KR0178043B1 - Injection plug device and injection method of concrete repair agent - Google Patents

Abstract

The present invention relates to an injection plug device for injecting a concrete repair agent into a concrete wall surface through an arc-shaped injection groove formed therein. The injection plug device includes a base member sealingly positioned at the open end of the arc-shaped injection groove, a plurality of guide posts extending from the base member, a plurality of same rod members extending through the guide post, and elastic deformation. It consists of a coupling member selectively coupled with the side wall of the arc-shaped injection groove. The coupling member is installed on the inner end of the guide post or the outer surface of the inner end of the guide coast, the coupling member has a width smaller than the width of the arc-shaped injection groove before deformation, the width of the arc-shaped injection groove after deformation It has a larger width and is coupled to the sidewall of the injection groove. The injection plug device is used to inject a concrete repair agent into the concrete inner wall, and this injection method forms an arc-shaped injection groove, and the base member is disposed at the opening end of the injection groove with the injection plug device positioned on the concrete wall surface. And coupling the coupling member with an arc-shaped injection groove to fix the plug device to the concrete wall surface.

Description

Injection plug device and injection method of concrete repair agent

1 is a plan view of a plug device for repairing concrete according to a first embodiment of the present invention.

2 is a cross-sectional view taken along the line II-II of FIG.

3A is a side view of the toothed washer which is one of the components of the plug device of the first embodiment.

3b is a plan view of the toothpaste washer.

4 is a cross-sectional view of a plug device and a concrete wall surface using the plug device according to the first embodiment.

5 is a cross-sectional view of the plug device according to the first embodiment before being fixed to the concrete wall surface.

6 is a sectional view of the plug device according to the first embodiment after being fixed to the concrete wall surface.

7 is a cross-sectional view of the plug device according to the second embodiment before being fixed to the concrete wall surface.

8 is a cross-sectional view of the plug device according to the second embodiment after being fixed to the concrete wall surface.

9A is a plan view of a toothed grip post which is one of the basic components of the plug device according to the second embodiment.

9B and 9C are cross-sectional and bottom views of the toothed grip post, respectively.

10A is a plan view of a trapezoidal slide piece which is another one of the basic components of the plug device according to the second embodiment.

10B and 10C are sectional views and a bottom view of the trapezoidal slide piece.

11 is a plan view of the injection plug device of the concrete repair agent according to the third embodiment of the present invention.

12 is a cross-sectional view taken along the line XII-XII of FIG.

FIG. 13A is a schematic side view of a distal end of a rod member and a toothed washer assembled to the rod member in the third embodiment of the present invention; FIG.

FIG. 13B is a front view of the toothpaste washer shown in FIG. 13A. FIG.

13C is a front view of another example of the toothed washer used in the third embodiment.

Fig. 14A is a schematic side view of a rod member leading end of a modification of the third embodiment of the present invention and a toothed washer of a modification assembled to the rod member.

14B is a front view of the toothed washer of the modification after being assembled to the rod member of the modification.

14C is a front view of the toothed washer of the modification before being assembled to the rod member of the modification.

15 is a sectional view of a plug device according to a third embodiment and a concrete wall surface using the plug device.

16 is a partial cross-sectional view of the plug device according to the third embodiment after being fixed to the concrete wall surface.

17 is a sectional view of an injection portion of a plug device according to a third embodiment;

18 is a perspective view of a double blade-type concrete cutter for forming an arc-shaped injection groove in the concrete wall surface.

The present invention relates to an injection plug device and an injection method of a concrete repair agent used to repair a concrete wall surface.

The deterioration of the concrete material on the concrete wall has been demanded. The deterioration is caused by the change over time of the concrete material itself, neutralization of the concrete by the external environment, damage by salt, alkali aggregate reaction, poor construction, and drying. This is caused by a decrease in strength due to shrinkage caused by cracking, cracking caused by vibration or earthquake caused by a vehicle, or peeling, or corrosion of reinforcing steel accompanying peeling. Deterioration of concrete may cause peeling of the coated mortar formed on the concrete body, which may cause peeling of the outer wall tiles of the building formed on the coated mortar, peeling and falling of the concrete inner wall of the railway tunnel, or leakage of the dam.

The release layer is formed between the inner concrete body and the outer mortar layer at a position of 2-3 cm from the wall surface, and the width of the typical release layer is in the range of 0.2-1 mm. In repairing the wall surface on which the release layer is formed, an epoxy resin or cement slurry injection method has been widely used for the purpose of filling the internal space.

