JPH0211442Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an expansion and contraction device for a road bridge.

(Prior art and its problems) In order to prevent distortion caused by expansion and contraction due to temperature changes, road bridges are provided with expansion and contraction gaps in the road, and comb-shaped sections made of cast steel or steel plates are installed to maintain the smoothness of the road surface. Expansion devices such as joints and lap joints are installed.

These telescoping devices are large and heavy;
It is necessary to carry out construction work from the subgrade section under the surface pavement, which is extremely troublesome to construct and repair.Also, it is difficult to stop water at the joints, so a separate drainage channel along the gap is required, and the construction work is difficult. Overall, it was a big deal.

This gap is designed with a standard ratio of 1mm to 1m of road length, so the width between the joints is usually about 50mm, and this gap can cause instant strong vibrations to the moving vehicle. There was an inconvenience in giving.

(Technical Problem) In order to solve this problem, the present invention aims to absorb vibrations and make it waterproof by connecting girders and joints of a road bridge with an elastic material.

(Technical means) In order to solve this technical problem, in this invention,
Reinforcing members are fixed to the road surface side corners of the left and right girder ends that form the expansion and contraction gap of the road bridge, and a construction member with a T-shaped cross section is suspended across both reinforcing members, and the reinforcement member and the construction member are suspended. At the contact part of the members, anti-vibration rubber is glued to one of the members, and the upper parts of the opposing left and right girder end faces are connected with an elastic sealant, and the legs of the construction member are embedded in this to connect the road end face and the construction member. The technical means was to glue the legs together.

(Operation of the technical means and effects of the invention) According to this technical means, since the expansion and contraction device is constituted by the reinforcing member at the corner of the end of the road girder and the T-shaped construction member suspended from the reinforcing member, The members of the expansion and contraction device can be made smaller, and as shown in the examples below, the expansion and contraction device does not extend to the subgrade but fits within the pavement thickness of the road surface, making construction work easier. It is not a large-scale project and is convenient for both construction and repair.

In addition, since the road surface side of the joint is made up of the reinforcing member at the end of the girder and the ceiling wall of the construction member with a T-shaped cross section suspended between them, the gap formed by the joint is It will be divided into left and right sides of the ceiling wall. Therefore, each gap is about half the width of the conventional one, and since vibration-proof rubber is interposed between the construction member and the reinforcing member, it softens the shock given to cars running on the road surface and reduces discomfort. I have nothing to give.

In addition, an elastic waterproof sealing material layer is formed between the end faces of the girder, and this adheres the legs of the construction member and the end face of the girder, making it possible to completely shut off water in the play area and prevent the reinforcing member from being exposed to the road surface. Rainwater, etc. that has entered between the roof wall and the ceiling wall of the construction member flows out to the road shoulder side along the sealing material, so there is no need to provide a separate drainage channel along the gap.

(Example) The drawing shows a longitudinal cross section of the expansion and contraction gap 1 of a road bridge.The road surfaces 6 and 7 at the left and right road girder ends 2 and 3 are formed by casting mortar or resin mortar. The corners are cut out to form a T-shaped cross section.

When forming the road surfaces 6, 7, the roadbeds 4, 5
An appropriate number of anchor bolts 8 and 9 are installed in the free space 1.
The anchor bolt groups 8 and 6 are connected by reinforcing reinforcing bars 10 and 11, respectively, and the anchor bars 12 and 13 are fixed, and their tips are attached to the lower surface of the L-shaped notch at the corner. If the road surfaces 6 and 7 and their corner portions are exposed, the road surfaces 6 and 7 and their corners can be strongly reinforced.

An L-shaped steel member is fixed in the L-shaped notch, and vibration-proof rubbers 16 and 17 are baked and bonded to the upper surface of the bottom wall thereof.

In the play area 1, both side edges of the ceiling wall 19 are placed on the anti-vibration rubbers 16 and 17, respectively, and the legs 20 are placed in the play area 1.
A steel construction member 18 having a T-shaped cross section is suspended inside the ceiling wall 19, and the ceiling wall 19 and the road surfaces 6 and 7 are substantially on the same plane.

Below the leg portion 20, a back-up material 21 made of foamed polyethylene is adhesively fixed between the girder end portions 4 and 5.
A waterproof elastic sealing material 22 is filled in the space formed by the lower surface of the ceiling wall 19 facing 0 and play area 1,
The girder end portions 4 and 5 and the leg portion 20 are bonded together.

When the telescoping device is configured in this way, an elastic sealant is interposed between the legs of the construction member and the end face of the girder and is adhered to both, so the construction member can be easily removed in response to temperature changes. This means that a sufficient water-stopping effect can be achieved without any problems.

[Brief explanation of the drawing]

The drawing shows an embodiment of the present invention, and is a longitudinal cross-sectional view of a gap in a road bridge. 1: Play space, 2, 3: Road girder end, 4, 5: Road bed, 14, 15: Erection member, 16, 17: Anti-vibration rubber, 18: Erection member, 22: Elastic sealing material.

Claims (1)

[Scope of utility model registration request] It consists of reinforcing members fixed to the road surface corners of the left and right girder ends that form the expansion and contraction gap of the road bridge, and an erection member with a T-shaped cross section suspended across both reinforcing members. At the contact part of the members, anti-vibration rubber is glued to one of the members, and the upper portions of the opposing left and right girder end faces are connected using an elastic sealant, and the legs of the construction member are embedded in this to connect the road end surface and the construction member. An expansion and contraction device for a road bridge, characterized in that the legs of the road bridge are bonded together.