KR101284618B1 - Dry way injection grouting method for concrete structure in water - Google Patents

Abstract

The present invention relates to a repair method for filling a cracked site by injecting an injection material such as epoxy resin into the cracked site of the underwater concrete structure, the air inlet 21 and the exhaust port 22 to the cracked site of the underwater concrete structure (10) And sealing the cracked portion by sequentially filling a sealing material 41 such as a silicone-based resin and a cement cement 42, and then pressurizing the compressed air through the air supply 21 to press the inside of the cracked portion. By excluding the residual water, it is possible to create a dry working environment during the injection and curing of the injection material.
Through the present invention, it is possible not only to induce the injection and diffusion of the injection material smoothly in the crack repair of the underwater concrete structure, but also to closely adhere between the injection material and the cracked concrete surface.

Description

DRY WAY INJECTION GROUTING METHOD FOR CONCRETE STRUCTURE IN WATER}

The present invention relates to a repair method for filling a cracked site by injecting an injection material such as epoxy resin into the cracked site of the underwater concrete structure, the air inlet 21 and the exhaust port 22 to the cracked site of the underwater concrete structure (10) And sealing the cracked portion by sequentially filling a sealing material 41 such as a silicone-based resin and a cement cement 42, and then pressurizing the compressed air through the air supply 21 to press the inside of the cracked portion. By excluding the residual water, it is possible to create a dry working environment during the injection and curing of the injection material.

As a typical method of repairing cracks in concrete structures, a method of injecting a high-strength rapid injection material such as an epoxy resin into a cracked site may be mentioned.

 This injection crack repair method is initiated by cutting a portion of the cracked portion at once by cutting the crack portion into a V or U shape as shown in FIG. 1.

Thereafter, the injection material injection hole is drilled in the concrete structure 10, and the injection hole is formed by diagonally drilling the periphery of the crack site so that the crack line and the injection hole intersect the structure 10, and the injection packer is formed in the punched injection hole. (Package Packer) 30 is inserted, and a sealing portion 41, such as a silicone resin, is filled and sealed in the cut portion.

The injection packer 30 inserted into the injection hole is a kind of check valve having a rubber-adhesive means formed at the front end, which seals the injection hole and suppresses the backflow or outflow of the injection material. As shown in FIG. 2, as the liquid injection material is pressurized while the injection nozzle 53 is coupled to the head of the injection packer 30, the injection material via the injection packer 30 flows into the injection hole and diffuses into the cracked portion. Is charged.

When the filled injection material is hardened, crack repair is completed by removing the exposed injection packer head 30, arranging the surface of the concrete structure 10, and forming a cement finishing layer 49.

The above-described injection crack repair method of the concrete structure may be applied by adjusting the exponential or quick-drying properties of the sealing material 41 and the injection material when applied to the underwater concrete structure 10, and the injection crack of the underwater concrete structure Patent No. 6,289,492 may be mentioned as a repair related technology.

Conventional submerged concrete structure crack repair method, including Patent No. 6,28949, as shown in Figure 1, cutting the crack site, sealing and drilling through the sealing material 41, injection material injection and curing through the injection packer (30) As a result of the process, the water penetrated into the cracked portion of the underwater concrete structure 10 is inhibited smooth diffusion of the injection material, as well as problems such as poor curing of the injection material, poor adhesion and strength as the injection material is mixed with water.

