KR200403801Y1 - Complex expansion joint system - Google Patents

Abstract

The present invention relates to a hybrid expansion joint device installed in the bridge structure.

The present invention is installed in the joint gap part of the structure to accommodate the dynamic behavior of the structure to close the joint gap part, the curing is placed on both sides of the joint gap portion of the structure is coupled to the structure side It is characterized in that the elastic concrete and the elastic seal is inserted into the gap formed between the elastic concrete, the outer surface and the side between the elastic concrete is characterized by consisting of a rubber material elastic seal that is bonded and bonded by an adhesive.

Therefore, almost all kinds of structures, including asphalt-based structures, can be constructed, and the performance and durability are excellent, and also the durability of the structures can be improved, and the construction properties are very excellent. Can be.

Description

Hybrid expansion joints {COMPLEX EXPANSION JOINT SYSTEM}

The present invention relates to a hybrid expansion joint device installed on a bridge structure, and more particularly, to a hybrid expansion joint device composed of a rubber seal and elastic concrete bonded to both sides thereof.

In general, large structures such as bridges and buildings are subject to deformation stresses caused by various factors such as temperature changes, creep and shrinkage, construction errors, loading loads, earthquakes and ground subsidence. If the stress is constrained without being released, there is a risk of cracking and damage to the structure. Therefore, when constructing a large structure, there is a gap between the gaps, which are spaced at regular intervals. By installing expansion joints, the joints are closed to accommodate the dynamic behavior in accordance with the deformation of the structure.

As an example, when a large structure is a bridge, the bridge is composed of a plurality of bridges at the bottom and a plurality of tops that are seated on the top of the bridges to form a road, and both of the tops and the tops are connected to each other. In order to smoothly accommodate the dynamic behavior of the top plate, the seam gap portion is provided with a suitable clearance width.

In addition, by connecting and closing the joint gap in a horizontal direction, the vehicle traveling on the upper part can run smoothly, and also rainwater or various foreign substances flow into and fall through the joint gap to pollute and corrode the lower facilities of the bridge. In order to prevent the joints, the expansion joint is provided with a flexible expansion joint.

Expansion joints have a direct impact on the safety and durability of the structures concerned, and should be able to exhibit excellent performance as the most frequent failure and replacement factor in the overall construction of the structure.

The performance required for expansion joints should basically provide perfect and durable expansion and sealing functions, as well as excellent resistance to UV rays and various chemicals when exposed to the outside, and rapid construction. As much as possible, traffic control at the time of repair should be reduced as much as possible.

Expansion joints are mainly divided into rubber type and steel type, and the existing ones are mostly provided with anchor bolts integrally, and are fixed through the anchor bolts for the structures on both sides of the joint gap, and the anchors for the steel bars planted in the structure. The bolts were welded separately and additionally contracted or cured by placing non-shrinkage or general concrete to cover the anchor bolts, so that they were firmly fixed.However, a great deal of labor and time was required to weld the anchor bolts and cure concrete. There was a problem of poor workability.

Therefore, in order to solve the problem of difficult construction, a technique for fixing and fixing using an adhesive instead of an anchor bolt has been developed, an example of the technology "STRUCTURAL JOINT SYSTEM" of US Patent No. 4,884,381 1 and 2 show the related art.

In the joint gap formed between the structures 14 and 16 facing each other, an elastic seal 20 made of a flexible rubber material is inserted and fixed as an expansion joint device, and the outside of the expansion seal 20 is fixed. After applying the adhesive 32 to the side, the expansion seal 20 is inserted into the joint gap and positioned, and then the air is injected into the expansion seal 20 to expand the expansion seal 20 to expand the expansion seal ( The adhesive 32 applied to both outer surfaces of 20) was strongly adhered to both sides of the structures 14 and 16 on both sides of the joint gap and cured in such a state so that a strong adhesive force was obtained. When the curing of (32) is completed, the air that was injected into the expansion seal 20 was discharged and used.

Therefore, since it is simply fixed using the adhesive 32, the construction is very simple and excellent adhesion quality is also secured to improve the durability.

