JP2000297539A - Repair construction method for floating part of wall or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repair a floating part rapidly. SOLUTION: A valve 7a of an injection nozzle 7 is closed, a valve 6a of a suction nozzle 6 is opened, and the inside of a space part S at a floating part 5 of a wall is sucked by the suction nozzle 6. Then, the thickness of the space part S at the floating part 5 is measured. After suction is stopped, the valve 7a is opened with the valve 6a kept open, and adhesive agent 9 of an amount calculated based on the thickness of the space part S and the area of the floating part 5 is injected from the injection nozzle 7. After injection, the inside of the space part S is sucked again with the suction nozzle 6 so as to distribute the adhesive agent 9 evenly through the entire surface of the space part S. Tile joints are sealed through air-tight layer 8 beforehand. Such a state is maintained until a curing time for the adhesive agent 9 is passed. After the adhesive agent 9 is cured, the nozzles 6 and 7 are removed, the holes are buried, and the air-tight layer 8 is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a floating portion such that the floating portion such as an inner or outer wall of a building or a floor is filled with an adhesive and repaired.

[0002]

2. Description of the Related Art In a building structure of a building, the entire structure repeatedly undergoes thermal expansion and contraction due to a change in temperature or the like. There is a case where a phenomenon that a so-called floating phenomenon occurs due to interface separation from the structure. Such a phenomenon of floating, for example,
In the case of the outer wall, it occurs at the interface between the tile-attached mortar and the base mortar and at the interface between the tile-attached mortar and the concrete. If the floating is left as it is, there is a possibility that the tiles will fall off. Therefore, it is necessary to repair the portion where the floating occurs.

Conventionally, repair of a portion where a floating occurs (hereinafter referred to as a floating portion) is performed by the following four methods.

(A) A method of perforating a floating portion from the outside, and injecting a high-viscosity adhesive under pressure into the floating portion to bond the floating portion. (B) A method of perforating the floating portion from the outside, injecting a high-viscosity adhesive under pressure into the floating portion, bonding the floating portion, and driving and repairing the anchor. (C) A method of perforating the floating portion from the outside, suctioning from one side and injecting a high-viscosity adhesive from the other side under pressure to adhere the floating portion (Japanese Patent Publication No. 4-18103, 7-238689, Utility Model Registration No. 3024
No. 531). (D) A method of peeling and removing the entire surface of the floating portion to form the same finishing layer as before.

[0005]

However, the above (A)
In the method (1), since a high-viscosity adhesive is injected at a high pressure, there is a problem that interface separation is promoted, and the floating portion expands or the floating portion expands. The above (B)
In the method of (1), since the anchor is fastened by penetrating the tile, there is a problem in design such that the head of the anchor is visible from the outside. Further, in the method (C),
There are many proposals such as the technology described in the above-mentioned publications, but all have poor balance of pressure between pressurization and suction,
It has not been implemented yet. That is, when performing suction and pressurization at the same time, the suction pressure causes the floating portion to come into close contact with the frame structure, making it difficult to inject the adhesive. Furthermore,
In the method (D), the work of peeling and removing the wall surface of the floating portion and the work of newly forming a finishing layer are necessary, and the work is performed by a wet method, so that the work is prolonged. There is a drawback that a large amount of industrial waste is produced.

SUMMARY OF THE INVENTION The present invention has been improved and removed in view of the above-mentioned problems, and it is possible to reliably repair the floating portion by appropriately performing suction and injection according to the condition of the floating portion. It is an object of the present invention to provide a method of repairing a floating portion of a wall or the like.

[0007]

The method of repairing a floating portion of a wall or the like according to the present invention is directed to a method of repairing a floating portion of a wall or the like by injecting an adhesive into a gap of the floating portion of a wall or the like. A hole is provided in each of the upper and lower portions of the portion, an adhesive is injected under pressure from the lower hole, and then suction is performed from the upper hole to spread the adhesive in the gap into the gap. .

According to the method of the present invention, when the adhesive is injected into the gap from the lower hole, the inside of the gap communicates with the atmosphere through the upper hole of the floating portion, so that the adhesive is injected into the gap. Even if the agent is pressed in, the gap expands (swells)
Nothing.

According to the present invention, the adhesive is injected under pressure from the lower hole of the floating portion, and then the adhesive is spread from the upper hole to spread the adhesive in the void into the void. It can be spread sufficiently inside the department. In this case,
A pad with an adhesive injection nozzle may be applied around the hole for injection, and the nozzle may be inserted into the hole for injection.

In the present invention, the amount of retreat of the floating portion caused by the suction of air from the gap may be determined, and an amount of adhesive corresponding to the retreat may be injected into the gap.

The adhesive used in the present invention has a viscosity of 50.
A fast-curing material having a hardening time of 0 cP or less and a curing time of 30 minutes or less is preferable.

