KR101618183B1 - Dry cracks in concrete bridge structure maintenance device - Google Patents

Dry cracks in concrete bridge structure maintenance device Download PDF

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Publication number
KR101618183B1
KR101618183B1 KR1020150139338A KR20150139338A KR101618183B1 KR 101618183 B1 KR101618183 B1 KR 101618183B1 KR 1020150139338 A KR1020150139338 A KR 1020150139338A KR 20150139338 A KR20150139338 A KR 20150139338A KR 101618183 B1 KR101618183 B1 KR 101618183B1
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KR
South Korea
Prior art keywords
spray
short ball
tube
spray tube
flow generator
Prior art date
Application number
KR1020150139338A
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Korean (ko)
Inventor
백승복
Original Assignee
주식회사 건설방재기술연구원
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Priority to KR1020150139338A priority Critical patent/KR101618183B1/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/06—Impeller wheels; Rotor blades therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/006—Treatment of used abrasive material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

The present invention relates to a dry crack repair apparatus for a concrete bridge structure, and more particularly, to a dry crack repair apparatus for an improved concrete bridge structure capable of quickly repairing cracks in a bridge structure using a crack repair agent and a shot blast will be.

Description

Technical Field [0001] The present invention relates to a dry crack repair apparatus for a concrete bridge structure,

The present invention relates to a dry crack repair apparatus for a concrete bridge structure in the field of civil engineering safety diagnosis, and more particularly to a dry crack repair apparatus for repairing cracks in a bridge structure using a crack repair agent and a shot blast To a dry crack repairing apparatus.

Reinforced concrete structures are deteriorated in durability and usability in the long term due to deterioration of structures due to salt corrosion, neutralization, alkali aggregate reaction, chemical corrosion as well as corrosion expansion of steel due to penetration of water.

These structures, especially bridges, need to be constantly repaired and maintained as the deterioration continues and there is a risk of eventual collapse of the structure.

Since the detachment of the surface of the bridge structure or the occurrence of initial defects or cracks facilitates the movement of deterioration factors and promotes the progress of deterioration, it is necessary to repair and reinforce the deterioration at the beginning of deterioration in order to secure the stability and performance of the concrete bridge structure. And it is necessary to improve durability performance.

Therefore, after removing the concrete part including deterioration factor such as detachment or detachment of the cross section of the structure due to deterioration of concrete, corrosion of steel, or other causes, it is necessary to fill the section recovery material in order to restore the cross- It is a common practice to apply a wet method to repair by spraying.

However, in order to reinforce concrete structures, properties such as durability, adhesive strength and quick-setting properties of the mortar composition for repair and reinforcement are required, and the economical problem of the material is also an important factor.

In the conventional technology, polymer mortar mixed with cement and polymer has been used to repair the damage of concrete structure. Conventional polymer mortar mainly uses epoxy resin type polymer. The mortar having the above-mentioned epoxy resin-based polymer has disadvantages in that it is not susceptible to acidic environments, in particular, physical properties such as bending strength, tensile strength and compressive strength are not high.

In recent years, various types of reinforcing agents such as a concrete structure repair and reinforcing agent using an acrylic resin-based polymer have been developed to solve such problems.

Nevertheless, most of these repair methods are time consuming because they are wet, and it takes more time to complete the curing after repair, so they are in a situation where rapid repair is required.

Korea Patent Registration No. 10-1528120 (2015.06.08) 'Maintenance and Reinforcement of Concrete Structures and Repair and Reinforcement Methods of Concrete Structures Using the Same'

The present invention has been made in view of the above-described problems in the prior art, and it is an object of the present invention to provide a concrete bridge structure in which cracks are generated and a quick repair is required, The present invention provides a dry crack repair apparatus for a concrete bridge structure.

