KR20170022430A

KR20170022430A - Reparing method of mono-cell joint

Info

Publication number: KR20170022430A
Application number: KR1020150117385A
Authority: KR
Inventors: 희민 박; 안창모
Original assignee: 대창이엔지 주식회사; 안창모; 희민 박
Priority date: 2015-08-20
Filing date: 2015-08-20
Publication date: 2017-03-02

Abstract

According to the present invention, disclosed is a method for repairing a mono-cell joint, comprising: (a) a step of remaining each lateral plate in an original form by cutting, separating, and removing a waveform portion and an elastic joint member of each upper plate using a cutting machine such that the upper plate is vertical to an inner side of each lateral plate of the mono-cell joint required to be repaired; (b) a step of grinding and finishing the inner side of each lateral plate which the cut elastic joint member contacts; (c) a step of applying an adhesive onto the inner side of each lateral plate, and inserting and attaching a seal therebetween, wherein the seal is continuously installed on a connection part of the mono-cell joint required to be repaired. Thus, the present invention prevents a crack of nearby concrete caused by vibrations of a mono-cell elastic joint apparatus, and also prevents rain water from entering a lower structure of a bridge.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of repairing a mono-cell joint,

The present invention relates to a method of repairing a mono cell joint. More specifically, the present invention relates to a method of repairing a monocell joint without complicated repairing process by cutting a portion between vertical steel pieces and inserting a sealing seal when the monocell joint installed in a bridge needs to be repaired.

The expansion joints absorb the horizontal movement and rotation of the bridge due to the expansion and contraction of the bridge due to temperature, the drying shrinkage of the concrete and the creep and live load, thereby smoothly running the vehicle and preventing the storm from entering the substructure Thereby preventing the aging of the bridge.

The expansion joints are classified into rubber type and steel type. The rubber type is divided into NB type and monocell type again, and the steel type can be classified into the rail type and the strong finger type.

The Kang Finger equation is to allow the steel fingers to accommodate the expansion and contraction while the rail type uses the expansion and contraction of the beam due to the rotation of the spherical bearing and the elastic displacement of the elastic bearing.

The NB type is constructed such that the rubber and the steel sheet are integrally formed and deformed by the deformation of the rubber, and the monocell type is a method of accommodating the expansion and contraction by utilizing the elastic deformation of the rubber.

Specifically, the monocell method is simple in construction as shown in FIG. 1A, and is simple in construction and easy to repair. The running surface is made of rubber, and the impact absorption is better than that of a steel product. Also, the width of the joint is small, have.

However, in the monocell method, since the rubber abuts directly against the vehicle wheel, the abrasion is severe, the durability is somewhat low, and the angle and the rubber are not integrated with each other due to the construction.

1B is a view showing a replacement method of a conventional mono-cell type expansion joint device.

In the replacement method of the mono-cell type expansion joint device, after the filler concrete 60 is partially crushed, the fastening member 30 is released to release the assembled state, and the mono-cell fixed- ) Are separated and removed as a whole,

The monolithic integrated type mono cell 10 can be replaced by sequentially inserting the new integrated mono cell 10, assembling the fixing holder and the mono cell, and placing the filled concrete in sequence.

This method is a method in which the expansion joint 14 can replace only the old mono-cell 10 with the old concrete, thereby eliminating the process of reinforcing reinforcement of the after-concrete process. However, due to the inherent characteristics of the expansion joint, It is necessary to fabricate monolithic monolithic cells 10 without the monolithic cells 10 each time. Therefore, the monolithic cells must be entirely separated and removed and assembled again. In this process, the filled concrete must be crushed and re- The construction time is long because of the necessity of interception.

Further, since the plurality of mono cells 10 are fastened while being joined together by the fastening member 30 and the connecting member in the transverse direction of the bridge even after the repair, the vibration of the after-concrete due to the vibration transmitted by the vehicle passing through the bridge, Cracks inevitably occur.

In addition, in the above method, due to the structure, defective adhesion between the expansion joint and the side plate due to vibrations in the connecting member necessarily occurs, and the defective section continuously increases, and the excellent flows into the lower structure of the bridge to accelerate the aging of the bridge .