In the present invention, the suction after the injection is continued until the adhesive is cured, so that the adhesive can be settled and the time can be shortened, and the effect is maximized.

In the present invention, the adhesive may be injected into the gap by an injection means having a function of sucking back when the adhesive is excessively injected into the gap.

In the method of the present invention, it is preferable that a peelable airtight layer is formed on the front surface of the floating portion so as to prevent air in the gap from leaking in the suction and adhesive injection steps. This airtight layer may be peeled off after the repair is completed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below based on the embodiments of the invention shown in the drawings. FIG. 1 is a vertical cross-sectional view of a tile wall surface in the middle of a repair method according to an embodiment of the present invention. FIG. 1 is a schematic diagram.
The gaps S are illustrated in an enlarged manner. The actual spacing of the gaps S depends on the gap area and the rigidity of the wall surface, but is about 0.5 mm.

In the present embodiment, first, a portion (floating portion 5) of the tile 2 on the tile wall surface 1 and the mortar 10 stuck from the base mortar 4 of the building frame 3 is detected by flaw detection.
The area where the floating portion 5 exists is measured. The measurement is performed using a diagnosis by a percussion test hammer, an infrared diagnostic method, an ultrasonic diagnostic method, or the like. As a result of this measurement, the area of the floating portion was 2 m
If it is determined that the number exceeds ² , it is more efficient to peel off and remove the entire floating portion 5 to newly construct the same tile wall surface 1. This is because the peeling area occupying the whole wall is large,
This is because the workability and economical efficiency required for the replacement are improved.

Therefore, in this embodiment, repair of a relatively small portion where the area of the floating portion 5 is less than 2 m ² is targeted.

After the area of the floating portion 5 is measured, pressurizing and suctioning points where efficient adhesive injection can be performed are set.

Next, perforations are made in the joints of the tile 2 at the set suction location and pressurization location. As the drill for performing this drilling, a drill having a small vibration is used in order to prevent the floating portion 5 from being disintegrated by vibration. Floating part 5 for drill cooling
It is preferable to use air or alcohol that does not stay in the void S. Further, it is preferable to use a drill of a dust suction type so as to prevent dust from entering the gap.

After drilling, the suction nozzle 6 is attached to one hole, and the injection nozzle 7 is attached to the other hole. Nozzle 6,
7 is provided with valves 6a and 7a. The suction nozzle 6 is connected to a vacuum pump (not shown), and the injection nozzle 7 is connected to an adhesive pressure injection device (not shown).

Next, or prior to this, an airtight layer 8 is formed by applying a resin-based material rubber latex or strippable paint to the surface region of the floating portion 5 and the periphery thereof. The airtight layer 8 prevents air leakage and leakage of the adhesive 9. As the strippable paint, vinyl resins, acetylcellulose, synthetic rubber latex, and the like are known, and these materials can easily remove the coating film after use. It is sufficient if the airtight layer 8 is provided so as to cover the joints of the tile 2, and it is not necessary to form the airtight layer 8 on the entire surface of the floating portion 5.

Thereafter, a measuring device for measuring the retreat amount of the floating portion is installed, the valve 6a is opened, the valve 7a is closed, and suction from the nozzle 6 into the gap S is performed. Thereby, the floating portion 5
Adhere to the underlying mortar 4. At this time, the thickness of the gap S is obtained from the measuring instrument. Thereafter, the suction is stopped. In addition,
Valve 6a is left open.

Next, the valve 7a is opened and the pressure injection device is operated to inject the adhesive 9 from the nozzle 7 under pressure.
The gap 9 is filled with the adhesive 9.

In this case, since the space S is open, the adhesive 9 enters the space S without expanding the space S. If the suction from the nozzle 6 is continued also in this injection step, the floating portion 5 comes into close contact with the base mortar 4, and the adhesive hardly spreads in the void S. On the other hand, if the suction is stopped in the injection step, the injected adhesive spreads widely in the gap S as described above, and the injection is performed smoothly.

The adhesive preferably has a viscosity of 500 cP or less and has a hardening time of 30 minutes or less. For example, JIS A60
24 epoxy-based adhesives or acrylic-based adhesives can be used. Since the curing time varies depending on the air temperature and the temperature of the wall surface, it is preferable to use an adhesive whose curing time can be adjusted by a mixing ratio or a curing aid.

The adhesive 9 injected into the gap S from the lower injection nozzle 7 has a low viscosity and accumulates in the lower portion of the gap S. After the injection of the adhesive, the valve 7a is closed, and the vacuum pump is operated to suck the inside of the gap S. As a result, the floating portion 5 is attracted toward the base mortar 4, and the adhesive 9 is spread over almost the entire area of the void S. When a small amount of the adhesive is injected, the excess adhesive is sucked and discharged from the nozzle 7 by opening the suction nozzle 6 or the valve 7a and then operating the suction-back function.

