JPH10115103A - Method of reinforcing construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the waste of putty, and to obviate the leakage of adhesives by a method wherein the head of a fixing member is arranged into the wall thickness of a panel, a plate body, on which putty is placed, is pushed against the heat of the fixing member while directing putty towards the inside, a clearance between the fixing member and the panel is sealed, and the plate body is removed after the infection and curing of adhesives. SOLUTION: A steel plate 5 is arranged on the outside of a pier 1, and the front end of a screw 3 is retained into a hole 2 and the steel plate 5 is supported. When putty 15 is placed on a plate 11, which is made of a polyethylene resin and formed in a discoidal shape and in which a large number of through-holes 13 are bored to a periphery, and pushed against the head of the screw 3, putty 15 enters a clearance formed by the head of the screw 3 and a hole 6 by pushing force, and residual putty 15 is transferred to the peripheral section side. Putty 15 is formed in a filmy shape and protruded to the outside as spherical lumps 16 from the through-holes 13 at a stage when the plate 11 is abutted against the steel plate 5. The inside of the clearance 4 is filled with adhesives, and the plate body 11 is removed after the curing of adhesives. Since a clearance between the steel plate 5 and the screw 3 is sealed with a small quantity of putty 15 in a filmy shape, the waste of putty 15 is prevented, and the leakage of infected adhesives can also be obviated. The removal works of the residual section of putty 15 are also facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fixing a reinforcing panel to the outside of a concrete structure by using fixing members such as bolts, screws, pins, etc., and sealing the periphery of the panel between the structure and the panel. The present invention relates to a reinforcing method for injecting an adhesive from a drilled hole to bond and integrate a panel to a structure, and is used when reinforcing a floor slab, a column, a wall, and the like.

[0002]

2. Description of the Related Art This kind of reinforcement method includes:
The thing described in Japanese Patent Publication No. 1-11763 is known. This reinforcing method is a reinforcing method in which a steel plate as a reinforcing panel is bonded and fixed to the lower surface of the concrete floor slab.After fixing the steel plate to the floor slab with bolts, an adhesive is injected and filled between the steel plate and the floor slab. The steel plate is fixed integrally to the concrete slab. In this known technique, since the head of the bolt for fixing the steel plate protrudes, the head of the bolt is covered with a cap filled with putty, and the gap between the bolt and the steel plate is sealed to prevent leakage of the adhesive. I have to. Since it is extremely difficult to remove the putty outside the head of the bolt after the injected adhesive has hardened, painting and other finishing are performed with the cap left as it is, and the appearance is extremely poor Therefore, even if the putty can be removed neatly, there is a disadvantage that the appearance is not clean because the head of the bolt remains protruding.

Recently, in order to position the heads of fixing members, such as bolts, screws, and pins, for fixing the reinforcing panel in consideration of the appearance after reinforcement, recesses are formed in the panel in advance. Or, furthermore, the outside opening of the through-hole formed in the panel for the fixing member is formed of a tapered wall, and the plate head of the fixing member is brought into close contact with the tapered wall using the fixing member of the plate head. I am aiming for the sealing effect. However, since the processing accuracy of the holes drilled in the panel and the positional accuracy of the holes for the anchors drilled on the concrete structure side and the holes of the panel are incomplete, sufficient sealing is performed in any case. At present, a large amount of putty is adhered to the outside. For this reason, a large amount of putty must be removed after the panels are bonded, and there is a disadvantage that a large amount of labor is required for the work.

[0004]

The present invention relates to a panel for fixing a reinforcing panel to the outside of a concrete structure by using fixing members such as bolts, screws, pins, etc., and applying a seal around the panel with the structure. In a reinforcing method of injecting an adhesive from a hole drilled into the panel and bonding and integrating the panel to the structure, it is required that a gap between the panel and the fixing member can be sealed in a film form using a small amount of putty. It was an issue.

[0005]

Technical means for solving this technical problem are as follows: (a) the head of the fixing member is positioned within the thickness of the panel, and (b) the plate on which the putty is placed is placed with the putty inside. (C) contacting the plate with the panel to seal the gap between the fixed member and the panel, and (d) removing the plate after the injected adhesive is cured. .

Since the head of the fixing member is located within the thickness of the panel, no protrusion is present on the outer surface of the panel when the panel is fixed to the concrete structure. Put the putty on the plate, press the fixing member against the head with the putty inside, the putty is pressed with sufficient force into the gap formed by the fixing member and the panel, and enters the gap as it is It will be sealed. When the plate is further pressed to bring the plate into contact with the panel, the putty between the plate and the surface of the panel becomes a film, and the excess putty protrudes from the plate, so that the excess putty is easily removed and collected. be able to. Therefore, the gap between the panel and the fixing member can be sealed in a film shape using a small amount of putty. When the injected adhesive is cured and the plate is removed using a tool, etc., the putty is in a film form between the plate and the panel, so that the plate can be easily removed, Putty does not remain on the panel in a lump.

