JP3442362B2 - Expansion device for road bridge joint - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic device for a road bridge joint.

[0002]

2. Description of the Related Art An expansion / contraction device is installed at a joint portion of a road bridge, and this expansion / contraction device allows a vehicle to travel on a bridge surface without obstruction while allowing expansion / contraction of the road bridge.
Rainwater and sediment are prevented from falling under the road bridge. For example, in Japanese Patent No. 2598244, two corrugated plates are vertically opposed to each other, and both sides of a rubber grooved sealing plate are adhered to the inner surfaces of the corrugated plates which are opposed to each other to prevent rainwater and earth and sand from falling. Has been planned. The seal plate described in this publication has a convex portion and a concave portion formed at both ends thereof to close both ends of the groove,
The seal plates of the expansion and contraction device which are adjacent to each other in the longitudinal direction of the seam are connected by fitting the convex portions and the concave portions of each other.

Further, Japanese Patent Laid-Open No. 6-41909 discloses that
It is described in the road bridge expansion and contraction device that double sealing is provided between the two vertical plates by providing sealing means on each of the upper and lower portions of the two vertical plates. That is, the upper sealing means is formed by filling the upper portion between the vertical plates with a liquid rubber sealing material and naturally vulcanizing it, and the lower sealing means bends the rubber plates into a U shape below the two vertical plates. , Both sides of which are fixed to the backs of both vertical plates.

[0004]

When the seal plates adjacent to each other in the longitudinal direction of the seam are joined by fitting or other methods as described above, there is a problem that water leakage is likely to occur at the joined portion. Further, although the double sealing structure as described above is advantageous in preventing water leakage, the upper sealing means is only filled with a liquid rubber sealing material and naturally vulcanized, so that the rubber deteriorates early and cracks occur. It easily enters or peels off from the vertical plate, and the sealing property cannot be exhibited for a long period of time.

Therefore, an object of the present invention is to improve the double seal structure to enhance the sealing property.

[0006]

In order to solve such a problem, the present invention enables a lower seal member to receive even if water leaks from a connecting position of an upper seal member and prevent leakage under the bridge. It is the one.

That is, the invention according to claim 1 is a road bridge
The seams extend in the longitudinal direction and the convex and concave parts face each other.
A pair of corrugated plates that are combined like
And a seal member extending in the longitudinal direction of the seam, which is adhered to the inner surface and closes the seam of the road bridge, the upper end of the corrugated plate is positioned at the road surface height , and the respective seal members are connected in the seam longitudinal direction. Multiple upper expansion joints and road bridge seams
Extend in the longitudinal direction so that the convex and concave parts face each other.
A pair of corrugated plates combined with each other
And a sealing member which is adhered to the surface and extends in the seam longitudinal direction for closing the seam of the road bridge, is arranged below the upper expansion joint, and a plurality of sealing members are connected to each other in the seam longitudinal direction. With a lower expansion joint ,
Make sure that the corrugated sheet and the corrugated sheet of the lower expansion joint are flush with each other.
Provided is the extension device of a road bridge seam portion, characterized in that the connection position of the sealing member between the upper expansion joint, a connecting position of the seal member between the lower expansion joint is shifted in the seam longitudinally .

The invention according to claim 2 has a plurality of sealing members that extend in the longitudinal direction of the seam of the road bridge and are connected to each other in the longitudinal direction of the seam to close the seam of the road bridge, and the upper end is positioned at the road surface height. Expansion joint and a lower seal means arranged below the expansion joint, and the lower seal
The means extend in the longitudinal direction of the seam of the road bridge , with both sides extending as described above.
A road bridge is provided by a holding plate that is provided separately from the compression joint.
Fixed to the body, the lower sealing member for closing the seam of the road bridge
An expansion / contraction device for a road bridge joint , wherein the expansion joint has a connection position between the seal members, which is arranged above a portion of the lower seal member that continuously and seamlessly extends in the longitudinal direction of the seam. Is.

