KR20020073119A - Micro packer assembly and construction method using it - Google Patents

Abstract

PURPOSE: A micro packer assembly is provided to shorten a period of a repair work for cracks. CONSTITUTION: The micro packer assembly(600) comprises a hollow rubber sleeve(630) coupled to a hole and provided with a screw part, a hollow packer body(615) having a screw coupling part screwed on the screw part and a nozzle part connected with a chemical agent injector, and a holder bar(620) coupled with the nozzle part and the coupling part to prevent a leakage of the injected chemical agent.

Description

Micro packer assembly and construction method using it

The present invention relates to a micro packer assembly and a low to medium pressure crack repair method using the same, and in particular to enable a finishing work before curing after injecting the crack repair liquid into the crack gap to significantly shorten the air for crack repair The present invention relates to a micropacker assembly having an improved structure and a low to medium pressure crack repair method using the same.

In general, a concrete structure is likely to be cracked on the inside or outside of the structure due to various factors such as dry shrinkage, temperature change and leakage of concrete. In addition, if a lot of load is applied, such as the underground parking lot floor, or where the construction of the waterproofing layer and the finishing concrete layer is poor in the general floor slab, the finishing concrete layer is often lifted even if not exposed to the outside of the structure. Most of the cracks caused by normal dry shrinkage of concrete have no effect on the structure, but the degree of dry shrinkage is too severe and the cracks caused by other factors have serious adverse effects on the structure.

Moisture and air are easily introduced into the cracks and excited parts generated in the above-described structures, and the moisture and air introduced therein promote the weathering of the concrete of the structure and cause corrosion of the reinforcing bars, which have a fatal effect on the life and safety of the structure. do.

As a method for repairing cracks generated on the surface of the concrete structure as described above, a packer is usually used.

In the crack repair method using the packer, a tubular packer is press-fitted into the crack, and an injection device filled with the repair liquid is connected to the packer to supply the repair liquid at a high pressure to fill and crack the crack.

Such a crack repair packer and a method using the same have been previously filed by the present applicant (Patent Publication No. 2002-30054), it is shown in Figures 1 to 5.

Packer and crack repair method as shown, first to form a hole with a constant diameter / depth in the crack gap 110 of the concrete structure 100, to form a core in the bottom surface of the formed hole and then remove the dust and the like Clean.

Then, as shown in FIG. 1, the hollow rubber sleeve 101 is coupled to the formed hole, and the hollow packer body 10 is coupled to the rubber sleeve 101, as shown in FIG. 2. The injection device 300 is connected to the nozzle unit 12 to inject the repair solution into the crack gap 110.

After injecting the repair solution into the crack gap 110, as shown in FIG. 3, the nozzle unit 12 is capped by the stopper member 20, and cured until the injected repair solution is cured.

After the repair solution is cured, the packer body and the rubber sleeve protruding from the concrete structure surface are cut and finished as shown in FIG. 4.

This packer and construction method is compact and simple in structure, so it can cope with the occurrence of difficult corners or uneven parts, which has the advantage of excellent workability.However, after injecting the repair solution, the closed packer body and the rubber slip part are finished. In order to cut, it is necessary to wait 2 to 3 days for the injected repair liquid to harden, so there is a limit in shortening the construction period.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an improved micro packer assembly and a low to medium pressure crack repair method using the same.

Another object of the present invention is to provide an improved micro packer assembly and a low-medium pressure crack repair method using the same to simplify the construction and construction.

1 to 4 is a cross-sectional view showing a construction state of a conventional packer assembly,

5 is a flow chart for explaining the conventional crack repair method,

Figure 6 is an exploded perspective view showing a packer assembly of the present invention,

7a and 7b is a cross-sectional view showing the main portion of the packer assembly of Figure 6,

8A to 8F are schematic cross-sectional views for explaining the present invention crack repair method,

9 is a sectional view of the main parts showing another embodiment of the packer assembly of the present invention;

10 is a cross-sectional view showing the installation state of the confirmation window,

11 is a block diagram showing the construction method of the present invention.

