JP2588694B2 - Wall repair method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair method for preventing a falling off of an exterior material due to cracking or peeling of a concrete structure wall.

[0002]

2. Description of the Related Art In a concrete structure, an exterior material such as a brick is adhered to a concrete foundation through a bonding material such as a mortar. Cracks are likely to occur in the concrete base and mortar and other bonding materials due to chemical changes in the ground and vibrations such as earthquakes, and the penetration of rainwater etc. through the cracks causes the concrete base and mortar and other bonding materials or bonding material and exterior So-called floating due to peeling easily occurs between the material and the material. When such cracks or floating occur, the bonding strength between the concrete base and the exterior material is significantly reduced, and as a result, there are many accidents in which the exterior material etc. falls on the wall facing the sidewalk, etc., causing injury and death. At present, it is a major social problem.

In order to prevent such an accident, conventionally,
The exfoliated area is identified by visual inspection, tapping the surface of the exterior material and discrimination based on the change in sound, or non-contact inspection method using infrared rays, etc. Repairs were being performed to combine them together.

[0004] As such a wall repair method, for example, Japanese Utility Model Application No. 59-11441 (Japanese Utility Model Application Laid-Open No. 60-1234).
No. 15) microfilm, and those described in Japanese Utility Model Application No. Sho 62-41931 (Japanese Utility Model Application Publication No. Sho 63-148749).

[0005]

In the above-mentioned conventional wall repair method, since the expanding structure of the anchor bolt is a tapered split in the expanded state, it is necessary to expand the expanding structure when the expanding structure is expanded. There is a problem that minute cracks or the like are generated on the concrete base around the open structure, or the resistance to the pull-out direction is low, and the fixing strength of the anchor bolt is reduced.

Japanese Utility Model Laid-Open Publication No. 52-11867 discloses a configuration in which a pin-shaped locking member is projected and locked to a concrete foundation when the expanded structure is expanded. Since the properties of the groundwork are different due to uneven distribution of aggregates, the function of the pins as locking members is weakened, and the pins do not easily penetrate the rigid concrete ground, and the locking members have no function. There was a problem that it could occur in some cases.

[0007] The present invention has been made in view of such problems, and provides a wall repair method capable of increasing the fixing strength of an anchor member regardless of the properties of the ground on the side of a communication hole. As an issue.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, the wall repair method according to the present invention employs the following means.

According to the first aspect of the present invention, a communication hole is formed in a wall surface where the exterior material is adhered to the concrete substrate via the bonding material via a bonding material and penetrates the exterior material and the bonding material into the concrete substrate with a rotary drill device. By inserting a tubular anchor member having an expansion structure having a separate substantially C-shaped locking member orthogonal to the longitudinal direction at the distal end side into the communication hole, the expansion structure of the anchor member is expanded. The anchor member is fixed to the concrete foundation by opening and separately expanding the locking member in the radial direction so as to bite into the concrete foundation around the communication hole at substantially right angles.

According to a second aspect of the present invention, in the wall surface repair method of the first aspect, a flange portion is formed on a rear end side of the anchor member, and the anchor member is sandwiched between the flange portion and the locking member to thereby fix the anchor member. It is characterized in that it is fixed to a concrete foundation.

According to a third aspect of the present invention, in the wall surface repair method of the first and second aspects, after the anchor member is fixed to the concrete base, a sealing material is filled from the rear end side of the anchor member, and the sealing material is fixed to the anchor member. It is characterized by flowing out from the distal end side to the outside of the anchor member.

[0012]

According to the above-mentioned means, in the first aspect, when the expanding structure of the anchor member is expanded, the substantially C-shaped plate-shaped locking member expands in the radial direction of the anchor member, and the communication hole is formed. It is made to bite like a cutting tool so as to make a round around the surrounding concrete substrate and to be orthogonal to the length direction of the anchor member. Therefore, a fine crack or the like hardly occurs on the concrete foundation around the expanded structure of the anchor member. In addition, the anchor member becomes a resistance in the ring-shaped surface in the pull-out direction without being affected by the aggregate distribution. , Fixed in a state of high resistance.

According to the second aspect of the present invention, the anchor member is fixed in a state where the concrete base, the joining material, and the exterior material are sandwiched by the flange portion and the locking member.

According to the third aspect of the present invention, the anchor member is bonded and fixed to the communication hole by a sealing material.

[0015]

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

1 to 7 show one embodiment of the present invention. An exterior material 6 such as a porcelain tile is adhered to a concrete base 2 via a joining material 4 such as mortar, and a wall surface 8 is formed. In FIG. 1, reference numeral 9 denotes a joint. Cracks C and peeled portions P are specified on the wall surface 8 by means such as visual inspection, full percussion, or non-contact inspection.
The stripping portion P in this example, a peeling site P ₁ between the concrete foundation 2 and the bonding material 4 and a relatively small peeling portion P ₂ is coexistence between the bonding material 4 and the exterior material 6 I have.

