JPH109239A - Fixing method of anchor bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably fix an anchor bolt without dispersion in fitting accuracy by appropriately cleaning adhered stuff in a drilled hole without individual variation in fixing a chemical anchor bolt. SOLUTION: The liquid 20 (e.g. water) is poured in a drilled hole 10 in a base material to precipitate adhered stuff 50 to the drilled hole, and a capsule 40 in which the adhesive 30 (e.g. under water hardening resin) is enclosed is sunk in the drilled hole 10 after precipitation. Then, an anchor bolt 60 is inserted while breaking the capsule 40, and the anchor bolt 60 is fixed through hardening of the adhesive 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing an anchor bolt in a perforation formed in a base material such as concrete using an adhesive, and more particularly to a method for fixing an adhering substance on an inner wall of a perforation which affects the fixing strength of the anchor bolt. It is intended to perform cleaning properly.

[0002]

2. Description of the Related Art Conventionally, as a method for fixing an anchor bolt, a capsule in which an adhesive made of a reactive type curable resin is enclosed is inserted into a perforation formed in a base material such as concrete, and the capsule is overhead. A method in which a bolt is driven in such a way as to break it from the outside and a bolt fixed by hardening of the curable resin coming out of the broken capsule is known as a chemical anchor bolt or a resin anchor bolt.

[0003]

In the conventional fixing method using a so-called chemical anchor bolt, a necessary adhesive strength can be obtained unless concrete powder at the time of drilling adhered to the inner wall of the drilling is carefully removed. In some cases, anchor bolts may not be fixed sufficiently. In order to fix a large number of anchor bolts, a plurality of persons usually work to shorten the time. For this reason, it has been pointed out from the site that there is an individual difference in the degree of cleaning, which often leads to a variation in the fixing strength of the anchor bolt. In view of the above, the present invention has been proposed in view of the above-described problems, and employs a simple and accurate method for cleaning the adhered substance on the inner wall of the perforated hole, which does not cause individual differences in the work, and secures a stable anchor bolt without variation in fixing strength. The purpose is to provide a method that can do.

[0004]

According to one aspect of the present invention, there is provided a method of fixing an anchor bolt in a hole formed in a base material using an adhesive. Then, after injecting a liquid into the perforation and depositing the deposit on the inner wall of the perforation with the injected liquid, an adhesive is injected into the perforation to replace the liquid with the adhesive, and an anchor bolt is inserted. The anchor bolt is fixed in the hole by curing the adhesive. Further, according to a second aspect of the present invention, in the first aspect of the present invention, the injection of the adhesive is performed by submerging the capsule enclosing the adhesive into a perforated hole after the liquid is injected, and then breaking the capsule while breaking the capsule. This was done by inserting bolts. Claim 3
The invention described in (1) is the invention according to claim 1 or 2, wherein water is used as the injection liquid and a water-curable resin is used as the adhesive.

[0005] In the above configuration, the liquid is injected into the perforation to precipitate the deposit on the inner wall of the perforation. The liquid has a balance with the adhesive to be injected thereafter (for example, conditions that do not hinder the curing of the adhesive), but basically, any liquid that can spontaneously settle the attached matter can be used. For example, if a curable resin in water is used as the adhesive. Water can be used as the infusion liquid. In addition, the work of injecting the liquid into the perforation is not a work in which there is a difference between individuals, and anybody can remove and clean the adhering matter on the inner wall of the perforation. Injecting the liquid, compared to a method of blowing off the deposits at the time of drilling the base material with air or the like, allows more accurate cleaning because the deposits are naturally peeled off from the inner wall of the drilling holes and settled.

