JPS583082B2 - Road joint expansion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telescoping device constructed at a road joint of an elevated road or a bridge.

Conventional steel telescoping devices generally have gaps to absorb the expansion and contraction of the road, while telescoping devices made of rubber are generally provided with recesses, which absorb vibrations when car wheels pass through these gaps or recesses. Furthermore, in the case of a device with the above-mentioned air gap, a harsh clanging noise is transmitted to the underpass through the air gap, and in a slightly damaged device, a high noise of 8 to 90 dB (A) is generated, and the vehicle driver is However, I could not get rid of the discomfort caused by the vibrations.

In addition, construction requires many labors and advanced techniques, and reinforcement of the edge of the slab is also required.Furthermore, in paving work, paving is usually done after expansion joints, so the pavement is Since each joint has to be separated, continuous pouring is not possible, resulting in low work efficiency and difficulty in leveling the road surface.

On the other hand, for example, as described in Japanese Utility Model Publication No. 43-8900, there are bridge plates built on opposing deck slabs and paved on top of the bridge plates. There is a risk that the pavement will be lifted due to vertical vibration or other effects, leading to cracking or peeling of the pavement.

In view of the above, the present invention connects the bridge board and the lifting prevention board disposed below the play area using a connecting rod, thereby preventing the bridge board from lifting up and preventing the movement of the connecting rod from reaching the edge of the deck slab. The purpose of the present invention is to provide a road joint expansion/contraction device that takes advantage of this restriction to prevent large displacement movements of bridge decks.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below based on embodiments with reference to the drawings.

Reference numeral 1 denotes a road joint expansion/contraction device, in which a plurality of bridge plates 4a are installed in line in the road width direction on the upper surfaces of end portions of deck slabs 3, 3 facing each other across a gap 2 at a joint portion of a road bridge. A joint pavement 5 is poured over the entire surface of the board 4a.

If necessary, a connecting rod 6 is installed from the center of the bridge board 4a as shown in the figure and extends below the floor slab 3 through the play space 2, and a lifting prevention plate 7 is inserted into the lower end of the connecting rod 6 and secured with a nut. Screwed down.

8 is a pin, 9 is a road side wall or railing, 10 is a center line, 11 is a side line, and 12 is a vehicle.

In the example, the bridge board 4a has a length of about 2 m in the bridge length direction, and its length is determined as appropriate in consideration of the required weight, strength, etc., and the upper surface is at the center. The bridge has a shape with a downwardly sloping taper toward both ends in the bridge length direction and a sharp tip.

The bridge trestle boards 4a in the roadway section have a width of about 1 m and are connected by horizontal reinforcements 13 in order to facilitate transportation and improve workability.

Reference numeral 14 indicates a horizontal tension hole, which is fitted into the bridge plate 4b of the side band portion after the bridge plate 4a of the roadway portion is connected.

It is better to connect the bridge boards not only by the horizontal members 13 but also by providing recesses and protrusions that fit into each other because the flatness of the bridge boards can be maintained. Joints 15 are provided at both ends of the bridge boards 4a and 4b. , 15 are provided.

That is, on the deck slabs 3, 3 on both sides of the bridge bridge boards 4a, 4b, the slab upper surface pavement 17.17 is placed with a joint 15.15 between it and the joint pavement 5. .

An elastic filler 16 such as bronze asphalt or tar is injected into the joints 15, 15.

The joint pavement 5 is usually about 5 to 8 cm and has an inner base layer of 3 to 5 cm.
cm, and the surface layer is about 2 to 3 cm.

In the play area 2, the bridge plates 4a. Since the thickness of the bridge board 4b is the maximum, the pavement thickness will be 2 to 5 cm, but by making the upper surface of the bridge boards 4a and 4b rough and paving with adhesive,
Sufficient pavement strength will be maintained.

The connecting rod 6 has a flat cross-sectional shape as shown in FIG. 3 so as not to inhibit the expansion and contraction of the floor slab 3.

In addition, both ends of the surface of the anti-lifting plate 7 in contact with the floor slab 3 are rounded as shown in FIG. 2, and this roundness prevents damage to the floor slab 3 that moves separately on the left and right sides.

With the above structure, the floor slab 3 is connected to its upper surface and the bridge boards 4a, 4.
It can freely expand and contract by sliding with the lower surface of b, and this expansion and contraction is indirectly absorbed by the filling material 16 of the joint 15.

Therefore, in the past, the expansion and contraction of the deck slab 3 was absorbed at one location at the road joint, but in the present invention, it is absorbed at two joints 15 and 15 at both ends of the bridge bridge boards 4a and 4b. For example, when the conventional device requires a gap of 5 cIrL, the width of the joint 15 of the present invention is sufficient to be 2 to 3 cm, and the filler material 16 provides a flat road surface, so vehicle running performance is greatly improved.

Since the deck slab 3 and the bridge plates 4a and 4b are not bonded, there is a risk that the bridge plates 4a and 4b will pop out. By joining each bridge board 4a, and further providing the connecting rod 6, anti-lifting plate 7, nut and pin 8, the bridge boards 4a and 4b will not be lifted or protruded. , 4b are tapered, so there is little resistance when the floor slab 3 expands and contracts, and each bridge board 4a, 4b has a length of about 2 m and a width of 1 m.
It is easy to transport because it is about the same size as the bridge board 4a,
4b widely covers the upper surface of the end portion of the floor slab 3, so the load-bearing strength of the road joint portion is large.

In addition, the pavement 5 has good workability because continuous pouring can be performed at road joints.

As described above, according to the present invention, in addition, the lifting prevention plate and the connecting rod prevent the bridge plate from lifting or large displacement, so damage to the pavement is prevented and the pavement remains in good condition for a long period of time. Vehicle drivability is maintained, and there are no openings or depressions on the road surface at road joints, resulting in good vehicular drivability.
Traffic pollution such as vibration and noise is prevented, and the pavement can be laid continuously, providing excellent workability.

[Brief explanation of drawings]

The drawings illustrate embodiments of the present invention; FIG. 1 is a partially cutaway plan view of a road joint; FIG. 2 is an enlarged sectional view taken along line A-A in FIG. 1; and FIG. It is a sectional view taken along the line BB in the figure. DESCRIPTION OF SYMBOLS 1... Road joint expansion/contraction device, 2... Play space, 3... Curved slab, 4a, 4b... Bridge plate, 5...
...Joint paving, 6...Connecting rod, 7...
... Lifting prevention plate, 13 ... Horizontal reinforcement material, 15
...... joint, 16... filler, 17...
...Paving of the upper surface of the floor slab.

Claims (1)

[Scope of Claims] 1. A bridge board is constructed on the upper surface of the end of the deck slabs facing each other across a gap at a joint portion of a road bridge, while straddling the gap, and below the gap is a bridge plate of both deck slabs. A lifting prevention plate that engages with the lower surface of the end is provided, and the lifting prevention plate and the bridge board are connected by a connecting rod, and the joint part paving and the top surface of the deck slab are paved on the bridge board and the deck slab, respectively. A road joint expansion/contraction device characterized in that: 2. The road joint expansion/contraction device according to claim 1, wherein the upper surface of the bridge bridge plate is tapered downward from the center toward both ends in the most direction of the bridge.