JP2008025320A - Multilayer structure type expansion device for road bridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion device for a road bridge formed in multilayer structure to improve the restricted functions of an expansion device of monolayer structure, which improves traveling performance, cut-off performance, durability and replacing performance by a surface layer horizontal corrugated expansion device, also considerably improves strength and durability by a lower layer vertical steel-made load support type corrugated expansion device, and is applicable to a large girder expansion gap which the constraint of the conventional expansion device. <P>SOLUTION: The expansion device for the road bridge is formed in a corrugated shape (tooth shape or comb shape) and provided with excellent functions of multilayer structure, wherein the surface layer horizontal corrugated expansion device 1 has the functions of traveling performance, cut-off property, durability, workability and replacing performance, and the lower layer vertical steel-made load support type corrugated expansion device 12 considerably improves strength and durability and is applicable to the large girder expansion gap (a joint expansion gap). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is constructed at a joint portion between floor slabs constituting a road surface such as a road bridge and a viaduct, and without causing a step in the joint portion, water leakage, vibration and noise at the time of traveling of the vehicle from the joint portion. The present invention relates to a telescopic device for road bridge that can prevent the occurrence as much as possible, and belongs to the technical field of civil engineering construction.

  In order to absorb the expansion and contraction of the floor slab due to the outside temperature, the expansion device for the road bridge is arranged at the joint between the floor slabs forming road surfaces such as road bridges and viaducts. The difference in level is not only a source of noise generated by vehicles traveling on the road surface, but also causes the traveling vehicle to vibrate, not only causing discomfort to the driver and passengers riding the vehicle, Since damage to the seam portion and water leakage are caused, various expansion devices for road bridges have been developed and proposed for smooth vehicle operation without causing a step in the seam portion.

  There are many forms of such a road bridge expansion / contraction device, but most conventional expansion / contraction devices are single-layer expansion / contraction devices.

  Most conventional expansion devices have a single-layer structure, and one type of expansion / contraction device is attached to one expansion / contraction part. Therefore, there is a problem that the function of the single-layer expansion device is restricted.

  Most of the conventional expansion and contraction devices for road bridges have a single-layer structure, and the horizontal expansion and contraction device is excellent in running performance, water stoppage, replaceability, etc. among the functions required for the expansion and contraction device, but it is noise and durable. The vertical steel device is superior to the horizontal telescopic device in terms of noise prevention, durability, workability, and wide playability. It was an issue to solve the problems of both structures.

In view of the present situation of the expansion device having such a single layer structure, the invention according to claim 1 is an expansion / contraction that complements the advantages of both structures by adopting a multi-layer structure for the corrugated (toothed or comb-shaped) expansion device. It is an object of the present invention to provide a road bridge expansion / contraction device that is excellent in traveling performance, water-stopping, noiseless, durable, easy to install, replaceable, and applicable to wide play.

The invention described in claim 2
The expansion device for a road bridge according to claim 1,
2. The expansion device for a road bridge according to claim 1, wherein a surface portion of the surface horizontal expansion device of the expansion device is a rubber-like elastic body.

  The expansion device for road bridge according to the present invention has a structure in which the width of the surface horizontal corrugated expansion device is narrowed, flat construction is easy, noise-free, drastically improved running performance and water stoppage, and replacement is easy. Telescopic device.

  In addition, according to the present invention, an extremely superior expansion and contraction device which can be applied to a wide girder and a significant improvement in strength and durability by means of a vertical corrugated (toothed or comb-shaped) steel load-supporting expansion and contraction device. Is made possible.

  Hereinafter, although one Example of the expansion-contraction apparatus for road bridges of this invention is described in detail based on drawing, this invention can add various improvement in the range which does not change the summary.

  FIG. 1 is a schematic sectional view of a standard type of a road bridge extension device according to the present invention, FIG. 2 is a perspective view, and FIG. 3 is an explanatory view showing a schematic perspective view of a road bridge extension device according to the invention of claim 2. It is.

  As is apparent from FIG. 1, the surface horizontal expansion / contraction device according to the present invention is a road bridge expansion / contraction device in which 1, 2, and 3 are formed as a single body. The vertical steel corrugated load-supporting expansion / contraction device in the lower layer has a structure in which the anchor bolt 5 and the nut 6 are installed at predetermined positions by adjusting the height of the pavement 8 and the height of the pavement 8 integrally with the surface horizontal expansion / contraction device using an attachment jig. The hole 7 is filled with a hole filling material at the site after installation to close the hole.

  On the other hand, FIG. 2 shows an explanatory diagram in which a floor slab reinforced with concrete or the like with anchor bolts embedded at regular intervals or a box opening portion of an abutment according to the invention of claim 2 has a corrugated structure (tooth shape or comb shape). The lower vertical steel load-supporting expansion and contraction device 12 having a corrugated structure (tooth shape or comb shape), the reinforcing steel bar 11 and the anchor bolt 5 are installed and then fixed by the concrete anchor 10 and the shape of the post-casting material 13 is placed. It has a corrugated structure (tooth shape or comb shape).

  FIG. 3 shows an anchor bolt by adjusting the height of a horizontal horizontal expansion / contraction device having 1, 2, 3 as a single molded product on a post-casting material 13 having a corrugated structure and a pavement 8 by a non-land adjustment member 4. It is explanatory drawing installed in the predetermined position with 5 and the nut 6. FIG. The hole 7 is filled with a hole filling material at the site after installation to close the hole.

Schematic sectional view of a standard type of a telescopic device for a road bridge according to the present invention Schematic perspective view in which the floor slab has a corrugated structure (tooth shape or comb shape) in order to install the surface horizontal type stretching device according to the present invention. Explanatory drawing which shows the state which has arrange | positioned the lower layer type vertical steel load support type corrugated expansion-contraction apparatus and surface layer horizontal corrugated expansion-contraction apparatus concerning this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stretch member of horizontal surface type expansion / contraction device 2 Surface layer type corrugated expansion / contraction device body 3 Fixing bottom plate 4 Non-land surface adjustment member 5 Anchor bolt 6 Nut 7 Hole 8 Pavement 9 Floor slab 10 Concrete anchor 11 Reinforcing bar 12 Lower layer vertical steel load support Mold corrugated expansion and contraction device 13

Claims (2)

  It is composed of a horizontal horizontal expansion / contraction device with a corrugated shape (tooth shape or comb shape) and a plurality of vertical steel load-supporting corrugated shapes (tooth shape or comb shape) that support the wheel load received by the horizontal wave expansion / contraction device. Expansion device for multi-layered road bridges.   The road bridge expansion / contraction apparatus according to claim 1, wherein the surface layer horizontal wave expansion / contraction apparatus comprises a rubber elastic body or a rubber elastic body on the surface and a bottom steel plate.

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