However, this prior art has a problem of limitation that the adhesive 32 can be applied only to the structures 14 and 16 of a material to which the adhesive 32 can be firmly adhered.

That is, most of the structures 14 and 16 are made of concrete, so there is no problem in the firm adhesion of the adhesive 32. However, when the structures 14 and 16 are roads and have an asphalt pavement layer, the adhesives 32 ) Is not firmly bonded, there is a problem that can not be constructed, even if the adhesive portion of the adhesive 32 is broken immediately within a few days.

The present invention has been devised to solve the above problems, and provides a hybrid expansion joint device that can provide improved performance and durability while being able to construct even a structure such as asphalt, in which an adhesive is not firmly bonded. Its purpose is to.

The hybrid expansion joint device of the present invention for achieving the above object is a expansion joint device installed in the joint gap of the structure to close the joint gap while receiving the dynamic behavior of the structure, the joint gap of the structure Rubber that is inserted into both sides of the elastic concrete and is bonded to the structure side, and inserted into the joint gap formed between the elastic concrete, the outer surface and the side of the elastic concrete is bonded and bonded by an adhesive It is characterized by consisting of elastic seal of the material.

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

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

Figure 3 is a schematic cross-sectional view showing a hybrid expansion joint according to the present invention.

The hybrid expansion joint device 100 according to the present invention uses a stretch seal 110 that is adhesively fixed by the adhesive 130, as in the prior art, the adhesive 130 is a material such as asphalt is not firmly bonded In order to be able to construct the structure 150 of, the adhesive 130 is hardly attached to the structure 150, the solid concrete (elastic concrete) 120 is cast to cure and then firmly bonded, The elastic seal 110 is installed in the joint gap portion 152 formed between the elastic concrete 120 on both sides thereof to be fixed using the adhesive 130.

Therefore, since it is made of a different material of the elastic seal 120 of the rubber material and the elastic concrete 120 is coupled to both sides is named as a hybrid expansion joint device 100, the elastic concrete 120 is itself elastic Since it can be deformed and can also accommodate the dynamic behavior of the structures 150 and 160 more smoothly in conjunction with the elastically deformed elastic seal 110, the elastic action of the elastic seal 110 only due to the presence of the elastic concrete 120 It is possible to greatly improve the durability of the adhesive portion 130 with the durability of the stretch seal 110 itself by reducing the burden on.

In addition, since the elastic concrete 120 may absorb and mitigate external forces, external forces may be transmitted to the adhesive parts of the structures 150 and 160 or the adhesive 130 to prevent adverse effects. In addition, the durability of the structures 150 and 160 may be improved, and driving stability and excellent riding comfort may be provided even for a vehicle traveling on the upper surface thereof.

In other words, in the present invention, in order to be able to construct using the adhesive 130 having a good workability even for the structure 150 of the material that is not firmly bonded with the adhesive 130, first pour concrete on both sides Then, the elastic seal 110 is fixed to the joint gap 152 formed between the concrete by using the adhesive 130, but at this time, by replacing the conventional non-shrinkage or general concrete with concrete used It is to use the elastic concrete 120 that can provide performance and durability improvement.

The elastic seal 110 is made of a rubber material that is elastically deformed, preferably may be made of a good oil resistance chloroprene (chloroprene) material, the brand name neoprene (neoprene) may be used among the chloroprene material.

In addition, the expansion and contraction seal 110 is formed of a hollow structure, the upper and lower horizontal connecting portion on the longitudinal section is preferably formed in the V shape to be able to expand and contract in a more flexible horizontal direction, the hollow inside the central portion In order to connect the vertical connection in the vertical direction, the central vertical connecting portion 112 is formed to be integrated to exert a vertical rigidity against the external force acting in the vertical direction.

Of course, the upper and lower horizontal connections may be formed in a flat shape rather than a V shape, where the V-type elastic seal is a road bridge, a railway bridge, a box structure, etc., in which a flexible stretching function is more important than the upper surface flatness. It can be preferably applied, and the flat type elastic seal can be preferably applied to the sidewalk bridge, stadium, etc. where the top flatness is to be considered more important.

