JP3340977B2 - Method of injecting repair material into repair site of concrete structure and injection plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouring method and a pouring device for pouring a repair material into a repair site when repairing a void generated by splicing or cracking of a concrete structure.

[0002]

2. Description of the Related Art The present inventor has filed Japanese Patent Application No. Hei 10-18697.
No. 8 proposes a method of injecting a repair material into a gap caused by joining or cracking of a concrete structure to prevent water leakage from the gap and a tool for injecting the repair material.

[0003] Fig. 6 shows a repair method proposed by the above-mentioned application, in which A is for repairing a spliced portion of concrete, and B is for repairing a cracked portion. The joint A is repaired by drilling a hole from the inside of the wall 2 facing the seam 3 between the bottom surface 1 and the wall 2 of the concrete, and penetrating through the water blocking plate 4 provided at the seam 3 to open the gap formed by the seam 3. A pouring hole 5 is formed at the center of the concrete wall, and then a pouring tool 7 is formed in the pouring hole 5 so as to form a pressurized area 8 by a repair material between the pouring hole 5 and the bottom of the pouring hole 5. The repair material supplied from the gun 9 is injected at a high pressure to replace the gap with the repair material. In addition, the repair of the cracked portion of B is performed by piercing the injection hole 5 where the bottom of the hole faces the void created by the crack 6 and reaches the center position of the wall.
The repair method is the same as that for the joint.

As a repair material known before the invention of the above application was proposed, an epoxy resin having a viscosity of about 3,000 cps was used, but a conventional repair material having a viscosity in this range has a low viscosity. Since it belongs to the building, construction work such as injecting repair materials over a long period of time under low pressure was performed. The reason is that when a low-viscosity repair material is injected at a high pressure, the repair material leaks from the repaired portion and the purpose of the repair cannot be achieved, and this method has a problem that workability is not good.

The above invention proposed by the inventor of the present application is an injection method which succeeded in injecting a repair material reliably into a joint or a crack at a high pressure. By developing a plug, we improved the injection method that enables high-quality repair work to be performed using a high-viscosity repair material.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an injection plug for injecting a high-viscosity repair material at a high pressure.

[0007]

A first solution is to inject a repair material into a void generated by concrete splicing, which is directed obliquely from the wall surface of the concrete wall and caused by concrete splicing. Drill an injection hole that passes through the position where the center part of the seam and the center line of the wall thickness intersect and the bottom part reaches deeper than the intersection position, and the tip spout is inside the rebar on the surface of the concrete wall. And a repair material made of an epoxy resin having a viscosity of 10,000 to 1,000,000 cps is applied to the center of the void formed by concrete splicing at a rate of 200 to 350 kg / cm ² . Injection is performed by the injection pressure, and the repair material is injected into the gap by the injection pressure of the injected repair material.

A second solution is to inject a repair material into a void created by cracks in the concrete, by drilling an injection hole from the wall surface of the concrete wall toward the void created by the cracks. An injection plug was attached to the hole so that the tip spout reached an inner position than the reinforcing bar on the surface of the concrete wall.
A repair material made of epoxy resin of 10,000 to 1,000,000 cps is applied to the center of the void created by cracking of concrete.
Inject with an injection pressure of 00-350 kg / cm ² ,
The repair material is injected into the gap by the injection pressure of the injected repair material.

[0009] A third solution is an injection plug for injecting a repair material into a void created by jointing or cracking of concrete. The injection plug is formed in a hollow shaft and injects the repair material into a base end portion. A plug body having a connection port for connection, a tip base portion having a diameter larger than the main body portion at the tip portion, and a male screw formed on the outer periphery, and a tip formed by a deformable material and inserted into the outer periphery of the plug body. An expansion sleeve engaged with the tip base, a nut cylinder screw-connected to the external thread of the plug body, and a discharge pipe body provided with a check valve inside and screwed to the tip base, An inclined surface having a large diameter toward the distal end base portion is formed in a portion where the distal end base portion and the plug main body are adjacent to each other, and an extended washer having an inclined surface at a joint portion between the expansion sleeve and the nut cylinder is placed on the inclined surface. A part of the nut cylinder protruding from the concrete wall is inserted into the injection hole for repair made in the concrete wall, and the injection plug is inserted into the injection hole for repair in the concrete wall, and the repair material is supplied from the connection port. Then, the repair material is discharged into the injection hole. A fourth solution is the third solution.
The expansion sleeve is characterized in that the inner peripheral surface of the opening at both ends is formed on a slope having a large diameter toward the opening end.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a concrete example of a case where repair work of a concrete splicing part is performed. Reference numeral 10 denotes a concrete wall, which is a wall in which a seam 11 is formed between the lower wall body 10a and the upper wall body 10b. Reference numeral 12 denotes a vertical bar buried in the concrete wall 10, and 13 denotes a horizontal bar.

