JPH07324495A - Repair method of wall face - Google Patents

Abstract

PURPOSE:To increase the fixing strength of an anchor member. CONSTITUTION:A connection hole inserting in a concrete underlay 2 is formed by piercing an exterior material 6 and a connection material 4 by a rotary drill, on a wall face on which the exterior material 6 is stuck on the concrete underlay 2 through the connection material 4. An anchor member 26 provided with a widening structure having a fixing plate 27 crossing at right angles to the lengthwise direction at the front end side, is inserted in the connection hole 24. The widening structure of the anchor member 26 is widened and the fixing member 26 is fixed in the concrete under lay 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repairing method for preventing the exterior materials and the like from falling off due to cracks or peeling of the wall surface of a concrete structure.

[0002]

2. Description of the Related Art In a concrete structure, an exterior material such as a brick is attached to a concrete base through a bonding material such as mortar. However, in this type of concrete structure, changes in weather conditions and composition Cracks are likely to occur in the concrete base material and the joint material such as mortar due to chemical changes in the ground or vibration such as an earthquake, and when rainwater or the like penetrates through the cracks, between the concrete base material and the joint material such as mortar, or between the joint material and the exterior. So-called floating easily occurs due to peeling between the material. If such cracks or floats occur, the bonding strength between the concrete base and the exterior material, etc. will be significantly reduced, and as a result, the exterior material, etc. will fall on the wall facing the sidewalk, resulting in frequent accidents resulting in personal injury. It is in the present situation and has become a big social problem.

In order to prevent such an accident, conventionally,
The peeling site is identified by visual inspection, a percussion method that hits the exterior material surface to distinguish by sound changes, or a non-contact inspection method using infrared rays, etc., and an anchor bolt having an expansion structure is driven into the site to concrete base and mortar. We were doing repairs to join the etc. together.

As such a wall surface repairing method, for example, Japanese Utility Model Application No. 59-11441 (Japanese Utility Model Application No. 60-1234).
No. 15) Microfilm, and those described in Japanese Patent Application No. 62-41931 (Japanese Utility Model Publication No. 63-148749).

[0005]

In the conventional wall repair method described above, since the expansion structure of the anchor bolt is a tapered tip in the expanded state, the expansion structure is expanded when the expansion structure is expanded. There are problems that minute cracks and the like are generated in the concrete foundation around the open structure and the resistance to the pulling direction is low, so that the anchor bolts have low fixing strength.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a wall surface repairing method in which the anchor member has a high fixing strength.

[0007]

In order to solve the above-mentioned problems, the wall surface repairing method according to the present invention employs the following means.

That is, according to the first aspect of the present invention, a communication hole is formed on the wall surface of the concrete underlayer on which the exterior material is adhered via the joining material so as to penetrate the exterior material and the joining material into the concrete underlayer by a rotary drill device. , An anchor member having an expanding structure having a separate locking member orthogonal to the length direction on the tip side is inserted into the communication hole to expand the expanding structure of the anchor member and separate locking It is characterized in that the anchor member is fixed to the concrete foundation by causing the member to bite into the concrete foundation.

According to a second aspect of the present invention, in the wall surface repairing method of the first aspect, after the anchor member is formed into a tubular shape and fixed to a concrete foundation, a sealing material is filled from the rear end side of the anchor member to form a sealing material. Through the through hole of the anchor member to the outside of the anchor member.

[0010]

According to the above-mentioned means, according to the first aspect, when the expanding structure of the anchor member is expanded, the plate-shaped locking member acts like a cutting tool on the concrete substrate in a direction orthogonal to the length direction of the anchor member. Bite into. Therefore, minute cracks and the like hardly occur in the concrete base material around the expansion structure of the anchor member, and the resistance force in the pulling direction of the anchor member becomes high.

In the second aspect, the sealing material bonds the communication hole and the anchor member.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the wall repair method according to the present invention will be described below with reference to the drawings.