Of course, on both sides of the expansion seal 110, as in the prior art, the uneven portion 114 is formed to improve the adhesive strength with the adhesive 130 is applied, the expansion seal 110 is initially made very long And cut to fit the lengths of the joint gaps 152 and 162 at the time of construction (that is, the widthwise length of the road), and also the air injection hole (not shown) is drilled into the hand tool at the time of construction. Air is injected through the injection hole to improve the adhesive performance of the adhesive 130, and preferably the air injected through the one air injection hole is uniform into both inner spaces partitioned for the central vertical connection portion 112. Communication holes (not shown) may be formed in the central vertical connecting portion 112 so as to communicate both inner spaces to be injected.

On the other hand, the elastic concrete 120 has to be used to the type of the curing speed is very fast to shorten the working time, the corner portion formed in the fully exposed portion is formed by the chamfered (chamfer) (120a) Therefore, it is possible to prevent noise from being generated while the vehicle is in contact with the driving vehicle, and also to prevent stress from occurring due to stress concentration at the corner portion.

In addition, according to the present invention, before the elastic concrete 120 is poured, a bonding agent 140 is first applied to the portion to be poured, and then the elastic concrete 120 is poured to increase the bonding force. .

The construction example of the hybrid expansion joint device 100 according to the present invention having the configuration as described above will be described in detail below.

This construction example is a construction example for the road bridge, the road bridge includes a plurality of top plates that are seated on the upper portion of the plurality of pier to form a road, the top plate first of the concrete layer 160 and its lower side The asphalt pavement layer 150 is paved on the upper side.

Referring to FIG. 4, first, the asphalt pavement layer 150 at the position where the expansion and contraction device 100 is to be inserted is cut to have a predetermined width (FIG. 4A) to be in a state as illustrated in FIG. 4B.

Thereafter, the cut asphalt pavement layer 150 is removed and removed (FIG. 4C), and then the asphalt pavement layer 150 is removed and the asphalt remaining on both sides of the upper and lower portions of the concrete layer 160 is removed. Grinding is performed on both sides of the pavement layer 150 to clean the surface (FIG. 4D).

Here, in the normal bridge construction, the joint layer 162 which is a discontinuous portion is formed in the concrete layer 160 at predetermined intervals, and the asphalt pavement layer 150 is paved without discontinuous portions on the plurality of concrete layers 160. Therefore, the asphalt pavement layer 150 at the joint gap portion 162 of the concrete layer 160 existing therein is cut as described above to expose a predetermined width, and the concrete layer 160 formed therein is exposed at this time. By removing the asphalt pavement layer 150 in a width wider than the width of the joint gap 162 of the joint, the upper surface of the concrete layer 160 in the vicinity of the joint gap 162 is exposed, which is later elastic to this part. The concrete 120 is to be poured.

Subsequently, before placing the elastic concrete 120 on both sides of the portion where the asphalt pavement layer 150 has been removed, first secure the width of the joint gap portion 152 at the center thereof so that the elastic concrete 120 is not poured. In order to install the formwork 170 of the size corresponding to the width of the joint gap 152 in the center portion (Fig. 4e), after installing the formwork 170 the concrete concrete 120 will be placed again It will be cleaned (Fig. 4f).

Then, the binder 140 for increasing the bonding strength of the elastic concrete 120 with respect to the side of the upper surface of the concrete layer 160 on which the elastic concrete 120 is to be cleaned and the asphalt pavement layer 150 on both sides thereof. ) Is applied first (FIG. 4G).

Subsequently, the elastic concrete 120 is poured on both sides of the central formwork 170 (FIG. 4H), and the treated upper surface is flattened (FIG. 4I), and then cured, and when curing is completed, 170).

