JP6901814B1 - Pipe mouth water stop method, water stop ring and pipe mouth water stop tool set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce the weakness of the connection between a concrete wall and a rigid pipe, and to carry out a pipe mouth water blocking method capable of stopping water leakage from around the pipe mouth in a simple and short time, and necessary for performing the method. It is an object of the present invention to provide a water blocking ring. SOLUTION: The first step of squeezing the circumference of a pipe mouth from a wall surface by at least about 3 cm to specify a water stagnation area to stop the water leakage is formed by connecting both ends of a coil spring, and the inner diameter is buried underground. A water stagnation ring having a ring smaller than the outer diameter of the pipe and a plurality of hoses connected to the ring and conducting water that has entered the inside of the ring is fitted into the underground buried pipe and flows into the water stagnation area. The second step of draining the water to the outside and filling the water stagnation area with water stagnation cement, and the third step of injecting a predetermined chemical solution from one of the hoses and continuing the injection until it flows out from the other. , Is included. [Selection diagram] FIG. 7

Description

The present invention relates to a pipe opening water stopping method for stopping water leakage from around the pipe opening of an underground buried pipe arranged on the peripheral wall of a manhole, a drainage basin or other concrete structure, and a water stopping ring used in the water stopping method. It also relates to a pipe mouth water stop device set to which a chemical cartridge is added.

Concrete structures such as manholes and stiles are installed at branching points and lead-in points of underground water and sewage pipelines, power cables, and communication cable pipelines, and the connection between these concrete structures and pipes is Mortal is used.
However, it is exposed to ground movements such as earthquakes and uneven subsidence, or heavy traffic volume, and it is easy for drainage to occur due to cracks and breakage in pipes and connections due to long-term use. In particular, at the connection between the sewer pipe and the structure, there is a problem that the treatment cost increases because even groundwater other than domestic wastewater, which does not require treatment, is sent to the treatment plant.
Therefore, a shielding member is arranged on the inner peripheral wall portion of the manhole and the inner peripheral portion of the rigid pipe, a pressure adjusting member is arranged at a place covering the inner peripheral wall portion, covered with the pressing fixing member, fixed with the fixing member, and then the shielding member. A water blocking method has been proposed in which a coagulant is injected between the pipe and the inner peripheral portion of the rigid pipe (see Patent Document 1).

In addition, if the concrete is cracked or damaged due to ground vibration, the sewage flow function cannot be maintained. Therefore, connect with a flexible joint made mainly of rubber or soft plastic to make it earthquake resistant. (See Patent Document 2).
On the other hand, when the groundwater level is high and the groundwater is also present in the ground outside the existing pipe, it is conceivable to provide an injection hole around the opening of the manhole and inject the water blocking agent from there. There is a risk of generically referring to pipes.
Therefore, an injection hole leading to the outside of the manhole is formed from the inside of the manhole to the outer peripheral portion of the existing pipe (at a position of 150 mm or more from the existing pipe) by a perforator, and a water blocking agent is injected to solidify the existing pipe. Stop the groundwater. Then, a method has been proposed in which the ground outside the pipe connecting portion is excavated with a cutting device, and a water blocking member made of a rubber material is filled therein to repair the pipe connecting portion (see Patent Document 3).

Japanese Patent No. 5972239 Japanese Unexamined Patent Publication No. 2001-26937 Japanese Patent No. 681205

However, the method described in Patent Document 1 is not practical because it is necessary to prepare members of various sizes when the pipe diameters are different. Further, applying the method described in Patent Document 2 to an existing pipe involves a large-scale excavation work, so that the construction period and cost are too long. Further, the method described in Patent Document 3 cannot be applied to a small manhole or a drainage basin in which an excavator cannot be inserted.
In view of such circumstances, the present invention reinforces the weakness of the connection between the concrete wall and the rigid pipe, and is a pipe mouth water blocking method capable of stopping water leakage from the vicinity of the pipe mouth easily and in a short time. The purpose is to provide a water stop ring and a water stop tool set necessary for carrying out the construction method.