1 to 7 show an embodiment of the present invention. An exterior material 6 such as a porcelain tile is attached to a concrete underlayer 2 via a bonding material 4 such as mortar to form a wall surface 8. In FIG. 1, reference numeral 9 indicates a joint. On the wall surface 8, the crack C and the peeled portion P are identified by means such as visual inspection, whole surface percussion method, or non-contact inspection method.
In this example, the peeling site P includes a peeling site P ₁ between the concrete base 2 and the bonding material 4, and a relatively small-scale peeling site P ₂ between the bonding material 4 and the exterior material 6. There is.

At the peeling portion P, the rotary drilling device 10 pierces the surface of the exterior material 6. The rotary drill device 10 is provided with a drill 14 having a through hole 12 in the axial direction, and a drill bit 16 formed by sintering diamond grains is provided at the tip of the drill 14. The drill bit 16 has a slit-shaped discharge port 16a communicating with the through hole 12 for discharging the cooling fluid. In the rotary drill device 10, reference numeral 17 indicates a drive switch, and reference numeral 19 indicates a power cord of an electric motor (not shown).

The cooling fluid is water or mist.
Is available. In this example, the mist generating device 20 is built in the drill device body 18 so as to be operable from the outside,
The mist M generated here is, for example, the drill device body 18
It is adapted to be guided to the drill 14 via a supply pipe 22 arranged inside. When water is used as the cooling fluid, it is desirable to use a supply means such as a metering pump so as not to reduce the cutting performance of the drill bit 16 due to excessive supply. The details of the structure for supplying the mist generator 20 and the mist M will be described later.

By using the rotary drill device 10 as described above, it is possible to satisfactorily perform drilling even when the exterior material 6 is a porcelain tile, glass, or a hard non-metallic material such as stone or ceramic. That is, in such a work material, a vibration drill or the like breaks and it becomes impossible to pierce,
Due to the high machinability due to the diamond grains and the frictional heat suppressing effect due to the cooling fluid, it is possible to perforate without causing cracks or the like.

When a communication hole 24 penetrating the exterior material 6 and the joining material 4 and entering the concrete base 2 is formed, FIG.
As shown in, the tubular anchor member 26 having a diameter slightly smaller than the communication hole 34 and a little shorter than the communication hole 34 is inserted. At the tip of the anchor member 26, a reduced diameter portion 26a is formed and a reduced diameter reduced portion 26b which is further reduced in diameter is formed.
A substantially C-shaped plate-shaped locking member 27 is fitted on the outer surface of the above so as to be orthogonal to the length direction of the anchor member 26. Further, through holes 26c, 26c are formed on the side surface of the anchor member 26 so as to face each other in the radial direction,
A taper portion 26d and a flange portion 26e are formed at the rear end portion so as to spread toward the end.

At the open end of the communication hole 24, a large-diameter recess 24 for locking the flange portion 26e of the anchor member 26 is formed.
a is formed.

After inserting the anchor member 26, as shown in FIG. 4, a tapered pin 28 is driven from the rear end side with a jig or the like. Since the collar portion 26e is locked in the recess 24a, the anchor member 26 can be connected to the communication hole 2 by merely driving the pin 28.
4 and the posture is corrected.

The reduced diameter portion 26b is expanded by the pin 28, and the locking member 27 is expanded in the radial direction of the anchor member 26 accordingly. Thereby, the locking member 2
7 bites into the concrete base 2 at a substantially right angle like a knife. Therefore, minute cracks and the like hardly occur in the concrete base 2 around the expansion structure of the anchor member 26, the resistance force in the pulling direction of the anchor member 26 increases, and the anchor member 26 is firmly locked.

As a result of the experiment, in the case of the size of 6φ, the conventional one has a tensile strength of about 30 kg, but in the case of the present application, the biting dimension of the locking member 27 into the concrete base 2 is 0.1 mm. 100kg ~ 150kg
It was confirmed to have a tensile strength of.

