JPS6020642Y2 - Road joint expansion device - Google Patents

Description

[Detailed description of the invention] This invention is designed to prevent the joint members of the road joint expansion and contraction device from being damaged by the blades of motor graders dispatched for road maintenance during snowfall. The present invention relates to a road joint expansion/contraction device provided with a road joint expansion/contraction device.

Conventional road joint expansion and contraction devices include a horizontal type using a horizontal substrate 11 of a joint member 5 as shown in FIGS. 1 and 2, and a wavy end type of a joint member 21 as shown in FIGS. 3 and 4. Face plate 2
There are two types: a vertical type in which the two are installed vertically and facing each other, and a hybrid type (not shown) which is an intermediate type between these two types.

Since the joint members of these road joint expansion and contraction devices are exposed to the road surface, they are often damaged by the blades of snowplows during snowfall, and this poses a major obstacle to road maintenance work during snowfall.

In order to overcome the above-mentioned obstacles, the inventor of this invention devised a road joint expansion and contraction device as shown in FIG. 7 and filed an application for utility model registration.

The invention of this earlier application connects the end of the floor slab through the seam gap a, b
are facing each other, and the end portions of this floor slab, b, have notched stepped portions C and c.
are arranged opposite to each other, support plates d and d are arranged opposite to each other, corrugated end plates e and e are respectively attached to the support plates, and both end plates e and e are U-shaped elastic rubber plates f. connected,
Furthermore, anchor bolts g9g are attached to both end face plates e and e...
The bridges, h... are fixed in the lateral direction, and at the upper end, the scratch prevention materials i, i... with a U-shaped cross section are spaced apart in the width direction from 300 to 50 orfr! The anchor bolts g9g... and h..., the scratch prevention material i, i... are fixed continuously with the notch step C.
It is consolidated by post-cast concrete j and j placed at 9C.

The others are the main reinforcement, 1 is the bottom plate, m is the anchor material, n is the flange, O is the main girder, p is the edge of the anti-scratch material, and g is the asphalt pavement.

In this structure, the asphalt pavement q is worn away by the passage of vehicles, and the edge p of the anti-scratch material is not easily worn out, so that steps are likely to occur in this part.

If snow removal is carried out when this level difference has occurred, the edge p of the anti-scratch material will be scratched by the blade of the snowplow, which will not only damage the blade but also damage the end plates e of the anti-scratch material 11. The containing joint member is destroyed.

Therefore, this type is unsuitable for areas with heavy snowfall.

In view of the above-mentioned conventional problems, this invention provides a pre-resistance material adjacent to and isolated from the corrugated end plate and other vertical, horizontal and hybrid type steel joint members. , the blade of the grader is provided so as to slide on the upper surface of the pre-resistance member to regulate the traveling height of the blade of the grader, thereby preventing the joint member from being damaged by the blade of the grader; The purpose is to solve the problems of the conventional technology.

Substantially, the upper surface of the intermediate part of the preresistance material is formed higher than its both ends, and the height of the upper surface of the preresistance material is higher than the height H of the upper surface of the metal part of the joint member, and the upper surface of the preresistance material is formed higher than the both ends thereof. The height of the upper surface is positioned to be the same or slightly lower, and the joint member and the pre-resistance material are disassociated from each other and are installed slightly separated from each other.

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

Example 1 This example is shown in FIGS. 1, 2, and 6 in the case where the joint member is horizontal.

Reference numeral 1 denotes a road joint expansion/contraction device, in which cutout steps 4, 4 are provided at the ends of floor slabs 3, 3 facing each other with a gap 2, and both cutout step portions 4,
4, a pair of horizontal joint members 5, 5 are installed opposite each other with a gap 6 between them. It is attached by applying nuts 9 and 10.

The joint member 5 has a protective layer 12 formed on the upper surface of a horizontal substrate 11.

The horizontal substrate 11 is made of a rigid metal plate such as steel or iron, and has a thickness of about 10 to 3 or Ian.