In order to achieve the above object, the present invention provides a dry crack repairing apparatus for a concrete bridge structure, the hollow cracking repairing apparatus comprising: 110 are formed; The open upper surface of the device housing 100 is sealed by an openable cover 120; A castor 130 is installed at each of four lower corners of the apparatus housing 100; A pair of raising and lowering motors 150 are installed on the inner bottom surface of the apparatus housing 100 so as to be symmetrical to each other; A ball screw 160 is connected and fixed to each motor shaft of the ascending / descending motor 150; Both sides of the base frame F are engaged with and engaged with the ball screw 160; A cylindrical injection flow generator 200 is integrally fixed to the upper surface of the base frame F. The injection flow generator 200 is provided with an impeller 210 at the center of the circle, And sucks the side of the injector flow generator (200) and injects high pressure in the circumferential direction of the injector flow generator (200); A spray flow passage 202 having a helical shape is formed inside the spray flow generator 200; A spray tube 220 communicating with the spray path 202 is connected to a circumferential portion of the spray stream generator 200; An area heat generating element 222 is installed on a part of the upper surface of the spray tube 220; A corrugated tube (224) is detachably fixed to the tip of the spray tube (220); A recovery hole 228 is formed on a lower surface of the spray tube 220; A dome-shaped recovery chamber 240 is fixed to the lower surface of the spray tube 220 which is outside the recovery hole 228; A short ball receiving tube 260 is fixed to a part of the upper surface of the spray tube 220; The short ball receiving chamber 260 and the collecting chamber 240 are connected to collect a shot blasted short ball through a recovery hose 250; A supply hole 270 is formed in the bottom surface of the short ball receiving tube 260 so as to communicate with the inside of the spray tube 220; A sliding gate 280 is provided at a lower end of the short ball receiving container 260 to control supply and interruption of the short ball. A supplementary hopper 290 is installed at the upper end of the short ball receiving container 260 so that a short ball can be replenished. An opening / closing valve 292 is provided in a part of the flow path of the replenishing hopper 290 to prevent the outside air from being introduced into the hopper 290 during operation, thereby automatically supplying the shot ball using the differential pressure; A position fixing cylinder 140 is further provided on the bottom surface of the apparatus housing 100 adjacent to each of the casters 130. The position fixing cylinder 140 is provided with a position fixing cylinder 140, A rubber pad 142 is provided which is in contact with or not in contact with the mounting surface provided with the housing 100; The injection passage 202 is partly partitioned by a partition wall 230. The partition wall 230 is further formed with a plurality of through holes 232 for preventing vortical flow of the circulation air. The length of the spray tube 220 is designed to be at least 1.5 times greater than the diameter of the spray flow generator 200; The present invention also provides a dry crack repairing apparatus for a concrete bridge structure, characterized in that a tip of the bellows pipe (224) is further provided with a close contact piece (226) of an enlarged shape made of rubber or silicone.

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According to the present invention, if cracks are generated in a concrete bridge structure and quick repair is required, the effect can be obtained that the safety is further improved by quick repair in a short period of time by dry rather than wet.

1 is an exemplary view of a dry crack repairing apparatus for a concrete bridge structure according to the present invention.
Fig. 2 is an enlarged view of the main part of Fig.
FIG. 3 is an enlarged view of a part of FIG.
4 is a schematic view showing an example of repairing a concrete bridge structure according to the present invention using a dry crack repairing apparatus.

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

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

1 to 3, the dry crack repairing apparatus for a concrete bridge structure according to the present invention includes an apparatus housing 100.

The apparatus housing 100 is formed in a hollow rectangular box shape, and an upper portion is opened, and a spray pipe installation hole 110 having a long hole shape in a vertical direction is formed at one upper side.

In this case, the spray tube installation hole 110 is formed in the shape of a long hole because the spray tube 220 can be moved up and down.

Further, a cover 120 of a conventional structure which can be opened and closed through a hinge means such as a hinge is further installed on the opened upper surface of the apparatus housing 100 to protect the inside of the apparatus.

The caster 130 is installed at four corners of the lower bottom of the apparatus housing 100 so that the apparatus housing 100 can be moved and fixed at the moved position. At least two position fixing cylinders 140 are further installed.

Therefore, when the apparatus housing 100 is to be moved, the position fixing cylinder 140 is raised. Then, since only the caster 130 is in contact with the bottom surface, the apparatus housing 100 can be easily lifted and moved.

Then, when the movement to the work place is completed, the position fixing cylinder 140 is lowered again. Then, the rubber pad 142 fixed to the lower end of the position fixing cylinder 140 is stably fixed in position so as not to move while being grounded on the bottom surface, so that the rubber pad 142 is guided to facilitate the operation.

A pair of raising and lowering motors 150 are provided symmetrically on the inner bottom surface of the apparatus housing 100 and ball screws 160 are connected and fixed to motor shafts of the raising and lowering motor 150 .

Both sides of the base frame F are engaged with the ball screw 160 and are engaged with each other.

Therefore, the base frame F can be raised or lowered in the apparatus housing 100 in accordance with the rotation direction of the up / down motor 150.