The present invention was devised in view of the above-described problems, and in the crack repair method for injecting and filling a liquid injection material into the cracked portion of the underwater concrete structure 10, the cracked surface surface layer of the structure 10 is cut off and the recess portion ( The cutting step (S11) to form the gap, the air supply forming step (S12) for installing the air supply port 21 and the exhaust port 22 in the upper and lower portions of the cracks, respectively, and the injection hole around the cracks The injection hole forming step (S13) for allowing the cracks in the structure 10 and the perforated injection hole to intersect and inserting and fixing the injection packer 30 in the injection hole, and the sealing material 41 in the indentation formed in the cracked portion Sealing step (S21) for partially filling, fastening step (S22) for curing by filling the inner diameter cement 42 to the crack site concave portion filled with the sealing material 41, and compressed air through the air supply 21 Crack by injecting into the exhaust port 22 When the air supply step (S31) for excluding the remaining water, and the injection nozzle 53 to the injection packer 30 to inject and fill the injection material in the cracked portion (S32), and the filled injection material is cured Dry crack repair method of the underwater concrete structure, characterized in that consisting of the cleaning step (S41) for cutting the head of the injection packer 30 exposed to the surface of the structure (10).

In addition, after the cleanup step (S41) characterized in that the finishing step (S42) for attaching the index plate 43 to the surface of the cracked portion of the structure 10 and installing the pressing plate 44 for pressing the index plate 43 is performed. Is a dry crack repair method for underwater concrete structures.

Through the present invention, it is possible not only to induce the injection and diffusion of the injection material smoothly in the crack repair of the underwater concrete structure, but also to closely adhere between the injection material and the cracked concrete surface.

As a result, it is possible to enhance the crack repair effect of the underwater concrete structure, to effectively suppress the progress of cracking, and to improve the structural stability and durability of the entire structure.

1 is a diagram illustrating a conventional injection-type concrete structure crack repair method
Figure 2 is a situation of repairing cracks underwater concrete structure applied to the present invention
3 is an explanatory diagram of a work situation step by step of the present invention;
Figure 4 is a representative cross-sectional view of the concrete structure to which the present invention is applied
5 is an explanatory view of the finishing step of the present invention

The detailed configuration and implementation process of the present invention will be described with reference to the accompanying drawings.

First, FIG. 2 illustrates a crack repair work situation of an underwater concrete structure to which the present invention is applied, and the present invention is a crack repair method for various underwater concrete structures such as a pier or a caisson, as shown in FIG. Overall work is carried out underwater by divers.

The present invention is to create a dry injection environment using compressed air in the injection material injection-type underwater concrete crack repair method, the injection pump 52 and the injection packer 30 as in the general injection concrete crack repair method It takes a device and materials such as, as well as a compressor (51) and associated piping equipment for supplying compressed air, as shown in Figure 2, such as the injection pump (52) and compressor (51) The equipment may be mounted on the barge 59, or may be built on top of the structure 10 exposed above the surface of the water, or in the case of adjacent land facilities.

This invention starts with a cutting step (S11) which once cuts the crack site surface layer of the structure 10 to form a recessed part, as shown in FIG.

That is, as shown in step 4, which is a representative cross-sectional view of the concrete structure 10 to which the present invention is applied, the surface layer portion in which the crack is formed is cut into a V-shape or a U-shape to form a recessed portion to seal the sealing material 41 to be described later. It is to be able to charge tightly.

When the cutting step (S11) is completed, as shown in Figure 3, the air supply forming step (S12) for installing the air supply port 21 and the exhaust port 22 in the upper and lower portions, respectively, where the air supply port 21 ) And the exhaust port 22 is a tubular body with both ends open, and is inserted after drilling the cracked portion as in the enlarged in the ellipse of the air flow forming step (S12) of FIG. 3. As in the enlarged part, the side through hole 29 may be formed at the distal end of the air supply port 21 and the air exhaust port 22 for smooth air flow between the air supply port 21 and the air exhaust port 22 and the crack portion.

In addition, the injection hole forming step (S13) for puncturing the injection hole around the crack and inserting and fixing the injection packer 30 in the injection hole is performed, as in the enlarged in the ellipse of the injection hole forming step (S13) of FIG. The inlet of the injection hole is formed around the crack site and the injection hole drilling direction is diagonally drilled so that the perforated injection hole and the internal crack of the structure 10 can cross each other.

