-D of the monocell joint shown in FIG. 12.

FIG. 14 is a side view illustrating a state in which the monocell joint illustrated in FIG. 12 is bent by 90 °. As illustrated in FIG. 14, the sidewall monocell joint 330 having the second cutout 337 may be folded at a desired angle in a lower surface direction thereof. Although FIG. 14 shows the side wall monocell joint 330 bent 90 degrees, the angle may be adjusted according to the inclination angle of the roadway and the side wall of the guide.

As shown in FIG. 14, when the sidewall monocell joint 330 is bent at a desired angle through the second cutout 337, the bent joint portion as shown in FIG. 5 is reinforced with the second reinforcing bracket 338. The second reinforcement bracket 337 may have a different shape according to the bending angle. When the second reinforcing bracket 337 is bent at 90 ° as shown in FIG. At this time, both ends of the second reinforcing bracket 337 may be fixed to the anchor bar 325 of the delivery monocell joint 310 and the fixing bar 336 to be formed on the side wall monocell joint 330. Fixing grooves 338a are formed, respectively.

In the above embodiment, the first and second cutouts 334 and 337 are reinforced by using the respective reinforcing brackets 335 and 338. However, the first and second cutouts 334 and 337 may be reinforced by using one reinforcing bracket bent to fit the shape. It may be.

The monocell joint type expansion joint device 300 according to the present invention configured as described above is used continuously installed on the roadway of a bridge, sidewalks, and sidewalls connecting them to each other, as shown in FIG. 15. FIG. 15 is a schematic side view illustrating a state in which the monocell joint type expansion joint shown in FIG. 5 is installed in a bridge.

FIG. 16 is a side view illustrating a configuration relationship of an NV joint expansion joint device used in a bridge according to another embodiment of the present invention, and FIG. 17 is a view of an ENJ joint forming the ENV joint expansion joint device shown in FIG. 16. 18A and 18B are cross-sectional views taken along the line A'-A 'and the line B'-B', respectively.

As shown in FIG. 16, the NV joint type expansion joint device 400 according to the present invention includes an India NV joint 410 located in a sidewalk, a driveway ENV joint 420 located in a driveway, and these joints 410. , 420 is continuously connected to the side wall envy joint 430 located on the side wall of the delivery.

The guide and driveway NV joints 410 and 420 are configured in the same manner as the NV joint type expansion joint device 200 configured as shown in FIG. 3. That is, the delivery and driveway joint joints 410 and 420 have two “V” shaped grooves 421a formed at regular intervals in the width direction, and the elastic members 421 having insertion grooves 421b formed on both lower surfaces thereof, respectively. And a pair of supporting side plates 422 respectively inserted into the insertion grooves 421b and surrounding the outer surface of the elastic member 421, and having a predetermined interval on the outer surfaces of the pair of supporting side plates 422, respectively. A plurality of anchor bars 423 or the like that are welded or screwed together (see FIG. 18B).

The elastic member 421 has a flat plate 421c therein, and a groove 421d is formed in the lower center thereof in the longitudinal direction thereof.

As shown in FIG. 17 and FIG. 18B, the elastic member 421 is made of synthetic rubber and the like for smooth expansion and contraction, and the pair of support side plates 422 are made of steel plates having a certain strength.

In addition, the side wall enclosure joint 430 is a pair of support side plate is made of a synthetic rubber and the like of the same type as the elastic member 431 instead of the steel plate, except that the flat plate is not inserted into the elastic member 431. Is configured in the same way as the delivery and driveway enclosure joints 410 and 420 (see FIGS. 17 and 18A).

FIG. 19 is a side view illustrating a state in which a portion of the NV joint illustrated in FIG. 17 is in contact with the sidewalk and the side wall of the guideway. As shown in FIG. 19, the side wall enclosure joint 430 of the present invention configured as described above has a first cutout 433 partially cut at a portion where the driveway and the side wall are in contact with each other. The first cutout 433 is a cut from the lower surface of the side wall envy joint 430 toward the upper surface, so that only the upper portion of the elastic member 431 is cut. That is, as shown in FIG. 20, the first cutout 433 is cut in a state in which the thickness t of the elastic member 431 is maintained at least 10 mm or more. Since the first cutout 433 forms a joint portion that can be folded in the upper surface direction of the sidewall envy joint 430, the first cutout 433 may be formed by cutting at a narrow angle along the width direction of the sidewall envy joint 430. 20 is a cross-sectional view taken along the line C′-C ′ of the NV joint illustrated in FIG. 19.

