JP2653994B2 - Seal structure of road bridge expansion and contraction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road bridge expansion / contraction device.

[0002]

2. Description of the Related Art An example of a road bridge expansion joint is disclosed in Japanese Utility Model Publication No. 5-7282. In this expansion joint, a toothed portion provided with a plurality of protrusions projecting toward each other at intervals in a seam longitudinal direction is formed at an upper end of each of the vertical substrates facing in the bridge axis direction. Of the rubber seal plate are fixed to opposing inner surfaces of the vertical substrates, while the tooth profile portions are bent in a zigzag manner to form a wavy play extending in the seam longitudinal direction. .

[0003] The above-mentioned expansion joint is usually made to have a length of 1 to 2 m. Therefore, a plurality of expansion joints are connected and installed in the seam portion of the road bridge in the seam longitudinal direction. In this case, the seal plates of the expansion joints adjacent to each other in the seam longitudinal direction are in a state of merely abutting each other,
It is necessary to prevent water leakage from this butt. As a means for this, a method is generally adopted in which a short connecting seal plate having a length of about 10 cm is crotch-bonded to both seal plates of adjacent expansion joints.

[0004]

However, since both the seal plate and the connection seal plate of the above-mentioned expansion joint are made of rubber and soft, when both are overlapped and pressure-bonded (pressure bonding), In addition, there is a problem that the seal plate is irregularly deformed and moved due to the force of the operator, and it is difficult to surely adhere the two to each other.

[0005]

According to the present invention, the seal plate is made of metal, and a combination of the seal plate and a rubber seal material enables the seal plates to be securely bonded to each other.

[0006] That is, the invention according to claim 1 for solving the above-mentioned problem is that the upper end of each of the vertical substrates facing in the bridge axis direction is provided with:
A plurality of expansion joints formed with tooth-shaped portions in which a plurality of protrusions alternately project toward the other side at intervals in the seam longitudinal direction so as to form a wavy play extending in the seam longitudinal direction by bending in a zigzag manner. In a road bridge expansion and contraction device, wherein the plurality of expansion joints are connected in the seam longitudinal direction at the seam portion of the road bridge, a flexible metal seal plate having a bent portion at the center and extending in the seam longitudinal direction is provided. Both side edges are fixed to the opposing inner surfaces of the vertical substrates facing each other of the expansion joints, and flexible metal connection sealing plates having a bending portion similar to the sealing plate are adjacent to each other in the seam longitudinal direction. And is adhered to the seal plates of the two expansion joints so as to be attached to the seal plates.

In the present invention, since the seal plate of the expansion joint and the seal plate for connection are both made of metal, they are not deformed irregularly by an external force when they are superimposed and adhered to each other. Work becomes easy, and reliable adhesion with high sealing properties can be expected. Although the seal plate and the connection seal plate of the expansion joint are both made of metal, they have flexibility, so that there is no problem in allowing expansion and contraction of the road bridge.

Here, if the sealing plate of the expansion joint is adhered to the vertical substrate via a rubber seal material, the sealing property between the sealing plate and the vertical substrate can be improved. When such a rubber sealing material is not interposed, putty is put on the corner formed between the upper edge of the sealing plate and the vertical substrate to improve the sealing property.

It is preferable to insert a rubber seal material between the seal plate of the expansion joint and the seal plate for connection in order to enhance the sealing property.

[0010]

According to the present invention, therefore, both side edges of a flexible metal seal plate are fixed to the inner surfaces of the vertical substrates facing each other in the expansion joint, and a flexible portion similar to the seal plate can be provided. The flexible metal connection seal plate is stretched over the seal plates of the two expansion joints adjacent to each other in the seam longitudinal direction and glued together, so that the seals of the expansion joints adjacent to each other are not hindered from expanding and contracting the road bridge. The plates can be easily and reliably adhered to each other with high sealing properties, and workability and sealing properties are improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

<Embodiment 1> In the road bridge expansion and contraction device shown in FIG.
Is an expansion joint, 2 is a floor slab, 3 is pavement, and 4 is post-cast concrete. The expansion joint 1 is made of a steel joint member 5,
5; a body sealing plate 6; and anchors protruding from both outer sides of the joint members 5 and 5; 4,
4 is fixed by an anchor.