At the peeling site P, a hole is drilled from the surface side of the exterior material 6 by the rotary drill device 10. The rotary drill device 10 is provided with a drill 14 having an axial through hole 12, and a drill bit 16 formed by sintering diamond grains is provided at the tip of the drill 14. A discharge port 16a for discharging a cooling fluid is formed in the drill bit 16 in a slit shape so as to communicate with the through hole 12. In the rotary drill device 10, reference numeral 17 denotes a drive switch, and reference numeral 19 denotes a power cord of an electric motor (not shown).

Water or mist is used as a cooling fluid.
Can be used. In this example, the mist generation device 20 is built in the drill device main body 18 so as to be operable from the outside,
The mist M generated here is, for example, a drill device main body 18.
The drill 14 is guided through a supply pipe 22 provided therein. 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 mist generation device 20 and the supply structure of the mist M will be described later.

By using such a rotary drilling device 10, it is possible to satisfactorily perform drilling even when the exterior material 6 is a hard non-metal material such as porcelain tile, glass, or stone or ceramic. In other words, in such a work material, it becomes impossible to drill with a vibration drill or the like,
The hole can be pierced without causing cracks or the like by the high machinability due to diamond grains and the effect of suppressing frictional heat due to the cooling fluid.

When a communication hole 24 that penetrates the exterior material 6 and the joining material 4 and enters the concrete base 2 is formed, FIG.
As shown in FIG. 7, the tubular anchor member 26 having a diameter slightly smaller than the communication hole 34 and slightly shorter than the communication hole 34 is inserted. A reduced diameter portion 26a is formed at the distal end of the anchor member 26, and a reduced diameter portion 26b whose diameter is further reduced is formed.
An expansion structure is provided in which a substantially C-shaped plate-shaped locking member 27 is fitted on the outer surface of the anchor member 26 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 in the radial direction,
A flared tapered portion 26d and a flange portion 26e are formed at the rear end.

The open end of the communication hole 24 is provided with a large-diameter concave portion 24 for locking the flange 26e of the anchor member 26.
a is formed.

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

The diameter of 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. As a result, the single plate-shaped locking member 27 bites into the concrete foundation 2 at a substantially right angle like a blade so as to make substantially one round around the expanded structure of the anchor member 26. Therefore, a minute crack or the like hardly occurs on the concrete base 2 around the expanding structure of the anchor member 26, and the locking member 27 becomes a resistance on one surface around the expanding structure of the anchor member 26. The resistance in the pull-out direction of the member 26 is increased, and a strong locking state of the anchor member 26 is obtained. In addition, the locking member 27 is expanded regardless of the properties of the side surface of the communication hole 24, and is suitably locked at a portion where the properties are stable in the concrete foundation 2, so that a predetermined fixing strength can be maintained. .

As a result of the experiment, in comparison with the conventional one having a size of 6φ having a tensile strength of about 30 kg, the one according to the present invention is such that the biting dimension of the locking member 27 with respect to the concrete base 2 is 0.1 mm. 100kg-150kg
It was confirmed to have a tensile strength of.

When the pin 28 is driven, the communication hole 24
The anchor member 26 is fixed to the
Concrete base 2 by sandwiching by flange 26e
And the joining material 4 is integrally joined to the exterior material 6.
Note that a space is secured between the distal end of the anchor member 26 and the depth end of the communication hole 4.

After the anchor member 26 is fixed, 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 run-out is stopped by the d and the flange 26e, a uniform clearance is formed with the communication hole 24. As a result, after filling the inside of the cylinder, the sealing material 30 flows out of the cylinder through the through hole 26c on the distal end side, and reaches all over the communication hole 24. Thus, hermetic sealing and fixing are performed. In addition, the sealing material 30 is used for the anchor member 2.
6 also flows into the space secured between the distal end of the communication hole 6 and the depth end of the communication hole 4. Then, the sealing material 30 is inserted into this gap.
Is filled, and the flow pressure increases, the fluid smoothly flows into fine cracks and the like with high flow resistance generated on the concrete base 2 around the expanded structure when the expanded structure of the anchor member 26 is expanded. 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 preferable.

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

When the wall surface is made of mortar or the like, positioning and fixing are performed by locking the flange portion 26e to the mortar surface, and the portion corresponding to the flange portion 26e on the mortar surface is pressed by the pressure at the time of pin driving. By filling the dents and dents with new mortar, it is possible to make a restoration that is not inferior in appearance.