The invention according to claim 3 is a seam of a road bridge.
A path extending longitudinally and connected longitudinally to each other at the seam.
It has multiple sealing members that close the seams of the road bridge, and the upper end is the road surface.
Expansion joint positioned at height and below the expansion joint
And a lower seal means arranged in
The means extend in the longitudinal direction of the seam of the road bridge, with both sides extending as described above.
The expansion and contraction is performed by a support plate that is provided separately from the compression joint.
Lower seal member, which is supported by the joint and closes the seam of the road bridge
The connecting position of the seal members of the expansion joint is
Seamless of the lower sealing member Continuously in the longitudinal direction
A road characterized by being located above the extending part
It is an expansion and contraction device for the road bridge joint.

The invention according to claim 4 is the joint of a road bridge.
A path extending longitudinally and connected longitudinally to each other at the seam.
It has multiple sealing members that close the seams of the road bridge, and the upper end is the road surface.
Expansion joint positioned at height and below the expansion joint
And a lower seal means arranged in
The means extend in the longitudinal direction of the seam of the road bridge, with both sides extending as described above.
Road Hashimoto with a support plate provided separately from the compression joint
The lower seal member that is supported by the body and closes the seam of the road bridge
And the connecting position of the seal members of the expansion joint is
The seam of the lower seal member extends continuously in the longitudinal direction.
A road characterized by being placed above the jumping part
It is an expansion and contraction device for bridge joints .

The lower sealing member according to any one of claims 2 to 4 may be one that continuously extends over the entire length of the road bridge joint to be sealed, but a plurality of sealing members are connected in the longitudinal direction of the joint. You may make it comprise.

Therefore, in the present invention, even if water leaks downward from the portion where the seal members of the upper expansion joint are connected to each other, the amount of water leakage is small and the leaked rainwater is lower. Since it is received by a portion of the seal member that continuously extends in the seam longitudinal direction, it is advantageous in preventing leakage of water from the lower seal member to the bottom of the bridge. Even if there is a connecting portion between the lower sealing members, the rainwater leaked from the connecting portion of the upper sealing member as described above is received by the continuously extending portion in the longitudinal direction of the joint of the lower sealing member. Therefore, the leaked water does not concentrate on the connection portion of the lower seal member, and it is possible to prevent further leakage of water under the bridge from the connection portion of the lower seal members.

[0013]

As described above, according to the present invention, since the connection position of the upper sealing members is arranged above the continuously extending portion in the longitudinal direction of the seam of the lower sealing member, the upper sealing member is temporarily tentatively arranged. Even if water leaks downward from the connecting portion between the seal members, it is prevented that water leaks further below the bridge from the lower seal member, and the sealing property of the road bridge joint portion is improved.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 shows a joint portion of a road bridge according to the present embodiment with a part of concrete omitted. In the figure, 1
Is a road bridge body, 2 is a bridge surface pavement, and a road bridge body 1, 1
The road bridge expansion / contraction device 3 is installed at the seam part of. The road bridge expansion / contraction device 3 includes an upper expansion joint 4 and a lower expansion joint 5.

First, the lower expansion joint 5 will be described. As shown in FIG. 2, the lower expansion joint 5 is provided with a pair of corrugated plates 6 and 6 which are vertically assembled and have convex portions and concave portions facing each other. There is. The corrugated sheets 6 and 6 extend in the longitudinal direction of the joint (the width direction of the road bridge). A groove-shaped rubber seal plate (seal member) 7 is disposed between the corrugated plates 6 and 6. This seal plate 7 is provided with seal plate bodies whose both sides are adhered to the inner surfaces of the corrugated plates 6 and 6 which face each other, a groove-shaped protrusion 7a provided at one end of the seal plate body, and provided at the other end. Grooved concave portion 7b.

As shown in FIG. 3, the groove-shaped convex portion 7a has a groove shape which is connected to one end of the seal plate body and projects outward from the end of the corrugated plate 6, and the tip of the groove is stopped. It is blocked by a water wall. The groove-shaped concave portion 7b is folded back from the other end of the seal plate main body and extends inward inside the groove of the seal plate main body, and is formed in a groove shape into which the groove-shaped convex portion 7a is fitted. The tip of the groove is closed by a water blocking wall. Further, the groove-shaped concave portion 7b is connected to the edge of the seal plate body, but the part that goes into the back from this edge overlaps with the seal plate body as shown in FIG. 4 and is not restrained. .