* Explanation of symbols for main parts of the drawings

600 ... packer assembly 611 ... joint

612 Nozzle section 613 Wrench connection

620 ... mounting rod 621 ... mounting part

622 head 630 rubber sleeve

40 Confirmation window 100 Structure

101 hole 110 crack crack

In the present invention for achieving the above object in the packer assembly coupled to the hole formed in the crack gap to inject a repair solution into the crack gap of the building,

A packer body having a coupling part coupled to the hole and a nozzle part connected to the repair liquid injector, the hollow body communicating with the crack gap at a center thereof;

It is characterized in that it comprises a; rod rod to prevent the leakage of the repair liquid injected by sliding press-fitted into the hollow of the packer body.

The end of the packer body is formed with a smaller diameter than the rod, so that the coupling of the rod is more stable.

In addition, it is further provided with a hollow rubber sleeve coupled to the hole and the coupling portion of the packer body, thereby ensuring close contact with the hole and enables the use of the assembly despite the formation of errors in the formed hole.

Medium and low pressure crack repair method using the present invention micro-packer assembly to achieve the above object comprises the steps of forming a hole with a predetermined diameter and a predetermined depth in the crack gap of the concrete structure;

Coupling a hollow rubber sleeve to the hole;

Coupling a hollow packer body having a coupling portion coupled to the rubber sleeve and a nozzle portion connected to a repair liquid injector to the rubber sleeve;

Injecting a repair liquid through the nozzle unit into the crack gap;

Injecting the rod into the hollow of the packer body after injecting the repair solution;

And cutting and finishing the packer body and the rubber sleeve protruding from the surface of the concrete structure.

The finishing step may cut the packer body and rubber sleeve protruding on the surface of the concrete structure before the repair liquid is cured.

According to the above characteristics of the present invention, the packer assembly of the present invention is inserted into the hollow of the packer body after the repair liquid is injected, so that the leaking of the repair liquid is prevented even if the packer body protruding from the concrete surface is cut out before the repair liquid is cured. . Therefore, the air of the crack repair work can be greatly shortened.

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

The packer assembly of the present invention is suitable for injecting a repair liquid into a building crack, and also greatly shortens the air of the crack crack repair work.

6, 7 and 8c showing the packer assembly of the present invention, it is coupled to a hole 101 formed in the crack gap 110 to inject a repair solution into the crack gap 110 of the building 100. . The crack gap 110 communicates with the bottom surface of the formed hole 101.

The packer assembly 600 is a hollow rubber sleeve 630 is coupled to the hole 101 and the thread portion 631 is formed on the inner circumferential surface, and a screw coupling portion 611 screwed to the screw portion 631; The hollow packer body 615 having a nozzle portion 612 connected to the repair liquid injector 300 (refer to FIG. 8D), and leakage of the repair liquid injected into the hollow of the nozzle part 612 and the coupling part 611. It is provided with a bar rod 620 to prevent.

The screw portion 631 of the rubber sleeve 630 is formed of a light-sensitive lower side (上 廣 下 狹), when the screw coupling portion 611, as shown in Figure 7b and 8c, screw portion 631 The lower portion of the) is radially expanded to be in close contact with the hole 101 formed in the structure, accordingly, the rubber sleeve 630 is prevented from being separated from the hole 101 when the maintenance liquid is injected at a constant pressure.

In addition, a flange portion 632 is formed at the tip end of the rubber sleeve 630 to prevent excessive entry into the hole 101.

Wrench fastening portion 613 is protruded around the central portion of the packer body 615 to be screwed to the rubber sleeve 630 using a tool such as a wrench (not shown). The packer body 615 is formed of a plastic material.

The rod 620 is composed of a hook portion 621 coupled to the hollow of the packer body 615, and a head portion 622 having a large area to press.

As shown in FIG. 8C, the packer assembly 600 couples the rubber sleeve 630 to the hole 101 formed in the concrete structure 100, and the screw coupling part 611 of the packer body 615. ) Is coupled to the rubber sleeve 630 using a wrench (not shown). In this case, as shown in FIGS. 7B and 8D, the screw portion 631 of the rubber sleeve 630 is formed as a light beam bottom side, and thus the lower end portion is extended radially to the inner circumferential surface of the hole 101 as the packer body 615 is coupled. It will be in close contact.