[0007] As the panel, a steel plate generally used as a reinforcing material and a concrete plate containing a reinforcing material such as a reinforcing bar or a fiber can be suitably used. Further, bolts, screws, pins and the like are used as fixing members for the panel, and the front end is fixed to the concrete structure to fix the panel. As the putty, a general putty can be used as it is, but it is desirable to mix an adhesive resin such as an epoxy resin so as to withstand the injection pressure of the adhesive to enhance the bonding effect. It is more preferable that the putty has such a property that when it is dried, the adhesive effect is weakened so that the putty is easily peeled off. The plate may be of any material,
The use of a material such as polyethylene or polypropylene having a weak adhesiveness to the putty makes it extremely easy to remove the plate. In this case, if a part of the plate is bent outward,
Since the tip of the rag or the like can easily be made to face between the panel and the plate, workability can be improved.

When the head of the fixing member is positioned within the thickness of the panel, it is desirable to fix the panel with the outer surface of the head of the fixing member positioned inside the outer wall surface of the panel. This is because when the putty is pressed, a sufficient force is applied to the opening of the through-hole and a sufficient thickness can be formed on the putty, so that the sealing effect on the gap between the fixing member and the panel can be enhanced. ).

[0009] The second invention relates to a plate used in the above-mentioned reinforcing method, the technical means of which is to provide a through hole in the plate to allow the putty to protrude when pressed against the panel;
(Claim 3). When the plate on which the putty is placed is pressed against the panel, the putty is simultaneously squeezed and tries to protrude, but since the plate has a through hole, the putty tries to escape from the through hole to the outside of the plate. I do. Since the protruded putty releases the internal pressure outside the through-hole, the putty protrudes radially and forms a lump to cover the opening of the through-hole. Therefore, the plate body is supported from the outside by the protruded putty, and the plate body can be firmly attracted to the panel side during the injection of the adhesive. Therefore, the gap between the panel and the fixing member can be sealed in a film shape using a small amount of putty, and the plate itself can be securely adhered to the panel. This through hole is desirably provided especially when a plate made of a material having low adhesion to the putty is used. Further, in order to enhance the holding function of the plate by the through holes, it is desirable that a plurality of the plates are formed so as to be shifted from a position where the plate should face the fixing member.

[0010]

As a result, the gap between the panel and the fixing member can be sealed in the form of a film by using a small amount of putty, so that the putty is not wasted, the adhesive injected is prevented from leaking, and the work site is prevented from being stained. There are advantages that can be done. In addition, since the putty remaining on the surface of the panel is small, the putty can be removed by using a trowel or sanding with a simple sander.

[0011]

FIG. 1 shows a cross section when a steel plate 5 as a reinforcing panel is fixed to the outer peripheral wall of a pier 1 as a concrete structure and reinforced. A hole 2 is drilled in the pier 1 using a drill, and a hole 6 for inserting a countersunk screw 3 as a fixing member is drilled in the steel plate 5.
Are arranged outside the pier 1 with an appropriate gap 4 and the screws 3
Are held in the holes 2 to support the steel plate 1.
The outer opening edge of the insertion hole 6 is formed by a tapered wall 7 so that the head of the screw 3 can be taperedly fitted. The outer surface of the head of the screw 3 is about 1 m from the outer surface of the steel plate 1.
m inward. After supporting the steel plate 1,
Put the putty 15 on the plate 11 made of polyethylene resin,
When pressed against the head of the screw 3 as it is, the putty 15 enters into the gap formed by the head of the screw 3 and the hole 6 by the pressing force of the operator, and the remaining putty 15 is moved to the peripheral side of the plate 11. become. This plate 11 is of a disk shape,
The knob 12 is projected in the center thereof, and a large number of through holes 13 and 13 (only two are visible in the drawing) are formed in the periphery. When the plate 11 comes into contact with the steel plate 5, the putty is sandwiched in the form of a film, and the putty that is going to protrude moves outward from the through-hole 13 to the dango-shaped mass 16, 1, and 1.
6 is formed. In this state, an adhesive is injected and filled into the gap 4 from an adhesive injection port (not shown), and after the adhesive is cured, a bent portion (not shown) provided around the periphery of the plate 11 and the steel plate 5 The plate 11 is removed by smashing.

In the above embodiment, the screw 3 is physically locked in the hole 2 of the structure. However, a screw, a bolt, or the like may be fixed using a chemical anchor. When injecting an adhesive into the gap 4 formed between the pier 1 and the steel plate 5, a seal is provided around the steel plate 5, and an injection pipe suitable for the adhesive injector is attached to the steel plate 5 as necessary. This is the same as the conventional one shown at the beginning.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a reinforced portion of a pier.

[Explanation of symbols]

1 bridge pier, 2 screw support hole, 3 screw, 4 gap between steel plate and bridge pier, 5 steel plate, 6 steel plate screw insertion hole, 11 plate body, 13 putty through hole for protrusion, 15 putty

Claims (3)

[Claims] 1. A reinforcing panel is fixed to the outside of a concrete structure using fixing members such as bolts, screws, and pins,
In a reinforcing method for bonding a panel to a structure by injecting an adhesive from a hole formed in the panel after sealing around the panel with the structure, the head of the fixing member is made thicker than the panel. The plate body with the putty is pressed against the head of the fixing member with the putty inside and the plate body and the panel are brought into contact with each other to seal the gap between the fixing member and the panel and cure the injected adhesive Reinforcement method to remove the plate later. 2. The reinforcing method according to claim 1, wherein the panel is fixed by positioning the outer surface of the head of the fixing member inside the outer wall surface of the panel. 3. A plate used in the reinforcing method according to claim 1 or 2, wherein a through hole is provided to allow the putty to protrude when pressed against the panel.