JP2008025324A - Expansion device with tapered load-supporting plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion device for a highway bridge capable of being constructed in small sizes with excellent construction work performance even if the expansion movement and the expansion spacing are large, and excellent in traveling performance, nonslip performance, anti-noise performance, cutoff performance, durability and the like. <P>SOLUTION: A load-supporting plate 2 for supporting the weight of a rubber-like elastic body 1 for expansion is formed in a tapered shape. One or a plurality of spaces 7 are provided for absorbing a large expansion. In the case of a large deck slab spacing, a load-supporting plate of a flat plate shape or a circular, recessed or projected shape or other shapes is provided in the center of the bottom of the expansion device for reducing sizes. By employing the above construction, a large expansion movement can be absorbed, and the expansion device can be applied to a large deck slab spacing. Smooth traveling performance, anti-noise performance, nonslip performance, high cutoff performance, long durability, feasibility of construction and other functions are drastically improved. <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, generation of vibration and noise during vehicle running from the joint portion The present invention relates to a road bridge expansion / contraction device (hereinafter referred to as “extension device”) that can prevent as much as possible, and belongs to the technical field of civil engineering construction.

  The seam part of each floor slab that forms the road surface such as a road bridge is equipped with a telescopic device to absorb the expansion and contraction of the floor slab due to outside air temperature, but the step formed by the seam part runs on the road surface Not only will this be a source of noise generated by the vehicle, but it will also cause the traveling vehicle to vibrate, which not only causes discomfort to the driver and passengers in the vehicle, but also smoothes the operation of the vehicle. Various expansion and contraction devices have been developed and proposed.

  There are many types of such expansion / contraction devices, but most of the expansion / contraction devices have a load support plate provided at the center of the expansion / contraction joint and horizontally above the expansion / contraction device. On the other hand, a load support plate is provided horizontally at the upper center of the expansion joint, and the fixed bottom plate that supports the load of the horizontal load support plate is inclined (tapered). Rather, the load supporting plate is inclined (tapered) in order to prevent voids when filling the post-cast concrete for fixing the expansion device.

  Since the conventional stretching device is provided with the load support plate horizontally on the upper surface thereof, the width of the stretching device is drastically increased in order to be applied to the predetermined stretching amount and the width between the floor slabs. Etc. are also increased in proportion, so that it has been a problem to solve problems such as noise generation, slip generation, seam leakage, and durability.

  Conventional expansion and contraction devices for vertical joints are provided with a load support plate horizontally on the upper surface, so that the load support plate becomes a load support in line contact when a level difference occurs, and is easily damaged, causing problems such as noise generation and traffic accidents. .

  The conventional sidewalk expansion / contraction device is provided with a load support plate horizontally on the top surface, so when applied to a sidewalk, the surface groove for absorption of expansion / contraction is large, and it is not suitable for falls of women, elderly people, infant pedestrians etc There were also problems such as occurrence.

  In addition, the conventional expansion / contraction device is applied to a large expansion / contraction amount and a wide floor slab play width, because the thickness, weight, etc. increase in proportion to the expansion / contraction amount, floor slab play width, There was a problem in transportation, construction, etc., and its solution was also an issue.

  The invention according to claim 1 eliminates the support plate at the center upper surface of the expansion joint of the expansion / contraction device, and forms a taper (inclination) shape from the horizontal shape to the expansion / contraction device (horizontal, vertical, oblique, (Upward and downward directions) can be taken widely, and it can be applied to the wide play of the expansion joint (floor slab part), and the necessary functions of the expansion and contraction device are noise prevention, running performance, water stoppage, durability, workability, etc. It provides a greatly improved telescopic device.

  According to a second aspect of the present invention, in order to further increase the amount of expansion / contraction of the expansion / contraction device, one or a plurality of voids for expansion / contraction absorption are provided in the elastic elastic body for expansion / contraction absorption. apparatus.

  According to the invention of claim 3, in order to further increase the amount of expansion / contraction of the expansion / contraction device and at the same time be applicable to a wide floor slab play, a load support plate and The expansion / contraction apparatus according to claim 2, wherein a load supporting plate of each type such as horizontal, circular, convex, and concave is provided at regular intervals.

  In the expansion and contraction device according to the present invention, the expansion and contraction absorbing material is a rubber-like elastic body, and the rubber-like elastic body is structured to receive the load of the wheel. Since such a load is directly received by the inclined load plate, it is excellent in noise generation prevention, running performance, water stoppage, durability, etc., and its structure is simple, so the construction process is short and no special jigs / tools are required. It is an excellent telescopic device that is easy to construct.

  In particular, the expansion / contraction apparatus according to the present invention can provide an expansion / contraction apparatus capable of absorbing a large expansion / contraction amount by providing one or a plurality of voids for expansion / contraction absorption in the rubber-like elastic body of the expansion / contraction absorbent material.