The concrete wall 10 is provided on the concrete wall 10 to repair a void formed in the seam 11.
The injection hole 15 extends obliquely from the wall surface of the seam 11 and passes through the intersection of the center portion of the seam 11 and the center line 14 of the wall thickness, and the bottom portion extends deeper than that position. The outlets are reinforced 12 and 13 on the concrete wall 10 surface.
The injection plug 20 is mounted so as to face a position reaching inside. The injection hole 15 shown in FIG. 1 is formed at an inclination angle of 45 degrees with respect to the wall surface of the concrete wall 10.

FIG. 2 shows a concrete example of repairing concrete cracks. The arrangement positions of the concrete wall 10 and the reinforcing bars 12, 13 are the same as those in FIG. 1, but FIG. 2 is a cross section of the concrete wall. Injection hole 15
Can be drilled to a depth from the concrete wall 10 toward the crack 16 so that the bottom reaches the inside of the reinforcing bars 12 and 13 on the surface of the concrete wall 10. Then, the injection plug 20 is mounted with the tip spout facing the inner side of the reinforcing bars 12 and 13.

1 and 2, a high-viscosity repair material is injected from the injection plug 20 into the injection hole 15 at a high pressure. The repair material is the reinforcing bars 12,1 on the surface of the concrete wall 10.
Since it is injected from a position inside from 3, it does not expand the gap more than necessary and has high viscosity but reaches the inside of the gap reliably. Since the repair material is injected in a circular shape with the injection hole 15 as the center, the interval at which the injection hole 15 is drilled is approximately the same as the thickness of the concrete wall 10.

FIGS. 3 and 4 show the injection plug. The injection plug 20 is composed of a plug body 21, an expansion sleeve 22, a nut cylinder 23, and a pipe 24 for pouring. The expansion sleeve 22 and the nut cylinder 23 are assembled on the outer peripheral surface of the plug body 21 to form a pipe for pouring. Numeral 24 is incorporated in the tip of the plug body 21.

The plug main body 21 is provided with a connection port 25 formed in the hollow shaft for connecting an injection gun for injecting a repair material into a base end, and a distal end base 2 having a diameter larger than that of the main body at the front end.
6 in which an external thread 27 is formed on the outer periphery of the main body. The distal end base 26 has a slope 28 having a small diameter on the main body side and a large diameter toward the distal end, and a female screw 29 is formed in an opening of the distal end base 26.

The expansion sleeve 22 is a cylindrical body formed of a deformable material, and the inner peripheral surface of the opening at both ends is formed with a slope 22a having a large diameter toward the opening end. The material of the expansion sleeve 22 is aluminum, copper, nylon, low-density polyethylene, urethane, or the like.

The nut cylinder 23 has a hexagonal cross section and a female screw 29 formed on the inner peripheral surface. The pouring tube 24 is formed to have a length capable of accommodating different thicknesses of the concrete wall to be constructed, and has a smaller diameter than the expansion sleeve 22. Further, a male screw 31 formed at the base end of the pouring tube 24 is screwed to the female screw 30 of the tip base 26. A check valve 32 is provided at the tip of the pipe 24 for pouring. Check valve 3
2 is a combination of ball and spring,
An open passage is formed when feeding from the inside of the tube, and a closed passage is formed for the pressure from the tip of the tube. Reference numeral 33 denotes an expansion washer, which is formed on a washer body with a slope 33a having a smaller diameter toward the tip.

In order to assemble the injection plug 20, the injection pipe 24 is inserted into the female screw 30 of the tip base 26 of the plug body 21.
Male screw 31 is screwed together, and then the connection port 25 serving as the base end of the plug body 21 is provided.
2. The extension washer 33 and the nut cylinder 23 are inserted in this order, and the male screw 27 of the plug body 21 and the female screw 29 of the nut cylinder 23 are inserted.
Screw connection. At this time, the inclined surface 28 of the distal end base 26 slightly enters the distal end of the expansion sleeve 22, and the inclined surface 33 a of the extended washer 33 slightly enters the proximal end.