According to the conventional epoxy resin injection method, an injection hole is formed to a peeling layer with a diameter of approximately 5 mm by a drill on the wall surface. Subsequently, the sleeve tip of the grease pump is pressurized into the injection port to directly pressurize the high pressure epoxy resin therein. Alternatively, the injection plug formed of a plastic material is fixed to the injection hole of the wall, and the pressurized epoxy resin is injected by a compressor or a manual pump. In both cases, any peeling other than the injection port observed on the wall surface is sealed by the sealant.

However, since the cement slurry has a relatively low viscosity, the high pressure grease pump cannot be used to inject the cement slurry. For example, if a grease pump capable of applying a high hydraulic pressure of about 30 kg / cm 2 is used, the cement slurry may leak through a minute gap formed between the inlet and the sleeve end of the grease pump, and thus pressurization is impossible. Done. For this reason, the low pressure injection method in which the pressure of 5 kg / cm <2> or less is applied to the injection of cement slurry is used. This low pressure injection method is also effective for epoxy resins.

In the case of a low pressure injection method for injecting cement slurry or epoxy resin, an injection hole is formed on the concrete wall surface by a drill, and the flange portion of the plastic plug is fixed to a position around the injection hole. Moreover, the injection hose extending from the injection pump fits into the inlet of the rear end of the plastic plug so that cement slurry or epoxy resin is pressurized and injected into the necessary internal crack portion of the concrete wall through the injection port.

This plastic plug is a funnel-shaped instrument having a diameter of approximately 5 cm and can be easily purchased as a commercial item. Adhesive is used to secure the plug to the wall. However, since the attachment strength is insufficient to allow the plug to be detached at the time of pressurized injection, an auxiliary operator or an operator for pressurizing the plug against the wall is required in addition to the operator operating the pressure pump.

Other types of injection plugs (hole-in-anchor-type injection plugs) are also commercially available to eliminate the need for an operator to press the plug against the wall. The plug has an anchoring or wedge function. Therefore, the anchor injection plug is firmly fixed in the opening of the opening of the wall by using a hammer. Therefore, the detachment of the injection plug from the wall surface can be avoided even during the pressure injection process.

According to the low pressure injection method using the conventional injection plug, it becomes difficult to inject the cement slurry as compared with the injection of the epoxy resin. Therefore, in order to inject the cement slurry, an injection hole is formed several times in the peeling part of the mortar, and it is necessary to take a lot of effort and time because it is examined by trial and error. In the worst case, epoxy resins can be used instead of cement slurry for concrete repair when inlets cannot be formed or investigated.

The inventors confirmed the factors that inhibit the cement slurry from smoothly being injected by the following experiment. First, a 30 cm X 30 cm sized and 3 cm thick mortar plate that simulated a mortar layer, and a 30 cm X 30 cm size that simulates the concrete inner wall and a transparent acrylic plate having a thickness of 1 cm were prepared. These two plates faced each other while forming a space of 0.3 mm (this space simulated a peeling space layer) by spacers, and the four sides of these plates were mutually clamped. Subsequently, a small 6 mm diameter hole, which simulated the injection port, was formed in the center of the mortar plate by a drill. In this case, just before the tip of the drill reaches the acrylic plate, the mortar plate is opened by the pressing force of the drill, and a conical mortar chip having a diameter of about 5 mm and a thickness of 3 mm in the central portion is in close contact with the acrylic plate, The phenomenon in which the drilled mortar chip was interposed in the space | interval of the regular space | interval formed between acrylic and mortar board was observed.

Cement slurry attempted to inject into the gaps at regular intervals through the minute holes using a manual pump, but it was impossible to inject slurry into the gaps. When the two plates were not clamped to each other, a small amount of water leaked into the mortar chip from the rear surface of the mortar chip (the surface opposite the acrylic plate side), and the surface was covered with cement particles.