  In addition, the telescopic device according to the present invention provides a telescopic device that can absorb a large amount of expansion and contraction and can be applied to a wide floor slab by providing a load support plate at the center bottom of the telescopic device. To do.

  In addition, the conventional vertical joint expansion and contraction device suffers from frequent occurrences of breakage, noise, traffic accidents, water leakage, etc., because the horizontal load support plate receives the load at the line contact surface when a step occurs between the old and new floor slabs. The point was pointed out. In the expansion / contraction device according to the present invention, the vehicle running surface of the expansion / contraction device is formed of a rubber elastic body for absorbing expansion / contraction, and the inclined load support plate is provided at the bottom of the expansion / contraction device. The vehicle travel surface has a tapered shape at the level difference, and is suitable for absorbing the level difference during vehicle travel, providing an extension device that is easy to construct and excellent in long-term durability and high waterstop.

  In addition, when the conventional extension device for a sidewalk requires a large amount of expansion and contraction and a large floor slab, the load support plate of the extension device is provided horizontally on the upper surface, and a very large extension groove is required. There was a problem that a fall accident of a pedestrian's groove occurred. The expansion / contraction device of the present invention absorbs a large amount of expansion / contraction by providing one or more voids for expansion / contraction absorption in the elastic elastic body for absorption / contraction, and by providing a load support plate in the gap between the central bottom of the expansion / contraction device. In addition, it is possible to cope with a wide floor slab play, and there is no need for a large groove.

  The expansion / contraction device according to the present invention can absorb a large amount of expansion / contraction, floor slab clearance, and step difference with a relatively small width, thickness and weight, and further can prevent slipping with a small groove and satisfy a necessary function. The present invention also provides an excellent telescopic device that greatly improves the conventional telescopic device in manufacturing, transportation, and construction.

  Hereinafter, embodiments of the telescopic device of the present invention will be described in more detail with reference to the drawings. However, the present invention can be variously improved without departing from the scope of the present invention.

    1 is a schematic cross-sectional view of an expansion / contraction apparatus according to the present invention, FIG. 2 is a schematic cross-sectional view of claim 2 provided with a space for absorption of expansion / contraction, and FIG. 3 is a load support plate provided at the center bottom of the expansion / contraction joint. FIG. 4 is an explanatory view showing an embodiment of claim 3.

    As is apparent from FIGS. 1, 2, and 3, the telescopic device according to the present invention is a telescopic device in which reference numerals 1, 2, 3, 4, 6, 7, and 8 are integrally molded. In addition, as shown in FIG. 4, this expansion / contraction device is installed according to the pavement height using an attachment jig, fixed to the anchor bolt 5 and the floor slab reinforcement 10, 11, 12 etc. by welding or the like, and then attached to both sides of the expansion / contraction device. This is a structure in which cast concrete 9 is placed.

Schematic sectional view of the telescopic device according to the invention of claim 1 A schematic cross-sectional view of an expansion / contraction apparatus according to the invention of claim 2 provided with an expansion / contraction absorption gap. Sectional drawing of the expansion-contraction apparatus which provided the load supporting plate in the expansion-contraction joint center bottom part by the expansion-contraction apparatus which concerns on invention of Claim 3. "Mounting section" when the telescopic device according to the invention of claim 3 is mounted on a bridge slab

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rubber-like elastic body 2 Inclined load support plate 3 Groove in the direction perpendicular to the bridge axis 4 Groove in the bridge axis direction 5 Anchor bolt welded to the expansion / contraction apparatus body 6 Bottom anchor bolt welded to the expansion / contraction apparatus body 7 Stretch absorption gap 8 Expansion / contraction joint 9 Load-bearing plate provided at the bottom of the center 9 Post-cast concrete to be constructed on-site on both sides of the expansion / contraction device Reinforcement reinforcement for floor slab 11 Reinforcing reinforcement for floor slab box 12 Strut for fixing expansion / contraction device

Claims (3)

  The rubber-like elastic body and the load support plate installed oppositely with a certain joint interval in the expansion joint part that supports the wheel load loaded on the elastic body are installed in a tapered (tilted) mold at the bottom. A featured telescopic device for road bridges.   2. The expansion device for a road bridge according to claim 1, wherein the rubber-like elastic body is provided with one or more spaces for expansion and contraction absorption.   A flat plate installed at a predetermined interval from the tapered (inclined) load support plate at the center bottom of the joint interval (interval) portion of the taper type load support plate facing the expansion joint of the rubber-like elastic body; The expansion / contraction apparatus according to claim 2, further comprising a load support plate having various shapes such as a circular shape, a convex shape, and a concave shape.

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