KR890005486Y1 - Elastic joint - Google Patents

Abstract

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Description

Concrete seam elastic joint

1 is a perspective view of a concrete joint elastic joint according to the present invention.

Figure 2 is a concrete construction example using the elastic joint of the present invention, Figure 2 (a) is a concrete pavement construction state diagram 2 (b) is a concrete retaining wall construction state diagram.

* Explanation of symbols for main parts of the drawings

1 body 2 reinforcing bending stone

3: elastic material 4: through hole

5: junction

The present invention relates to a concrete joint elastic joint for preventing cracking due to the expansion and contraction of concrete by embedding in concrete joints such as concrete pavement and concrete slab of bridge and concrete retaining wall for construction.

In general, since concrete has high compressive strength or low tensile strength, cracking occurs as a result of repeated expansion and contraction due to temperature change after pouring.

Therefore, when placing concrete, the entire shed area is divided in the longitudinal direction and the wood connection strip is embedded for each seam. However, the elasticity of the wood alone cannot cope with the expansion direction of the concrete. Because of the poor adhesion, there is a gap between the gap between the cracks can not be obtained to obtain a waterproof and dust-proof effect, especially in the large corrugated joints had a problem that is severe.

In addition, the method of embedding the elastic rubber instead of the wooden connection band is also used, but also simply to embed the rubber as it was not able to cope with the expansion and contraction of concrete enough.

The present invention is to solve this conventional problem, and to provide a concrete joint elastic joint that can fully cope with the stretching action of the concrete, the adhesion to the concrete is good to prevent the crack of the concrete.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in the drawing, the elastic member 3 in which the longitudinal through-hole 4 is installed is compressed inside the joint body 1 formed by bending a metal plate having a plurality of reinforcing bending protrusions 2 formed in an inverted U shape. It presses and inserts in the state which a margin remained, and joins the lower end joining part 5 of both sides of the main body 1. As shown in FIG.

It is molded into an iron plate, a steel plate or a copper plate, and the joining of the lower joint 5 is by welding or riveting.

The elastic material 3 is made of a material having good elasticity, for example, synthetic rubber. The elastic material 3 is used to replenish elasticity and reduce materials by the through-holes 4. Make it possible to build.

That is, in manufacture, the elastic material 3 of a circular state (a state whose cross section is wider than the state shown) is inserted between the main bodies 1, the both sides are pressurized, and the lower junction part 5 of the main assembly 1 is joined.

When placing concrete using the elastic joint of the present invention configured as described above, in the case of concrete pavement or retaining wall shown in Figs. 2 (a) and 2 (b), the concrete pavement 6 or retaining wall 7 is The plastic joint of the present invention is arranged at every interval between the joints at a predetermined interval with respect to the direction. The part is removed with a cutter or a grinding machine.

When the concrete pavement 6 or retaining wall 7 expands and contracts according to the temperature change after construction, the body 1 is expanded by the expansion and contraction of the elastic material 3 of the elastic joint embedded in the joint, and is always connected to the joint part. Since it is in close contact with each other, the concrete pavement 6 or the retaining wall 7 does not crack or have a gap between the joints.

That is, since the elastic member 3 inserted between the main bodies 1 is pressurized with the remaining compression margin remaining, when the concrete pavement 6 or the retaining wall 7 is stretched, the joint is compressed and absorbed by the amount of stretching. When it is contracted, it expands and expands within the range of the amount of pressure initially applied, so that both sides of the joint closely adhere to the concrete joint.

Here, the main body 1 of the joint is expanded by the lower joint 5 as a hinge point, and the strength is maintained by the reinforcing bending protrusions 2 protruding on both sides, and the adhesion to the concrete is reinforced and deformed or separated. At the same time, the elastic deformation in the direction perpendicular to the bending protrusion 2 will have the effect of being absorbed by the margin width of the bending protrusion.

As described above, according to the present invention, since both sides of the joint are always in close contact with the concrete joint, cracks do not occur, and even when subjected to vibration, the joint is not cracked and a waterproof effect can be obtained.

Claims (1)

Compression margin remains inside the joint body 1 formed by bending a metal plate on which a plurality of reinforcing bending protrusions 2 are formed outward in an inverted U-shape, and through-holes 4 provided with through holes 4 in the longitudinal direction. A concrete joint elastic joint, which is pressurized and inserted in a closed state, and the lower joints 5 on both sides of the main body 1 are joined.