JPH0351841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a non-drainage type sealing device for a comb-shaped expansion joint installed in a gap between opposing ends of a deck slab, such as a road bridge.

(Prior art) Conventionally, as a water stop device for a comb-type expansion joint device installed at the ends of opposing deck slabs, a water receiving plate is provided on the web plate with the lower surface of one face plate, and a water receiving plate is provided on the lower surface of the other face plate. A structure in which a drainage gutter was installed on a certain web plate was commonly used. However, this type of water stop device can only be installed in a small size.
It quickly filled up, causing road water to flow into the top of the pier.
There were disadvantages such as roughening the shoe seat, rusting the shoe, and damaging the shoe seat due to the freezing of running water.

Therefore, as shown in Fig. 5, in the comb-type expansion joint device installed at the opposite ends of the deck slab, a stainless steel or steel plate receiver is used that spans between the lower surface free web plates b, b of the face plates a, a. Two layers of a sealing material d and a backing material e such as foam rubber are installed between the plate c and the face plates a and a (Japanese Utility Model Publication No. 56-87503).

(Problems to be solved by the invention) However, when making existing finger joints non-drainage, including these proposals, it takes a long time to fill the existing finger joints with elastic sealing material from above. Traffic regulations are required, which impedes the passage of vehicles, and if the elastic sealing material deteriorates, it is difficult to remove.

The present invention aims to solve these problems and to provide a non-drainage type sealing device for a bridge expansion joint that is easy to construct.

[Structure of the invention]

(Means for Solving the Problem) The above problem is solved by solving the above-mentioned problem. The upper and lower surfaces of the cross-section perpendicular to the length direction have a bellows shape with repeating unevenness, and have a cavity inside, with air vent holes provided at arbitrary locations.The seal rubber is made of a seal rubber that has air vent holes provided at arbitrary locations. This problem is solved by providing a non-drainage type sealing device for a bridge expansion joint, which is characterized in that it is removed, brought into a contracted state, and installed using the expansion force that returns from the contracted state.

(Example) Next, an example of the present invention will be described based on the drawings. Figures 1 and 2 show the seal rubber 1 used in the invention when it expands and contracts, and Figure 3 shows the seal rubber 1 used in the invention.
A top view of the figure is shown.

The seal rubber 1 has a length in the road width direction, and in a cross section perpendicular to the length direction, is formed in a bellows shape with repeated protrusions 2 and recesses 3 on the upper and lower surfaces, and has a cavity 4 inside separated by a wall 5. It is formed by Note that the end of the cavity 5 is closed. Reference numeral 6 denotes a communication hole that communicates with the cavity 4 provided in the wall 5. Reference numeral 7 denotes an air circulation hole in the lower convex portion 2 that communicates the cavity 4 with the outside, and an air injection suction device 8 is connected to this hole.
This air injection inhaler 8 is formed to be able to communicate or close the cavity 4 with the outside, and is provided with a cap 9 for communicating or closing the cavity 4 with the outside. .

10 is a notch cut out on both sides, and a paste-like and fluid adhesive 11 is applied to this notch.
It contains. 12 is a wedge-shaped portion formed entirely on both sides.

The seal rubber 1 thus formed is the fourth
As shown in the figure, it is installed in the gap 13 between the opposing floor slab ends 16, 16.

Specifically, before on-site installation, a vacuum pump is connected to the air injection suction device 8 of the seal rubber 1, and the air inside the cavity 4 is sucked by the operation of the vacuum pump to create a vacuum state inside the seal rubber 1. 2nd from state
Bring to the deflated state shown in the figure and tighten the cap. and,
This seal rubber 1 is placed in a contracted state at a predetermined location under the face plate 14 of the clearance gap 13, and then the cap is loosened, and by using the expansion force of the seal rubber that tries to return to its original state from the contracted state, the left and right sides are attached to the web plate. 15, 15, and attach it closely. Here, it is natural that the width direction of the sealing rubber before the cavity is evacuated is larger than the gap width in view of the above-mentioned effect.

Therefore, in this embodiment, the wedge-shaped parts 12, 12 of the seal rubber 1 are in close contact with the web plates 15, 15 without shifting, and further, the notch part 10
The adhesive 11 contained in the seal rubber 1 is pushed out by the expansion of the seal rubber 1 and is securely attached to the gap.

Incidentally, even without the action of the wedge-shaped portion, the cutout portion 10, and the adhesive 11, the seal rubber 1 is effectively installed in the gap due to the expansion force that tends to return to its original position.

Overall, a undrained sealing device for a bridge expansion joint is formed in this way.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

Since the upper and lower sides of the seal rubber are bellows-shaped and the inside is hollow, when the air in the hollow is sucked and a vacuum state is created, the seal rubber becomes contracted in the width direction, so that the seal rubber can be easily positioned in the play space. Then, by utilizing the expansion force due to the restoring force of the seal rubber, both sides of the seal rubber can be brought into close contact with the opposing end faces of the floor slab or the web plate. Therefore, it is extremely easy to attach the seal rubber.

Moreover, since this device can be installed from the side of the ground cover in an existing comb-shaped expansion joint, there is no need to restrict traffic.

Furthermore, even if the seal rubber has deteriorated, if the seal rubber is installed only by using the expansion force using the restoring force, it can be removed by contracting the width in the width direction by sucking the air in the cavity and replacing it. is easy.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view perpendicular to the longitudinal direction of the seal rubber, Figure 2 is a cross-sectional view of the seal rubber in a state in which the air in the cavity in Figure 1 is sucked and contracted, and Figure 3 is a plan view of Figure 1. , FIG. 4 is a sectional view showing a state in which the sealing rubber is installed between the gaps between opposing ends of the floor slab, and FIG. 5 is a view of a conventional example. In the drawing, 1 is a seal rubber, 2 is a convex part, and 3 is a seal rubber.
4 is a recess, 4 is a cavity, 7 is an air circulation hole, 16 is an edge of the floor slab, and 13 is a gap.

Claims (1)

[Claims] 1. In the comb-shaped expansion joints provided at the ends of the opposing deck slabs, the upper and lower surfaces of the cross-sections having a length in the road width direction and perpendicular to the length direction have unevenness in the gap below the opposing face plates. It has a repeating bellows shape and has a cavity inside.
A bridge expansion joint characterized in that a seal rubber having an air vent hole provided at an arbitrary location is installed by removing air from the air vent hole in advance, bringing it into a contracted state, and using the expansion force to return to the original state from the contracted state. Drain type sealing device.