By inserting the pin 28, the communication hole 24
At the same time that the anchor member 26 is fixed to
Concrete base 2 by sandwiching by the collar portion 26e
An integral bond between the exterior material 6 and the bonding material 4 is obtained.
A space is secured between the tip of the anchor member 26 and the depth end of the communication hole 4.

After fixing the anchor member 26, a sealing material 30 is filled from the rear end of the anchor member 26 as shown in FIG. The anchor member 26 has a tapered portion 26.
Since the shake is stopped by d and the collar portion 26e, a uniform clearance is formed between the d and the flange 26e. As a result, the sealing material 30 fills the inside of the cylinder and then flows out of the cylinder through the through hole 26c on the front end side, and spreads all over the communication hole 24. Therefore, airtight sealing and fixing are performed. Further, the sealing material 30 is the anchor member 2
It also flows into the space secured between the tip of 6 and the depth end of the communication hole 4. The sealing material 30 is placed in this gap.
When the expansion pressure of the anchor member 26 is increased and the flow pressure is increased, even when the expansion structure of the anchor member 26 is expanded, it smoothly flows into minute cracks or the like having high flow resistance generated in the concrete base material 2 around the expansion structure. It will be.

As the sealing material 30, for example, Eposoft DS-L (trademark, manufactured by Yokohama Rubber Co., Ltd.) which is a one-component elastic epoxy injection material is suitable.

Although the sealing material 30 may be filled up to the recess 24a to seal the whole, as shown in FIG. 6, after the sealing material 30 is cured, the recess 24a is filled with a sealing member 34 such as resin putty. However, by coating the surface with the same color as the exterior material 6, it is possible to avoid deterioration of the appearance of the exterior material 6 due to the repair.

Even when the wall surface is mortar or the like, the collar portion 26e is positioned and fixed by the engagement with the mortar surface, and the portion of the mortar surface corresponding to the collar portion 26e is positioned by the pressure when the pin is driven. By filling the dents and the dents with new mortar, it is possible to make a repair with a good appearance.

As described above, the exterior material 6 at the peeling site P
And the bonding material 4 is the anchor member 26 and the concrete base 2
By being fixed to and sealed with the sealing material 30, the progress of peeling is stopped and a fall accident due to peeling of the exterior material 6 and the like is avoided. Further, since the bonding strength between the exterior material 6 and the bonding material 4 with respect to the concrete base 2 is enhanced, the wall surface 8 can have a long life.

Next, the mist supply structure of the rotary drill device 10 will be described. As shown in FIG. 7, the mist generating device 20 is roughly configured by a connecting member 40 and an adjusting member 42 that adjusts the amount of water. The connection member 40 includes a connection port 40a for connecting the mist supply path 22, a connection port 40b for connecting an air supply pipe 44 from an air compression source (not shown), and a water supply from a water source (not shown). A connection port 40c for connecting the pipe 46 is formed. In addition, the connection member 40 is formed with a guide path 40d that connects the connection port 40a and the connection port 40b, and a water reservoir 40e. Guideway 40
The d and the water reservoir 40e are communicated with each other through a communication hole 40f having a small diameter. Further, the connecting member 40 is formed with a screw hole 40g for attaching the adjusting member 42. Adjusting member 42
The male screw portion 42a screwed into the screw hole 40g of the connecting member 40, the needle portion 42b facing the communication hole 40f, and the adjusting knob 42c protruding to the outside of the drill device body 18. The amount of mist M produced is adjusted by the operation of the adjusting knob 42c. Air supply pipe 44
The compressed air flows into the guide passage 40d from the mist supply passage 2
By flowing to 2, the guide passage 40d becomes a negative pressure state, and the water whose flow rate is regulated is atomized by the needle portion 42b.