FIG. 21 is a side view illustrating a state in which a portion of the side wall and the side in contact with the side wall is partially cut in a state where the NV joint shown in FIG. 19 is bent at 90 °. As illustrated in FIG. 21, the sidewall NV joint 430 having the first cutout 433 may be folded at a desired angle in an upper direction thereof. Although FIG. 21 is a state where the side wall envy joint 430 is bent by 90 °, the angle may be adjusted according to the inclination angle of the roadway and the side wall of the guide.

In addition, as shown in FIG. 21, the side wall enclosure joint 430 of the present invention has a second cutout portion 434 partially cut into a portion where the sidewall side and the sidewall contact each other. The second cutout 434 is cut in the same manner as the first cutout 433 except that the cut angle is larger than that of the first cutout 433. That is, as shown in FIG. 22, the second cutout 434 is cut in a state where the thickness t of the elastic member 431 is maintained at least 10 mm or more. Since the second cutout 434 forms a joint portion that can be folded in the direction of the lower surface of the sidewall enveloping joint 430, an angle of 90 °, or more or less along the width direction of the sidewall enveloping joint 430. What is necessary is just to cut and form. FIG. 22 is a cross-sectional view taken along the line D′-D ′ of the NV joint illustrated in FIG. 21.

FIG. 23 is a side view illustrating a state in which the NV joint shown in FIG. 22 is bent by 90 °. As shown in FIG. 23, the sidewall NV joint 430 having the second cutout 434 may be folded at a desired angle in a lower surface direction thereof. Although FIG. 23 is a state where the side wall envy joint 430 is bent by 90 degrees, the angle may be adjusted according to the inclination angle of the roadway and the side wall of the guide.

As shown in FIG. 23, when the sidewall envy joint 430 is bent at a desired angle through the second cutout 434, the bent joint part is reinforced with the reinforcing bracket 435 as shown in FIG. 16. The reinforcing bracket 435 may be different in shape depending on the angle to be bent. If the reinforcing bracket 435 is bent at 90 ° as shown in FIG. At this time, the reinforcing bracket 435 is welded to the respective joint joints 410, 420, 430, or fixed by bolts or screws.

In addition, the reinforcing bracket 435 of the present invention may be reinforced with each member as in the above-described embodiment without reinforcing the joint portions of two places as one member as described above.

Envelope joint expansion joint 400 of the present invention configured as described above is used to be installed continuously in the roadway of the bridge, sidewalks and sidewalls connecting them as shown in FIG. 24 is a schematic side view showing a state in which the NV joint type expansion joint shown in FIG. 16 is installed in a bridge.

25 and 26 are side views showing the configuration of the NMB joint type expansion joint device used in the bridge according to another embodiment of the present invention. As shown in Figure 25, the NV joint type expansion joint device of the present invention can adjust the angle of the bent portion in accordance with the conditions of the road side. In addition, as shown in Figure 26, the NV joint type expansion joint device of the present invention may be configured to be free to adjust the angle using a flexible reinforcement bracket.

As described in detail above, the expansion joint device for bridges of the present invention has joint portions without cutting each other according to the size of the roadway and sidewalks as in the prior art, thereby preventing the inflow of rainwater and the like by continuously connecting the sidewalks and the roadway. It is effective to secure stability.

The technical details of the expansion joint device for a bridge of the present invention has been described with the accompanying drawings, but this is only illustrative of the preferred embodiment of the present invention and not intended to limit the present invention.

In addition, it is obvious that any person skilled in the art can make various modifications and imitations within the scope of the appended claims without departing from the scope of the technical idea of the present invention.

1 is a cross-sectional view showing the configuration of the monocell joint type expansion joint according to the prior art,

Figure 2 is an installation cross-sectional view showing a state in which the monocell joint type expansion joint shown in Figure 1 is installed on the bridge,

3 is a cross-sectional view showing the configuration of the joint joint type expansion joint according to the prior art,

4 is an installation sectional view showing a state in which the NV joint type expansion joint shown in FIG. 3 is installed in a bridge;

5 is a side view showing the configuration of the mono-cell joint type expansion joint device used in the bridge according to an embodiment of the present invention,

6 is a side view showing the material relationship of the monocell joint constituting the monocell joint type expansion joint shown in FIG.

7A and 7B are cross-sectional views cut along the lines A-A and B-B of the monocell joint shown in FIG. 6, respectively.