This phenomenon is considered to be caused by the following reason. That is, when forming a hole, the drilled thin mortar chip | tip is formed, and the tip (chip surface which faces an acryl plate) closely adheres to an acryl plate. On the other hand, a very small gap is formed between the mortar plate and the other end of the mortar chip, which means that the internal gap space is not sufficiently in communication with the drilling hole. Since the injection was done from the mortar plate side, the cement slurry is filtered at the extremely small gap provided at the other end of the mortar chip, so that a small amount of water penetrates into the drilled mortar chip, and the trapped cement particles are transferred to the other surface of the chip piece. Accumulate and prevent or fill very small gaps. Thus, the cement slurry can no longer be injected into the predetermined gap between the mortar plate and the acrylic plate. In this regard, the drilled mortar chip is removed, the two plates are assembled together again, and the cement slurry is smoothly injected into the gap through the small hole because the small hole communicates smoothly with the internal gap space.

In actual construction, the cement slurry can be injected through one of the plurality of inlets, which do not sufficiently close the drilled mortar chip pieces, as the drilled holes are temporarily in communication with the large separation layer. Not due to the fact. Moreover, since the resin does not contain the particulate material, the injection of the epoxy resin is feasible. That is, since there is no particulate material for the cement slurry, the resin is not subjected to filtration on the other side of the drilled cylindrical mortar chip.

In order to avoid the generation of mortar chip pieces, various hole forming apparatuses such as a well core boring machine have been used. However, it was impossible to prevent the generation of mortar chip pieces.

Therefore, an object of the present invention is to eliminate the problems associated with the generation of mortar chip pieces that can block the peeling space by eliminating the above-mentioned drawbacks and problems while blocking the communication between the peeling space layer and the drilled inlet. It is to provide an improved method of injecting a concrete repair agent into the wall.

It is another object of the present invention to provide a method for injecting a concrete repair agent into a concrete wall surface in which efforts for concrete repair can be reduced, and conservative maintenance on the concrete wall surface can be achieved with high reliability with minimal effort and time. To provide.

It is a further object of the present invention to provide an injection plug device for an improved concrete repair agent on a concrete wall surface which can be used particularly in the injection method of the present invention.

Still another object of the present invention is to provide an injection plug device for a lower cost concrete repair agent that can be used in the injection method of the present invention.

Still another object of the present invention is to provide an injection plug device for a concrete repair agent that can be fixed to a concrete wall.

In order to achieve the above and other objects of the present invention, in the injection plug device of the repair agent to the inside of the concrete wall surface having an injection groove having a first width, a base mounted over the injection groove on the outer surface of the concrete wall surface A member, an injection guide means disposed at the center of the base member to allow a repair agent to be injected into the injection groove, extending from the base member to a position near the injection guide means, a through hole is formed, and an inner end portion At least two guide posts, each of which extends through the through hole and is movable outward from the inside of the injection groove and the concrete wall surface, respectively, and has the same plurality of rod members each having an inner side and an outer end; A second portion disposed at an inner end of one of the rod member and the guide post and smaller than the first width before deformation; It becomes a width, and after deformation provides an injection plug device for a concrete repair agent comprising an elastic coupling member having a third width larger than the first width for coupling with the wall of the injection groove.

In another aspect of the present invention, an injection plug for forming an arc-shaped injection groove having a first width and depth on the outer surface of the concrete wall surface, and injecting a repair agent into the concrete wall surface through the injection groove on the outer surface of the concrete wall surface Arranging a device, sealingly covering the arc-shaped injection groove, fixing the injection plug device to the arc-shaped injection groove, and pressurizing a repair agent into the injection groove through the injection plug device. It provides a method of pouring concrete repair agent into the concrete inner wall.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

The injection plug device of the concrete repair agent according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6. As shown in FIG. 2, the plug device includes a rectangular base (1), a cylindrical hollow guide post (2, 3), a 0-ring (4, 5), an injection nipple fixing segment (6), and a packing. (7), rod members (8, 9), toothed washers (10, 11), wing nuts (12, 13) and repair agent injection nipples (14).

The rectangular base 1 consists of four sides bent down so that each side has a bottomless box-like configuration. Throughout the description of the present invention one side of the base 1 is referred to as the outside and the other side of the base 1 (the side from which the bent portions extend) is referred to as the inside. The packing 7 is made of rubber and is located in the vicinity of the inner side and the side of the base 1. The injection nipple fixing segment 6 is implanted at the center of the rectangular base 1 by welding, and the repair agent injection nipple 14 may be screwed with the fixing segment 6 to inject the cement slurry. For example, the injection nipple 14 may be connected to an injection nozzle (not shown) of an injection pump (not shown) for injecting a concrete repair agent such as cement slurry.