The protective layer 12 is made of a material that can be scraped off with a grader blade of a snowplow, such as synthetic resin such as epoxy resin, resin mortar, resin concrete, cement concrete rubber, or a material that can be worn away by the tires of a traveling vehicle. , the top surface is installed flush with the road surface or slightly lower than the road surface.

A series of seal plates 14 are sandwiched between the lower surface of the horizontal substrate 11 and the upper surface of the post-cast concrete 7.

Note that the opposing end surfaces 13 of the horizontal substrate 11 and the protective layer 12
In order to improve the running performance of the vehicle, the wavy shape was used, but the wavy shape may be formed on straight lines parallel to each other.

In order to prevent the horizontal substrate 11 from being damaged by the grader blade of a snowplow, the post-cast concrete 7 at the back of the joint member 5 is provided with a pre-resistive material 16 before the post-cast concrete 7 is placed.
16 is buried close to the joint member regardless of the joint member 5 and at a distance from the joint member.

The pre-resistance material 16 is a flat plate cut into a triangular shape with a through hole bored therein. The height gradually increases toward the center, and the outer end slopes downward from the center, so that the outer end is lower than the upper surface of the horizontal board, and is spaced at intervals of 200 to 1000 ra in the road width direction. They are connected by a connecting rod 17 inserted through the through hole.

In addition, 15 is a thread, and 18 is a pavement.

In construction, the protective layer 12 is fixed to the horizontal substrate 11 in advance at a place other than the construction site such as a factory to form the joint member 5, and the joint member is installed at the road joint at the construction site. Any method may be adopted in which the substrate 11 is installed first and the protective layer 12 is formed at the construction site.

Further, although the pre-resistive member 16 has a pentagonal shape, it may have a curved upper surface.

Embodiment 2 This embodiment is shown in FIGS. 3 to 5 in the case where the joint member is vertical.

Reference numeral 20 denotes a road joint expansion/contraction device with a cutout step 4 similar to that in Embodiment 1.
, 4.

Reference numeral 21 denotes a vertical joint member, in which corrugated end plates 22 22 are disposed intermeshingly with each other, and a sealing plate 23 having a U-shaped cross section is adhesively connected to the opposing surfaces in a corrugated manner. in,
It is installed in the cutout steps 4, 4, and its lower ends are fixed to the upper ends of flat vertical support plates 24 and 24, respectively, and the vertical support plates are connected to the horizontal support plates 25 and 25, and the horizontal support plates are connected to the main girders. installed on each.

The corrugated end plates 22, 22 are connected to lateral anchors 26, 26, and main bars 27, 27 and dowel bars 28, 28 are connected to the lateral anchors.
8, 28, etc. are connected to distribution bars 29°29 as appropriate.

By pouring post-cast concrete 7 into the cutout steps 4, 4, the various reinforcing bars are fixed, and the joint member 2
1.21 is also fixed.

Note that 36 is a bottom plate, and 37 is a main girder.

Also in this example, pre-resistive members 30 and 30 are installed before pouring concrete 7.

The pre-resistance material 30 has triangular plates 32 vertically connected to the lower surface of a square plate 31, and both ends 3 of the square plate 31 in the bridge length direction
3 is bent slightly downward, and a connecting rod 34 is inserted through a hole drilled in the triangular plate 32 to connect the triangular plate 32.

When installing the front resistance material 30, the height of the top surface of the rectangular plate 31 should be adjusted in advance so that it matches the road surface 19, or the height of the top surface of the square plate 31 should be adjusted in advance so that it matches the road surface 19. Place and install it.

Further, the upper end of the corrugated end plate 22 is set at a height H that is slightly lower than the height of the road surface.

As a result, the upper surface of the rectangular plate of the preresistance member 30 can be positioned higher than the height H, and both ends thereof can be positioned at the same level or lower.