As shown in FIG. 2, the joint member 5 of the expansion joint 1 includes a vertical substrate 7 extending in the longitudinal direction of the joint,
And a horizontally protruding tooth-shaped portion 8. A plurality of trapezoidal projections 8a are spaced apart in the longitudinal direction of the joint so that the toothed portions 8, 8 of the joint members 5, 5 are bent in a zigzag manner to form a wavy play 9 extending in the longitudinal direction of the joint. It protrudes alternately. At the end of the expansion joint 1 in the longitudinal direction of the joint, a part of the protruding portion 8a of the toothed portion 8 is cut out to have a play space wider than the wavy play 9 (a straight line extending linearly in the seam longitudinal direction). A play space 11 is formed.

The straight play gap 11 of the present embodiment has one tooth-shaped portion 8.
By cutting off one side half of the convex portion 8a of the other tooth shape and cutting off the side portion of the convex portion 8a of the other tooth shape portion 8, one tooth shape portion 8
Is formed to have a wide width extending from the concave portion (the portion between the convex portions 8a and the convex portions 8a) to the concave portion of the other tooth profile portion 8, and the length is longer than half the pitch of the waveform play gap 9 (about 5 cm in size). )It has become. Further, in the case of this example, linear play gaps 11 and 11 are formed in both of the expansion joints 1 and 1 adjacent to each other in the seam longitudinal direction, and the total length of both is approximately 10 cm (free play). The total length of the gaps 11, 11 is preferably in the range of 5 to 15 cm).

The main body sealing plate 6 is formed of a thin steel plate having flexibility, is bent into a U-shape so that a bent portion is formed at the center, and upper edges of both sides thereof are formed of the vertical substrates 7, 7. It is fixed to opposing inner surfaces via band-shaped rubber seals 15 extending in the seam longitudinal direction. In this case,
The main body sealing plate 6 and the rubber sealing material 15 are
They are fixed by bolts so as to be pressed against the vertical substrate 7 by the substrates 2 and 12. The main body sealing plate 6 and the rubber sealing material 15 are provided over the entire length of each joint member 5. On the other hand, the main body holding plate 12 is a strip extending in the seam longitudinal direction in a range excluding the straight play gap 11 (however, the main body holding plate 12 may be divided into several parts in the range). .

The main body seal plates 6, 6 of the expansion joints 1, 1 adjacent to each other in the longitudinal direction of the joint are connected to each other by the connection seal plate 13 and the connection rubber seal material 16 shown in FIG. That is, the connection sealing plate 13 is formed of a thin steel plate having the same flexibility as the main body sealing plate 6, and has a length greater than the total length of the two linear play gaps 11 of the adjacent expansion joints 1. Are also shorter. The connection rubber seal material 16 is formed of an unvulcanized rubber sheet attached to the entire surface of one side of the connection seal plate 13.

As shown in FIGS. 4 to 6, the sealing plate 13 for connection and the rubber sealing material 16 have a bent portion similar to that of the main body sealing plate 6 at the center and the rubber sealing material 16 is on the outside. It is bent in a U-shape as described above, and is adhered to both of the two main body sealing plates 6 and 6 from above so as to extend over the crotch. And, the both body sealing plates 6, 6
, The connecting seal plate 13 and the rubber sealing material 16 are pressed against the inner surfaces of the adjacent vertical substrates 7, 7 of the expansion joints 1, 1 by a connecting press plate 14 extending in a strip shape in the seam longitudinal direction. It is fixed by a bolt so that it becomes.

Next, a construction method will be described. First, at the seam of the road bridge, cutout steps 2a, 2a are formed at the ends of the opposing floor slabs 2, 2, and both cutout steps 2a, 2a are formed.
The expansion joint 1 is arranged at the center between 2a and the anchor is fixed to the existing reinforcing bar at the end of the floor slab. The expansion joint 1 is fixed over the entire length of the road joint. The linear play gaps 11, 11 of the expansion joints 1, 1 adjacent to each other in the seam longitudinal direction are connected in a straight line.

