JPH1082018A - Grout filler for pier reinforcement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injecting tool which has an adhesive force to withstand the pressure at the time of grout material injection, is easily attached to and detached from a steel plate, and is appropriately disposed after use. SOLUTION: An injecting tool A comprising a rectangular flange-shaped base 1 and a tubular body 2, and a surrounding frame 3 having a slit 4 on a rear surface of the base 1, and an enclosing frame 5 formed concentrically with a through hole 6. And an epoxy resin adhesive is piled up on the concave surface 1a between the peripheral frame 3 and the surrounding frame 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grout filler for pier reinforcement for filling a gap between a concrete pier and a steel plate for reinforcement with grout.

[0002]

2. Description of the Related Art In order to make a concrete pier supporting an elevated structure such as an expressway or a bullet train capable of withstanding a large earthquake, means for winding a steel plate having a thickness of 9 to 16 mm on a pier surface has been adopted. I have. The steel plate wound around the pier is fixed to multiple unit members vertically and horizontally using anchor bolts, but the butt portions in the horizontal direction of the members are joined by welding, and then 4 mm between the pier and the steel plate The gap is filled with grout and the pier and steel plate are integrated.

[0003] Epoxy resin is used for the grout material,
It is fed into the steel plate by the pump. The steel plate has injection holes at the top, bottom, left and right. An injection tool is fixed to the surface of the injection hole, and an end of a hose attached to a pump is connected to the injection tool. When grout is injected, 10 to 30 kg / cm is used.
^Since the pump pressure of ² is applied, the injection tool must have the strength to withstand this pressure and the adhesion to the steel plate. As an example of a conventional injection device, as shown in FIG. 6, an injection device made of an aluminum alloy in which a cylindrical body 101 is inserted into a rectangular flat substrate 100 is known.

[0004]

When the above-described conventional injection tool is fixed to the surface of the steel plate 102, simply applying the adhesive 103 to the rear surface of the base 100 cannot withstand the pressure during the injection of the grout material. , The adhesive 103 and the substrate 10
0 is buried and a part of the cylindrical body 101 is hidden, but if the adhesive 103 is not uniformly applied to the rear surface of the base or if the adhesion is insufficient, it may be applied to the steel plate 102. There is a risk that the grout material injected may leak from this portion or the joint portion between the base body 100 and the cylindrical body 101 due to a gap therebetween, and the work of applying the adhesive 103 is troublesome. , After injecting grout material
When the injection tool is removed from the adhesive, the base 100 is
3 does not go smoothly, and there is a danger of the adhesive being scattered.
2 is left in a recessed state in the injection hole, requiring cumbersome surface treatment such as putty work. Further, the adhesive adheres to the injection tool after being removed. There are various problems that simultaneous processing cannot be performed.

The present invention has been made in consideration of the conventional disadvantages described above, and makes it easy to apply an adhesive and fix an injection tool to a steel plate. Has sufficient adhesion to withstand the pressure of steel, no risk of resin leakage, easy removal after pouring, and easy removal of adhesives adhering to the steel plate surface, and disposal as industrial waste It is intended to provide an easy injector.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a grouting material injection tool facing an injection hole of a steel plate for reinforcing a concrete pier, comprising:
A peripheral frame having a slit, and a surrounding frame having a slit and a through-hole concentric with the through-hole of the cylindrical body are provided on the rear surface of the base, and the projecting portion is formed between the peripheral frame and the surrounding frame. The technical means is to pour an epoxy resin adhesive on the concave surface, fix the injection tool to the steel plate surface with the adhesive, and attach the end of the hose that feeds the grout material to the cylindrical body, In addition, the injection tool is integrally molded using polycarbonate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, A is a transparent injection tool integrally molded of polycarbonate resin, and comprises a rectangular flange-like base 1 and a cylindrical body 2 projecting from the center of the front surface of the base 1. A peripheral frame 3 and a through hole 6 of the cylindrical body 2 are provided on the rear surface of the base 1.
The surrounding frame 5 is formed in a concentric shape, and the two sides of the peripheral frame 3 are slightly inwardly formed, and the slits 4 are formed in the respective portions.
The length of one side of the peripheral frame 3 is 40 mm, the length of the slit 4 is 20 mm, the hole diameter of the through hole 6 is 7 mm, and the inner diameter of the surrounding frame 5 is about 20 mm. Note that the slits 4 may be provided on four sides of the peripheral frame 3, and in that case, it is convenient to form each side of the peripheral frame 3 in the same manner as the two sides shown in FIG.

The length of the cylindrical body 2 is less than 40 mm and the outer diameter is 10
mm, but the diameter of the rear part is 12 m to give strength.
The rib 7 is further provided at the rear part to reinforce and a wedge-shaped uneven stripe 8 is formed at the front end part.

FIG. 2 shows a state in which the injection tool A faces the injection hole 21 of the reinforcing steel sheet 20, and the adhesive 9 for fixing the injection tool A to the steel sheet 20 is a putty-like epoxy resin type. Is preferred. The adhesive 9 is applied to the peripheral frame 3 and the surrounding frame 5 of the base 1.
Are placed on the concave surface 1a between the
So that the adhesive 9 does not enter the inside. Then, the tip of the guide rod 10 inserted through the through hole 6 of the cylindrical body 2 is inserted into the injection hole 2.
The injection tool A is pressed into contact with the surface of the steel plate 20 while engaging with 1.
The adhesive 9 that has been embossed on the concave surface 1a overflows radially when it comes into contact with the steel plate 20, and also leaks out from the slits 4 formed on two sides of the peripheral frame 3 to the outside like arrows, thereby bonding the overflowing adhesives to each other. Thus, the injection tool A is a steel plate 2
It is firmly fixed to zero. As described above, it is preferable to form the peripheral frame 3 having the slits 4 on the rear surface of the base, slightly inward, since the adhesive 9 does not leak to the surface side. Then, when the injection tool A is fixed, the guide rod 10 is removed from the through hole 6.