A bottom plate 9 is provided on the lower end of the corrugated plate 6 on the convex side, and an anchor 10 is provided on the back surface of the corrugated plate 6. Plates 11 for connecting the expansion joints adjacent to each other in the longitudinal direction of the seam are provided at both ends of the corrugated plate 6 so as to project laterally.

The upper expansion joint 4 has the same structure as the lower expansion joint 5 except that it does not have a bottom plate, and has a pair of corrugated plates 6, 6 and groove-shaped projections 7a and groove-shaped recesses 7b at both ends. Rubber seal plate (seal member) 7 and anchor 1
0 and a plate 11. The upper end of the corrugated plate 6 of the upper expansion joint 4 is positioned at the road surface height.

As shown in FIG. 1, the upper expansion joints 4 which are adjacent to each other in the longitudinal direction of the seam have their respective sealing plates 7 and the groove-shaped convex portions 7.
The a and the groove-shaped recess 7b are fitted to each other without any gap, and the plates 11 of the corrugated plates 9 are connected by bolts. The lower expansion joints 5 adjacent to each other in the longitudinal direction of the seam are also connected to each other without gaps by fitting the groove-shaped projections 7a and the groove-shaped recesses 7b of the seal plates 7 with each other so that the plates 11 of the corrugated plates 9 are mutually connected. They are connected by connecting with bolts.

In this way, the connection position between the upper expansion joints 4 and the connection position between the lower expansion joints 5, that is, the connection position between the seal plates 7 of the upper expansion joint 4 and the seal plate of the lower expansion joint 5. The connection position of 7 comrades is shifted in the longitudinal direction of the seam.

The upper expansion joint 4 and the lower expansion joint 5 are mounted on the corrugated plate 6 of the lower expansion joint 5 so that the corrugated plates 6 of the upper expansion joint 4 are flush with each other, and the connecting plate 12 is attached. The upper expansion joint 4 is joined to the upper and lower expansion joints 4 by being provided so as to straddle the upper and lower corrugated plates 6 and welded to their back surfaces.
The upper end of the corrugated plate 6 has a road surface height.

On both sides of the upper expansion joint 4 and the lower expansion joint 5, that is, on the back of the corrugated plate 7, concrete 13 is cast up to the height of the road surface.

In the groove of the seal plate 7 of the upper expansion joint 4, sand,
A liquid rubber sealing material or other filling material 15 is filled, and the groove of the seal plate 7 of the lower expansion joint 5 is not filled with such a filling material to form a groove space. When the groove of the seal plate 7 of the upper expansion joint 4 is filled with sand and the liquid rubber seal material, the sand is first put, and the liquid rubber seal material is poured on the sand and naturally vulcanized.

As described above, in the road bridge expansion / contraction device 3, both ends of the groove formed by the seal plates 7 of the respective upper expansion joints 4 are closed by the respective water stop walls of the groove-shaped convex portion 7a and the groove-shaped concave portion 7b. The grooves are independent of each other. Therefore, even if sand, a sealing material, or other filler is put in the groove of each seal plate 7, or rainwater enters, they will stay in the groove and will not enter the groove of the seal plate 7 of the adjacent upper expansion joint 4. Does not leak.

Also, the seal plate 7 of the adjacent upper expansion joint 4 is adjacent to each other.
Since the groove-shaped convex portions 7a and the groove-shaped concave portions 7b are connected to each other without any gap, water leakage from the connection portion is prevented. Even if rainwater leaks from the connection part and falls, the amount of leakage is very small. Moreover, the leaked rainwater is received by the portion other than the connecting portion between the seal plates 7 of the lower expansion joint 5, that is, the groove portion that continuously and seamlessly extends in the longitudinal direction of the seam of the seal plate 7, and thus leaks under the bridge. Is prevented.