As in the first embodiment, the pre-resistance material 30 is installed close to and isolated from the joint member 21 without being continuous with the joint member 21, and is installed in locations other than the positions indicated by solid lines in FIG. The position of the preresistance material 30 shown by the chain line may be the same, or the shape can be changed, and a simple polygonal preresistance material 35 may be buried as shown in FIG. 5 as in the first embodiment.

It goes without saying that the wave-shaped end plates 22, 22 may be formed by making the waveform into a straight line and having flat plates arranged in parallel as described in the first embodiment.

Incidentally, the present invention provides a steel bridge in which the deck slab 3 is formed on the steel girder.
The present invention can also be applied to C-girder bridges, concrete girder bridges, and steel deck bridges in the same manner as in Examples 1 and 2 above.

Moreover, it is different from what was illustrated in Examples 1 and 2.

The present invention can also be applied to horizontal, vertical, and vertical/horizontal hybrid shapes.

Since the present invention has the above-mentioned configuration, as shown in FIG. Even if the front resistor material 16 slides in contact with the upper surface of the resistor material 16, it advances over the protective layer 12 and does not directly hit the horizontal substrate 11, so damage to the horizontal substrate 11 is prevented and the protective layer 12 Even if it is determined by a grader, it can be easily repaired using an epoxy resin or the like that constitutes the protective layer.

Further, even if the protective layer 12 and the post-cast concrete 7 are worn out, the grader blade passes over the pre-resistive material 16, so the horizontal substrate 11 is not determined.
There is no need for any major shock to occur.

The same applies to the actions and effects of Example 2.

[Brief explanation of the drawing]

1, 2 and 6 show a first embodiment of the road joint expansion and contraction device of the present invention, FIG. 1 is a sectional view taken along the line I-I in FIG. 2, and FIG. 2 is a plan view on the same side. , FIG. 6 is an explanatory diagram of the usage state based on FIG. 1, FIGS. 3 to 5 show the second embodiment, FIG. 3 is a plan view of the same, and FIG. 4 is an illustration of IV-I in FIG.
5 is a sectional view taken along lines (V) and (V) in FIG. 3, and FIG. 7 is a partially sectional perspective view of a conventional road joint expansion/contraction device. 1...Road joint expansion/contraction device, 3...Floor plate, 4...Notch step, 5...Joint member,
7...Post-cast concrete, 11...Horizontal substrate, 12...Protective layer, 14...Seal plate, 16...Prefix Resistance material, 17...
Connecting reinforcement, 18... Pavement, 20... Road joint expansion/contraction device, 21... Joint member, 22...
... Wave-shaped end plate 23 ... Seal plate, 30.
・・・・・・Pre-resistance material, 31 ・・・・Square plate, 32
... Triangular plate, 33 ... Both ends, 34.
...Connection bar, 35...Pre-resistance material.

Claims (5)

[Scope of utility model registration request] (1) A pair of joint members are installed oppositely at the ends of the floor slab facing each other through a joint gap, and a grader blade of a snowplow slides on the upper surface of the joint member, close to and separated from the joint member. A metal pre-resistance material that regulates the running height of the blade of the grader is buried in the concrete floor slab, and the pre-resistance material A road joint expansion/contraction device characterized in that the upper surface of the middle part is high and the upper surfaces of both end parts are positioned at the same level or lower. (2) The road joint expansion and contraction device according to claim 1, wherein the joint member is horizontal, and the upper surface of the pre-resistive member is buried in the slab concrete. (3) The road joint expansion/contraction device according to claim 1, wherein the joint member is horizontal, and the upper surface of the pre-resistive member is flush with the road surface. (4) The road joint expansion/contraction device according to claim 1, wherein the joint member is vertical, and the upper surface of the pre-resistive member is flush with the road surface. (5) The road joint expansion and contraction device according to claim 1, wherein the joint member is vertical, and the upper surface of the pre-resistive member is buried in the slab concrete.