The pipe opening water blocking method of the present invention is a pipe opening water blocking method that searches for holes provided in the peripheral wall of a concrete structure and stops water leakage from the vicinity of the pipe opening of the underground buried pipe fixed to the peripheral wall. hand,
It is formed by combining both ends of the coil spring with the first step of identifying the water stagnation area where the water leakage is stopped by scraping the circumference of the pipe mouth at least about 3 cm from the wall surface, and the inner diameter is outside the underground buried pipe. small and the ring than the diameter, the outer peripheral surface of the underground pipe with waterproof ring having a plurality of hoses which are connected to the ring water entering inside the ring conducts present in the inner part of the water stagnation It is fitted to the outflow of water flowing into the water stagnation as well as drained out, and a second step of filling the waterproofing cement該止waters, injecting a predetermined chemical liquid from one of the hose, the other It is characterized by including a third step of continuing the injection until the injection is performed.
In this way, the circumference of the pipe opening is squeezed at least about 3 cm from the wall surface to make it a water stagnation area, and a water stagnation ring in which a hose is connected to a ring formed by a coil spring is fitted to the underground buried pipe to make the water stagnation area. If a method of draining the water flowing into the water stagnation to the outside with a hose is used, the water stagnation area can be reliably filled with the water stagnation cement. In addition, if the chemical solution is injected from the hose after filling with the waterproof cement in this way, the chemical solution will be reliably injected over a wide area into voids such as the inside of the water stop ring and the leak point in the water stop area. Therefore, it is possible to stop water leakage for a long period of time.
Here, in the second step, when the water leakage does not stop even if the water-stopping cement is filled to the extent that the water-stopping ring is hidden, another water-stopping ring is further fitted to the residue. A step of filling the water stagnation area with the water stagnation cement can be included.
Further, the third step also includes a step of injecting a predetermined chemical solution from one of the hoses in the other water stop ring and continuing until the chemical solution flows out from the other hose. It is also preferable to include a step of injecting the chemical solution from the body, and after the injected chemical solution is cured, cutting the hose protruding from the wall surface.

The water blocking ring of the present invention is formed by connecting both ends of a coil spring , and is connected to a ring whose inner diameter is smaller than the outer diameter of an underground buried pipe fixed to the peripheral wall of a concrete structure. It has a plurality of hoses through which water that has entered the cavity inside the ring conducts through the gap of the coil spring, and the area around the pipe opening of the underground buried pipe is squeezed at least about 3 cm from the wall surface to form a water stop area. The ring is placed on the outer peripheral surface of the underground buried pipe existing in the inner part and pressure-welded, the groundwater flowing out to the water blocking area is drained to the outside by the hose, and the water stopping cement is filled in the water stopping area. The hose is used to inject a chemical solution into the narrowed groundwater distribution route to stop the water .
The ring is formed by welding or adhering both ends of a long tension coil spring having a predetermined outer diameter, and the outer diameter is equal to or less than the outer diameter of the tension coil spring at at least two places of the ring. It is preferable that a short compression coil spring is locked to the tension coil spring and a connecting portion for fitting the hose is provided.
In this way, the water blocking ring used in the pipe opening water blocking method can be easily produced at low cost.
Ductal orifice waterproofing instrument set of the present invention has the above-described water stopping ring, a nozzle fitted to the hose, a predetermined chemical liquid is characterized by comprising a cartridge filled.

According to the pipe opening water blocking method of the present invention and the water stopping ring used in the method, the water leakage stopping work around the pipe opening of the underground buried pipe can be easily performed even by a non-expert. Since the rubber-like chemical material permeates not only the inside of the water-stopping ring but also a wide range of areas where water is leaking due to cracks, etc., the water can be stopped reliably and the water-stopping effect can be maintained for a long period of time. Can be made to.