<Second Embodiment> This embodiment is shown in FIGS. 5 and 6. The expansion joint 4 of the road bridge expansion / contraction device 3 includes a pair of corrugated plates 6 and 6 provided similarly to the upper expansion joint of the first embodiment, and a seal plate 7 having groove-shaped convex portions 7a and groove-shaped concave portions 7b at both ends. And an anchor (not shown), and a bottom plate 9 is provided at the lower end on the convex side of the corrugated plate 6. Expansion joints 4 and 4 that are adjacent to each other in the longitudinal direction of the seam connect the seal plates 7 to each other by fitting the groove-shaped convex portion 7a and the groove-shaped concave portion 7b without any gap,
The plates (not shown) of the corrugated plates 9 are joined together by bolts. The filler 15
Is omitted. This point is the same in the other embodiments described below.

The lower sealing means 5, as shown in FIG. 6 except for the expansion joint 4, has a seal plate (seal member) 7 which continuously and continuously extends over the entire length of the road bridge joint to be sealed, and this seal plate. It is provided with pressing plates 16 and 16 for fixing 7 to the road bridge main bodies 1 and 1.

That is, the seal plate 7 is formed by bending a rubber plate into a U shape, and the bent portion is the road bridge main body 1, 1.
It is placed in the play space 18 of the road bridge, and both sides of the road bridge body 1, 1
It is hung on the edges of the notched step portions 1a, 1a formed in. The holding plate 16 has an inverted L-shaped cross section and extends in the longitudinal direction of the seam, and the horizontal portion of the holding plate 16 is superposed on the side portion of the sealing plate 7 from above. The horizontal portion of the pressing plate 16 is fixed to the notch step portion 1a together with the sealing plate 7 by the concrete nail 17. The vertical portion of the holding plate 16 sandwiches the upper portion of the U-shaped bending portion of the seal plate 7 in the end surface of the road bridge body 1. A rubber plate containing a reinforcing cloth is preferably used as the seal plate 7 of the lower sealing means 5.

In this way, the groove of the U-shaped bending portion of the seal plate 7 is filled with the sponge 19 to the same height as the upper surface of the horizontal portion of the holding plate 16. Moreover, as shown in FIG.
When the concrete 13 is placed in the notch step 1a at the lower back of the concrete, the concrete 13 causes the lower sealing means 5 to
A barrier plate 20 is provided on the top of the barrier plate 20 to prevent the barrier plate 20 from leaking.

In the construction, first, the lower sealing means 5
, The sponge 19 is filled, the expansion joint 4 is arranged on the sponge 19, and the concrete 13 is placed on the backs of the corrugated plates 6 and 6.

Therefore, also in the case of this embodiment, the first embodiment
Similarly, even if rainwater leaks from the connecting portion of the seal plates 7 of the adjacent expansion joints 4 and falls, the leaked rainwater continuously continues in the longitudinal direction of the seam of the seal plate 7 of the lower sealing means 5. Since it can be received at the extended part, it is prevented from leaking under the bridge.

Further, the vehicle running noise on the road bridge is absorbed and blocked by the sealing plate 7 and the sponge 19 of the lower sealing means 5, and the noise under the bridge is reduced.

Further, when the expansion joint 4 is installed, the joint parts and tools are prevented from falling from the play space 18 under the bridge by the lower seal means 5, and the safety of the construction is enhanced.

<Third Embodiment> This embodiment is shown in FIGS. The expansion joint 4 of the road bridge expansion / contraction device 3 includes a pair of corrugated plates 6 and 6 provided as in the first embodiment, a seal plate 7 having groove-shaped projections 7a and groove-shaped recesses 7b at both ends, and an anchor. The bottom plate 9 is provided at the lower end of the corrugated plate 6 on the convex side. Then, expansion joints 4, 4 adjacent to each other in the longitudinal direction of the seam
Seals the respective sealing plates 7 with each other by using the groove-shaped projections 7a and the groove-shaped recesses 7a.
The plates 11 of the corrugated plates 9 are connected to each other by bolts so that the plates 11 are connected to each other without any gaps.