When inserting the injection packer 30 into the perforated inlet, as shown in Figure 4, the injection packer 30 of the appropriate length is inserted so that the tip of the injection packer 30 formed with the outlet is not excessively inserted beyond the crack intersection point with the injection hole Preferably, the head of the injection packer 30 may be exposed to the surface of the structure 10 so that the injection nozzle 53 may be coupled later.

The injection packer 30 shown in Figures 3 and 4 is a kind of injection packer 30 generally applied to the injection-type concrete crack repair method including the present invention, enlarged excerpt of the drawing of the injection hole forming step (S13) of FIG. As in the above section, a rubber expansion ring 34 is installed at the end of the pipe, and both ends of the expansion ring 34 have washers 33 which are close and spaced apart by rotating the injection packer 30 main body. When the injection packer 30 is rotated in the state in which the injection packer 30 is inserted into the injection hole, the expansion ring 34 is expanded while the washers 33 at both ends of the expansion ring 34 are expanded to expand the injection ring inner peripheral surface and the expansion ring. (34) It has a structure in which the outer circumferential surface is in close contact.

In addition, the cross-sectional shape of the tubular body of the injection packer 30 is formed in a polygon to enable the coupling of the rotary tool, the cutting groove 35 is formed in the head of the injection packer 30 to form a structure (S41) to be described later (S41) 10) It is configured to easily cut the head of the injection packer 30 exposed on the surface.

When the air passage forming step (S12) and the injection hole forming step (S13) is completed, as shown in Figure 3, the sealing step (S21) for partially filling the sealing material 41 in the indentation formed in the cut portion and the sealing material 41 The fixing step (S22) of filling the fast-cemented cement 42 with the partially filled crack site indentation is sequentially performed.

The sealing material 41 partially filled in the recessed part in the sealing step S21 is applied with a silicone resin to insulate the cracked part and the recessed part from the outside of the structure 10 to secure an airtight state, and a fixing step The fast cement (42) filled in (S22) is to form a support layer to prevent the separation of the sealing material 41 and to maintain the airtight state firmly, the air-feed step (S31) to be described later through the fast cement 42 support layer And compressed air and the injection material at high pressure in the injection step (S32) can overcome the pressure and prevent the sealant 41 from bursting or leaving.

When curing of the inner diameter cement 42 is completed, the compressed air is injected through the air supply port 21 and discharged to the exhaust port 22 to perform the air supply step S31 for excluding water remaining in the cracked portion.

The air supply port 21 is connected to the compressed air supply means such as a barge 59 or a compressor 51 installed on the land as the air supply hose 25, as shown in FIG. The injected compressed air is diffused along the crack and then discharged through the exhaust port 22.

Therefore, in the initial stage of the air supply step S31, the water remaining in the cracked portion is discharged through the exhaust port 22, and once the water at the cracked portion is completely excluded, the air is discharged through the exhaust port 22, as shown in FIG. Although bubbles are formed in the water, a separate hose connecting the exhaust port 22 and the barge 59 or the land may be installed to effectively grasp the drainage or the exhaust process of the residual water in the crack, although not shown.

As shown in FIG. 3, the air supply port 21 is preferably installed above the cracked site. When the air inlet 21 is installed below the cracked site, the compressed air injected is floated even when the residual water of the cracked site is not completely discharged. This may be because it may be difficult to determine whether the residual water at the cracking site is excluded.

When the residual water of the cracked portion in the structure 10 is excluded through the air-sending step (S31), the dry working environment can be created through the present invention, thereby ensuring the injection crack repair condition comparable to the land concrete structure. .

When the air supply step S31 is completed, as shown in FIG. 3, the injection nozzle 53 is connected to the injection packer 30 to inject and fill the injection material at the cracked portion, and an injection nozzle 53 is performed. It is connected to the injection pump 52 through the silver injection hose 26, the liquid injection material such as epoxy resin, which is pressurized by the high pressure in the injection pump 52, the injection hose 26, the injection nozzle 53 and the injection packer 30 It enters into the crack site in the structure 10 via).