FIG. 1 is a diagram showing a manhole as an example. FIG. 2 is a diagram showing an example of a water blocking ring of the present embodiment used in the water stopping method of the present embodiment. FIG. 3 is a diagram showing an example of a first step of specifying a water stagnation area. FIG. 4 is a diagram showing an example of a step of fitting the water blocking ring to the underground buried pipe in the second step. FIG. 5 is a diagram showing an example of a step of filling the water stagnation area in which the water stagnation ring is installed with the water stagnation cement in the second step. FIG. 6 is a diagram showing an example of a reinforcement step in the case where water leaks from the surroundings while filling the waterproof cement because the groundwater momentum is intense. FIG. 7 is a side sectional view showing an example of the third step of injecting the chemical solution into the water stagnation area.

Hereinafter, the pipe mouth water blocking method and the embodiment of the water stopping ring of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing a manhole as an example, FIG. 1 (a) is a side sectional view of a peripheral wall, and FIG. 1 (b) is a front view.
As shown in FIG. 1, the peripheral wall 2 of the manhole 1 has a hole 4 for searching the underground pipe 3, and the underground pipe 3 searched there is filled with mortar 7 around the pipe opening 5. It is fixed.
However, due to ground fluctuations, the underground pipe 3 and the peripheral wall 2 move differently, and because the materials are different from each other, the affinity is low. Therefore, cracks and gaps occur around the peripheral wall 2, especially the underground pipe 3. It is easy for groundwater to enter from the cracked part, and water leaks 6 from around the pipe opening 5.
Here, an example is shown in which the concrete structure is a manhole 1 and water leaks from the pipe opening 5 of the underground buried pipe 3 connected to the peripheral wall 2, but the concrete structure is a manhole installed on a public road. It is not necessary to limit the number to 1, and it may be a drainage basin installed on private land, or it may be applied to the wall surface of the basement of a building in the same manner.

FIG. 2 is a diagram showing an example of a water blocking ring of the present embodiment used in the water stopping method of the present embodiment.
In the water blocking ring 20 shown in FIG. 2, both ends of a long tension coil spring 11 having a predetermined outer diameter are welded 16 to form a ring 13, and tension coil springs are formed at two locations around the ring 13. A connecting portion 15 is provided in which a short compression coil spring 12 having an outer diameter equal to or less than the outer diameter of 11 is entwined and locked, and a hose 14 is fitted to the connecting portion 15.
Since the gap between the wires of the compression coil spring 12 is larger than the gap between the wires of the tension coil spring 11, the tip of the compression coil spring 12 is entwined with the plurality of wires of the tension coil spring 11 and rotated. This can be locked.
Here, both ends of the tension coil spring 11 are connected by welding 16, but they may be bonded and joined with an adhesive.
Since the inner diameter of the ring 13 is slightly smaller than the outer diameter of the underground pipe 3, if it is expanded and fitted into the underground pipe 3 from the pipe opening 5, the ring 13 will be placed on the outer circumference of the underground pipe 3. It is pressed tightly.
Since the connecting portion 15 that is entwined and locked with the tension coil spring 11 is conducting with the ring 13 formed by the tension coil spring 11, it flows into the water stop area 9 through cracks and gaps 8 around the pipe opening 5. However, the groundwater invades the inside of the ring 13 and is guided to the hose 14 through the connecting portion 15 and drained to the outside.
The water blocking ring 20 shown here is formed of a tension coil spring 11 having an outer diameter of about 12 mm to 30 mm, and the connecting portion 15 is formed of a compression coil spring 12 having an outer diameter of about 12 mm.
The connecting portion 15 projects from the ring 13 by about 15 mm, and a hose having an inner diameter of about 12 mm is fitted in the protruding portion. The water-stopping ring 20 having an inner diameter of about 100 mm to 200 mm has two places on the ring 13, and the water-stopping ring 20 having an inner diameter of about 450 mm to 600 mm has a ring 13-4. The water-stopping ring 20 having an inner diameter of about 100 mm to 200 mm of the ring 13 is provided with connecting portions 15 at two locations of the ring 13.
However, the numerical values shown here are examples, and it is not always necessary to limit them to these numerical values.