Accordingly, it is an object of the present invention to solve the above-mentioned problems of the prior art. Accordingly, it is an object of the present invention to provide a mono-cell expansion joint by inserting a sealing seal (SEAL) The present invention provides a method for repairing a mono cell joint that prevents cracks in the after-concrete caused by vibrations in the apparatus and prevents the storm from flowing into the bridge substructure.

In order to solve the above-described technical problem,

(a) separating and removing the corrugated portion and the expansion joint of the upper plate by using a cutter so as to be perpendicular to the inner surface of each of the side plates of the mono cell joint requiring maintenance; (b) grinding and finishing the inner surface of each of the side plates to which the cut stretchable joint has been joined; And (c) applying a lubrication adhesive to the inner surface of each side plate and inserting and attaching a sealing seal, whereby the sealing of the mono cell joint is performed so that the sealing seal is continuously installed at the connecting portion of the mono cell joint requiring repair A method is disclosed.

In addition, in the step (c), the sealed seal has a plurality of side horizontal grooves formed on its side surface, and a lubricating adhesive is filled in the side horizontal grooves to secure sufficient adhesion performance. .

The upper surface of the hermetic seal in step (c) may be formed lower than the upper surface of the bridge so that the rain and foreign matter can be discharged in the lateral direction of the bridge through the upper part of the hermetic seal. / RTI >

Also, after the step (c), a method for repairing a mono cell joint including a step of finishing a crack by using an adhesive agent after a crack is generated around a mono cell joint requiring repair is provided.

The method of repairing a mono cell joint according to the present invention prevents the cracks of the after-concrete caused by the vibration in the mono-cell expansion joint device by preventing the connecting portion in the lateral direction of the bridge during repair of the mono cell joint, It is possible to prevent the rain from flowing into the bridge substructure and to easily drain it to the side of the bridge easily by inserting the luting adhesive, inserting the sealing seal, and setting the upper part of the sealing seal and the predetermined step on the road surface.

In addition, the monocell is removed without crushing and reworking the concrete around the monocell joint, and the application of the adhesive and the sealing seal are inserted, thereby enabling quick and economical construction.

FIGS. 1A and 1B are a sectional view of a conventional mono-cell joint maintenance method in a mounted state,
1C is a photograph of a reflection crack generated in a conventional mono cell joint,
FIG. 2 is a perspective view of a mono cell joint according to the present invention before maintenance. FIG.
3 is a schematic view illustrating a repair process of a mono cell joint according to an embodiment of the present invention.
Fig. 4 is a view showing the flow chart of Fig. 3. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Monocell joint of the present invention]

FIG. 2 is a perspective view of a mono cell joint according to the present invention before maintenance. FIG.

The monocell joint according to the present invention includes a first upper plate 111, a second upper plate 113, a first side plate 115, a second side plate 117, a plurality of stud anchors 119, An expansion joint 120, and a post-concrete 140.

The first upper plate 111 is a portion directly contacting the passing vehicle.

One side of the first upper plate 111 is joined to and tightened with the after concrete 140 and the other side is formed as a corrugated portion so that horizontal movement of the bridge due to temperature rise or the like is maintained while maintaining the second upper plate 113 and the flow field 112 facing each other. Absorbed. The first upper plate 111 is vertically connected to the first side plate 115. The first upper plate 111 may be formed of a metal material, but may be formed of a plastic material.

The second upper plate 113 faces the first upper plate 113 and one side of the first upper plate 113 is bonded to and protruded from the after concrete 140 and the other side of the second upper plate 113 is formed to correspond to the corrugated shape of the first upper plate 113. The second upper plate 113 is vertically connected to the second side plate 117 and may also be formed of a metal material, but it is also possible to use a plastic material.

The flow field 112 is formed as a gap formed between the first and second upper plates 111 and 113 at a predetermined spacing interval for expansion and contraction.

Foreign matter such as rainwater or gravel flows down to the lower part between the flow-throughs 112, and the foreign matter is discharged in the lateral direction of the bridge through the grooves formed in the upper portion of the expansion joint 120.