Therefore, even if a plurality of people are involved in the work,
It is possible to efficiently and accurately clean the adherence to the inner wall of the base material perforation, such as concrete powder, which is a factor inhibiting the curability of the adhesive of the chemical anchor bolt. Furthermore, after the deposit is deposited, the adhesive is injected and replaced with the liquid, and the anchor bolt is inserted. The anchor bolt can be fixed without any. In particular, if the adhesive is encapsulated in a capsule and submerged in the perforation after liquid injection, most of the liquid in the perforation will be discharged due to the submersion of the capsule. After that, if the anchor bolt is inserted while breaking the capsule, the adhesive fills the perforation and hardens, so that the anchor bolt can be fixed.

As the adhesive, there is, for example, a reactive adhesive represented by a two-liquid mixture type. One of the liquids is used as an injection liquid which also serves as sedimentation of deposits, and the other is put in a capsule or the like. It can also be used as an injection adhesive. Or use a one-part adhesive for the adhesive and do not react with it,
Alternatively, a liquid having an auxiliary effect can be used as the injection liquid. In addition, if the combination of the injection liquid and the adhesive is selected so as to satisfy the condition that the adhesive and the injection liquid do not mix and react with each other and that the adhesive has a certain specific gravity higher than the injection liquid, the capsule Basically, it is also possible to directly inject the adhesive into the perforation from the tip of the nozzle without using such a method.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for fixing an anchor bolt according to the present invention will be described below with reference to the drawings. In the present embodiment, a case where water is used as the liquid 20 to be injected into the perforation 10 and a water-curable resin is used as the adhesive 30 will be described first. The underwater curable resin was used by being enclosed in a glass capsule 40 as used in a conventional chemical anchor bolt. In this embodiment, a bond E manufactured by Konishi Co., Ltd. is used as the underwater curable resin.
2800 was used. Since this material is two-pack, it is separately sealed in the capsule so that the two packs do not mix. The anchor bolt is fixed by the following procedure using the underwater curable resin having such a configuration.

First, as shown in FIG. 1A, a base material (for example, in this embodiment, concrete is used as a base material)
Perforate by appropriate means. As shown in FIG. 1 (b), water is injected into the perforation 10 as the injection liquid 20 until it is almost full, and the perforated inner wall deposits (for example, concrete powder) 50 generated during the perforation are settled. In the case of water injection, tap water may be injected as it is from the end of the hose, but more preferably, it is effective if the inner wall of the perforation is washed off by vigorously spraying it like a shower. After the deposits 50 such as concrete powder have settled, a glass capsule 40 is put into the perforations 10 and submerged as shown in FIG. Due to the sinking of the capsule 40, most of the liquid 20 in the perforation 10 overflows outside the perforation, and the liquid 20 and the adhesive 3
Replace with 0.

In the present embodiment, the adhesive 30 is used for the capsule 4
At this stage, the adhesive 30 has been replaced with the liquid 20 while still being contained in the capsule 40 because it is used enclosed in the inside of the capsule 40. The size of the capsule 40 to be submerged is slightly smaller than the inner diameter of the perforation 10 and the perforation 1
If the capsule length is set to a depth of about 0 and the volume of the capsule 40 is made substantially the same as the internal volume of the perforation, the adhesive, the 30 and the liquid 20 can be exchanged more effectively. Thereafter, as shown in FIG. 1 (c), the capsule 40 is inserted into the submerged capsule 40 while rotating with the tip of the anchor bolt 60 as shown in FIG. At the time of insertion, in order to break the glass capsule 40 and mix the two liquids in the capsule 40, the anchor bolt 60 is attached to the tip of the drill and screwed in the present embodiment. I hit it.

In this embodiment, an epoxy resin bond E2800 having excellent curability in water is used as the adhesive 30. Because Bond E2800 cures in water,
Water can be used as the injection liquid 20 for settling and cleaning of the deposit 50 as in the present embodiment. Inject liquid 2
Since it is used as 0, it can be easily implemented as compared with the case where another solvent or the like is used as the injection liquid 20. Even if the water and the adhesive 30 are not completely replaced, the adhesive 30
Cures. As shown in FIG. 1D, the driven anchor bolt 60 is fixed by the curing of the adhesive 30 (in the present embodiment, a water-curable resin).