The lower sealing means 5 includes a plurality of rubber sealing plates 7 extending in the longitudinal direction of the seam and abutting each other in the longitudinal direction of the seam, and support plates 21 and 21 for supporting the sealing plates 7 on the expansion joint 4. , This support plate 2 as shown in FIG.
1 and a holding plate 22 for fixing the seal plate 7.

That is, the support plate 21 of the lower sealing means 5
Is a vertical mounting portion fixed to the back surface of the corrugated plate 6, and a water collecting portion extending obliquely from the lower end of the mounting portion toward the play space 18.
And a supporting portion vertically lower than the lower end of the water collecting portion. The mounting portion is fixed to the corrugated plate 6.

The sealing plate 7 of the lower sealing means 5 is formed by bending a rubber plate into a U-shape so as to have a groove shape, and both sides thereof are superposed on the back surface of the supporting portion of the supporting plate 21. ,
A presser plate 22 is overlaid on it and is fixed to the support portion by bolts. Both ends of the groove of the seal plate 7 are closed by a flexible water stop wall 23 of a seal end member formed of a thin rubber plate.

The seal plate 7 of the lower seal means 5 is formed longer than the seal plate 7 of the expansion joint 4. That is, as shown in FIG. 9, the expansion joint 4 (hence, its sealing plate 7) is, for example, about 1 m, and a plurality of them are connected in the joint longitudinal direction W, but the lower sealing means 5 (hence, its The seal plate 7) is a road lane width (2.75).
The length is set to be approximately equal to 3.75 m), and a plurality of them are abutted and connected in the longitudinal direction of the seam. However, the connection position (butting position) A of the seal plate 7 of the lower sealing means 5 is displaced from the connection position B of the seal plate 7 of the expansion joint 4 in the joint longitudinal direction. This deviation amount may be, for example, about 50 mm.

Thus, the groove bottom of the sealing plate 7 of the lower sealing means 5 is inclined downward in one of the longitudinal directions of the seam in correspondence with the transverse gradient of the road, and the lower end portion thereof is concerned. A drain pipe 24 for draining water from the groove of the seal plate 7 is connected. The drainage pipe 24 is connected to a drainage pipe (not shown) that extends from the drainage basin on the road bridge shoulder along the bridge pier to the water collection basin under the bridge. In addition, in FIG. 9, 25 is a balustrade of a road bridge.

Therefore, also in the case of this embodiment, even if rainwater leaks from the connecting portion of the seal plates 7 of the adjacent expansion joints 4 and falls, the leaked rainwater is not removed.
And is guided to the drainage pipe through the drainage pipe 24, so that it is possible to avoid water leakage from the butt joint of the seal plate 7 of the lower sealing means 5 to the underside of the bridge.

10 and 11 show the lower sealing means 5 described above.
A modification of is shown.

That is, in the seal end member of this example, the bottom plate portion 31 and the side plate portions 32, 3 rising from both side edges thereof.
2 and a water blocking wall 23 that rises from the front edge of the bottom plate portion 31, and is made of a thin rubber having an open rear surface and an upper surface. The water blocking wall 23 is formed in an uneven shape (bellows shape) having a vertical broken line, and both side edges have side plate portions 32, 3
Followed by 2. This seal end member is fitted to the end portion of the seal plate 7 so that the seal plate 7 is located inside, and the overlapped portion is bonded.

In this way, the water blocking walls 23 of the lower sealing means 5 adjacent to each other in the longitudinal direction of the seam are combined so that the concave portions and the convex portions thereof overlap with each other, that is, the concave and convex portions mesh with each other. In addition, the bottom plate portion 31 of the seal end member on the side that is lowered and lowered corresponding to the transverse gradient of the lower sealing means 5 is provided.
A drain pipe 24 is connected to the. This drainage pipe 24
At the bottom of the seal plate 7 provided with the attached seal end member,
The notch 7c is formed so that the connection port of the drainage pipe 24 is not blocked.