The first and second side plates 115 and 117 are connected vertically from the bottom surfaces of the first and second top plates 111 and 113 respectively. The outer surface of the first and second side plates 115 and 117 is bonded to and strongened with the after- (A method of adding a rubber material and sulfur for a stretchable joint material blended in a mold, and connecting the stretchable and contractile materials together while applying a high temperature to each other).

A plurality of stud anchors 119 are integrally formed on the outer surfaces of the first and second side plates 113 and 115 at predetermined intervals in the lateral direction of the bridge. The stud anchors 119 are embedded in the after-put concrete 140 and remain fixed.

Since both sides of the expansion joint 120 are attached to the first and second side plates 115 and 117, they can freely expand and contract in the longitudinal direction of the bridge in accordance with the horizontal movement of the bridge due to the temperature rise and the like.

At this time, since the transverse width of the bridge extends from several meters to tens of meters, the monocell joints must be connected by the connecting portions 131 and 133. As shown in FIG. 2, the connecting parts 131 and 133 are composed of a connecting cap 131 and a fastening device 133.

The connection cap 131 connects the first and second upper plates 111 and 113 in the lateral direction and absorbs vibration.

Each of the upper plates 111 and 113 is arranged at a predetermined interval in the transverse direction when connected in the transverse direction, and the connection cap 131 is inserted in the spaced intervals to close the empty space between the upper plates 111 and 113, .

The fastening device 133 is formed to include a connecting flange extending from an outer surface and a transverse end of each of the side plates 115 and 117 so as to connect the side plates 115 and 117 in the lateral direction and is fastened by bolts or nuts The connection flanges facing each other can be fastened or formed to be strong by welding or the like.

The mono cell joint is integrally embedded in the concrete after being placed on the bridge top plate.

As the connecting portions 131 and 132 are formed, the monocell joints are formed by the vibration due to the continuous passing of the vehicle, the configuration of the connecting cap 131 and the first and second upper plates 111 and 113 having different rigidities, Reflection cracks are generated in the after-concrete 140 around the connecting portion of the mono cell joint due to the vibrations at the time of vehicle passing due to the spacing configuration of the upper plates 111 and 113, and the cracks become larger as time passes.

In addition, due to the vibration and adhesion failure, the vulcanized and fused portions on the inner surfaces of the first and second side plates 115 and 117 are adhered poorly or even fall off, and foreign matter or foreign matter enters the lower structure of the bridge.

Accordingly, it is necessary to repair the mono cell joint. Hereinafter, a method of repairing the mono cell joint according to the present invention will be described in detail.

[Method of repairing mono cell joint of the present invention]

FIGS. 3A through 3D illustrate a repair method of a mono cell joint according to the present invention.

First, a cutter (not shown) is set for a mono cell joint requiring repair as shown in FIG. 3A.

Next, as shown in FIG. 3B, the corrugated portions of the top plates 111 and 113 and the expansion joint 120 are cut so as to be perpendicular to the inner surfaces of the side plates 115 and 117 by a cutter (not shown).

In this case, an engine cutter or a plasma cutter can be used as the cutter, and all of the portions in contact with the inner surface of the side plates 115 and 117 in the lateral direction of the bridge are cut.

Then, the cut portion is removed as shown in FIG. 3C, and the inner surface of each of the side plates 115 and 117, that is, the portion to which the cut stretchable joint 120 is joined, is ground.

That is, the portion where the cut stretchable joint 120 is joined is a place where the hermetic seal is to be joined later, so that the grinding operation is performed so that foreign matter is not left for precise joining.

Next, as shown in FIG. 3D, a lubrication adhesive is applied to the inner surfaces of the side plates 115 and 117, and the sealing seal 150 is inserted and attached.

The hermetic seal 150 is made of a material that can freely expand and contract in the longitudinal direction of the bridge in accordance with the horizontal movement of the bridge, and is formed of a rectangular parallelepiped having a rectangular cross section. The hermetic seal 150 is attached to the inner surfaces of the first and second side plates 115 and 1117, respectively, on the lateral sides of the bridge.