In the embodiment described above, the adhesive 30 is injected into the perforation 10 by submerging the capsule 40 containing the underwater curable resin as the adhesive 30 into the perforation 10. Is a type that does not cause a miscible reaction, and when the specific gravity difference is sufficiently larger than that of water, the adhering substance 50 in which the underwater curable resin is precipitated is injected into the perforation 10 directly from the nozzle tip while preventing the attached substance 50 from rising. Then, the water and the underwater curable resin as the adhesive 30 may be replaced. Incidentally, the bond E used in this embodiment was used.
2800 is not suitable for this method because its specific gravity is close to 1. Further, in the present embodiment, the bond E2800 is used, but any other material may be used as long as it has excellent curability in water and obtains necessary strength and the like.

In the above embodiment, the case where water is used as the injection liquid has been described, but a liquid other than water may be used. For example, 2 composed of an auxiliary agent and a main agent
In the case of a liquid-mixable curable resin, one of the auxiliary agent and the main agent may be injected into the perforation 10 as an injection liquid, and the other may be injected as an adhesive 30 into the capsule 40. In this case, since the injection liquid 20 and the liquid in the capsule 40 are mixed and hardened by the insertion of the anchor bolt 60, the mixing liquid corresponding to the liquid in the capsule 40 remains in the perforation 10. The size of the capsule 40 may be adjusted by assuming the replacement amount so that the replacement can be performed.

In consideration of the material of the base material and the like, a non-aqueous solution or the like, which is inexpensive and has a hardened inner wall for perforation, may be used in addition to water. Further, in the above embodiment, instead of water, a detergent that does not become a curable inhibitor of the adhesive,
Alternatively, by using an aqueous solution appropriately mixed with a flocculant, etc., the perforated material is more effectively cleaned by cleaning the inner wall of the perforation by peeling off the sediment from the inner wall and increasing the sedimentation speed, and sufficiently hardening the adhesive. You may be able to demonstrate.

[0015]

According to the structure of the present invention, anyone can accurately clean the adhering matter such as the concrete powder in the perforation, which has caused the variation in the fixing strength of the conventional chemical anchor, by a simple operation of liquid injection. Can do it. Therefore, simply adding a simple work process (liquid injection and replacement of the injected liquid) without drastically changing the process of the conventional chemical anchor bolt, and fixing based on work unevenness that was a difficult point of fixing the chemical anchor bolt Variations in strength can be eliminated. In particular, if water is used as the injection liquid and a water-curable resin is used in combination as the adhesive, the present invention can be easily implemented. In addition, in addition to water as the liquid to be injected, the liquid of the present invention can be used as long as it can precipitate the attached matter, so that the liquid to be injected can be used according to the anchor bolt fixing base material. Or, by selecting a combination of adhesives, it is possible to respond to various sites.

[Brief description of the drawings]

FIGS. 1A, 1B, 1C, and 1D are cross-sectional views showing each operation procedure of a method for fixing an anchor bolt according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Perforation 20 Liquid 30 Adhesive 40 Capsule 50 Adhered matter 60 Anchor bolt

Claims (3)

[Claims] 1. A method of fixing an anchor bolt in a perforation provided in a base material using an adhesive, wherein a liquid is injected into the perforation, and deposits on an inner wall of the perforation are settled by the injected liquid. After that, an adhesive is injected into the perforation to replace the liquid with the adhesive, an anchor bolt is inserted, and the anchor bolt is fixed in the perforation by curing the adhesive. Method. 2. The method according to claim 1, wherein the step of injecting the adhesive is performed by submerging the capsule in which the adhesive is sealed into a perforated hole after injecting the liquid, and then inserting an anchor bolt while breaking the capsule. The anchor bolt fixing method described in the above. 3. The method according to claim 1, wherein water is used as the injection liquid, and a water-curable resin is used as the adhesive.
Or the fixing method of the anchor bolt of 2.