On the base 1, two cylindrical hollow guide posts 2, 3 are implanted by welding. The guide post is made of metal and is arranged in a direction parallel to the long side of the rectangular base 1 and is located symmetrically with respect to the nipple fixing segment 6. The guide posts 2, 3 are formed inward from the base 1. In addition, female threads 2a and 3a are formed on the inner circumferential surfaces of the cylindrical hollow guide posts 2 and 3, respectively, and 0-rings 4 and 5 are formed inside the inner circumferential surfaces of the guide posts 2 and 3, respectively. Annular grooves 2b and 3b are formed for fixing.

The rod members 8, 9 extend through the hollow surfaces of the columnar guide posts 2, 3, respectively. Thus, the circumferential annular gap formed between the rod members 8 and 9 and the guide posts 2 and 3 is sealed so that the fluid does not leak by the 0-rings 4 and 5. In addition, the inner ends of the rod members 8 and 9 protrude from the inner ends of the guide posts 2 and 3, and the toothed washers 10 and 11 protrude from the inner ends of the rod members 8 and 9, respectively. Screwed to the end. The toothed washers 10 and 11 are formed of an elastic material such as elastic steel. As clearly shown in FIGS. 3 (a) and 3 (b), the toothed washers 10, 11 have a rectangular structure, and the two side portions are bent to form an anchor portion. When the toothed washer is engaged with the inner ends of the rod members 8 and 9, the bent portion is directed outward. Male threads 8a and 9a are formed at the other ends of the rod members 8 and 9 so that the wing nuts 12 and 13 are engaged with screws from the outside.

Next, a method of injecting the concrete repair agent into the concrete wall surface using the above-described injection plug device will be described with reference to FIGS. 4 to 6.

As shown, the concrete wall surface is composed of the inner concrete body (B) and the outer mortar layer (A), the peeling space layer (C) is formed on the boundary between the concrete body (B) and the mortar layer (A), A repair agent is filled in the exfoliation space layer (C).

First, the injection groove (D) is formed from the outside of the concrete wall surface, the injection groove (D) is generally arcuate or semi-circular, the lower portion of the injection groove reaches the peeling space layer (C) See also 4). Further, as clearly shown in FIG. 5, the injection groove is set to a predetermined width slightly larger than the width of the toothed washers 10, 11 and the external diameters of the guide posts 2, 3. Two cutting grooves formed in parallel with each other to form the arc-shaped or semi-circular injection groove D are first formed by a circular concrete saw or blade, and then to crush the mortar layer portion between the two cutting grooves. The concrete wall is crushed by the hammer. Thereafter, the crushed pieces or chips are removed by the intake means. In addition, the two cutting grooves are formed by operating the concrete cutter with one circular saw twice. However, the double blade-type concrete cutter disclosed in Japanese Patent Application No. 1989-274,028 is useful for forming two cutting grooves which are formed in parallel with each other at precise intervals.

In particular, as shown in FIG. 18, the double blade type concrete cutter includes two circular blades 101a and 101b, a spacer 101c, a spindle 102, a flexible shaft 103, a handle pipe 104, It comprises a chip collecting cover 105, a chip suction duct 106 and a flexible chip collecting hose 107. The handle pipe 104 is formed of a light material such as light metal and carbon, and the two circular blades 101a and 101b are interchangeably supported at the leading end of the handle pipe 104. The circular blades 101a and 101b are installed in parallel with each other through the internal space formed by the spacer 101c, and these blades are commercially available as cutting blades for cutting the surface of concrete or asphalt road. As a blade, there exists a product manufactured by Sangyo Diamond High School. The cutter is driven through the spindle 102 and the flexible shaft 103 by portable drive means (not shown). Concrete chips or powder generated during the cutting operation collide with the chip collecting cover 105, and then the handle pipe 104, the chip suction duct 106, and the flexible chip collecting device simultaneously with the operation of the suction blower (not shown). It is sucked into the chip collecting bag (not shown) through the hose 107.

Next, the guide posts 2 and 3 are inserted into the arcuate grooves D for installing the plug device on the concrete wall surface. Prior to such installation, the wing nuts 12 and 13 are rotated in one direction (counterclockwise) so that the inner ends of the rod members 8 and 9 are formed so as to obtain a washer shape as shown in FIG. 3A. It moves away from the inner ends of the guide posts 2 and 3 to move the toothed washers 10 and 11 away from the inner ends of the guide posts 2 and 3. Therefore, the width of the toothed washer can be made smaller than the width of the arc-shaped groove D in order to facilitate the insertion of the washer and guide post into the arc-shaped groove D. FIG.