For example, the hermetic seal 150 may be formed of a low-density rubber material which has a plurality of side horizontal grooves formed on its side surface and is filled with a lubricant adhesive to sufficiently secure adhesion performance, It is preferable to use the one having elasticity so that it can be easily bent and has high waterproof performance, durability as well as stability from ultraviolet ray, fireproofing, and soundproofing effect.

At this time, the upper surface of the hermetic seal 150 is formed to be lower than the upper surface of the bridge (for example, about 3 mm) so that rain and foreign matter can be discharged laterally through the upper portion of the hermetic seal 150 do.

After step (c), after the cracks are generated around the monocell joints requiring repair, the concrete is finished using the adhesive to complete the repair of the monocell joints.

Accordingly, the method of repairing the mono cell joint according to the present invention is configured such that there is no connection portion in the lateral direction at the upper portion of the mono cell joint, so that the vibration of the passing vehicle is minimized, and the crack of the after concrete can be minimized.

That is, the sealing seal is continuously installed on the connection portions 131 and 133 of the mono cell joints requiring maintenance, so that the mono cell joint connection portion is not required to be separately repaired.

In addition, the connection parts are not provided and the corrugated parts of the top plates 111 and 113 are removed, so that the respective parts of the mono cell joint according to the present invention are integrally formed. As a result, stress concentration in each part of the mono cell joint is relaxed and the vibration due to the passing of the vehicle is minimized, so that the repaired mono cell joint minimizes the cracks in the after-concrete.

In addition, as the vibration of the mono cell joint is minimized as described above, in addition to the field bonding installation in which the existing vulcanized and adhered portions, that is, the inner surfaces of the side plates 115 and 117, The sealing seal 150 does not fall off, and no foreign matter or foreign matter enters the lower structure of the bridge.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be injected and implemented, and components described as being distributed in a similar fashion may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

111: first upper plate 113: second upper plate
115: first side plate 117: second side plate
119: stud anchor 120: stretch joint
131: connection cap 133: fastening device
140: Futta concrete 150: Seal seal

Claims

A method for repairing a mono cell joint including an upper plate, a side plate vertically connected to the upper plate and having a plurality of stud anchors which are embedded in the later concrete on the sides, and an expansion joint attached to the inner surface of each side plate,
(a) a part of each of the top plates 111 and 113 including the corrugated portion and the stretch joint 120 are separated and removed by a cutter so that the side plates 115 and 117 of the mono cell joint need to be repaired so as to be perpendicular to the inner surfaces of the side plates 115 and 117, Remaining as it is;
(b) grinding and finishing the inner surfaces of the side plates 115 and 117 to which the cut and stretchable joint members 120 are joined; And
(c) applying an adhesive to the inner surfaces of the side plates (115, 117) and inserting and inserting the sealing seal (150)
Wherein the sealing seal is continuously installed on the connecting portions (131, 133) of the mono cell joint requiring repair.

The method according to claim 1,
The hermetic seal 150 of the step (c) includes a plurality of side horizontal grooves formed on a side surface thereof, and a mono cell using a low density material which is filled with a lubricant adhesive to sufficiently secure close adhesion, Joint repair method.

3. The method according to claim 1 or 2,
The upper surface of the hermetic seal 150 of the step (c) is attached to the upper surface of the bridge so as to be lower than the upper surface of the bridge, so that rain and foreign matter can be discharged in the lateral direction of the bridge through the upper part of the hermetic seal 150. [ Joint repair method.

3. The method according to claim 1 or 2,
The method of any preceding claim, further comprising, after step (c), finishing the cracks using an adhesive agent after the cracks are generated around the mono cell joints requiring repair.

(a) The corrugated portions of the upper plates 111 and 113 and the expansion joint 120 are cut and separated by a cutter so as to be perpendicular to the inner surfaces of the respective side plates 115 and 117 of the mono cell joint requiring maintenance, Remaining as it is; (b) grinding and finishing the inner surfaces of the side plates 115 and 117 to which the cut and stretchable joint members 120 are joined; And (c) applying a lubrication adhesive to the inner surfaces of the side plates 115 and 117 and inserting and attaching the sealing seal 150. In this case, the sealing portions 131 and 133 of the mono- A mono cell joint refurbished by a mono cell joint repair method that allows continuous installation.