Since the base frame F has a size slightly smaller than the inner space of the apparatus housing 100 and is in a rectangular plate shape, the base frame F can not rotate inside the apparatus housing 100 and can be raised or lowered along the inner wall of the apparatus housing 100 Descending shape.

On the other hand, a cylindrical injection flow generator 200 is integrally fixed to the upper surface of the base frame F. [

The impeller 210 is installed in the center of the circle of the injector flow generator 200 and sucks the outside air from the side of the impeller generator 200 when the impeller 210 rotates, .

For this purpose, a jet flow passage 202 having a slightly helical shape is formed inside the jet flow generator 200. This is because a part of the jet flow passage 202 is partitioned by the separation wall 230 so as to increase the high- do.

That is, when there is no separating wall 230, the injected high-pressure air is circulated to generate a loss, but the separating wall 230 is formed, thereby minimizing the circulating air and increasing the front-side output.

However, when the partition wall 230 is completely blocked, a vortex loss occurs at a boundary portion where the injection pipe 220 and the injection path 202 are connected. Therefore, in order to solve this problem, the partition wall 230 is provided with a plurality of through holes 232 May be formed.

A spray tube 220 communicating with the spray path 202 is connected to a part of the circumference of the spray stream generator 200. The spray tube 220 is integrated with the spray stream generator 200, However, it is quite natural that they can be separated from each other and joined by flanges, bolts, and nuts.

At this time, the length of the injection pipe 220 should be longer than the diameter of the injection flow generator 200 so that a sufficient high-pressure injection is possible. Preferably 1.5 times or more of the diameter, the high-pressure injection and the discharge directionality can be enhanced.

2, the spray tube 220 may have a rectangular parallelepiped shape having a wide width and a small height, and may have a surface heating element 222 on a part of its top surface.

The planar heating element 222 is a kind of heater that heats up to a specific temperature and heats a shot ball accelerated inside the jetting tube 220 and the air flow to generate a striking surface of the pier where the crack is formed, So as to improve the batting workability.

A corrugated tube 224 is detachably fixed to the distal end of the injection tube 220 and a crimped tip 226 is provided at the distal end of the corrugated tube 224.

In this case, the corrugated pipe 224 may be detachably assembled to a hook structure known in the injection pipe 220. The close contact piece 226 may be made of rubber or silicone material, And is attached to maximally adhere to a pierced surface where cracks are formed to increase the adhesion.

In addition, a recovery hole 228 is formed on the lower surface of the spray tube 220, and a dome-shaped recovery chamber 240 is fixed to the outer side of the recovery hole 228, that is, the lower surface of the spray tube 220 , And the recovery chamber (240) is configured to recover shot blasted short balls through the recovery hose (250).

A short ball receiving tube 260 is fixed to a part of the top surface of the spray tube 220 and an end of the recovery hose 250 is connected to the short ball receiving tube 260.

A supply hole 270 is formed in the bottom surface of the short ball receiving tube 260 so as to communicate with the inside of the spray tube 220. The supply hole 270 is easily sucked by the pressure difference between the high- Be inclined so that it can enter.

In addition, a sliding gate 280 is provided at the lower end of the short ball receiving container 260 so as to intercept the supply and shutoff of the short ball, and a short ball can be supplied to the upper end of the short ball receiving container 260 Off valve 292 is installed in a part of the flow path of the replenishing hopper 290 to prevent the outside air from being introduced to the inside of the replenishing hopper 290 so that the short ball supply using the differential pressure is automatically performed.

Here, the sliding gate 280 and the opening / closing valve 292 are preferably formed in the form of a solenoid valve, and may be controlled by a controller (not shown).

4, when a crack C is generated in a part of the waterproof wall W such as a bridge or a pier, the present invention is applied to a case where a crack Shot blasting.

To this end, the device according to the invention is set in close proximity and set and fixed.

Then, when the impeller 210 is operated, the high-pressure air is sprayed on the crack face, and the short balls inside the short ball receiving cylinder 260 are injected together, so that the small balls of the small balls strike the crack face strongly, I will.

This operation works when the apparatus of the present invention is moved so as to cover all of the cracks C, and when the short blasting is completed, the grooves H having a certain depth covering the cracks C are formed.

At this time, the depth of the groove H does not need to be deep because the thickness of the reinforcing plate P to be attached is sufficient.

Then, the grooves H form a plurality of anchor grooves AC at arbitrary points.

The anchor grooves (AC) may be formed by drilling a certain depth using a concrete drill bit.