Upon completion of the insertion of the guide posts 2, 3 into the arc-shaped groove D, the wing nuts 12, 13 are rotated in the opposite direction (clockwise) so that the rod members 8, 9 are externally provided. To be moved. Therefore, the bent anchors or toothed portions of the toothed washers 10, 11 are in contact with the inner ends of the columnar guideposts 2, 3 and are further compressed, thereby reducing the angle of the bent portions. Such that the toothed washer can have an almost flat shape as shown in FIG. Therefore, the width of the toothed washers 10, 11 is increased to be larger than the width of the arc-shaped groove D. Therefore, the first bent portion is screwed into the side wall of the arcuate groove D to perform the function of the anchor, so that the plug device can be fixedly coupled to the concrete wall surface. When the wing nuts 12 and 13 are rotated further, the packing 7 is firmly pressed onto the outer surface of the mortar layer A, thereby preventing leakage of the concrete repair agent through the packing part.

Subsequently, an injection nozzle (not shown) of an injection pump (not shown) is connected to the injection nipple 14 to pressurize a concrete repair agent such as cement slurry into the separation space layer C. Upon completion of this injection, the injection nozzle is separated from the injection nipple 14 and the wing nuts 12 and 13 are rotated in one direction. By this rotation, the rod members 8 and 9 are moved inward, so that the toothed washers 10 and 11 are also moved inward. By this movement, the anchoring portions of the toothed washers 10, 11 are separated from the wall of the arc-shaped groove D, and the toothed washers 10, 11 recover the original bent structure. Then, the plug device is separated from the concrete wall surface, and the pouring operation is completed.

Next, with reference to Figures 7 to 10 with respect to the injection plug of the concrete repair agent according to the second embodiment of the present invention, the same parts and components as those of the first embodiment are denoted by the same reference numerals. do. The plug device is provided with toothed grip posts 20 and 30 (not shown) instead of the guide posts 2 and 3 of the first embodiment, and is loaded in place of the toothed washers 10 and 11 of the first embodiment. The trapezoidal slide pieces 21 and 31 (not shown) provided in the inner end of the member are provided. In the figure, for the sake of simplicity, another toothed grip post 30 and trapezoidal slide piece 31 are not shown.

9A to 9C show a detailed configuration of the toothed grip post 20 fixedly connected to the base 1 similarly to the first embodiment (see FIG. 7). The toothed grip post 20 has a rectangular cross section and is formed with a through hole through which the rod member 28 can penetrate. The through hole has an outer large inner diameter portion 20a, an intermediate small inner diameter portion 20b, and an inner taper. It is formed of the processing part 20c. The boundary between the outer and middle inner diameter portions 20a and 20b forms a stepped portion 20d, and an annular groove 20e is formed in the middle small inner diameter portion 20b. A ring 29 is fixed to the inner diameter portion 20a to prevent the rod member 28 from being separated from the grip post 20. The tapered portion 20c is adjacent to the inner end of the small diameter portion 20b, and the inner diameter thereof increases along the inner end of the grip post 20.

An uneven portion 20f having a rack-like surface is formed in the grip post 20 and on two outer surfaces thereof to engage with the sidewall of the arc-shaped groove D. As shown in FIG. The width of the grip post 20 in a direction parallel to the short side of the rectangular base 1 is formed to be slightly smaller than the width of the arc-shaped injection groove (D). The grip post 20 is formed of a high elastic body having a high elasticity such as spring steel so that it can be elastically deformed according to the expansion action by the trapezoidal slide piece 21 to be described later.

As shown in FIG. 7, the rod member 28 is integrally attached to the outer end by a wing nut 32 by a pin 33, and the rod member 28 has the step shape in the middle portion. The flange part 28a which can contact the part 20d is provided. In addition, the 0-ring 25 is connected to the inserted rod member 28 to fit into the annular groove 20e of the grip post 20 for sealing. The rod member 28 is formed with a male screw 28b in which the trapezoidal slide piece 21 can be screwed to an inner end thereof. The trapezoidal slide piece 21 is moved in the axial direction of the rod member 28 by the rod member 28 rotating around the axis by the rotation of the wing nut 32. The configuration of the trapezoidal slide piece 21 is shown in detail in FIGS. 10A to 10C. The slide piece 21 has a tapered surface 21a having the same inclination as the tapered portion 20c of the grip post 20, whereby a trapezoidal configuration is formed. In addition, the slide piece 21 is formed with an inner screw hole 21b for screwing with the male screw 28b of the rod member 28. According to the axial movement of the slide piece 21, the tapered surface 21a in contact with the tapered portion 20c can extend or reduce the inner end of the grip post 20 in FIG. 9B. .