As shown in FIG. 8D, after the packer assembly 600 is coupled to the structure, the injector 300 is coupled to the nozzle unit 612 to maintain the repair liquid 200 in the crack gap 110 at a low to medium pressure (100 kg / 2 cm 2).

After the injection is completed, as shown in FIG. 8E, through the nozzle unit 612, the rod 622 in the hollow of the packer body 615 is press-fitted. At this time, the rod 622 is press-fitted to the hollow of the packer body 615 and also has a small cross-sectional area, so that it is not separated from the packer body 615 due to the repair liquid 200 injected at a low and medium pressure (100 kg / cm 2). No.

The packer assembly 600 is economically advantageous because it is formed of rubber or plastic material, and the structure is simpler and more economically advantageous than the conventional packer by preventing leakage of the repair liquid 200 by the rod 620.

In particular, immediately after injecting the repair solution 200, even if the packer assembly 600 protruding from the surface of the structure 100 is cut out, the outflow of the repair solution 200 is prevented by the mounting rod 620. Accordingly, the air of the crack repair work can be shortened.

On the other hand, in the packer assembly of the present invention, the end of the packer body 615 is formed with a smaller diameter (see reference numeral 614) than the diameter of the hook portion 621 of the rod rod 620 as shown in FIG. Is preferred. In this case, the front end of the rod 620 is more firmly coupled to the small diameter portion 614, so that the holding and holding of the rod 620 is more stable.

On the other hand, the crack repair method of the concrete structure using the packer assembly 600 of the above structure is as follows.

8A to 8F and 11, first check the installation position of the packer by checking the size of the crack width and length, the crack state, the crack position and the thickness of the structure.

Subsequently, as shown in FIG. 8A, the hole 101 is drilled into the crack gap 110 of the concrete structure 100 at a diameter of about 10 mm, a depth of about 10 to 15 mm, and a 20 to 45 cm interval ( 120). At this time, the crack gap 110 in the hole 101 is blocked by the crushed concrete powder.

Subsequently, as shown in FIG. 8B, a hole 101 having a depth of about 15 to 20 mm is formed deeper than the hole 101 by using the hollow core bit 130 mounted to the drill in the hole 101. The concrete core portion 102 is cut by applying an impact. In this case, the crack gap 110 appearing in the cross section of the cut core portion 102 is not closed by concrete dust or the like.

In this state, the concrete ground powder or dust is cleaned along the crack gap 110 on the surface of each of the perforated holes 101 and the structure 100 using a blower or the like.

Subsequently, as shown in FIGS. 8C and 8D, the hollow rubber sleeves 630 having the screw parts 631 formed on the inner circumferential surface by upper and lower narrowings are formed in the respective perforated holes 101. , The packer body 615 is screwed to the rubber sleeve 630.

When the packer body 615 is screwed to the rubber sleeve 630, as shown in FIG. 8D, the lower end portion of the rubber sleeve 630 is radially expanded so that the packer body 615 is tightly fixed to the inner circumferential surface of the hole 101.

Thus, after the packer body 615 is coupled to each hole 101, the confirmation window 40 is attached along the crack gap 110 at regular intervals.

As shown in FIG. 10, the confirmation window 40 includes a transparent boss 41 having a water-retaining liquid receiving space 41a communicating with a crack gap 110 between the holes 101, and the boss 41. It consists of a flange 42 connected to the circumference, and the double-sided adhesive agent 45 attached to the bottom face of the flange 42.

The confirmation window 40 allows to confirm whether or not the repair liquid 200 injected into the adjacent crack gap 110 is supplied when the repair liquid 200 of the low and medium pressure is injected into the crack gap 110.

That is, when the repair liquid 200 is injected through the packer body 615, the repair liquid 200 is supplied into the accommodation space 41a of the adjacent confirmation window 40 while the repair liquid 200 is supplied along the crack gap 110. It is possible for the operator to confirm this by checking whether the injection of the repair liquid (200).

After the packer assembly 615 and the confirmation window 40 are installed, the structure surface is sealed along the crack gap 110.