Therefore, in this modification, since the water blocking wall 23 is formed in an uneven shape having a vertical fold line, that is, in a bellows shape, the stretchability in the bridge length direction is high. In addition, the water stop wall 23 on the upper side and the water stop wall 23 on the lower side of the cross slope are
Since the concavities and convexities are combined so as to mesh with each other and the contact area is wide, the water blocking walls 23, 2
3 is advantageous in preventing water leakage from the connection part.

<Embodiment 4> This embodiment is shown in FIG. The expansion joint 4 of the road bridge expansion / contraction device 3 includes a pair of corrugated plates 6 and 6 provided as in the first embodiment, a seal plate 7 having groove-shaped projections 7a and groove-shaped recesses 7b at both ends, and an anchor. The bottom plate 9 is provided at the lower end of the corrugated plate 6. Then, the expansion joints 4 and 4 adjacent to each other in the longitudinal direction of the seam connect the seal plates 7 to each other without a gap by fitting the groove-shaped projections 7a and the groove-shaped recesses 7b, and the corrugated plates 9 of each other. The plates 11 are joined together by bolts.

The lower sealing means 5 includes a seal plate 7 which continuously extends over the entire length of the road bridge joint to be sealed, and support plates 26 and 26 which support the seal plate 7 on the road bridge main bodies 1 and 1. And a holding plate 27 that holds the seal plate 7 to the support plate 26.

That is, the support plates 26, 26 are erected on the notch step portions 1a, 1a and extend linearly in the joint longitudinal direction below the bottom plates 9, 9 of the expansion joint 4, and at the back portion. An anchor 10 is provided. The seal plate 7 is formed by bending a rubber plate in a U-shape between the support plates 26, 26, and both side portions thereof extend beyond the upper ends of the support plates 26, 26 and extend to the back surface thereof. A pressing plate 27 is attached to the back surface of the plate 26 by a bolt.
Is fixed through.

Then, the expansion joint 4 has the bottom plate 9 thereof.
Is placed on the seal plate 7 of the lower seal means 5, and thus the seal plate 7 is sandwiched between the bottom plate 9 and the support plate 26.

Therefore, also in the case of this embodiment, even if rainwater leaks from the connecting portion of the seal plates 7 of the expansion joints 4 adjacent to each other and drops, the leaked rainwater is not removed.
Since it is received by a portion that continuously extends in the longitudinal direction of the seam, it is possible to prevent leakage under the bridge.

With respect to the sealing plate of the lower sealing means 5, in the above-described Embodiments 2 and 4, the road plate is continuously and continuously extended over the entire length of the road bridge joint to be sealed, and in Embodiment 3, the length is approximately equal to the lane width. However, if necessary due to construction restrictions, etc., divide them into appropriate lengths and connect them to each other, and shift the connection position with respect to the connection position of the upper expansion joint 4 in the joint longitudinal direction. Good.

[Brief description of drawings]

FIG. 1 is a perspective view showing a road bridge seam part according to a first embodiment of the present invention with a part of the seam part omitted.

FIG. 2 is a perspective view showing a lower expansion joint of the same embodiment with a part thereof omitted.

FIG. 3 is a vertical cross-sectional view showing the relationship between the groove-shaped projections and the groove-shaped recesses of the seal plate of the lower expansion joint of the same embodiment.

FIG. 4 is a transverse cross-sectional view showing the lower expansion joint of the same embodiment, taken across the groove-shaped recess of the seal plate.

FIG. 5 is a perspective view showing, in a partial cross section, a road bridge joint according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing, in a partial cross section, a state in which a lower sealing means of the road bridge joint portion of the same embodiment is installed.

FIG. 7 is a perspective view showing a road bridge seam part according to a third embodiment of the present invention with a part of the seam part omitted.

FIG. 8 is a perspective view showing a seal end member of the lower sealing means of the same embodiment.

FIG. 9 is a partially omitted side view showing the relationship between the connection position of the expansion joint and the connection position of the lower sealing means of the same embodiment.

FIG. 10 is a perspective view showing another example of the seal end member of the same embodiment.

FIG. 11 is a plan view showing a connection state between the seal end members of the same embodiment.

FIG. 12 is a perspective view showing a road bridge joint part according to a fourth embodiment of the present invention with a part thereof omitted and a part thereof shown in section.