In FIG. 1, the injection plug 20 is formed in the injection hole 15 formed in the concrete wall 10, the tip outlet of the pipe 24 is directed to the vicinity of the bottom of the hole beyond the seam 11, and the base end is formed. A part of the nut cylinder 23 is inserted by projecting from the wall surface. Next, when a rotating tool is mounted on the nut cylinder 23 and the nut cylinder 23 is rotated, the nut cylinder 23 moves toward the distal end of the plug main body 21 and the distal end base 26.
The expansion sleeve 22 is compressed between the inclined surface 28 and the expansion washer 33. For this reason, a compressive force is applied to the expansion sleeve 22 from both ends in the axial direction at this position, and the diameter of the expansion sleeve 22 is increased.
It is firmly fixed to the inner wall.

The injection plug 20 shown in FIG. 2 is used by removing the pouring tube 24. In this case, the check valve (32) is provided at the tip base 26 of the plug body 21. It is. The procedure for mounting the injection plug 20 in the injection hole 15 is the same as that in FIG.

An injection gun, which will be described later, is connected to the connection port 25 of the plug body 21, and a repair material supplied from the injection gun is injected at a high pressure. Since the repair material to be filled into the injection hole 15 is injected from inside the reinforcing bars 12 and 13 on the surface of the concrete wall 10, the flow of the repair material is good and smooth injection is performed. It is not visible that the repair material has reached the inner part of the gap from the injection hole 15, but it can be confirmed that the repair material has been filled by flowing out of the repair material from the seam 11 or the crack 16.

The repair material of the present invention has a viscosity of 10,000 to 1,000,000 c.
ps epoxy resin, injection pressure 200-35
0 kg / cm ² . By the way, the discharge amount is 200 g / m
in.

Next, an injection gun for supplying a repair material to the injection plug will be described with reference to FIG. The injection gun 40 has a cylinder housing 41 and a supply pipe 42 provided in the cylinder housing 41 for supplying a repair material to the injection plug. A piston 43 reciprocates in the cylinder housing 41 and the piston 43. And a repair material case 45 removably connected to the supply pipe 42 by inserting a piston rod 44 provided integrally with the supply pipe 42. The repair material case 45 is reciprocated by the piston rod 44. The repair material contained in the supply pipe 45 is discharged from a supply nozzle 46 formed at the distal end of the supply pipe 42.

The cylinder housing 41 has a handle 4
7 is provided to supply pressurized air from an air tube 48 connected to the distal end of the handle 47 into the cylinder housing 41. Reference numeral 49 denotes an operation lever provided adjacent to the handle 47 for performing an opening / closing operation when the compressed air from the air tube 48 is supplied to the cylinder housing 41.

The repair material case 45 has a repair material outlet 45a for discharging the repair material at an upper portion thereof. The repair material case 45 accommodates a pressure-feeding piston 50 in the case and feeds compressed air to the bottom of the case. Are connected.
When the repair material case 45 is connected to the supply pipe 42, the repair material pouring port 45a and the repair material receiving port 42a of the supply pipe 42 coincide with each other.

FIG. 5 shows a state in which the piston 43 advances forward, and the piston rod 44 discharges the repair material in the supply pipe 42 from the supply nozzle 46. When the operation lever 49 is grasped and the supply direction of the compressed air from the air tube 48 is switched, the piston rod 44 is retracted together with the piston 43 so that the supply pipe 42 is filled with the repair material in the repair material case 45. Has become. Operation lever 49
While holding, the repair material can be continuously injected from the injection gun 40.

The injection method and the injection plug according to the present invention can be applied to all concrete structures regardless of the type of construction or civil engineering, such as buildings and bridges.

[0028]

The injection method and the injection plug of the present invention are capable of injecting a high-viscosity repair material at a high pressure into a void caused by jointing of concrete or a void caused by cracking of concrete. There is an effect that quality repair work can be performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a work for repairing a joint portion of concrete is being performed using an injection plug of the present invention.

FIG. 2 is a cross-sectional view showing a state where repair work for a cracked portion of concrete is being performed using the injection plug of the present invention.