3 to 6 are views showing the construction procedure of the pipe opening water blocking method of the present embodiment as an example.
3A and 3B are views showing an example of a first step of specifying a water stagnation area, FIG. 3A is a side sectional view of the manhole peripheral wall, and FIG. 3B is a front view of the manhole peripheral wall.
As shown in FIG. 3, the peripheral wall 2 of the manhole 1 has a hole 4 for searching the underground buried pipe 3, and the mortar 7 is filled around the underground buried pipe 3 searched for in the hole 4. It is fixed to the peripheral wall 2. Therefore, the mortar 7 around the pipe opening 5 is scraped from the wall surface to a depth of at least about 3 cm by using a pick hammer or the like to specify a water stop area 9 for stopping water leakage.
The groundwater that has entered through the cracks and gaps 8 around the pipe opening 5 has flowed out to the water stagnation area 9.
Here, the chipping is done to a depth of 4 cm from the wall surface, but the depth of chipping is preferably 3 cm to 5 cm.

FIG. 4 is a diagram showing an example of a step of fitting the water blocking ring to the underground buried pipe in the second step, and FIG. 4 (a) is a side sectional view of the manhole peripheral wall, FIG. 4 (b). Is a front view of the manhole peripheral wall.
As shown in FIG. 4, the ring 13 is expanded and fitted to the pipe opening 5 as deep as possible in the water stagnation area 9 formed by chipping from the pipe opening 5 of the underground buried pipe 3 to a depth of 4 cm. The water ring 20 is arranged.
Since the outer diameter of the ring 13 of the water stop ring 20 is substantially equal to the outer diameter of the pipe opening 5, when it is expanded and fitted, it is pressed against the outer peripheral surface of the underground pipe 3. The ends of the two hoses 14 fitted to the connecting portion 15 are outside the pipe opening 5 and inside the manhole 1. Therefore, the groundwater flowing out to the water stagnation area 9 invades the inside of the ring 13 and circulates, and is guided by the conductive connecting portion 15 to be drained from the hose 14 into the manhole 1.

FIG. 5 is a diagram showing an example of a step of filling the water stagnation area where the water stagnation ring is installed in the second step, and FIG. 5 (a) is a side sectional view of the manhole peripheral wall. FIG. 5B is a front view of the manhole peripheral wall.
As shown in FIG. 4, most of the groundwater flowing out to the water stagnation area 9 is drained by the water stagnation ring 20, so that the water stagnation area 9 including the periphery of the water stagnation ring 20 is filled with the water stagnation cement 21. However, it can be packed until it is flush with the wall surface.

FIG. 6 shows an example of a reinforcement step in the second step shown in FIG. 5 in which water leaks from the surroundings while the groundwater flowing out to the water stagnation area is violently filled with the water stagnation cement. 6A is a side sectional view of the manhole peripheral wall, and FIG. 6B is a front view of the manhole peripheral wall.
As shown in FIG. 6, when the water leakage does not stop even if the water-stopping cement 21 is filled to the extent that the water-stopping ring 20 is hidden, another water-stopping ring 20 is further covered from the pipe opening 5 to the underground buried pipe 3. Fit and drain with another hose 14. Then, the remaining water stagnation area 9 where the water leakage has almost stopped is filled with the water stagnation cement 21 and packed until it is flush with the wall surface.

FIG. 7 is a side sectional view showing an example of the third step of injecting the chemical solution into the water stagnation area.
As shown in FIG. 7, the water stagnation area 9 is specified by scraping the mortar 7 around the underground buried pipe 3 to a depth L of about 3 to 5 cm from the wall surface, and the groundwater flowing out to the water stagnation area 9 is underground. The water is drained from the hose 14 of the water stop ring 20 which is press-welded to the buried pipe 3 and fitted. Then, the entire area of the water stagnation area 9 is filled with the water stagnation cement 21. However, the inside of the water stop ring 20 is hollow, and all the leaked groundwater invades through the gap of the tension coil spring 11 forming the water stop ring 20 and is drained from the hose 14.
Next, the chemical solution is injected into the narrowed groundwater distribution route, and the route is blocked to prevent water leakage.
First, when the water-stopping cement 21 in the water-stopping area 9 is hardened, the cartridge 22 containing the chemical solution is loaded into the gun 23, and the nozzle of the cartridge 22 is fitted into the hose 14 at a lower position to fill the gun 23. Then, filling is continued until the chemical solution overflows from the hose 14 at the higher position.
Then, when the injection of the chemical solution from the hose 14 at the lower position is completed, it is preferable to inject the chemical solution from the hose 14 at the higher position just in case.
When the chemical solution has hardened, the hose 14 protruding from the wall surface is cut.
Here, as the chemical solution, there are water glass type, urethane type, urea type, acrylamide type and the like, but from the viewpoint of workability, a cartridge type that can be injected with a dedicated gun 23 is preferable, and it reacts with water. A hydrophilic polyurethane cartridge 22 that foams and then becomes a rubber-like elastic gel is suitable.
Here, the case where one water stop ring 20 is installed is shown, but the case where two water stop rings 20 are installed may be the same, so the figure is omitted.

It can be applied not only to sewer pipes but also to stop water leakage from the wall surface around the mouth of a water supply pipe, a communication cable or a power cable.

1 Manhole 2 Peripheral wall 3 Underground pipe 4 Hole 5 Pipe port 6 Leakage 7 Mortar 8 Cracks and gaps 9 Water stagnation area 11 Tension coil spring 12 Compression coil spring 13 Ring 14 Hose 15 Connection part 16 Welding 20 Water stop ring 21 Water stop cement 22 Cartridge 23 Gun

Claims (7)

It is a pipe opening water blocking method that searches through holes provided in the peripheral wall of a concrete structure and stops water leakage from the vicinity of the pipe opening of the underground buried pipe fixed to the peripheral wall.
The first step of identifying the water stagnation area where the water leakage is stopped by scraping the circumference of the pipe mouth by at least 3 cm from the wall surface.
For water stagnation having a ring formed by connecting both ends of a coil spring and having an inner diameter smaller than the outer diameter of the underground pipe, and a plurality of hoses connected to the ring and conducting water that has entered the ring. The second step of fitting the ring on the outer peripheral surface of the underground buried pipe existing in the inner part of the water stagnation area, draining the water flowing into the water stagnation area to the outside, and filling the water stagnation area with water stagnation cement. When,
A pipe opening water blocking method comprising a third step of injecting a predetermined chemical solution from one of the hoses and continuing the injection until the solution flows out from the other. In the second step, when the water leakage does not stop even if the water-stopping cement is filled to the extent that the water-stopping ring is hidden, another water-stopping ring is further fitted to cover the remaining water-stopping area. The pipe opening water blocking method according to claim 1, further comprising a step of filling the water blocking cement. 2. The third step includes a step of injecting a predetermined chemical solution from one of the hoses in the other water stop ring and continuing until the chemical solution flows out from the other. Pipe mouth water stop method. The third step according to claim 1 or 3, wherein the third step includes a step of injecting the chemical solution from the other side of the hose, and after the injected chemical solution is cured, cutting the hose protruding from the wall surface. Pipe mouth water stop method. A ring formed by connecting both ends of a coil spring and having an inner diameter smaller than the outer diameter of an underground pipe fixed to the peripheral wall of a concrete structure , and a ring connected to the ring and inside the ring through a gap of the coil spring. It has multiple hoses through which the water that has entered the cavity conducts,
The ring is covered and pressure-welded to the outer peripheral surface of the underground buried pipe existing in the inner part of the specified water stagnation area by scraping the circumference of the pipe mouth of the underground buried pipe by at least 3 cm from the wall surface to stop the underground pipe. The groundwater flowing out to the water area is drained to the outside by the hose, and the water stagnation area is filled with the water stagnation cement, and the chemical solution is injected from the hose into the narrowed groundwater distribution route to stop the water. Water ring. The ring is formed by welding or adhering both ends of a long tension coil spring having a predetermined outer diameter, and at least two places of the ring having a short outer diameter equal to or less than the outer diameter of the tension coil spring. The water-stopping ring according to claim 5, wherein a connecting portion is provided in which the compression coil spring is locked to the tension coil spring and the hose is fitted. A pipe mouth water stop device set comprising the water stop ring according to claim 5 and a cartridge having a nozzle to be fitted into the hose and filled with a predetermined chemical solution.

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