JP2653993B2 - Road bridge expansion joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a road bridge expansion joint.

[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. Are formed so as to be bent in a zigzag manner to form a wavy play extending in the longitudinal direction of the joint, and both ends of the seal plate are fixed to opposing inner surfaces of the vertical substrates.

[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 longitudinal direction of the seam are in a state where they are merely abutted with each other, or in a state where a part thereof is overlapped, or in a state where they are separated from each other. There is a need to. 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, after installing the expansion joint at the road joint, the connecting seal plate must be inserted into the zigzag of the opposing tooth profile from the bent wavy play. In addition, since a wide insertion gap cannot be obtained, the insertion is difficult, and in some cases, the insertion cannot be performed. Also, the work of bonding the inserted connection seal plate and the seal plate of the expansion joint is difficult because the operator cannot insert his hand through the wavy play.

On the other hand, the vertical substrates opposed to the respective expansion joints are opened in an inverted "C" shape so as to widen the wavy play at the road joints. It is conceivable to perform a connection operation, and then raise the expansion joint so that the vertical substrate is vertical and fix it. However, when the total length of a series of connected expansion joints is long, it is difficult to raise the whole of the expansion joints at the same time and position them so as to have a corrugated play of a predetermined size.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides an expansion joint by forming a play gap wider than the corrugated play gap by partially cutting out the longitudinal end of the joint of the tooth profile of the expansion joint. Even after installation at the road joint, the connection of the expansion joint seal plates by the connection seal plate can be performed easily and reliably without water leakage by utilizing this play space. .

[0007] That is, a means for solving the above problem is that a tooth-shaped portion provided with a plurality of convex portions projecting toward each other at intervals in the longitudinal direction of the joint is provided at the upper end of each of the vertical substrates facing in the bridge axis direction. Formed, and each tooth profile part is bent in a zigzag manner and faces each other to form a wavy play extending in the seam longitudinal direction, and a seal plate is provided between the vertical substrates, and the seam longitudinal direction is provided. A road bridge expansion joint to be connected, wherein a part of the end of the tooth profile in the seam longitudinal direction is cut off, and both ends of the seal plate of both road bridge expansion joints adjacent in the seam longitudinal direction are crotched. A gap wider than the corrugated gap for inserting a connecting sealing plate for connecting the two sealing plates by overlapping is formed.

In this means, since the play gap formed at the longitudinal end of the joint of the road bridge expansion joint is wider than the wavy play gap, the connecting seal plate is formed from this wide play between the vertical board below the tooth profile. In addition, the work of connecting the seal plate of the expansion joint with the inserted seal plate for connection can be performed from the wide gap, which is advantageous in terms of workability.

Here, the length of the play at the end portion is such that, if the play is formed only in one of the expansion joints adjacent to each other in the longitudinal direction of the seam, workability and, as a result, reliable water stoppage is performed. In view of the above, the length is preferably 5 cm or more, and the upper limit is preferably determined based on the tire width of the vehicle from the viewpoint of the running performance of the vehicle, for example, about 15 cm. In the case where the play is formed in both expansion joints adjacent to each other in the seam longitudinal direction, it is preferable that the play is connected in a straight line. In that case, the play at the end of each expansion joint is preferable. Is preferably 2.5 cm or more and 7.5 cm or less.

[0010]

Therefore, according to the present invention, a part of the longitudinal end of the joint of the expansion joint is cut out to form a play wider than the wavy play. It is possible to insert the seal plate for connection under the tooth profile and to connect the expansion joint to the seal plate by using this, and it is advantageous in that the workability is drastically improved and water stoppage is ensured. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the road bridge expansion and contraction device shown in FIG. 1, 1 is an expansion joint, 2 is a floor slab, 3 is pavement, and 4 is post-cast concrete. The expansion joint 1 is provided with steel joint members 5 and 5 facing each other, a main body seal plate 6 and anchors protruding from both outer sides of the joint members 5 and 5, and the floor slabs facing each other with the floor slab 10 therebetween. After being cast at the ends of 2,2, they are fixed to the cast concrete 4,4 by the 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. The tooth-shaped portion 8 is formed by projecting a plurality of trapezoidal convex portions 8a at intervals in the longitudinal direction of the joint.
The tooth profiles 8, 8 of each other face each other in a zigzag manner so as to form a wavy play 9 extending in the longitudinal direction of the seam.
At the end of the expansion joint 1 in the joint longitudinal direction, a linear play gap 11 is formed in which a part of the projection 8a of the tooth profile 8 is cut out and extends linearly in the joint longitudinal direction.

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 (about 5 cm) than half of the pitch of the waveform play gap. ing. Further, in the case of this example, a linear play gap 1 that is linearly continuous with both of the expansion joints 1 adjacent to each other in the seam longitudinal direction.
1, 11 are formed, and the total length of both is 10c
m.