[Explanation of symbols]

1 Road bridge body 2 bridge surface pavement 3 Road bridge expansion device 4 Upper expansion joint (expansion joint) 5 Lower expansion joint (lower sealing means) 6 corrugated board 7 Seal plate (seal member) 7a Groove-shaped protrusion 7b Groove-shaped recess

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Akashi 2-26-1, Midori, Asanan-ku, Hiroshima-shi, Hiroshima JH Midori Government Building Japan Road Public Corporation China Branch Hiroshima Technical Office (56) Reference (JP, A) JP-A-9-49204 (JP, A) Actually developed 60-58607 (JP, U) Actually developed 57-4406 (JP, U) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) E01C 11/02

Claims (4)

(57) [Claims] 1. A convex portion extending along the longitudinal direction of a seam of a road bridge
Pair of corrugated plates in which the recess and the recess face each other
And a sealing member that is adhered to the inner surfaces of the corrugated plates facing each other and extends in the joint longitudinal direction that closes the joint of the road bridge ,
The upper end of the corrugated plate is positioned at the road surface height, and a plurality of upper expansion joints whose seal members are connected to each other in the longitudinal direction of the seam, and the convex portions and the concave portions extending in the longitudinal direction of the seam of the road bridge face each other. Or
A pair of corrugated plates that are combined to meet each other, and both corrugated plates
Facing each have a seal member extending seam longitudinally bonded to the inner surface close the seam of the road bridge, is arranged on the lower side of the upper expansion joint, the sealing member to each other to each other are connected to the seam longitudinally A plurality of lower expansion joints, and the corrugated plate of the upper expansion joint and the corrugated plate of the lower expansion joint are
The road bridge, which is provided so as to be flush with each other, and in which the connecting position between the seal members of the upper expansion joint and the connecting position between the seal members of the lower expansion joint are deviated in the joint longitudinal direction. Expansion and contraction device for seams. 2. An expansion joint having a plurality of sealing members each extending in the joint longitudinal direction of the road bridge and connected to each other in the joint longitudinal direction to close the joint of the road bridge, and the upper end of which is positioned at the road surface height. And a lower seal means arranged below the expansion joint.
For example, the lower seal means extends the seam longitudinal direction of the road bridge,
Both sides are attached to the holding plate that is provided separately from the expansion joint.
Therefore , it has a lower seal member that is fixed to the main body of the road bridge and that closes the seam of the road bridge, and the connecting position of the seal members of the expansion joint is a portion that continuously extends in the seam longitudinal direction of the lower seal member. An expansion / contraction device for a road bridge joint, which is arranged above the road. 3. Each of the road bridges extends in the longitudinal direction of the seam and is mutually connected.
In seams A plurality of seams connected in the longitudinal direction to block the seams of road bridges.
It has a seal member and its upper end is positioned at the road level.
Equipped with expansion joint and lower sealing means arranged below the expansion joint
For example, the lower seal means extends the seam longitudinal direction of the road bridge,
Both sides are attached to the support plate that is provided separately from the expansion joint.
Therefore, the seam of the road bridge supported by the expansion joint is blocked.
It has a lower sealing member, and the connecting position of the sealing members of the expansion joint is
Seal member seam A part that continuously extends in the longitudinal direction.
Road bridge joint characterized by being placed above the minute
Telescopic device. 4. Each of the road bridges extends in the longitudinal direction of the seam and is mutually connected.
In seams A plurality of seams connected in the longitudinal direction to block the seams of road bridges.
It has a seal member and its upper end is positioned at the road level.
Equipped with expansion joint and lower sealing means arranged below the expansion joint
For example, the lower seal means extends the seam longitudinal direction of the road bridge,
Both sides are attached to the support plate that is provided separately from the expansion joint.
Therefore, it is supported by the road bridge body and closes the seams of the road bridge.
The expansion joint has a sealing member, and the connecting position of the sealing members of the expansion joint is
Seal member seam A part that continuously extends in the longitudinal direction.
Road bridge joint characterized by being placed above the minute
Telescopic device.