Meanwhile, while the elastic concrete 120 is cured, the elastic seal 110 is prepared, that is, the elastic seal 110 is first cut to a length corresponding to the width of the road (FIG. 4J), and the sides of the cut end are cut. After the end plate 116, which is a separate plate body, is bonded with an adhesive (Fig. 4K) and sealed, the occurrence of air bubbles is confirmed by immersing in water whether the both ends sealed by the closing plate 116 are completely sealed. It will be confirmed in a way (Fig. 4l).

Thereafter, the prepared elastic seal 110 is moved to the position of the joint gap 152 to be worked (FIG. 4 m), and then the adhesive 130 is applied on both outer surfaces of the elastic seal 110 (FIG. 4 n). Inserting the elastic seal 110 coated with the adhesive 130 into the gap 152 between the elastic concrete 120 exposed by the removal of the formwork 170 (FIG. 4o), the inserted elastic seal 110 After injecting the air into the hole and injecting air into the expansion seal 110 through the air injection hole (Fig. 4p), the air injection hole is closed to maintain a certain time.

At this time, as the air is injected into the expansion and contraction seal 110 is maximally expanded so that the adhesive 130 applied on both outer surfaces of the elastic concrete 120 side of both sides is more closely contacted, without this As such, the adhesive 130 is allowed to cure after a predetermined time in a state of being in close contact with each other.

Subsequently, when the curing of the adhesive 130 is completed, the air injection hole is opened to allow the injected air to be discharged, and then the final cleaning is performed (FIG. 4q), and the installation is completed as shown in FIG. 4r. will be.

In addition, the above-described hybrid expansion joint device 100 according to the present invention is shown for the material that the adhesive 130 is not firmly adhered to, typically an asphalt material structure 150, but of course the hybrid of the present invention The expansion joint device 100 may be installed for the purpose of further improving the elastic performance, even for a material to which the adhesive 130 is firmly bonded.

As described above, the above description merely illustrates a preferred embodiment of the present invention, and those skilled in the art should recognize that modifications and changes can be made to the present invention without changing the subject matter of the present invention.

According to the present invention, it is possible to construct almost any kind of structure including an asphalt-based structure, and its performance and durability are excellent, and also the durability of the structure can be improved, and the workability is very excellent. Can be provided.

1 is a schematic cross-sectional view for explaining the expansion joint according to the prior art,

Figure 2 is a schematic perspective view showing the expansion joint according to the prior art,

3 is a schematic cross-sectional view showing a hybrid expansion joint according to the present invention,

4a to 4r are photographs sequentially showing the construction process of the hybrid expansion joint according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: hybrid expansion joint device 110: expansion seal

112: center vertical connection 114: uneven portion

116: closing plate 120: elastic concrete

120a: chamfer 130: adhesive

140: binder 150: asphalt pavement layer

160: concrete layer 152, 162: seam gap

170: the formwork

Claims (6)

An expansion joint device installed in a joint gap of a structure to close the joint gap while accommodating the dynamic behavior of the structure, An elastic concrete that is cured by being poured on both sides of the joint gap of the structure and coupled to the structure side; The elastic expansion joint device is characterized in that the elastic seal is inserted into the gap between the elastic concrete is formed between the outer surface and the side of the elastic concrete is bonded by the adhesive bond to the elastic material. The method of claim 1, Hybrid expansion joint device characterized in that the adhesive force by the adhesive is improved by inflation by injecting air into the expansion seal. The method of claim 1, Hybrid elastic joint device characterized in that the elastic concrete is to be poured after the first binder is applied to increase the bonding strength of the elastic concrete to the portion of the structure on which the elastic concrete is to be poured. The method of claim 1, The expansion seal, An empty structure inside And a central vertical connecting portion integrally formed so as to connect the upper and lower horizontal connecting portions on the longitudinal section in the vertical direction from the inner central portion thereof. The method of claim 1, The elastic concrete, A hybrid expansion joint device, characterized in that the corner portion formed in the fully exposed portion is formed by the chamfered chamfer portion. The method of claim 4, wherein The expansion seal, A flexible expansion joint device, characterized in that the upper and lower horizontal connecting portion on the longitudinal section is formed in any one of the V shape or flat shape.