As shown in FIG. 3, the reinforcing steel plate 20 is fixed to the surface of a concrete pier 30 with anchor bolts (not shown). The illustrated steel plate 20 has two
Although the sheets are superposed, the number of sheets differs depending on the length of the pier 30. Further, the steel plates 20 arranged side by side are integrated with each other at the butted portions by welding. There is a gap 31 of 4 mm between the concrete pier 30 and the steel plate 20, and a plurality of injection holes 21 are provided in the steel plate 20 to fill the gap with the grout material 40. The grout material 40 is made of an epoxy resin which is excellent in adhesiveness, has mechanical strength such as compression, tension and bending, and is advantageous in durability and weather resistance.

The adhesive 9 is sufficiently dried and the injecting tool A is made of the steel plate 2
At the stage where it is fixed to 0, the grout material 40 is injected into the gap 31 as shown in FIG. That is, when the end of the hose 42 of the grout pump 41 is connected to the tubular body 2 and the grout material 40 is sent out by the pump pressure, the grout material that has entered the through hole 6 of the tubular body 2 from the hose 42 is filled with the injection hole of the steel plate 20. The gap 31 enters the gap 31 and fills the gap. As described above, since the injection holes 21 are provided at a plurality of positions of the steel plate 20, first, grout material is injected from the injection holes below the steel plate, and when a predetermined amount of filling is performed, the grout material is sequentially moved upward.

As soon as the injection is completed, the through hole 6 of the injection tool A is inserted into the through hole 6 as shown in FIG.
By engaging the tapered plug 50 as described above, the through hole 6 is closed to prevent the grout material from leaking. When the grout filling operation is completed, the individual injection tools are removed from the steel plate 20, but most of the adhesive 9 is embedded in the concave surface 1a between the peripheral frame 3 and the surrounding frame 5 in the base 1. Since only a small amount of adhesive remains on the steel plate 20 when the injection tool A is removed, no special work is required for these removing operations.

[0013]

The present invention as described above has the following specific effects. (1) An epoxy resin-based adhesive is placed on a base of an injection tool, and the mounting is naturally completed by pressing against a steel plate. Prevents the need to apply the adhesive as before, improves work efficiency, and prevents the adhesive from entering by the surrounding frame on the rear surface of the base. Is made. (2) A part of the adhesive overflows from the slit formed in the peripheral frame of the base and is bonded to a part of the adhesive between the steel plate and the base, so that the adhesive strength is excellent and the pressure at the time of grout material injection is also excellent. Since it can withstand sufficiently, there is no trouble in the injection operation. (3) After installation, the injection tool is tightly joined to the steel plate surface,
Since there is no slight gap, there is no danger of resin leakage from the grout material. (4) The adhesive does not adhere to the surface of the base, and most of the adhesive is buried in the concave surface between the peripheral frame and the surrounding frame, so that a large amount of adhesive remains on the steel plate when the injector is removed from the steel plate. The surface of the steel sheet can be finished by a simple operation of rubbing with sandpaper, and the removal can be performed smoothly, so that there is no danger of the adhesive being scattered. (5) Since the entire injection tool is made of an integrally molded product of polycarbonate, it is suitable for low-cost mass production without requiring many molding steps, and has excellent load resistance and impact resistance unique to polycarbonate. Even if pump pressure is applied,
Maintains a regular shape without cracking, breakage, deformation, etc. (6) Since both the injection tool and the adhesive are made of synthetic resin, they can be simultaneously treated as industrial waste.

[Brief description of the drawings]

FIG. 1 shows the present injection tool, wherein (a) is a side view and (b) is a rear view.

FIG. 2 is a horizontal sectional view showing a state in which an injection tool is attached to a steel plate surface.

FIG. 3 shows a state in which a steel plate is wound around a concrete pier, (a) is a front view, and (b) is a partially enlarged horizontal sectional view thereof.

FIG. 4 is a schematic view showing a state where the present injection tool is fixed to a steel plate and a grout material is injected.

FIG. 5 is a plan view of the present injection tool in a state where the tubular body is sealed.

FIG. 6 is a partial plan view showing a usage state of a conventional injector.

[Explanation of symbols]

 A Injection tool 1 Base 1a Concave surface 2 Cylindrical body 3 Peripheral frame 4 Slit 5 Enclosure frame 6 Through hole 9 Adhesive 20 Steel plate 21 Injection hole 30 Concrete pier 40 Grout material 42 Hose

Claims (2)

[Claims] 1. A grouting material injection tool facing an injection hole of a steel plate for reinforcing a concrete pier, comprising a rectangular flange-shaped base, and a cylindrical body protruding from the center of the front surface of the base, A peripheral frame having a slit and a surrounding frame formed concentrically with the through-hole of the cylindrical body are protruded, and an epoxy resin-based adhesive is placed on the concave surface between the peripheral frame and the surrounding frame, and the injection tool is filled with the adhesive. A grout injection device for reinforcing a pier, wherein a hose end for feeding the grout is fixed to a surface and attached to a cylindrical body. 2. The grout material pouring device for reinforcing a pier according to claim 1, wherein the pouring device is formed integrally with polycarbonate.