JPS583845Y2 - Road joint expansion device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a road joint expansion and contraction device constructed at road joints such as bridges and elevated roads.

As an example of a conventionally used expansion and contraction device, there is a so-called finger joint in which a pair of steel comb-shaped plates are interlocked with a play gap, but rainwater leaking from the play gap is There was a problem with the falling onto Yangzi.

Conventionally, a gutter was installed between the opposing floor slabs to drain rainwater separately, but this gutter had the problem of accumulating dirt and sand, making it impossible to drain water smoothly.

In addition, in the above-mentioned finger joint, the running sound and vibration sound of vehicles passing through the road joint are easily transmitted to the toothpick through the gap, causing great noise pollution to residents living along the elevated road. It is requested that the problem be resolved as soon as possible.

In view of this, the present invention places a sealing plate under a pair of upper surface members installed at a road joint, and fills a flexible material in the groove-shaped expansion and contraction part at the center of the sealing plate to form a filling part. By this, water can be stopped at road joints, and by providing an elastic plate under the seal plate, the seal plate can be attached to the substantially horizontal mounting surface at the end of the floor slab and the substantially vertical end face of the floor slab. The present invention provides a road joint expansion/contraction device that prevents damage at corners, improves water-stopping properties and durability, and solves noise problems.

The configuration of the present invention will be explained with reference to the drawings in terms of embodiments.

Reference numeral 1 denotes the opposite ends of the concrete slabs at the road joint, in which the roots of the anchor bolts 2 are buried in advance, and the threaded portions 3 are cut out to protrude upward from the substantially horizontal mounting surface. Section 4 is provided.

An elastic sealing plate 5 made of rubber, synthetic resin, or the like is provided on the mounting surface of both notched stepped portions 4 with holes drilled in advance to fit into the threaded portions 3.
The mounting portions 5a on both sides and the elastic plate 6 are stacked vertically and inserted into the threaded portion 3 to abut against each other.

The sealing plate 5 has a groove-shaped expansion/contraction portion 5b formed in the center thereof.

On both side attachment parts 5a of the seal plate 5, one side of the band-shaped iron plate is made uneven and has a convex part 8 projecting in the bridge length direction, and the other side has a support part 10 with a stepped attachment hole 9. A pair of upper surface members 12 and 13 each having a groove 11 formed therein have a clearance between the recessed portion and the convex portion 8, and the convex portion 8 is connected to the groove-shaped expansion/contraction portion 7.
The threaded portion 3 of the anchor bolt 2 is projected upward from the stepped mounting hole 9.

The above-mentioned seal plate 5, elastic plates 6, 6, and rain top surface member 12゜13
This means that the threaded portion 3 of the anchor bolt 2 has a seat plate 14 made of synthetic resin such as synthetic rubber or polyurethane, and a washer 15. It is tightened using a nut 16.

The synthetic resin seat plate 14 and washer 15 have approximately the same diameter.

In some cases, the top end of the threaded portion 3 and the nut 16 are temporarily welded to prevent the nut from being pulled out.

Water leakage is prevented by the groove-shaped expansion/contraction portion 5b of the seal plate 5.
Moreover, the soundproofing effect under the road is also great, but the groove-shaped expansion and contraction part 5b
When a space is created on the top surface of a vehicle, the air in this space is frequently compressed and sucked in when a vehicle passes by, causing noise.

Therefore, in the present invention, before attaching the upper surface member 12.13, the space on the upper surface of the groove-shaped telescoping 5b is filled with liquid rubber and the flexible material filling portion 1f is attached to the sealing plate 5. Formed flush with the top surface of the section.

As shown in FIG. 4 as another embodiment, the filling section is made by filling the upper surface of the groove-shaped stretchable section 5b with a flexible foam material 18 such as polyurethane resin rubber, and pouring liquid rubber into the upper surface and solidifying it. A flexible surface layer 19 having a thickness of 5 to 15 mm may be formed.