The main body sealing plate 6 is formed of a flexible material such as rubber and is bent in a U-shape. As shown in FIGS. 3 to 5, the upper edges of both sides of the main body sealing plate 6 are attached to the opposing inner surfaces of the vertical substrates 7, 7.
It is fixed by bolts so as to be in a state of being pressed by 2 and 12. The main body sealing plate 6 is used for each expansion joint 1
And extends over the entire length of each expansion joint 1. On the other hand, the main body holding plate 12 is a strip extending in the seam longitudinal direction in a range excluding the linear 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. That is, the connection sealing plate 13 is formed of the same flexible material as that of the main body sealing plate 6 and is shorter than the total length of the two adjacent linear gaps 11 of the adjacent expansion joints 1. , And are bent in a U-shape and overlapped from above so as to extend over both of the body seal plates 6 and 6. The ends of the two body seal plates 6 and 6 and the connection seal plate 13 are both connected by the connection holding plate 14 extending in the longitudinal direction of the joint in a strip shape.
7 is fixed by bolts so as to be in pressure contact with the inner surface.

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 connecting sealing plate 13 is removed from the linear play gaps 11, 11 which are linearly connected to the toothed portions 8, 8.
And overlaid on the main body sealing plates 6 and 6 of the adjacent expansion joints 1 and 1. The main body sealing plate 6 and the connection sealing plate 13 are bonded with an adhesive. Then, the connection holding plate 14 is inserted through the linear play gaps 11, 11 and applied to the upper edges of both sides of the superposed main body seal plates 6, 6 and the connection seal plate 13, and is bolted. The body sealing plates 6 and 6, the connection sealing plate 13 and the connection pressing plate 14 are 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 and 6 by the connecting sealing plate 13 after placing the post-cast concrete 4 and 4 on both sides of the expansion joint 1.

FIGS. 6 to 8 show other examples of the seal plate.

That is, in the previous example, the seal plate was bent in a U-shape. In this example, however, as shown in FIG. 6, the main body seal plate 26 was bent in an inverted U-shape.
It is fixed to the vertical substrates 7, 7 by the connection holding plate 34 and the bolts together with the connection sealing plate 33 bent in a letter shape.

More specifically, as shown in FIG.
The main body sealing plate 26 is loosely temporarily fixed below the linear play gap 11 by applying a nut 36 to the bolt 35 together with the connection pressing plate 34. On the other hand, FIG.
As shown in FIG. 7, a U-shaped notch 37 opened downward is formed in a portion corresponding to the bolt 35. The connection seal plate 33 is inserted from the linear play gap 11 and the U-shaped notch 37 is fitted to the bolt 35 so as to overlap and adhere to the main body seal plate 26 from above. Thereafter, by turning the hand from below the vertical board 7 and tightening the nut 36 to the bolt 35, the seal plates 26 and 33 are pressed against the vertical board 7 by the connection pressing plate 34.

In the case of such a connection method, FIG.
As shown in (a plan view in which a part of the vertical substrate is cut horizontally and shown in a partial cross section), the end of the main body seal plate 26 is disposed inside the connection seal plate 34 apart from the vertical substrate 7 inward. Therefore, a gap 38 extending vertically between the end of the connection seal plate 34 and the main body seal plate 34 is formed.
8 is closed by filling with a rubber sealing material.

[Brief description of the drawings]

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

FIG. 2 is a perspective view, partially in cross section and partially omitted, showing a joint member of an expansion joint connected in the longitudinal direction of the seam;

FIG. 3 is a plan view showing a portion of an expansion joint connected in a longitudinal direction of the seam, partially cut away;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is a sectional view showing another example of the seal plate (a sectional view similar to FIG. 5).

FIG. 7 is a sectional view showing an attached state of the connection seal plate in the same example.

FIG. 8 is a perspective view of a connection sealing plate of the same example.

FIG. 9 is a plan view showing a partial cross section of the seal plate connecting portion of the same example cut horizontally at a portion of a vertical substrate.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 expansion joint 2 floor slab 3 pavement 4 backfill concrete 5 joint member 6, 26 main body sealing plate 7 vertical board 8 toothed portion 8 a convex portion 9 corrugated play 11 linear play 12 main body holding plate 13, 33 connection seal plate 14,34 Connection holding plate 35 Bolt 36 Nut

Claims (1)

(57) [Claims] 1. A tooth profile having a plurality of projections projecting toward each other at intervals at a seam longitudinal direction is formed at an upper end of each of vertical substrates facing in a bridge axis direction, and each tooth profile is formed. Are bent in a zigzag manner so as to form a wavy play extending in the seam longitudinal direction, a seal plate is provided between the vertical substrates, and a road bridge expansion joint connected in the seam longitudinal direction is provided. A part of the end of the tooth profile in the seam longitudinal direction is cut out,
A clearance wider than the above-mentioned corrugated clearance for inserting a connection sealing plate that overlaps with both seal plates of both road bridge expansion joints adjacent to each other in the seam longitudinal direction and that overlaps and connects the two seal plates is provided. A road bridge expansion joint characterized by being formed.