Next, a drive mechanism of the drill 14 and a structure for supplying the mist M around the drill 14 will be shown as an example with reference to FIG. Inside the tip side of the drill device body 18,
The hollow member 50 in which the drill 14 is mounted is the bearing 5
It is rotatably provided via 2, 54. The hollow member 50 is provided with a drive shaft 58 that is rotatably provided via bearings 56 and 56 and is connected to an electric motor.
It is designed to be driven via 2. Hollow member 50
A rotary connecting body 64 is fixed to the rear end of the mist passage 66 corresponding to the rotary connecting body 64.
A fixed connection body 66 in which a is formed is provided. A thrust bearing 68 is provided between the rotary connection body 64 and the fixed connection body 66, and O-rings 70 and 72 having different diameters are provided between the central portions of the two to form a two-stage sealing. Has been done. The mist supply passage 22 from the mist generating device 20 side is connected to the mist passage 66 a of the fixed connection body 66 by a connecting pipe 74. A mounting recess 60a is formed at the tip of the hollow member 50.
The taper shank portion 14a of No. 4 can be mounted, and the depth end portion can be fixed by screwing.
Further, in order to reduce the adverse effect on the mist M due to the centrifugal force and the size of the passage area, a thin tube 76 having a tapered tip with a narrow mouth is provided in the hollow member 50 at its rear end. A thin tube 80 of the same shape is provided inside the drill 14 via a spacer 78. The thin tubes 76 and 80 suppress the disappearance of the mist M.

In this example, application to a site where peeling or cracking has already occurred was illustrated, but the repairing method according to the present application can also be applied as a preventive measure to a site where peeling or cracking has not occurred. is there.

[0031]

As described above, the wall surface repairing method according to the present invention has the same features as claims 1 and 2, and the anchor is formed by the biting mode of the locking member, which is separate from the expansion structure of the anchor member, into the concrete base. Fine cracks and the like hardly occur in the concrete base material around the expanding structure of the member, and the resistance to the pulling direction of the anchor member increases, so that the fixing strength of the anchor member increases.

Further, according to claim 2, since the anchor member and the communication hole are bonded by the sealing material,
This has the effect of further increasing the fixing strength of the anchor member.

[Brief description of drawings]

FIG. 1 is a state diagram before punching showing an embodiment of a wall surface repairing method according to the present invention.

FIG. 2 is a schematic cross-sectional view in a punched state.

FIG. 3 is a schematic cross-sectional view showing a step of fixing an anchor member.

FIG. 4 is a schematic cross-sectional view showing the step of fixing the anchor member and the step of injecting the sealing material, following FIG. 3;

5 is a schematic cross-sectional view showing the step of injecting the sealing material, which is subsequent to FIG.

FIG. 6 is a schematic cross-sectional view showing the step of injecting the sealing material, which is subsequent to FIG.

FIG. 7 is a schematic sectional view of a mist generation device of a rotary drill device.

[Explanation of symbols]

 2 Concrete base material 4 Joining material 6 Exterior material 8 Wall surface 10 Rotary drill device 24 Communication hole 26 Anchor bolt 27 Locking member 30 Sealing material

Claims (2)

[Claims] 1. A communication hole that penetrates the exterior material and the joining material with a rotary drill to enter the concrete foundation is formed on the wall surface of the concrete underlayer on which the exterior material is attached via a joining material, and a long hole is provided on the tip side. An anchor member having an expanding structure having a separate locking member orthogonal to the depth direction is inserted into the communication hole,
A wall surface repairing method characterized in that the anchor member is fixed to the concrete ground by expanding the structure of expanding the anchor member and allowing a separate locking member to bite into the concrete ground. 2. The wall surface repair method according to claim 1, wherein the anchor member is formed into a tubular shape and fixed to a concrete base, and then a sealing material is filled from the rear end side of the anchor member,
A wall surface repairing method characterized in that the sealing material is caused to flow to the outside of the anchor member on the tip side of the anchor member.