Thereafter, as shown in FIG. 8D, the repair solution injector 300 is connected to the nozzle unit 612 to inject the repair solution 200 into the crack gap 110 at a low to medium pressure (100 kg / cm 2). At this time, the repair liquid 200 is supplied along the crack gap 110 communicated with each other by the injection pressure, and when the repair liquid 200 is supplied to the receiving space 41a of the confirmation window 40 attached to the structure 100 surface. Inject the repair solution 200 until.

As such, when the repair liquid 200 is injected and the repair liquid 200 is supplied to the accommodating space 41a by observing the adjacent confirmation window 40, as shown in FIG. 8E in the hollow of the injected packer body 615. Insert the rod 620 together. At this time, the rod 620 is firmly inserted, and the end of the rod 620 protrudes from the lower end of the packer body 615 to close the hollow.

On the other hand, as shown in Figure 9, the lower end of the packer body 615, when the small diameter 614 is formed so that the end of the rod 620 is more firmly inserted to maintain a stable plugged state.

Subsequently, the repair solution 200 is injected through the adjacent packer assembly 600 as described above.

After the injection of the repair solution 200 is completed, the packer body 615 and the mounting rod 620 protruding from the surface of the structure are cut and ground as shown in FIG. 8F even before the repair solution 200 is cured. To the end. At this time, the cut surface is not leaked even before the repair liquid 200 is cured because the hollow of the packer body 615 is blocked by the rod 620.

In the above, after injecting the repair liquid 200, the timing of cutting and finishing the packer assembly 600 protruding to the surface of the structure can be performed irrespective of before and after curing of the repair liquid 200.

In this embodiment, the rod 620 may be formed of wood, metal or synthetic resin. In addition, a repair material such as epoxy or urethane was used as the repair solution 200.

Needless to say, the present invention as described above is not limited to the above embodiment and can be practiced with many modifications. For example, in the above embodiment, the rubber sleeve 630 is first coupled to the hole formed in the crack gap, and then the packer body 615 is coupled. However, the packer body 615 may be directly coupled to the hole 101. It may be. In this case, the diameter of the coupling part 611 of the packer body 615 is slightly larger than the diameter of the hole 101, and preferably formed of a material capable of shrinking / expanding.

The present invention as described above has the following advantages.

First, the packer assembly of the present invention is small in size and simple in structure, so that it is possible to cope with the occurrence of cracks in difficult corners or uneven parts, which is excellent in workability.

Second, the use of the rod to prevent the back flow of the repair solution is simple and economically advantageous, and furthermore, it is advantageous to shorten the air because the finishing work is possible even before the repair solution is cured.

Third, the present invention is to assemble the packer using a tool such as a wrench, so that even non-skilled person can easily work, and shorten the working time.

Claims (5)

In the packer assembly coupled to the hole formed in the crack gap to inject the repair liquid into the crack of the building, A packer body having a coupling part coupled to the hole and a nozzle part connected to the repair liquid injector, the hollow body communicating with the crack gap at a center thereof; Micro-packer assembly, characterized in that it comprises a; rod rod to prevent the leakage of the repair liquid injected by sliding indentation coupled to the hollow of the packer body. The micropacker assembly according to claim 1, wherein the hollow end of the packer body has a smaller diameter than that of the rod. The micropacker assembly according to claim 1 or 2, further comprising a hollow rubber sleeve coupled to the hole and to which the coupling portion of the packer body is coupled. Forming a hole with a predetermined diameter and a predetermined depth in the crack gap of the concrete structure; Coupling a hollow rubber sleeve to the hole; Coupling a hollow packer body having a coupling portion coupled to the rubber sleeve and a nozzle portion connected to a repair liquid injector to the rubber sleeve; Injecting a repair liquid through the nozzle unit into the crack gap; Injecting the rod into the hollow of the packer body after injecting the repair solution; And cutting and finishing the packer body and the rubber sleeve protruding on the surface of the concrete structure. 5. The method of claim 4, wherein the finishing step comprises cutting the packer body and the rubber sleeve protruding from the surface of the concrete structure before the repair solution is cured. 6.