Next, with reference to FIG. 7 and FIG. 8, the injection method of the concrete repair agent to a concrete wall surface using the injection plug apparatus which concerns on 2nd Embodiment of this invention is demonstrated. The arc-shaped injection groove D is temporarily formed as described above.

In order to assemble the plug device to the concrete wall surface, the wing nut 32 is rotated counterclockwise to move the trapezoidal slide piece 21 inward as shown in FIG. Therefore, the distance between the two rack-shaped deformations is smaller than the width of the injection groove D, so that the toothed grip post 20 can be inserted into the injection groove D.

Subsequently, as the wing nut 32 rotates clockwise, the rod member 28 rotates around its axis in the opposite direction. Therefore, the trapezoidal slide piece 21 is moved outward during the slide movement with respect to the tapered part 20c. Therefore, since the tapered portion 20c is elastically deformed, the rack-shaped uneven portion 20f is engaged with the sidewall of the injection groove D as shown in FIG. 8, so that the plug device is concrete. It can stick to the wall. As the wing nut 32 is rotated further clockwise, the packing 7 is pressed further towards the surface of the mortar layer A, thereby preventing leakage of the concrete repair agent from the packing 7.

Next, the injection plug device of the concrete repair agent according to the third embodiment of the present invention will be described with reference to FIGS. 11 to 17. In the plug device according to the third embodiment, the rectangular metal base 41, the cylindrical guide posts 42 and 43, the toothed washers 50 and 51, the D-rings 44 and 45, and the injection nipple fixing segment ( 46, the packing 47, the rod members 48 and 49, the toothed washers 50 and 51, the wing nuts 52 and 53 and the injection nipple 54 are disposed.

As shown in FIG. 11, the rectangular base 41 has four sides that are bent inwardly, and has a box shape without a lower portion as in the embodiment. In addition, the injection nipple fixing segment 46 is inserted into the center of the base 41, and the injection nipple 54 is screwed with the injection nipple fixing segment 46 as in the embodiment to introduce a cement slurry. Combined. Further, the metal guide posts 42 and 43 are arranged at positions opposite to each other with respect to the injection nipple fixing segment 46 in a direction parallel to the long side of the rectangular base 41, and the guide posts 42, 43. 43 is in close contact with the base 41. The packing 47 is retained inside the rectangular base 41. Unlike the first embodiment, the guide posts 42 and 43 are formed to be outside from the base 41.

As clearly shown in FIG. 12, the inner ends of the rod members 48 and 49 extend through the guide posts 42 and 43, and at the same time, the openings 41a and 41b formed in the base 41 are formed. And extend inwardly through the openings 47a and 47b formed in the packing 47 and protrude inwardly from the packing 47. Toothed washers 50 and 51 are also disposed at the protruding inner ends of the rod members 48 and 49, respectively. On the other hand, the outer ends of the rod members 48 and 49 are formed with male threads 48a and 49a that can be screwed with the wing nuts 52 and 53, respectively. In addition, hand grips 48b and 49b are provided at the outermost ends of the rod members 48 and 49 to manually move the rod members in the axial direction.

In addition, as shown in FIG. 12, the base ends of the guide posts 42 and 43 are formed with annular projections 42a and 43a extending radially inward from the inner circumferential surface of the guide post. Therefore, the annular region is formed by the combination of the bottom surfaces of the annular projections 42a and 43a, the inner circumferential surfaces of the guide posts 42 and 43, the outer circumferential surfaces of the rod members 48 and 49 and the upper surface of the base 41. do. In this annular region, the 0-rings 44 and 45 are interposed to connect the guide posts 42 and 43 and the rod members 48 and 49 so that the fluid does not leak.