Then, the sealing plate 13 and the rubber sealing material 16 for connection are inserted under the toothed portions 8 and 8 from the linear play gaps 11 and 11 connected in a straight line, and the expansion joints 1 and 2 adjacent to each other are inserted. The sheet is pressed against the main body sealing plates 6 and 6.
As a result, the main body sealing plate 6 and the connection sealing plate 13 are bonded by the unvulcanized rubber sealing material 16. However, since the sealing plates 6 and 13 are formed of a steel plate, they are not bonded during the bonding operation. It is not transformed into rules.

Next, a connection holding plate 14 is inserted from the linear play gaps 11 and 11 against the upper edges of both sides of the connection seal plate 13, and the connection seal plate 13 is bolted to the main body. Along with the sealing plate 6 and the rubber sealing material 16 for connection, it is fastened and fixed to the vertical substrate 7. Thereafter, post-cast concrete 4 is poured into the notch steps 2a on both sides of the expansion joint 1.

It is also possible to connect the main body sealing plates 6, 6 by the connecting sealing plate 13 after placing the post-cast concrete 4, 4 on both sides of the expansion joint 1.

FIG. 7 shows another sealing plate connection method. In the previous example, the linear joint 11 was formed in the expansion joint 1, but the expansion joint 21 of this example is a case where there is no linear play. In that case, the connection of the seal plate is performed before fixing the expansion joint 21 to the road bridge joint.

That is, in the above notch step, FIG.
As shown in the figure, the joint members 25, 25 of the expansion joint 21 are opened in an inverted "C" shape so that the upper side is widened, and the seal plate 13 for connection is opened from the gap between the widened tooth profiles 8, 8.
Then, the rubber sealing material 16 is inserted under the tooth portion 8, and overlaps the main body sealing plate 6. After inserting and tightening the connection holding plate as described above, the two joint members 25, 25 are inserted.
With standing upright, fix it at the seam of the road bridge and pour post-cast concrete.

<Embodiment 2> This embodiment is shown in FIG. That is, in the above example, the seal plate is bent in a U-shape, but in this example, the main body seal plate 26, the connection seal plate 33, and the connection rubber seal material 36 are bent in a V shape. Others are the same as the first embodiment.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a road bridge extension device.

FIG. 2 is a perspective view showing a joint member of an expansion joint connected in a longitudinal direction of the seam.

FIG. 3 is a perspective view showing a seal plate and a rubber seal material of an expansion joint and a seal plate and a rubber seal material for connection;

FIG. 4 is a plan view showing an expansion joint connected in the longitudinal direction of the seam, with a portion cut away.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is a sectional view showing another connection method of the seal plate.

FIG. 8 is a cross-sectional view showing the seal plate connection structure of the second embodiment (a cross-sectional view similar to FIG. 6).

[Explanation of symbols]

 1,21 Expansion joint 2 Floor slab 3 Pavement 4 Back-cast concrete 5,25 Joint member 6,26 Body seal plate 7 Vertical board 8 Toothed portion 8a Convex portion 9 Corrugated play 11 Linear play 12 Main body holding plate 13,33 Seal plate for connection 14, 34 Body holding plate 15 Rubber seal material 16 Rubber seal material for connection

Claims (1)

(57) [Claims] 1. A plurality of projections are spaced apart in the longitudinal direction of the joint so as to form a wavy play at the upper end of each of the vertical substrates facing in the bridge axis direction so as to bend in a zigzag manner and extend in the longitudinal direction of the joint. And a plurality of expansion joints formed with toothed portions that alternately protrude to the other side, and the plurality of expansion joints are connected in the seam portion of the road bridge in the seam longitudinal direction. Both side edges of a flexible metal sealing plate having a bending portion and extending in the longitudinal direction of the joint are fixed to opposing inner surfaces of the vertical substrates facing each other of the expansion joints, and the same bending portion as the sealing plate A road bridge, characterized in that a flexible metal connection seal plate having the following structure is stretched over the seal plates of both expansion joints adjacent to each other in the seam longitudinal direction and is adhered to the seal plates. Telescopic device.