When the anchor groove AC is formed, a known filler is filled along the crack C, an adhesive is applied to the groove H, and the reinforcing plate P is fixed with the bolts anchored Even if tension is applied around the crack C while completely covering the crack C, there is a reinforcing plate P for holding and fixing the crack C so that the crack C can not proceed further, .

As described above, the present invention is excellent in convenience of performing a reinforcing operation easily and conveniently by a non-wet dry method.

100: device housing 200: jet flow generator
C: crack H: home
P: reinforcing plate

Claims (1)

As dry crack repair equipment for concrete bridge structures,
The upper part is opened and the upper side of the upper part is provided with a device housing 100 having a long hole-type spray pipe installation hole 110 formed therein; The open upper surface of the device housing 100 is sealed by an openable cover 120; A castor 130 is installed at each of four lower corners of the apparatus housing 100; A pair of raising and lowering motors 150 are installed on the inner bottom surface of the apparatus housing 100 so as to be symmetrical to each other; A ball screw 160 is connected and fixed to each motor shaft of the ascending / descending motor 150; Both sides of the base frame F are engaged with and engaged with the ball screw 160; A cylindrical injection flow generator 200 is integrally fixed to the upper surface of the base frame F. The injection flow generator 200 is provided with an impeller 210 at the center of the circle, And sucks the side of the injector flow generator (200) and injects high pressure in the circumferential direction of the injector flow generator (200); A spray flow passage 202 having a helical shape is formed inside the spray flow generator 200; A spray tube 220 communicating with the spray path 202 is connected to a circumferential portion of the spray stream generator 200; An area heat generating element 222 is installed on a part of the upper surface of the spray tube 220; A corrugated tube (224) is detachably fixed to the tip of the spray tube (220); A recovery hole 228 is formed on a lower surface of the spray tube 220; A dome-shaped recovery chamber 240 is fixed to the lower surface of the spray tube 220 which is outside the recovery hole 228; A short ball receiving tube 260 is fixed to a part of the upper surface of the spray tube 220; The short ball receiving chamber 260 and the collecting chamber 240 are connected to collect a shot blasted short ball through a recovery hose 250; A supply hole 270 is formed in the bottom surface of the short ball receiving tube 260 so as to communicate with the inside of the spray tube 220; A sliding gate 280 is provided at a lower end of the short ball receiving container 260 to control supply and interruption of the short ball. A supplementary hopper 290 is installed at the upper end of the short ball receiving container 260 so that a short ball can be replenished. An opening / closing valve 292 is provided in a part of the flow path of the replenishing hopper 290 to prevent the outside air from being introduced into the hopper 290, so that the short ball supply using the differential pressure is automatically performed.
A position fixing cylinder 140 is further provided on the bottom surface of the apparatus housing 100 adjacent to each of the casters 130. The position fixing cylinder 140 is provided with a position fixing cylinder 140, A rubber pad 142 is provided which is in contact with or not in contact with the mounting surface provided with the housing 100;
The injection passage 202 is partly partitioned by a partition wall 230. The partition wall 230 is further formed with a plurality of through holes 232 for preventing vortical flow of the circulation air.
The length of the spray tube 220 is designed to be at least 1.5 times greater than the diameter of the spray flow generator 200;
Wherein the bellows pipe (224) is further provided with a close contact piece (226) made of rubber or silicone in an enlarged form.
KR1020150139338A 2015-10-02 2015-10-02 Dry cracks in concrete bridge structure maintenance device KR101618183B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101734101B1 (en) * 2016-09-21 2017-05-15 주식회사 건설방재기술연구원 Repair equipment for section of concrete bridge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000190226A (en) * 1998-12-25 2000-07-11 Sankyo Giken Kogyo Kk Shot blast method and shot blast device
JP2003245619A (en) * 2002-02-26 2003-09-02 Jfe Steel Kk Dry ice snow jet washing method and washing apparatus using the same
JP2009248236A (en) * 2008-04-04 2009-10-29 Eikichi Yamaharu Dry ice blasting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000190226A (en) * 1998-12-25 2000-07-11 Sankyo Giken Kogyo Kk Shot blast method and shot blast device
JP2003245619A (en) * 2002-02-26 2003-09-02 Jfe Steel Kk Dry ice snow jet washing method and washing apparatus using the same
JP2009248236A (en) * 2008-04-04 2009-10-29 Eikichi Yamaharu Dry ice blasting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101734101B1 (en) * 2016-09-21 2017-05-15 주식회사 건설방재기술연구원 Repair equipment for section of concrete bridge

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