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

Next, the mist supply structure of the rotary drill device 10 will be described. As shown in FIG. 7, the mist generating device 20 includes a connecting member 40 and an adjusting member 42 for adjusting the amount of water.
It is schematically composed of The connection member 40 has a connection port 40a for connecting the mist supply passage 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. The connection member 40 is formed with a guide path 40d for communicating the connection port 40a and the connection port 40b,
A water reservoir 40e is formed. The guide path 40d and the water reservoir 40e are communicated with each other by a communication hole 40f having a small diameter.
The connection member 40 has a screw hole 40g for mounting the adjustment member 42. The adjusting member 42 has a male screw portion 42a screwed into the screw hole 40g of the connection member 40.
, A needle part 42b facing the communication hole 40f, and an adjustment knob 42c protruding outside the drill unit body 18. The amount of the mist M generated is adjusted by the operation of the adjustment knob 42c. The compressed air flows into the guide path 40d from the air supply pipe 44 and flows into the mist supply path 22, so that the guide path 40d is in a negative pressure state, and the water whose flow rate is regulated by the needle portion 42b is atomized.

Next, a driving mechanism of the drill 14 and a supply structure of the mist M around the drill 14 will be described as an example with reference to FIG. Inside the tip side of the drill unit body 18,
The hollow member 50 on which the drill 14 is mounted is the bearing 5
It is provided rotatably via the two and 54. The hollow member 50 is provided with gears 60, 6 by a drive shaft 58 rotatably provided via bearings 56, 56 and connected to an electric motor.
2 is driven. Hollow member 50
A rotary connector 64 is fixed to the rear end of the drilling device.
A fixed connection body 66 in which a is formed is provided. A thrust bearing 68 is provided between the rotary connecting body 64 and the fixed connecting body 66, and O-rings 70 and 72 having different diameters are provided between the centers of the two to form a two-stage sealing. Have been. The mist supply passage 22 from the mist generation device 20 side is connected to a mist passage 66 a of the fixed connector 66 by a connection pipe 74. At the tip of the hollow member 50, a mounting recess 60a is formed.
4 can be mounted, and the depth end 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 at the distal end is fixed in the hollow member 50 at the rear end thereof. The drill 14 is provided with a narrow tube 80 of the same shape via a spacer 78 in the drill 14. The thin tubes 76 and 80 suppress the mist M from disappearing.

In this example, application to a portion where peeling or crack has already occurred is exemplified. However, the repair method according to the present invention can be applied also as a prevention to a portion where peeling or crack has not occurred. is there.

[0034]

As described above, in the wall surface repair method according to the present invention, a substantially C-shaped locking member separate from the expanding structure of the anchor member is formed around the communication hole by a ring. In this manner, the concrete base material is cut into the concrete base at substantially right angles so as to make substantially one round, so that a fine crack or the like hardly occurs on the concrete base around the expanded structure of the anchor member, and the resistance force in the pull-out direction of the anchor member increases. . Therefore, the locking member is locked without being affected by the properties of the concrete foundation, and as a result, the fixing strength of the anchor member is increased.

Further, since the anchor member is fixed by being sandwiched between the flange portion and the locking member, the bonding material and the exterior material are integrally fixed to the concrete base. There is an effect that can be.

Furthermore, since only the anchor member and the communication hole are adhered and fixed by the sealing material, there is an effect that the fixing strength of the anchor member is further increased.

[Brief description of the drawings]

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

FIG. 2 is a schematic sectional view in a perforated state.

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

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

FIG. 5 is a schematic sectional view showing a sealing material injection step following FIG. 4;

FIG. 6 is a schematic sectional view showing a sealing material injection step following FIG. 5;

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

[Explanation of symbols]

 2 Concrete foundation 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 (3)

(57) [Claims] 1. A communication hole which penetrates an exterior material and a joining material into a concrete foundation by a rotary drill device is formed on a wall surface of a concrete foundation to which an exterior material is pasted via a joining material, and has a long side at a tip end side. Presents a separate C-shape that is perpendicular to the vertical direction
That a cylindrical anchor member having a spreading structures having a locking member is inserted into the communicating hole, the radial locking member Rutotomoni another body spreading structures of the anchor member is expanded <br/> To expand
A method of repairing a wall surface , wherein an anchor member is fixed to a concrete foundation by making it penetrate into a concrete foundation at a right angle around a through hole . 2. The wall repair method according to claim 1, wherein
A collar portion is formed on the rear end side of the car member, and the collar portion is
By holding the anchor member with the locking member,
Wall repair work characterized by fixing to concrete foundation
Law. 3. The method for repairing a wall surface according to claim 1, wherein the anchor member is fixed to a concrete base, and then a sealing material is filled from a rear end side of the anchor member, and the sealing material is anchored from a distal end side of the anchor member. A wall repair method characterized by flowing out of the wall.