JPS5835686Y2 - Road joint expansion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a road joint expansion/contraction device in which corrugated opposing end surfaces that mesh with each other with a meshing gap are formed at the road joint.

One of the road joint expansion and contraction devices that is widely used in road bridges such as bridge roads and elevated roads is a device in which a pair of tooth profile plates whose upper surfaces are approximately aligned with the road surface height are engaged with each other with a meshing clearance. There is something.

This tooth-shaped plate has a rectangular base with tooth-shaped protrusions projecting from it at regular intervals.The base is fixed onto the floor slab, and the tooth-shaped protrusions protrude horizontally from the edge of the floor slab. However, there are disadvantages in that it is difficult to install the formwork during construction, noise is generated as vehicles pass by, and durability is poor.

In other words, since this toothed plate has no support under the toothed protrusion, it vibrates up and down when a vehicle passes, generating loud noise. At the same time, it is subjected to a large bending moment, which can cause damage or damage to the base. It may separate from the floor slab.

In view of these points, the present invention has been developed by forming a concrete layer under the tooth profile plate with the end surface substantially flush with the tooth profile plate, thereby improving workability of formwork, etc., excellent durability, and noise reduction. An object of the present invention is to provide a road joint expansion/contraction device that does not cause the occurrence of.

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

Reference numeral 1 denotes a road joint expansion/contraction device, which includes a pair of tooth profile plates 2, 2 whose upper surfaces are substantially aligned with the road surface height, and a lower concrete layer 3, 3 whose end surfaces are substantially flush with the tooth profile plates. These form opposing end surfaces that mesh with each other with a meshing play 5 between them.

The tooth-shaped plate 2 has tooth-shaped protrusions 7° 7 protruding from a rectangular base 6 extending in the road width direction at regular intervals in the longitudinal direction, and stepped holes 8 bored in the base 6. An anchor bolt 10 is attached to.

11a. 11b is a nut for attaching the anchor bolt 10 to the base 6.

The lower concrete layer 3 is formed of one concrete layer from the bottom surface of the notched step 13 formed at the end of the floor slab 12 to the lower surface of the tooth profile plate 2, and extends to the concrete base 14 continuous with the floor slab 12. A concrete protrusion 15 having the same shape as the tooth-shaped protrusion 7 is formed.

The tooth profile plates 2, 2 do not need to be completely aligned with the road surface height, and may be installed slightly lower than the road surface height.

Furthermore, the end surfaces of the toothed plate 2 and the lower concrete layer 3 do not necessarily have to be completely flush, and even if either the toothed plate 2 or the lower concrete layer 3 protrudes slightly from the other, It is sufficient if they are substantially the same.

Reference numeral 16 denotes a gutter body used as a water stop means, which is supported by gutter body supports 17 arranged at regular intervals in the road width direction.

The gutter body support is bent along the outer shape of the gutter body 16, and the flanges 18a and 18b at both ends are connected to the main girder 19.
It is fixed to the lower flange 21.21 of No. 19 with mounting bolts 22 and mounting nuts 23.

One flange 18a of this gutter support 17 has a long hole 2.
4 is bored, and a mounting bolt 22 is provided so as to freely move within the elongated hole in accordance with the expansion and contraction of the road bridge.

In the figure, 25 is a distribution bar, 26 is a reinforcing bar, 27 is a support bar, and 28 is a pavement.

Next, an example of a construction method for the road joint expansion/contraction device 1 will be explained.

A bottom mold plate is installed in advance at the lower part of the floor slab gap, and support bars 27 are arranged to form cutout steps 13 and 13 at opposite ends of the floor slabs 12, 12.
Form it.

Next, the pair of tooth profile plates 2, 2 to which the anchor bolts 10 are attached are set so that the upper surfaces thereof almost match the height of the road surface, and the tooth profile protrusions 7 are engaged with each other with a predetermined engagement clearance 5. , the respective contact points between the anchor pole 1-10 and the reinforcing bars 26, distribution bars 25 and 27 are welded and fixed.

After that, a corrugated formwork 29 made of foamed plastic as shown in Fig. 3 is temporarily installed on the bottom formwork, and concrete is poured under the toothed plate 2 to make the end surface flush with the toothed plate 2. A lower concrete layer 3 is formed and the formwork is removed.