In addition, the vertical wall 4a of the cutout step portion 4, the seal plate mounting portion 5a,
A slight gap is provided between the elastic plate 6 and the end surfaces of the upper surface members 12 and 13, and liquid rubber is poured into this gap and allowed to solidify, or a rubber plate is filled to form the joint 20.

Others 21 are distribution reinforcements, 22 are main reinforcements, and 23 are upper surface members 12
．． 13 in the road width direction Y.

In addition, in order to firmly attach the upper surface member 12.13 to the nut 16, it is necessary to apply a tightening force of approximately 30 kg.
It is desirable to set it to cm3 or more.

As the seat plate 14, Sunburen AT-2 manufactured by Sanyo Chemical Co., Ltd.
050 or Bumpex 305E manufactured by Nippon Reichhold Co., Ltd. is used.

The physical properties of each seat plate were measured and the results are shown in the table below.

The seat plate 14 is damaged by the nut 16 due to vibrations caused by passing vehicles, etc.
As a result, the entire road joint expansion/contraction device is prevented from loosening, improving the durability of the device, and the vibration noise caused by the loosening is also prevented.

As the seat plate, a seat plate 14a having a curved surface on one side as shown in FIG. 6, or a seat plate 14b having curved surfaces on both the upper and lower sides as shown in FIG. 7 may be used.

In the above structure, the seal plate 5 receives a large wheel load every time a vehicle passes by, but since the seal plate 5 is laid on the mounting surface of the notch step 4 via the elastic plate 6, the seal plate 5 receives a large wheel load every time a vehicle passes by. There is no risk that the seal plate 5 will be damaged at the corner formed by the mounting surface of the section 4 and the floor slab end surface 2a.

Therefore, according to the present invention, since the filling part is formed in the central groove-shaped expansion/contraction part of the seal plate, it is possible to improve water stoppage, and at the same time, vehicle running noise and vibration noise are attenuated or blocked by the filling part. Noise generation is suppressed, and the elasticity is good because no dirt or sand accumulates in the groove-shaped elastic parts.
Furthermore, since the convex part of the upper surface member protrudes above the filled part, the filled part is held down by the convex part, and peeling and swelling of the filled part are also prevented. Because of this provision, the seal plate is prevented from being damaged by wheel loads of passing vehicles, etc., and excellent effects such as high durability can be obtained.

[Brief explanation of drawings]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a plan view of a road joint, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. Figure 4 is a diagram of another embodiment of the part surrounded by the chain line circle in the center of Figure 2, Figure 5 is an enlarged view of the part surrounded by the left chain chain line circle in Figure 2, and Figures 6 and 7. Each figure is a longitudinal sectional view of the seat plate. 1... End of concrete slab, 2...
Anchor bolt, 4... Notch step, 5...
...Seal plate, 6...Elastic plate, 12.13...
...Top member, 17...Filled part, 18...
...Flexible foam material, 19...Flexible surface layer.

Claims (1)

[Scope of utility model registration request] Approximately horizontal mounting surfaces are formed at the ends of the concrete slabs facing each other with a clearance at the road joint, and elastic plates are placed on each of the mounting surfaces, and on both elastic plates, Mounting parts on both sides of a seal plate are placed on which the central groove-shaped expandable part and the mounting parts on both sides are connected, and on top of the seal plate, a pair of steel upper surface members have uneven parts on opposing parts. The elastic plate, the seal plate, and the upper surface member are arranged opposite to each other with a clearance between the concave portion and the convex portion, and the convex portion protrudes above the groove-shaped expansion/contraction portion, and the elastic plate, the seal plate, and the upper surface member are connected to the concrete floor slab. It is fastened with a tightening nut to an anchor bolt installed at the end, and the groove-shaped extensible part of the seal plate is filled with a flexible material to form a filling part flush with the upper surface of the mounting part. A road joint expansion and contraction device featuring: