KR20240044941A - Waterproofing liquid injection device for waterproofing construction of leaking parts of underground buildings - Google Patents

Abstract

The present invention seeks to provide a waterproofing liquid injection device (1) for waterproofing construction in leaking areas of underground buildings, which allows quick and comfortable construction by easily and simply injecting waterproofing liquid into the leaking areas of underground buildings. An inlet hole 21 is formed that penetrates the inside and outside to allow water to flow from the outside to the inside, and a transfer path 22 is formed that communicates with the inside of the inlet hole 21 so that the waterproofing liquid is transported downward in the longitudinal direction from the inside to the bottom. The body portion 2 is formed, and the lower part of the body portion 2 is formed in a slanted and pointed shape so as to be narrow, and is configured to be embedded in the upper part of the ceiling slab 100, and is in communication with the transfer path 22 on the inside to allow the waterproofing liquid to flow into the ceiling. An injection part (3) formed with a discharge hole (31) penetrating to discharge into the crack (400) created in the slab (100), and a body so that the injection part (3) can be forcibly driven into or pulled out of the ceiling slab (100). It is characterized in that it includes a striking part (4) installed at the top of the part (2) and configured to inflict a blow. According to the present invention, the ceiling slab (100) of an underground building can be installed without demolishing the above-ground structure (200). Since leaking cracks can be waterproofed, a number of effects can be expected, such as improved work convenience, shorter construction period, and reduced construction costs during waterproofing repair work, as well as reduced labor costs and improved safety.

Description

Waterproofing liquid injection device for waterproofing construction of leaking parts of underground buildings}

The present invention relates to a waterproofing liquid injection device. To describe this in more detail, when a water leak occurs in the ceiling slab of an underground building, it is easy to place the water leak in the water to prevent the inconvenience or long time of waterproofing repair work by ground structures such as flower beds. This relates to a waterproofing fluid injection device for waterproofing construction in leaky areas of underground buildings that allows simple injection of waterproofing fluid.

In general, in order to prevent rainwater or various types of moisture from being absorbed or seeped into the concrete structure of a construction structure (apartment housing, underground parking lot, underground driveway, underground green living facility, utility conduit, etc.), a waterproofing solution such as a waterproof coating film is applied to the outside of the concrete structure. is applied, and waterproofing construction is carried out so that a protective film such as urethane is applied to the outside of the applied waterproofing liquid. Press mortar can be installed directly on the outside of this waterproofing layer, or insulation means can be interposed.

At this time, the concrete layer of the ceiling slab of an underground building, such as an underground parking lot such as an apartment complex, an underground shopping mall, or a subway, corresponds to the lower part of the ground on land, and various ground structures such as driveways, sidewalks, and flower beds are installed on the upper part. If water leakage occurs due to a crack in the ceiling slab of an underground building where flower beds, etc. are installed on top of the waterproofing layer constructed on the upper part, moisture such as rainwater is absorbed or seeps into the ceiling of the underground building, and if a water leak occurs, it is promptly rectified. A variety of repair construction methods were being developed to ensure proper waterproofing.

According to the existing concrete structure repair method of Republic of Korea Patent No. 1713935 (announced on March 9, 2017), water leakage of the repair object is prevented, including the step of setting a repair boundary area on the repair object and performing repair work within the repair boundary area. This is to prevent it. If you look closely at this, if a crack occurs in a concrete structure consisting of a waterproof layer, a mortar layer, and a ground layer at the top of the concrete layer, a hole is drilled into the surface of the concrete layer within the repair boundary, a pipe is installed, and an injection part is placed on the pipe. A technology has been developed to connect and inject an injection agent, but this is a technology that is difficult to repair when a crack occurs in the upper part of the concrete layer, a crack occurs in the waterproof layer, and the crack is not visible in the lower part of the concrete layer.

In addition, the applicant and the inventor first developed the technology and disclosed it after applying for Korean Patent Publication No. 650 of 2022 (published on January 4, 2022) and Korean Patent Publication No. 651 of 2022 (published on January 4, 2022). This exists, and in the previously published patent application No. 10-2022-0000651, as in the above-mentioned Patent No. 1713935, a hole is drilled through a plurality of holes through the concrete layer toward the crack, but an acrylic repair material is directly injected into the hole without a pipe. The technology has been developed, and in the previously published application No. 10-2022-0000650, cracks occur not in the concrete layer, but in the insulation layer and protective layer laminated on top of the waterproof layer on the upper surface of the concrete layer, so that cracks do not occur in the waterproof layer or the concrete layer. If not, a technology has been developed to drill holes from the upper protective layer to the insulation layer and then inject acrylic repair material right before the waterproof layer. However, the previously filed and published Nos. 10-2022-0000650 and 10-2022-0000651 also use concrete. When cracks occur in the layer and the waterproofing layer, or when these cracks are not visible in the lower part of the concrete layer, remove the flower bed, ground, and protective layer from the protective layer, the ground, or the flower bed installed on the ground directly to the cracked area and remove the upper part of the waterproof layer. There were problems such as the inconvenience of waterproofing again, longer construction time, and increased construction costs. In order to waterproof the water leakage area, the flower bed, ground, protective layer, and insulation layer were removed and waterproofing construction was performed again. Since heavy equipment was needed, there were a number of problems, including the problem that mobilizing heavy equipment would lead to the creation of new cracks.

KR 10-1713935 B1 2017. 3. 9. KR 10-2022-0000650 2022. 1. 4. KR 10-2022-0000651 2022. 1. 4.

In the present invention, a new technology was created to solve all the problems of the prior art described above. This invention is a ceiling of an underground building where a space is created underground and a crack occurs in the concrete layer and waterproof layer of the ceiling slab, which is the lower layer of the ground. When an insulation layer was formed on the surface of the concrete layer in the city's basement, it was difficult to drill holes for injecting waterproofing fluid into the concrete layer and waterproofing layer from the ground or underground, as in the prior art. In order to eliminate the inconvenience of construction and the high construction time and cost required for waterproofing construction after demolishing ground structures such as The invention was completed with the goal of providing a waterproofing liquid injection device for waterproofing work in leaky parts of underground buildings, which allows the waterproofing liquid to be very easily injected into connected cracks.

In addition, although not separately described, other purposes within the scope that can be inferred by taking into account the specific content, claims, and drawings for carrying out the following invention, which describes in detail the waterproofing liquid injection device for waterproofing construction of water leaks in underground buildings of the present invention, is also included in the overall problem of the present invention.

As a specific means for solving the problem of the above-mentioned invention, the present invention constitutes a waterproofing liquid injection device for waterproofing work on water leakage areas in underground buildings. An inlet hole is formed that penetrates the inside and outside to allow inflow into the body, and a body is provided with a conveying path that communicates with the inside of the inlet hole and penetrates to allow the waterproofing liquid to be transported downward in the longitudinal direction from the inside to the bottom. The bottom of the body is narrow at the bottom. It is formed in a slanted and pointed shape to be embedded in the upper part of the ceiling slab, and is provided with an injection part that communicates with the transfer path on the inside and has a discharge hole that penetrates to discharge the waterproofing liquid into the cracks formed in the ceiling slab. The injection part is forced into the ceiling slab. It is characterized by a striking part installed at the top of the body so that it can be driven into or pulled out and configured to give a blow.

A locking protrusion is provided at the bottom of the body to be wider than the top of the injection section so that the bottom of the body is caught when the injection section is inserted into the internal hole or crack, or the upper end is caught outside the upper part of the injection section. It may be characterized by being provided with an elastic sealing band that is coupled to the chin and is configured to block the waterproofing liquid discharged through the discharge hole of the injection unit from leaking upward along the outer peripheral surface of the injection unit from the inner entrance hole or crack.

It is provided with an elastic sealing pad configured to block the waterproof liquid that is inserted into the coupling groove formed in the circumferential direction on the outer peripheral inclined surface of the injection unit and discharged through the discharge hole of the injection unit from leaking upward along the outer peripheral surface of the injection unit through the internal hole or crack. It can be characterized as being

In addition, a sealing ring is integrally formed on the outside of the sealing band or sealing pad to protrude outward while rotating in the circumferential direction with a predetermined upper and lower gap to further block the waterproof liquid from leaking upward through the outer surface of the sealing band or sealing pad. is further provided, or a coupling reinforcement groove or a protruding coupling reinforcement protrusion formed on the outside of the inner groove on the outside of the injection part to prevent the sealing pad from being separated and moved from the injection part, and an inner groove on the inside of the sealing pad corresponding to the inner groove. It may be characterized in that it is further provided with a coupling reinforcement protrusion formed to protrude to fit into the coupling reinforcement groove or a coupling reinforcement groove formed inward to fit into the coupling reinforcement protrusion of the inner groove.

In addition, the striking part is provided with a guide coupled to the upper end of the body, and a fixing stopper is fixed to the upper end of the guide so as to protrude outward than the guide. A coupling hole through which the guide is penetrated is formed to penetrate upward and downward on the inside, so that it descends along the guide. It may be characterized by being provided with a hammer configured to hit the body and hit the fixed stopper when rising along the guide.

According to a specific means for solving the above-described problem, the waterproofing liquid injection device for waterproofing construction of water leakage areas in underground buildings of the present invention has an injection part narrowly inclined downward at the bottom of the rod-shaped body, which causes cracks in the underground building and water leakage. Compared to the conventional method of demolishing ground structures such as flower beds, sidewalks, driveways, and ground from the upper ground level, waterproofing construction had to be done after removing ground structures. Instead, it is possible to connect the protective layer, waterproofing layer, and concrete layer of the lower ground through the ground structures without the need to demolish the ground structures. After drilling towards the generated crack, the injection part of the injection device is inserted into the drilled internal hole, and the discharge hole at the bottom of the injection part is inserted towards the crack of the ceiling slab, so that the ground structure is not demolished just by drilling the internal hole towards the crack. Since waterproofing repair work can be easily performed on leaking cracks in the ceiling slab without any problems, the effect of improving the convenience of work and shortening the construction period during waterproofing repair work can be obtained, thereby reducing the cost of waterproofing repair construction. You can obtain the effect that can be maximized.

In addition, according to the present invention, there is no need for demolition of ground structures such as flower beds, sidewalks, and driveways, so there is no need for demolition workers, and only a small number of people are needed for waterproofing construction, so the number of people required can be greatly reduced, thereby minimizing labor costs and reducing construction costs. It can be further reduced, and safety can be significantly improved by reducing personnel and changing construction methods.

1 is a three-dimensional diagram showing a preferred example of the present invention.
Figure 2 is a cross-sectional view showing a preferred example of the present invention.
Figure 3 is a cross-sectional view showing a second example of the injection part in the present invention.
Figure 4 is a cross-sectional view showing a third example of the injection part in the present invention.
Figure 5 is a cross-sectional view showing a fourth example of the injection part in the present invention.
Figure 6 is a cross-sectional view showing a fifth example of the injection part in the present invention.
Figures 7a to 7c are work process diagrams showing water leakage repair work of a ceiling slab using the present invention.

In the present invention, when a water leak occurs in an underground building, the above-ground structures such as flower beds or ground are lifted out and waterproofing is performed, and then the inconvenience of installing the above-ground structure again occurs, and the waterproofing work takes a long time. To prevent this, the aim is to provide a waterproofing liquid injection device for waterproofing construction in leaky areas of underground buildings, which allows for quick and comfortable waterproofing construction by easily and simply injecting waterproofing liquid into the water leakage area. This will be explained in more detail with the drawings below. The attached drawings are only examples for easily explaining the content and scope of the technical idea of the present invention and are not limited thereto, and the terms used are also only for explaining the embodiments in detail and should not be construed as limited to the corresponding terms. No, it doesn't work.

As shown in FIG. 1, the waterproofing liquid injection device (1) for waterproofing water leakage areas in underground buildings of the present invention includes a body portion (2) that supports up and down when the waterproofing liquid is supplied and transported, and a lower end of the body portion (2). An injection part (3) that discharges the waterproofing liquid and injects the waterproofing liquid into the cracks caused by the cracks (400), and is installed at the top of the body part (2) and strikes to strongly drive in or pull out the injection part (3). It is largely divided into a striking part (4).

To describe the waterproofing liquid injection device 1 of the present invention in more detail, as shown in FIG. 2, the body part 2 is supplied to the tip of the supply hose 300 of the waterproofing liquid so that the waterproofing liquid flows in from the outside to the inside on one upper side. An inlet hole 21 is formed that penetrates the inside and outside so that the connector 301 on which the control valve 302 is installed is coupled by screwing, etc., and the inlet hole 21 is formed inside the body portion 2 in the vertical and longitudinal direction. A transfer path 22 is formed that communicates with the inside and penetrates the waterproofing liquid downwardly to the bottom.

At this time, the injection part 3 at the bottom of the body 2 may be formed integrally with the body 2, or may be installed to be replaceable at the bottom of the body 2 using a screw fastening method or the like. The part (3) is formed in a slanted and pointed shape so that the lower part is narrower than the upper part so that it is embedded in the upper part of the ceiling slab (100), and is in communication with the transfer path (22) inside the injection part (3) so that the waterproofing liquid flows into the ceiling slab (100). A discharge hole 31 is formed that penetrates to discharge into the crack 400 created in .

In addition, the striking portion 4 is formed at the upper end of the body portion 2 so that the injection portion 3 is inserted into the inner hole 600 drilled with the drill 500 and can be forcibly driven into or extracted from the ceiling slab 100. It is installed on and configured to give a blow, and this striking part 4 includes a rod-shaped guide 41 coupled to the upper end of the body part 2 as shown in FIGS. 1 and 2, and the A fixing stopper 42 is fixed to the top of the guide 41 so as to protrude outward from the outer peripheral surface of the guide 41, and a coupling hole through which the guide 41 is penetrated is formed on the inside to penetrate upward and downward, so that the guide 41 rides on the guide 41. When descending, the body part (2) is struck, and when ascending along the guide (41), the fixing stopper (42) is struck, and the injection part (3) can be strongly driven into the crack (400) with a downward blow, and the ceiling slab with an upward blow. It is made of a heavy body configured to easily extract the injection part (3) from (100), and although not shown, a handle is provided on one side of the hammer (43) so that the hammer (43) can be easily raised and lowered on the guide (41). It can be.

In the present invention, as shown in FIGS. 1 and 2, a locking protrusion (5) is formed at the bottom of the body portion (2), and the locking protrusion (5) has an end wider than the upper end of the injection portion (3). It is formed so that when the injection part 3 is inserted into the internal hole 600 or the crack 400, the lower part of the body part 2 is caught to prevent it from being injected too deeply.

As another example of the injection unit 3 of the present invention, as shown in FIG. 3, which is a second example, the outer peripheral surface of the injection unit 3 is coupled to the top outside of the injection unit 3 so that its upper end is caught by the locking protrusion 5. A cylindrical sealing band (6) having elasticity such as rubber, urethane, or silicone is provided to be elastically coupled to the sealing band (6). When injecting into (600) or crack (400), the waterproofing liquid is not sufficiently injected into the crack (400) at the bottom of the inner hole (600), and the outer peripheral surface of the injection part (3) is The purpose is to block the leaking upward from the outer slope of the injection unit (3) and the rear of the inner entrance hole (600) or crack (400).

As shown in FIG. 4, which is a third example, the injection unit 3 of the present invention has a coupling groove 71 formed in the circumferential direction on the inclined surface of the outer circumference of the injection unit 3, and is coupled to the outer circumferential surface of the injection unit 3. A sealing pad (7) is provided in a cylindrical shape and has elasticity such as rubber, urethane, or silicone to be elastically coupled to the groove (71). The sealing pad (7) is also provided at the injection part (3) like the sealing band (6). When the waterproofing liquid discharged through the discharge hole 31 is injected into the internal hole 600 or the crack 400, the waterproofing liquid is not sufficiently injected into the crack 400 at the bottom of the internal hole 600, and the internal hole 600 or the crack ( 400) It is to block leakage from the inlet upward along the outer circumferential surface of the injection part 3 between the outer circumferential surface of the injection part 3 and the inner entrance hole 600 or crack 400.

As shown in FIG. 5, which is the fourth example, the injection part 3 of the present invention protrudes outward on the outside of the sealing pad 7 of the third example, or, although not shown, is the sealing band of the second example of the injection part 3. It can be configured to protrude outward on the outside of the sealing band (6) or the sealing pad (7), and is made of elastic rubber or integrally formed to protrude outward while rotating in the circumferential direction so as to have a predetermined upper and lower gap on the outside of the sealing band (6) or the sealing pad (7). A sealing ring (8) made of urethane or silicon is provided, and is configured to further block the waterproof liquid from leaking upward through the outer surface of the sealing band (6) or sealing pad (7).

In addition, the injection part 3 of the present invention includes a coupling reinforcement protrusion 9 and a sealing pad 7 installed to protrude inward on the inside of the sealing pad 7 of the third example, as shown in FIG. 6, which is the fifth example. ) is formed on the outside of the coupling groove 71 of the injection part 3 to which the coupling reinforcement groove 91 is formed to fit the coupling reinforcement protrusion 9 of the sealing pad 7. The fifth example of (3) can be implemented in various embodiments not shown, including those in FIG. 6, and is provided on the outside of the injection unit 3 to prevent the sealing pad 7 from being separated and moved from the injection unit 3. Combination of the coupling reinforcement groove 91 or the protruding coupling reinforcement protrusion 9 formed on the outside of the coupling groove 71 and the coupling groove 71 on the inside of the sealing pad 7 corresponding to the coupling groove 71. A coupling reinforcement protrusion 9 protruding to be fitted into the reinforcement groove 91 or a coupling reinforcement groove 91 formed internally so that the coupling reinforcement protrusion 9 of the coupling groove 71 is fitted can be provided.

The waterproofing liquid injection device (1) for waterproofing water leakage areas in underground buildings of the present invention, configured as described above, is used to inject water from the concrete layer (101) or the upper part of the ceiling slab (100) of underground buildings such as underground parking lots or underground green facilities, as shown in FIG. 7a. When cracks such as cracks 400 occur in the waterproofing layer 102 of urethane waterproofing or the upper protective layer 103 of mortar, rain or moisture on the ground causes cracks 400 in the ceiling slab 100 to go underground. Water leakage occurs through the ground, and at this time, the conventional repair construction method is the ground 201 laid on the upper part of the ceiling slab 100 and the sidewalk 202 (person road) or roadway 203 (vehicle road) or flower bed on the upper part of the ground 201. After removing the ground structure 200 such as (204), the protective layer 103 is broken, and then the cracked waterproof layer 102 is removed, or a new waterproof layer 102 is formed on top of the cracked waterproof layer 102. , there was the inconvenience of reinstalling ground structures 200 such as sidewalks 202, driveways 203, or flower beds 204 above the protective layer 103 and the ground 201, but in the present invention, As shown in 7a, when a crack 400 occurs in the ceiling slab 100 and water leakage occurs, as shown in FIG. 7b, the ground structure 200 is left as is and then the ceiling slab ( 100), a hole is drilled to form an internal hole 600, and as shown in FIG. 7C, the waterproofing liquid is injected at high pressure into the internal hole 600 or the crack 400 using the waterproofing liquid injection device 1 of the present invention to form a ceiling. This allows for local waterproofing repair work on cracked areas throughout the slab (100).

In this way, when a water leak occurs in the ceiling slab 100 of an underground building, a crack 400 in the ceiling slab 100 is created with a drill 500 while the ground structure 200 above the ceiling slab 100 is left as is. An internal hole 600 is formed by drilling to the desired location, and the injection part 3 of the injection device 1 is inserted downwardly through the internal hole 600, so that the discharge hole 31 of the injection part 3 is cracked ( 400), and at this time, the hammer 43 of the striking part 4 is lowered along the guide 41 to hit the upper part of the body part 2, so that the lower end of the injection part 3 is lodged in the crack 400. After locking, open the supply control valve 302 of the connector 301 to allow the waterproofing liquid to flow into the inlet hole 21 of the body 2 through the supply hose 300 and inject it through the inner transfer path 22. When the waterproofing liquid is discharged through the discharge hole (31) of the part (3), the high-pressure waterproofing liquid is injected between the cracks (400), and the waterproofing liquid is continuously supplied so that the waterproofing liquid is injected deep into the crack (400). The sealing band (6) or sealing pad (7) and sealing ring (8) connected to (3) seal and block the waterproofing liquid so that it does not leak through the outer surface of the injection part (3) and penetrates into the crack (400). At this time, a coupling reinforcement groove 91 and a coupling reinforcement protrusion 9 that are mutually fitted between the sealing pad 7 and the coupling groove 71 of the injection unit 3 are formed to attach the sealing pad 7 to the injection unit 3. ) can be attached more firmly.

In addition, by injecting high-pressure waterproofing liquid into the crack 400 and hardening it, then raising the hammer 43 to hit the fixing stopper 42, the injection portion 3 of the injection device 1 can be easily removed from the ceiling slab 100. After taking it out of the inner entrance hole (600) and closing the inner entrance hole (600), the waterproofing repair work is completely completed, and the waterproofing liquid injection device (1) of the present invention can be used not only on the ceiling slab (100) of an underground building, but also on the ground level. Since flower beds 204, etc. are installed on the roof of the building, it can also be applied to the rooftop slab.