This suction state is maintained until the adhesive 9 is cured, and after the curing time of the adhesive 9 has elapsed, the nozzles 6 and 7
Is removed to close the perforation mark, and the airtight layer 8 such as strippable paint is peeled off. As a result of this repair work, the tiles 2 of the floating portions 5 separated from the base mortar 4 of the building frame 3 by the adhesive 9 are bonded to the base mortar 4 by the adhesive 9.
Is integrated again.

The above-mentioned vacuum pump is 8 kP
Those capable of sucking up to a degree of vacuum higher than a are preferable. It is preferable to provide a switching cock for preventing excess adhesive from being sucked into the pump, a tray for receiving adhesive, and the like, on the front side of the vacuum pump.

In the above repair method, the amount of the injected adhesive can be roughly estimated, for example, as follows.

That is, while setting the nozzles 6 and 7,
After forming the airtight layer 8, the valve 7a is closed and the valve 6a is opened,
The inside of the gap S is sucked by operating the vacuum pump. Then, the floating portion 5 comes into close contact with the base mortar 4, and the floating portion 5 retreats. The amount of retreat of the floating portion 5 is measured, and the volume of the void portion S is roughly estimated from the amount of retreat and the area of the existing region of the void portion S (this is known by flaw detection of the first floating portion 5). You. The volume of the gap S or a slightly larger volume is defined as the injection amount of the adhesive.

After inserting the nozzles 6 and 7 into the holes of the floating portion 5, it is necessary to seal between the periphery of the nozzles 6 and 7 and the inner periphery of the hole. A pad inserted into the portion may be used. This pad is brought into close contact with the front surface of the tile wall.

As the above-mentioned adhesive injecting device, rubber,
It is preferable that the adhesive is injected by a restoring force of a spring or compressed air, and that the pressure adjustment and the pressure speed can be adjusted. Further, a grease pump or an air-type pressure pump may be used. It is desirable that the injection device has a mechanism for sucking back excess adhesive when it is injected.

Incidentally, an anchor pin may be used in combination in case of poor adhesion. As this anchor pin, an anchor with a core rod, which is cheaper than an anchor pin with an inlet, is preferable. It is preferable to attach the anchor after injecting the adhesive and using the adhesive together.

By the way, the present invention is not limited to the above-described embodiment, and can be appropriately changed. For example, in the above-described embodiment, the case of the tile wall surface 1 has been described, but this includes the outer wall and the inner wall, and the same applies to the case of the floor. The same applies to the case where the wall surface, floor, and the like are formed of a finishing material other than tiles.

[0035]

As described above, according to the invention of the present invention, a hole is provided above a floating portion such as a wall so as to communicate with the atmosphere, and an adhesive is injected from a hole below the floating portion. Therefore, the floating portion does not swell or expand due to the injection of the adhesive. Also, by injecting a low-viscosity and fast-curing adhesive, and then continuing suction until the adhesive is cured, the adhesive is prevented from sinking and curing for curing is not required, and construction work is not required. Shortening and efficiency improvement are realized.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a tile wall surface showing a construction method according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tile wall surface 2 Tile 3 Building frame 4 Base mortar 5 Floating part 6,7 Nozzle 8 Airtight layer 9 Adhesive 10 Adhesive mortar

Claims (6)

[Claims] 1. A method for repairing a floating portion such as a wall, wherein an adhesive is injected into a void portion of the floating portion such as a wall, wherein holes are respectively provided at an upper portion and a lower portion of the floating portion. Repairing a floating portion such as a wall, characterized by injecting pressure into the cavity and then applying suction from the upper hole to spread the adhesive in the cavity into the cavity. 2. A floating portion of a wall or the like according to claim 1, wherein a pad with an adhesive injection nozzle is applied around the hole for injection and the nozzle is inserted into the hole for injection. Repair method. 3. The method according to claim 1, wherein, prior to the injection, air in the gap is suctioned, and a retreat amount of the floating portion caused by the suction of the air is obtained, and an amount of the adhesive corresponding to the retreat amount is determined. A method of repairing a floating portion such as a wall, characterized by injecting an agent into a void. 4. The floating part of a wall or the like according to claim 1, wherein the adhesive has a viscosity of 500 cP or less and a curing time of 30 minutes or less. Repair method. 5. The method according to claim 1, wherein the adhesive is injected into the gap by an injection means having a function of sucking back the adhesive when the adhesive is excessively injected into the gap. Repair method for floating parts such as walls. 6. A method for repairing a floating portion such as a wall according to claim 1, wherein suction after injection is continued until the adhesive is cured.