FIG. 3 shows an injection plug, wherein A is a side view and B is a cross-sectional view.

FIG. 4 is a component diagram of an injection plug.

FIG. 5 is a partial cross-sectional side view showing an injection gun for supplying a repair material to the injection plug.

FIG. 6 is a construction diagram in which the inventor of the present application performs repair work by a repair method proposed before the present application.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Concrete wall 10a Lower wall 10a Upper wall 11 Seam 12 Vertical streak 13 Horizontal streak 14 Center line (concrete wall) 15 Injection hole 16 Crack 20 Injection plug 21 Plug body 22 Expansion sleeve 22a Slope 23 Nut cylinder 24 Discharge pipe Body 25 Connection port 26 Tip base 27 Male screw 28 Slope 29 Female screw 30 Female screw 31 Male screw 32 Check valve 33 Expansion washer 33a Slope 40 Injection gun 41 Cylinder housing 42 Supply pipe 42a Repair material inlet 43 Piston 44 Piston rod 45 Repair material case 45a Repair material spout 46 Supply nozzle 47 Handle 48 Air tube 49 Operating lever 50 Pressure feed piston 51 Air tube

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04G 23/02 B05C 5/00 B05D 7/00

Claims (4)

(57) [Claims] 1. A method of injecting a repair material into a void portion generated by a concrete joint, comprising: connecting a center portion of a seam (11) formed by the concrete joint with an oblique direction from a wall surface of a concrete wall (10). An injection hole (15) that passes through the position where the center line (14) of the wall thickness intersects and whose bottom reaches deeper than the intersection position is drilled, and a tip spout is formed in the injection hole (15) by a concrete wall (10). The injection plug (20) is attached so as to reach a position inside the rebars (12, 13) on the surface of the injection plug (2, 13).
From 0), a repair material made of an epoxy resin having a viscosity of 10,000 to 1,000,000 cps is injected into the center of the void formed by the jointing of concrete with an injection pressure of 200 to 350 kg / cm ² , and the injection pressure of the injected repair material is applied. A method of injecting a repair material into a repaired portion of a concrete structure, characterized by injecting a repair material into the gap. 2. A method for injecting a repair material into a void portion caused by cracks in concrete, wherein an injection hole (15) is formed from a wall surface of a concrete wall (10) toward a void portion caused by cracks. In the pouring hole (15), a tip spout is provided at a reinforcing bar (12,
13) An injection plug (20) is attached so as to reach an inner position than that of the injection plug (20), and a repair material made of epoxy resin having a viscosity of 10,000 to 1,000,000 cps is removed from the injection plug (20) in a void portion generated by cracking of concrete. 20 in the center
A method of injecting a repair material into a repair site of a concrete structure, wherein the repair material is injected at an injection pressure of 0 to 350 kg / cm ² , and the repair material is injected into the gap by the injection pressure of the injected repair material. 3. A connection plug for connecting an injection gun formed in a hollow shaft and injecting a repair material into a base end portion of the injection plug for injecting a repair material into a void generated by joining or cracking of concrete. A plug body (21) provided with a mouth (25), a distal end base (26) larger in diameter than the main body part at the distal end, and a male screw formed on the outer periphery; and the plug body (21) formed of a deformable material An expansion sleeve (22) fitted on the outer periphery of the plug and having a tip engaged with the tip base (26), a nut cylinder (23) screwed to a male screw of the plug body (21), and a non-return inside Valve (3
2) is provided with an injection tube (24) screwed to the tip base (26), and the tip base (2) is provided at a portion where the tip base (26) and the plug body (21) are adjacent to each other.
6) forming a slope (28) having a large diameter, and extending the washer (33) having a slope (33a) at the joint between the expansion sleeve (22) and the nut cylinder (23). 33a) is attached to the expansion sleeve (22), and a part of the nut cylinder (23) is protruded from the concrete wall into a filling hole for repairing drilled in the concrete wall to fill the filling plug (20). ) Is inserted, the repair material is supplied from the connection port (25), and the repair material is discharged into the injection hole. An injection plug for injecting the repair material into a repair location of the concrete structure. 4. The concrete structure according to claim 3, wherein the expansion sleeve (22) is formed with a slope (22a) having a larger diameter toward the opening end at an inner peripheral surface of the opening at both ends. An injection plug for injecting repair material into the repair area.