13A and 13B show an example of the toothed washer 50 provided at the inner end of the rod member 48, and FIG. 13C shows a modification of the toothed washer. As shown in FIG. 13A, a spiral groove 48c is formed at the inner end portion (tip portion) of the rod member 48 to which the toothed washer 50 is engaged. The toothed washer 50 shown in FIG. 13b is generally formed in a circular shape having a diameter larger than the outer diameter of the rod member 48, and the toothed washer 50 is formed at the center with the spiral groove 48c. Engageable openings 100 are formed, and each of the six petal-shaped teeth 101 to 106 is bent outwardly (toward the base 41). Such a petal washer 50 can be easily purchased.

According to one modification of the toothed washer shown in FIG. 13C, the washer 50A is rectangular, and three teeth 101a to 103a are formed on one side thereof, while the other three on the opposite side are formed. Teeth 104a to 106a are formed.

14A to 14C show another example of the rod member 48A and the toothed washer 50C provided at the inner end of the rod member 48A. As shown in FIG. 14A, the rod member is shown. A small diameter rod 48d and a projection 48e for detachably engaging the deformed toothed washer 50c are formed integrally with the inner end of 48A. The deformed toothed washer 50c has a rectangular shape and has a central circular opening 100a and a slit 100b intersecting with the central circular opening. In addition, three teeth are formed on one side of the washer, and three other teeth are formed on the opposite side. In order to engage the toothed washer 50A with the rod 48d, as shown in FIG. 14C, the rod 48d and the protrusion 48e are respectively formed in the central circular opening 100a and the slit 100b. Then, as shown in Fig. 14B, the rod member 48A and the toothed washer 50C are rotated relatively by 90 degrees. Therefore, the projection 48e supports the flat portion of the washer to hold the washer relative to the rod member 48A.

Next, a method of injecting the concrete repair agent into the peeling space layer C using the plug device of the third embodiment will be described with reference to FIGS. 15 to 17. The plug device is mounted on the concrete wall and the hand grips 48b and 49b of the rod members 48 and 49 are pushed inward so that the tip of the rod member is inserted into the injection groove D.

In this case, since the toothed portion of the toothed washer is outwardly bent and the width of the washer becomes smaller than the width of the injection groove D, the toothed washers 50 and 51 are smooth in the groove D. Can be inserted.

Subsequently, the wing nuts 52 and 53 are rotated in the clockwise direction so that the wing nuts 52 and 53 are moved inward in the axial direction of the rod member according to the screws 48a and 49a. This inward movement (downward movement in FIG. 16) of the wing nuts 52, 53 is prevented when the wing nut is engaged with the flat outer ends of the guide posts 42, 43. Thereafter, as the wing nuts 52 and 53 are further rotated, the rod members 48 and 49 are moved outwardly (up in FIG. 16) along their axial direction. In this case, as shown in FIG. 16, the teeth of the toothed washers 50 and 51 are gradually screwed into the sidewalls of the injection groove by the elastic deformation because the toothed portions are bent outwardly. Thus, outward movement of the rod members 48 and 49 in the axial direction is prevented by sufficient engagement between the toothed washer and the wall of the injection groove. Thus, the plug device is securely fixed to the concrete wall. Further, by further rotating the wing nuts 52 and 53, the base 41 is forcibly moved inwardly so that the packing 47 is sufficiently compressed. Thus, the fluid leakage prevention work of the plug device against the concrete wall is completed.

Subsequently, an injection hose (not shown) extending from the injection pump (not shown) is coupled to the injection nipple 54, and low pressure injection of cement slurry is started in the state shown in FIG. As a result, not only the injection groove D but also the peeling space layer C is filled with cement slurry. Upon completion of this injection operation, the rod members 48, 49 rotate their axis about the counterclockwise direction by manually rotating the hand grips 48b, 49b counterclockwise. Therefore, the toothed washers 50 and 51 are separated from the front end (inner end) of the rod members 48 and 49. Subsequently, the rod members 48 and 49 are drawn out from the injection groove D while the separated toothed washers 50 and 51 are left in the injection groove D. It is separated from the concrete wall.

While the invention has been described in detail with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.