Filling the injection material in the state in which residual water is excluded in the cracked portion in the structure 10 through the air supply step (S31), not only can induce the injection and diffusion in the cracked portion of the injection material, but also tight filling and cracking of the injection material Close attachment between the concrete surfaces of the site is possible.

When the injection step (S32) is completed and the filling injection material is cured, the present invention is completed by performing a cleanup step (S41) for cutting the head of the injection packer 30 exposed on the surface of the structure 10, the above-mentioned As described above, since the cutting groove 35 is formed in the head of the injection packer 30, the head of the injection packer 30 is hit by hitting the injection packer 30 exposed to the outside of the structure 10 as shown in FIG. 4. Easy to cut

In addition, after the cleanup step (S41) is performed by forming a finish layer 49 with a finish that can be cured under water, adhesives or cement on the surface of the structure 10, the crack is repaired, to maintain the crack repair state firmly Of course, you can also secure aesthetics.

On the other hand, since the concrete structure 10 to which the present invention is applied is located in the water, the formation of such a finishing layer 49 may be difficult and may cause excessive construction cost increase.

Thus, in the present invention, as shown in Figure 5, after the cleaning step (S41) after the finishing step of attaching the index plate 43 to the surface of the crack site of the structure 10 to install the pressing plate 44 for pressing the index plate 43 By performing (S42), it was possible to maintain the state of crack repair firmly without complicated pouring, plastering and curing process.

As the index plate 43 applied during the finishing step (S42), a silicone-based resin such as the aforementioned sealing material 41 may be applied, or another rubber or synthetic resin index material may be applied.

10: structure
21: air supply
22: exhaust port
25: Air supply hose
26: injection hose
29: side opening
30: injection packer
33: Washer
34: expansion ring
35: cutting groove
41: sealing material
42: fast diameter cement
43: index plate
44: pressing plate
49: finishing layer
51: compressor
52: injection pump
53: injection nozzle
59: barge
S11: Incision Step
S12: forming air flow stage
S13: injection hole forming step
S21: sealing step
S22: fixing step
S31: sending step
S32: injection step
S41: cleaning up step
S42: finishing stage

Claims (2)

As a crack repair method for injecting and filling a liquid injection material into the cracked portion of the underwater concrete structure 10, a cutting step (S11) of cutting the cracked surface surface layer of the structure 10 to form a recessed portion is preceded. In the crack repair method in which an injection hole intersecting the crack is drilled around the crack area,
An air supply forming step (S12) for installing the air supply port 21 and the exhaust port 22 in the upper and lower portions of the cracked portion, respectively;
An injection hole forming step (S13) for puncturing the injection hole around the crack site to allow the crack in the structure 10 to cross the perforated injection hole and inserting and fixing the injection packer 30 in the injection hole;
Sealing step (S21) for partially filling the sealing material 41 in the recessed portion formed in the cracked portion;
A fixing step (S22) of filling and curing the fast-cemented cement 42 in the crack portion recessed part in which the sealing material 41 is partially filled;
An air supply step (S31) for excluding compressed water remaining in the cracked portion by injecting compressed air through the air supply port 21 and discharging it to the exhaust port 22;
An injection step (S32) of connecting the injection nozzle 53 to the injection packer 30 to inject and fill the injection material at the crack portion;
Dry crack repair method of the underwater concrete structure, characterized in that when the filling the injection material is cured consists of a cleaning step (S41) to cut the head of the injection packer 30 exposed on the surface of the structure (10).
The finishing step S42 of claim 1, wherein after the cleanup step S41, the finish plate 43 is attached to the surface of the cracked portion of the structure 10, and the press plate 44 for compressing the index plate 43 is installed. Dry crack repair method for underwater concrete structures.

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