Subsequently, the gutter body 16 and the gutter body support 17 are attached to the main girder 19.1.
9 to complete the road joint expansion and contraction device 1.

If the bottom formwork is difficult to remove, it may be left behind, so it is preferably formed of a flexible plate such as a foamed plastic plate or a rubber plate.

Further, as the corrugated formwork, a structure in which two corrugated plates 30 and 31 are disposed opposite each other as shown in FIG. 4 may be applied.

Note that the lower concrete layer 3 is formed by forming a notch step in the slabs 12, 12 with the top surface of the main girder 19 as the bottom surface, and pouring concrete from the top surface of the main girder 19 to the bottom surface of the tooth profile plate 2. It is also possible to form a thick layer.

Further, the road joint expansion and contraction device 1 is constructed on a concrete slab bridge in which a concrete deck slab 12 is formed on the main girder 19, but the road joint expansion and contraction device of the present invention uses tension steel materials. PC (prestressed concrete) girder bridges are buried in concrete, and RC (reinforced concrete) is used to bury reinforcing bars in concrete during on-site construction.
It can also be applied to concrete) girder bridges.

In these PC girder bridges and RC girder bridges, cutout steps are formed at the upper part of the girder ends (20 girders are formed during construction, and RC girders are cut out on site by box cutting, etc.), and the road is cut out using the same method as in the above example. Build a seam expansion device.

Further, in the above embodiment, a gutter body is used as a stop level, but water stop means as shown in FIGS. 5 to 8 described below may also be used.

The water stop means shown in FIG.
, 3 in the form of a bridge, and the tooth-shaped plates 2, 2 are fixed thereon, and the seal plate has a downwardly bent extendable part 33a in the center, and the extendable part extends between the meshing gaps. It is bent into a wave shape along the

The seal plate 32a functions to stop water and also functions as a cushion to reduce vibrations when a vehicle passes by.

This seal plate 32a can be made by bending a flat elastic plate into a wave shape along the meshing gap at the construction site, but it is possible to form the seal plate 32a in advance in a factory so that the expandable part is located between the meshing gaps. Good too.

The water stop means shown in FIG. 6 is similar to the water stop means shown in FIG. A sealing plate 32b is attached, and an extensible portion 33b of the sealing plate 32b is formed substantially linearly in the road width direction.

The water stop means shown in FIG. 7 has an elastic member 34 bent in a substantially U-shaped cross section interposed in the meshing gap 5, and both sides of the elastic member 34 are fixed to the end surfaces of the toothed plates 2, 2. has been done.

In addition, the water stop means shown in FIG. 8 has a back-up material 35 interposed in the meshing gap 5 with both sides closely contacting the end surface of the lower concrete layer 3, and a filling rubber material 36 is placed on top of the back-up material 35. It is filled.

With the above configuration, the present invention enables the toothed plate to be supported by the lower concrete layer whose end surfaces are substantially flush with the toothed plate, which eliminates the vibration of the toothed plate that occurs in conventional devices when a vehicle passes by. This has the excellent effect of preventing the generation of noise and significantly improving durability.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings illustrate embodiments of the present invention, and FIG. 1 is a plan view of the road joint expansion and contraction device, FIG. 2 is a sectional view taken along line III in FIG. 1, and FIG. 3 is a waveform diagram. FIG. 4 is a perspective view of another example of the corrugated form, and FIGS. 5 to 8 are sectional views showing other examples of the water stop means. 1...Road joint expansion/contraction device, 2...Tooth plate, 3...Lower concrete layer, 5...
・Interlocking space, 12...Floor slab, ]9...
Main digit.

Claims (1)

[Scope of utility model registration request] In a road joint expansion/contraction device in which opposing end surfaces of corrugated shapes that mesh with each other with a meshing gap are formed at the road joint portion, the opposing end surfaces have a tooth-shaped plate whose upper surface substantially matches the height of the road surface;
A road joint expansion/contraction device characterized in that it is formed by the toothed plate and a lower concrete layer whose end surfaces are substantially flush with each other.