FIG. 8 is a side view illustrating a state in which a portion of the monocell joint illustrated in FIG. 6 is in contact with a roadway and a side wall of the sidewall;

9 is a cross-sectional view taken along the line C-C of the monocell joint shown in FIG. 8,

FIG. 10 is a side view illustrating a state in which the monocell joint illustrated in FIG. 8 is bent at 90 °,

11 is a side view illustrating a state in which a bent portion of the monocell joint illustrated in FIG. 10 is reinforced;

FIG. 12 is a side view illustrating a state in which a portion of a sidewall contacting the sidewall of the monocell joint illustrated in FIG. 11 is partially cut away; FIG.

13 is a cross-sectional view taken along the line D-D of the monocell joint shown in FIG. 12,

FIG. 14 is a side view illustrating a state in which the monocell joint illustrated in FIG. 12 is bent by 90 °,

15 is a schematic side view showing a state in which the monocell joint type expansion joint shown in FIG. 5 is installed in a bridge;

FIG. 16 is a side view illustrating a configuration relationship of an NV joint type expansion joint device used in a bridge according to another embodiment of the present invention.

FIG. 17 is a side view showing the material relationship of an NV joint constituting the NV joint type expansion joint shown in FIG. 16;

18A and 18B are cross-sectional views cut along the line A'-A 'and the line B'-B', respectively, shown in FIG. 17;

FIG. 19 is a side view illustrating a state in which a portion of the NV joint illustrated in FIG. 17 is in contact with the sidewalk and the side wall of the guideway;

20 is a cross-sectional view taken along the line C′-C ′ of the NV joint illustrated in FIG. 19,

FIG. 21 is a side view showing a state in which a part of the side wall and sidewalks that are in contact with the guide joint in FIG. 19 is bent at 90 °;

FIG. 22 is a cross-sectional view taken along the line D′-D ′ of the NV joint illustrated in FIG. 21;

FIG. 23 is a side view illustrating a state in which the NV joint shown in FIG. 22 is bent by 90 °,

24 is a schematic side view illustrating a state where the NV joint type expansion joint shown in FIG. 16 is installed in a bridge;

25 and 26 are side views showing the configuration of the NV joint type expansion joint device used in the bridge according to another embodiment of the present invention.

  ♠ Explanation of symbols on the main parts of the drawing ♠

300: expansion joint 310: India monocell joint

320: driveway monocell joint 321, 323, 331, 333: elastic member

322 support side plate 324 sound absorbing material

325: anchor bar 330: side wall monocell joint

334, 337: Incision 335, 338: Reinforcement bracket

Claims (4)

Extension joint for bridge including a flexible member that can be stretched according to the behavior of the bridge, a support side plate made of a steel plate to support the stretchable member, and a plurality of anchor bars coupled to the outer surface of the support side plate at regular intervals. In the apparatus, And a sidewall expansion joint means located on a side wall of the sidewalk and continuously connecting the sidewalk expansion joint means located in a sidewalk, a driveway expansion joint means located in a driveway, and the sidewalk and driveway expansion joint means, The guide and driveway expansion joint means a plurality of expansion and contraction members that can be stretched according to the behavior of the bridge, the support side plate consisting of a steel plate to support the elastic member, and a plurality of coupled to the outer surface of the support side plate at regular intervals Including an anchor bar, The side wall expansion joint means is composed of an elastic member that can be expanded and contracted according to the behavior of the support side plate and the bridge, the first incision cut in the lower surface toward the upper surface in the area where the driveway and the side wall contact, the side wall and the side The second incision portion cut from the lower surface toward the upper surface at the contact portion and the first incision portion are bent in the upper surface direction according to the inclination angle of the roadway and the guiding side wall to be reinforced and fixed and the guiding side wall and the guiding portion for the second incision portion. The expansion joint device for a bridge, characterized in that it comprises a reinforcement bracket for reinforcement fixing by bending in the lower direction according to the inclination angle of the. The expansion joint device for a bridge according to claim 1, wherein the reinforcing bracket is separated to reinforce and fix the first and second cutouts, respectively. According to claim 1, wherein the reinforcing bracket is an expansion joint device for a bridge, characterized in that formed integrally to reinforce and fix the first and second incision at one time. The expansion joint device for a bridge according to any one of claims 1 to 3, wherein the first and second cutouts are cut in a state in which the thickness of the stretchable member is maintained at least 10 mm or more.