Claims (17)

An injection plug device for a repair agent into a concrete wall surface having an injection groove having a first width, comprising: a base member mounted over the injection groove on an outer surface of the concrete wall, and disposed in a central portion of the base member. Injection guide means for injecting into the injection groove, at least two guide posts extending from the base member to a position near the injection guide means, having a through hole, and having an inner end, respectively; Extends through and is movable outward from the inside of the injection groove and the concrete wall surface, respectively, and is disposed on one inner end of one of the rod member and the guide post, the same plurality of rod members having inner and outer ends, respectively; Before deformation, the width becomes a second width smaller than the first width, and after deformation, it engages the wall of the injection groove For injection plug device for concrete repair filler which comprises a resilient coupling member with the third width is larger than the first width. The injection plug apparatus of claim 1, wherein each elastic coupling member comprises a tooth washer attached to an innermost end of each rod member. The method of claim 2, wherein the toothed washer is formed of a rectangle having two opposite sides are bent to the outside, the surface having four uneven surfaces formed with irregularities, the distance between the two surfaces with the irregularities is formed before the deformation of the toothed washer; And a third width after deformation in the case where the two rods are formed and the corresponding rod member is moved outwardly in the axial direction. According to claim 1, wherein each guide post extends inward from the base member, the inner end is formed with an inner taper processing portion is gradually increased toward the innermost end of the guide post, each of the elastic coupling The member is slidably in the axial direction of the rod member so as to slide in contact with the tapered processing portion and the concave-convex portion of the opposing surface formed on the outer surface of the inner end of the guide post, and to selectively form the second and third widths. Injection plug device of a concrete repair agent, characterized in that consisting of a slide piece. 5. The slide piece according to claim 4, wherein the slide piece is screwable with the inner end of the rod member, and the uneven portion of the opposing surface forms a second width when the slide piece moves inward, and the slide piece moves outward. Injection plug device of a concrete repair agent, characterized in that to form a third width. The method of claim 1, wherein each of the elastic coupling member is made of a toothed washer replaceably installed on the inner end of the rod member, the toothed washer is removable from the inner end of the rod member at its relative rotation Injection plug device for concrete repair agent. The injection plug device of claim 1, wherein each of the toothed washers has irregularities formed on the outer surface of the toothed washer and is bent to the outside to engage with the sidewall of the injection groove. 8. The injection plug device of the concrete baking agent according to claim 7, wherein the inner end of the rod member is formed with a helical groove that is engageable with the toothed washer. According to claim 8, wherein each of the rod member is composed of an outer end with a male thread and the outermost end is provided with a hand grip, the guide post extends outward from the base member to form the outermost end, the injection plug The device includes a wing nut that is screwable with the male screw and movable in the axial direction of the rod member in accordance with the male screw, the wing nut being in contact with the outermost end of the guide post to the outside of the rod member in the axial direction. Injecting plug device of the concrete repair agent, characterized in that further moving to form a third width of the toothed washer. According to claim 1, wherein the base member is made of a rectangular having a short side opposite to the opposite long side, the guide post is disposed in a direction parallel to the long side and positioned opposite to the injection guide means Injection plug device of a concrete repair agent. 11. The method of claim 10, further comprising a packing located inside the rectangular base member in close contact with the outer surface of the concrete wall, and sealing means interposed between the guard post and the rod member. Injection plug device for concrete repair. The method of claim 9, wherein the base member is made of a rectangular having a short side opposite to the opposite long side, the guide post is disposed in a direction parallel to the long side, the opposite to the injection guide means Injection plug device for concrete repairs, characterized in that located. 13. The concrete according to claim 12, further comprising a packing located inside the rectangular base member in close contact with an outer surface of the concrete wall, and sealing means interposed between the guide post and the rod member. Injection plug device for repairing agent. Forming an arc-shaped injection groove having a first width and depth on the outer surface of the concrete wall surface, the injection plug device for injecting a repair agent into the concrete wall surface through the injection groove on the outer surface of the concrete wall surface, the arc-shaped Sealing the injection groove, and fixing the injection plug device to the arc-shaped injection groove, the concrete repair agent to the concrete inner wall, characterized in that the pressurized injection of a repair agent into the injection groove through the injection plug device. Injection method. 15. The injection plug device of claim 14, wherein the injection plug includes a base member covering the arc-shaped injection groove, and a coupling means engageable with the arc-shaped injection groove, wherein the coupling means has a second width smaller than the first width before deformation. And, after deformation, form a third width larger than the first width, and the disposing plug device forms a second width of the coupling means, inserts the coupling means into the arc-shaped injection groove, Placing a base member of the injection plug device in the arc-shaped injection groove so as to completely cover the opening end space of the arc injection groove. 16. The method of claim 15, wherein fixing the injection plug device comprises forming a third width of the coupling means by the coupling means inserted into the arc-shaped injection groove. . The method of claim 16, wherein the arc-shaped injection groove is formed using a double blade-type concrete cutter.