According to the present invention, even if a water leak occurs in the ceiling slab 100 of an underground building, waterproofing repair work is performed by drilling a hole with a drill 500 without removing the above-ground structure 200 and locally injecting waterproofing liquid at high pressure into the leaking area. Since it is done more easily, the construction period can be shortened, and both labor and construction costs can be reduced, so it can provide waterproofing construction with superior economic effectiveness, and has various benefits.

As described above, the most preferred embodiments of the present invention have been described in the detailed description of the present invention, but various modifications may be made without departing from the technical scope of the present invention. Therefore, the scope of protection of the present invention is limited to the above-mentioned embodiments. Rather than being limited to examples, the scope of protection should be recognized to include the technologies in the patent claims described later and equivalent technical means from these technologies.

100: Ceiling slab 101: Concrete layer 102: Waterproof layer 103: Protective layer
200: Ground structure 201: Ground 202: Sidewalk 203: Driveway 204: Flower bed
300: Supply hose 301: Connector 302: Supply control valve
400:Crack
500: drill
600: My entrance hall
1: Injection device
2: Body 21: Inlet hole 22: Transfer path
3: Injection part 31: Discharge hole
4: Hitting unit 41: Guide 42: Fixed stopper 43: Hammer
5:Latching jaw
6: Sealed band
7: Sealing pad 71: Combining groove
8: Sealing ring
9: Coupling reinforcement protrusion 91: Coupling reinforcement groove

Claims (5)

On one side of the upper part, an inlet hole 21 is formed that penetrates the inside and outside to allow the waterproofing liquid to flow in from the outside to the inside, and a transfer path communicates with the inside of the inlet hole 21 so that the waterproofing liquid is transported downward in the longitudinal direction from the inside to the bottom. Body portion (2) formed with (22);
The lower part of the body part 2 is formed in an inclined and pointed form so that the lower part is narrow, and is configured to be embedded in the upper part of the ceiling slab 100, and is in communication with the transfer path 22 on the inside, so that the waterproofing liquid creates a crack in the ceiling slab 100. An injection portion (3) formed with a discharge hole (31) penetrating to discharge into (400);
A striking part (4) installed on the top of the body part (2) and configured to give a blow so that the injection part (3) can be forcibly driven into or pulled out of the ceiling slab (100);
A waterproofing liquid injection device for waterproofing construction in leaking areas of underground buildings, characterized in that it includes.
In claim 1;
The bottom of the body part 2 is formed with a step wider than the top of the injection part 3, so that when the injection part 3 is inserted into the internal hole 600 or the crack 400, the body part 2 A locking protrusion (5) configured to catch the lower end;
A waterproofing liquid injection device for waterproofing construction in leaking areas of underground buildings, characterized by including this.
In claim 2;
The upper outside of the injection unit (3) is coupled so that the upper end is caught by the locking protrusion (5), so that the waterproofing liquid discharged through the discharge hole (31) of the injection unit (3) is discharged from the injection unit (600) or crack (400). A sealing band (6) having elasticity configured to block leakage to the upper side along the outer peripheral surface of (3);
A waterproofing liquid injection device for waterproofing construction in leaking areas of underground buildings, characterized in that it includes.
In claim 1;
The waterproofing liquid that enters the coupling groove 71 formed to be indented in the circumferential direction on the outer peripheral inclined surface of the injection unit 3 and is discharged through the discharge hole 31 of the injection unit 3 is discharged from the internal hole 600 or the crack 400. A sealing pad (7) having elasticity configured to block leakage to the upper side along the outer peripheral surface of the injection unit (3);
A waterproofing liquid injection device for waterproofing construction in leaking areas of underground buildings, characterized in that it includes.
In claim 1;
The hitting portion (4) includes a guide (41) coupled to the top of the body portion (2);
A fixed stopper (42) fixed to the top of the guide (41) so as to protrude outwardly from the guide (41);
A coupling hole through which the guide 41 is penetrated is formed to penetrate upward and downward on the inside, and is configured to hit the body portion 2 when descending on the guide 41 and to hit the fixed stopper 42 when ascending on the guide 41. Hammer (43);
A waterproofing liquid injection device for waterproofing construction in leaking areas of underground buildings, characterized in that it includes.

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